JP2020184780A - Broadcast receiver - Google Patents

Abstract

To provide a digital broadcast receiver capable of executing a high value-added function.SOLUTION: A broadcast receiver can receive video data of a digital broadcast program respectively transmitted by a first media transport method and a second media transport method, which are at least two medium transport method having different time systems. The broadcast receiver comprises: a first reception part for receiving program video data transmitted by the first medium transport method; a second reception part for receiving the program video data transmitted by the second medium transport method; a video information generation part which synchronizes representation of the program video data in the two medium transport methods based on the different time systems, by using correspondence of notation in the respective time systems on representation time of the program video data in the two medium transport methods based on the different time systems, and generates output video information by synthesizing the data; and a display part for displaying the output video information.SELECTED DRAWING: Figure 7A

Description

The present invention relates to a broadcast reception technique and an output video information generation technique.

One of the extended functions of the digital broadcasting service is data broadcasting, which transmits digital data by broadcasting waves and displays various information such as weather forecasts, news, and recommended programs. Many television receivers capable of receiving data broadcasting are already on the market, and many technologies related to data broadcasting reception have been published including the following Patent Document 1.

Japanese Unexamined Patent Publication No. 2001-186486

In response to recent changes in the environment related to content distribution, TV receivers are also required to expand various functions. In particular, there are many demands for distribution of contents and linked applications using a broadband network environment such as the Internet, and demands for high resolution / high definition of video contents. However, it is difficult to provide a high-value-added television receiver that can meet the above demand only by diverting only the data broadcasting receiving function or the like provided in the current television receiver or by expanding the function of the data broadcasting receiving function or the like. ..

An object of the present invention is to provide a broadcast receiving device capable of executing a function having higher added value.

As a means for solving the above-mentioned problems, the technique described in the claims is used.

By using the technique of the present invention, it is possible to provide a broadcast receiving device capable of executing a function having higher added value.

It is a system configuration diagram which shows an example of the broadcasting communication system including the broadcasting receiving apparatus which concerns on Example 1. FIG. It is explanatory drawing of the outline of the coded signal in MMT. It is a block diagram of MPU in MMT. It is a block diagram of the MMTP packet in MMT. It is a conceptual diagram of the protocol stack of the broadcasting system using MMT. It is a hierarchical block diagram of control information used in a broadcasting system. It is a list of tables used in TLV-SI of a broadcasting system. It is a list of descriptors used in TLV-SI of a broadcasting system. It is a list of messages used in MMT-SI of a broadcasting system. It is a list of tables used in MMT-SI of a broadcasting system. It is a list of descriptors used in MMT-SI of a broadcasting system (No. 1). It is a list of descriptors used in MMT-SI of a broadcasting system (No. 2). It is a figure which shows the relationship between the data transmission of a broadcasting system and each table. It is a block diagram of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a block diagram of the logical plane structure of the presentation function of the broadcast receiving apparatus which concerns on Example 1. FIG. FIG. 5 is a system configuration diagram of clock synchronization / presentation synchronization of the broadcast receiving device according to the first embodiment. It is a software configuration diagram of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a block diagram of the broadcasting station server which concerns on Example 1. FIG. It is a block diagram of the service provider server which concerns on Example 1. FIG. It is a block diagram of the mobile information terminal which concerns on Example 1. FIG. It is a software configuration diagram of the mobile information terminal which concerns on Example 1. FIG. It is a figure which shows the data structure of MH-TOT of a broadcasting system. It is a figure which shows the format of the JST_time parameter of a broadcasting system. It is a figure which shows the calculation method of the present date from MJD of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a figure which shows the structure of the NTP format of a broadcasting system. It is a figure which shows the data structure of the MPU time stamp descriptor of a broadcasting system. It is a figure which shows the data structure of the time information of the TMCC extended information area of a broadcasting system. It is operation sequence diagram at the time of the channel scan of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a figure which shows the data structure of TLV-NIT of a broadcasting system. It is a figure which shows the data structure of the satellite distribution system descriptor of a broadcasting system. It is a figure which shows the data structure of the service list descriptor of a broadcasting system. It is a figure which shows the data structure of AMT of a broadcasting system. FIG. 5 is an operation sequence diagram at the time of channel selection of the broadcast receiving device according to the first embodiment. It is a figure which shows the data structure of the MPT of a broadcasting system. It is a figure which shows the data structure of the LCT of a broadcasting system. It is a figure which shows the example of the layout assignment to the layout number based on LCT. It is a figure which shows the example of the layout assignment to the layout number based on LCT. It is a figure which shows the example of the layout assignment to the layout number based on LCT. It is a figure which shows the example of the layout assignment to the layout number based on LCT. It is a figure explaining the operation of exception handling of screen layout control based on LCT. It is a figure explaining the operation of exception handling of screen layout control based on LCT. It is a figure which shows the data structure of MH-EIT of a broadcasting system. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure at the time of the emergency warning broadcast display of the broadcast receiving device which concerns on Example 1. FIG. It is a block diagram of the broadcast receiving apparatus which concerns on Example 2. FIG. It is a figure explaining the inconsistency of the current time display at the time of switching a broadcasting service. It is a figure explaining the operation of the selection control of the present time information reference source which concerns on Example 2. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 2. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 2. FIG. It is a structure diagram of program data. It is a structure diagram of asset data. It is a figure which shows the data structure of a PA message. It is a figure which shows the data structure of MMT_general_location_info. It is a figure which shows the data structure of PLT. It is a figure which shows the meaning of a location type. It is a figure which shows the data structure of the MPU presentation area designation descriptor. It is a figure explaining the presentation operation which concerns on Example 3. FIG. It is a figure explaining the presentation operation which concerns on Example 3. FIG. It is a figure which shows the data structure of the LCT expiration date descriptor. It is a figure explaining the data structure of a layout expiration descriptor. It is a figure which shows the data structure of the presentation area expiration date descriptor. It is a figure which shows the data structure of the common presentation area information descriptor. It is a figure which shows the meaning of full_set_flag. It is a figure which shows the data structure of the duplicate presentation area designation descriptor. It is a figure explaining the presentation operation which concerns on Example 3. FIG. It is a figure explaining the presentation operation which concerns on Example 3. FIG. It is a figure which shows the data structure of the dependency descriptor. It is a figure explaining the presentation operation which concerns on Example 3. FIG. It is a figure which shows the data structure of the modification of the dependency descriptor. It is a figure which shows the meaning of the dependency_type. It is a figure explaining the presentation operation which concerns on Example 3. FIG. It is a figure explaining the presentation operation which concerns on Example 4. FIG. It is a figure explaining the presentation operation which concerns on Example 4. FIG. It is a figure which shows the data structure of the content control descriptor. It is a figure which shows the meaning of the content control mode. It is a figure explaining the presentation operation which concerns on Example 4. FIG. It is a figure explaining the presentation operation which concerns on Example 4. FIG. It is a figure explaining the presentation operation which concerns on Example 4. FIG. It is a figure explaining the presentation operation which concerns on Example 4. FIG. It is a figure which shows the protocol stack of the MPEG2-TS system. It is a figure which shows the data structure of the time stamp offset descriptor. It is a figure explaining the processing method of time information which concerns on Example 5. FIG. It is a figure which shows the data structure of the MPU time stamp descriptor. It is a figure which shows the data structure of the asset presentation area designation descriptor. It is a figure which shows the data structure of the asset time stamp descriptor.

Hereinafter, examples of embodiments of the present invention will be described with reference to the drawings.
(Example 1)

[System configuration]
FIG. 1 is a system configuration diagram showing an example of a broadcasting communication system including the broadcasting receiving device of this embodiment. The broadcasting communication system of this embodiment includes a broadcasting receiving device 100 and an antenna 100a, a broadband network such as the Internet 200, a router device 200r and an access point 200a, a broadcasting station radio tower 300t and a broadcasting satellite (or communication satellite) 300s, and a broadcasting station. It is composed of a server 300, a service provider server 400, another application server 500, a mobile telephone communication server 600, a base station 600b of a mobile telephone communication network, and a mobile information terminal 700.

The broadcast receiving device 100 receives the broadcast wave transmitted from the radio tower 300t via the broadcasting satellite (or communication satellite) 300s and the antenna 100a. Alternatively, the broadcast wave transmitted from the radio tower 300t may be directly received from the antenna 100a without going through the broadcasting satellite (or communication satellite) 300s. Further, the broadcast receiving device 100 can be connected to the Internet 200 via the router device 200r, and can transmit and receive data by communicating with each server device and other communication devices on the Internet 200.

The router device 200r is connected to the Internet 200 by wired communication, is connected to the broadcast receiving device 100 by wired communication or wireless communication, and is connected to the mobile information terminal 700 by wireless communication. For the wireless communication, a method such as Wi-Fi (registered trademark) may be used. As a result, each server device and other communication devices on the Internet 200, the broadcast receiving device 100, and the portable information terminal 700 can mutually perform data transmission / reception via the router device 200r. The communication between the broadcast receiving device 100 and the mobile information terminal 700 may be directly performed by a method such as Bluetooth (registered trademark) or NFC (Near Field Communication) without going through the router device 200r.

The radio tower 300t is a broadcasting facility of a broadcasting station, and transmits broadcast waves including coded data of broadcast programs, subtitle information, other applications, general-purpose data, and the like. The broadcasting satellite (or communication satellite) 300s receives the broadcasting wave transmitted from the radio tower 300t of the broadcasting station, performs frequency conversion and the like as appropriate, and then broadcasts the broadcast to the antenna 100a connected to the broadcasting receiving device 100. It is a repeater that retransmits waves. Further, the broadcasting station shall include a broadcasting station server 300. The broadcasting station server 300 stores metadata such as broadcast programs (video contents, etc.) and program titles, program IDs, program outlines, performer information, broadcast dates, etc. of each broadcast program, and stores the video contents and each metadata. , It shall be possible to provide to the service provider based on the contract. The moving image content and each metadata may be provided to the service provider through an API (Application Programming Interface) provided in the broadcasting station server 300.

The service provider server 400 is a server device prepared by the service provider, and is capable of providing various services linked to a broadcast program distributed from a broadcasting station. In addition, the service provider server 400 stores, manages, and distributes moving image contents and metadata provided by the broadcasting station server 300, various contents and applications linked to the broadcasting program, and the like. In addition, it shall also have a function of searching for available contents and applications and providing a list in response to inquiries from TV receivers and the like. It should be noted that the storage, management and distribution of the content and metadata and the storage, management and distribution of the application may be performed by different server devices. The broadcasting station and the service provider may be the same or different. A plurality of service provider servers 400 may be prepared for each different service. Further, the function of the service provider server 400 may be provided by the broadcasting station server 300.

The other application server 500 is a known server device that stores, manages, and distributes other general applications, operation programs, contents, data, and the like. There may be a plurality of other application servers 500 on the Internet 200.

The mobile telephone communication server 600 is connected to the Internet 200, while being connected to the mobile information terminal 700 via the base station 600b. The mobile telephone communication server 600 manages telephone communication (call) and data transmission / reception via the mobile telephone communication network of the mobile information terminal 700, and each server device and other communication devices on the mobile information terminal 700 and the Internet 200. It enables the transmission and reception of data by communication with. Communication between the base station 600b and the mobile information terminal 700 is performed by the W-CDMA (Wideband Code Division Multiple Access) (registered trademark) method, the GSM (Global System for Mobile communications) (registered trademark) method, and the LTE (LongTor) method. , Or it may be performed by another communication method.

The mobile information terminal 700 shall have a function of telephone communication (call) and data transmission / reception via a mobile telephone communication network and a function of wireless communication by Wi-Fi (registered trademark) or the like. The mobile information terminal 700 can be connected to the Internet 200 via the router device 200r or the access point 200a, or via the base station 600b and the mobile telephone communication server 600 of the mobile telephone communication network, and can be connected to the Internet 200 on the Internet 200. It is possible to send and receive data by communicating with each server device and other communication devices. The access point 200a is connected to the Internet 200 by wired communication, and is connected to the mobile information terminal 700 by wireless communication. For the wireless communication, a method such as Wi-Fi (registered trademark) may be used. Communication between the mobile information terminal 700 and the broadcast receiving device 100 is performed via the access point 200a, the Internet 200, and the router device 200r, or through the base station 600b, the mobile telephone communication server 600, the Internet 200, and the router device 200r. It may be done through.

[Overview of MMT method]
The broadcast receiving device 100 shown in FIG. 1 is defined by the MPEG (Moving Picture Experts Group) -2 system, which is widely used in conventional digital broadcasting systems, as a media transport method for transmitting data such as video and audio. Instead of the TS (Transport Stream) (hereinafter referred to as MPEG2-TS), it is assumed that the TV receiver is compatible with MMT (MPEG Media Transport). It may be a television receiver capable of supporting both MPEG2-TS and MMT.

MPEG2-TS is characterized in that components such as video and audio that make up a program are multiplexed into one stream together with a control signal and a clock. Since it is treated as one stream including the clock, it is suitable for transmitting one content on one transmission line in which transmission quality is ensured, and has been adopted in many conventional digital broadcasting systems. On the other hand, MPEG2-TS functions in response to changes in the environment related to content distribution, such as the diversification of content in recent years, the diversification of devices that use content, the diversification of transmission lines that distribute content, and the diversification of content storage environments. The newly formulated media transport method is MMT because of its limitations.

FIG. 2A shows an example of an outline of the coded signal in the MMT of this embodiment. As shown in the figure, the MMT of the present embodiment has an MFU (Media Fragment Unit), an MPU (Media Processing Unit), an MMTP (MMT Protocol) payload, and an MMTP packet as elements constituting the coded signal. And. The MFU is a format at the time of transmission of video, audio, or the like, and may be configured in units of NAL (Network Operation Layer) units or access units. The MPU may be composed of MPU metadata including information on the configuration of the entire MPU, movie fragment metadata including information on encoded media data, and sample data which is encoded media data. Further, it is assumed that the MFU can be extracted from the sample data. Further, in the case of media such as a video component and an audio component, the presentation time and the decoding time may be specified for each MPU or access unit. FIG. 2B shows an example of the configuration of the MPU.

The MMTP packet is composed of a header part and an MMTP payload, and transmits control information of MFU and MMT. The MMTP payload shall include a payload header according to the content (data unit) stored in the payload section. FIG. 2C shows an example of an outline of constructing an MFU from a video / audio signal, further storing it in an MMTP payload, and constructing an MMTP packet. In the video signal encoded by using the inter-frame prediction, it is desirable that the MPU is configured in GOP (Group Of Pictures) units. When the size of the MFU to be transmitted is small, one MFU may be stored in one payload unit, or a plurality of MFUs may be stored in one payload unit. Further, when the size of the MFU to be transmitted is large, one MFU may be divided and stored in a plurality of payload units. Further, the MMTP packet may be protected by using a technique such as AL-FEC (Appliation Layer Forward Error) or ARQ (Automatic Repeat Request) in order to recover the packet loss on the transmission path.

In the broadcasting system of this embodiment, MPEG-H HEVC (High Efficiency Video Coding) is used as the video coding method, and MPEG-4 AAC (Advanced Audio Coding) or MPEG-4 ALS (Audio Lossless) is used as the audio coding method. Coding) shall be used. Encoded data such as video and audio of broadcast programs encoded by each of the above methods is in the form of MFU or MPU, further put on an MMTP payload, converted into an MMTP packet, and transmitted as an IP (Internet Protocol) packet. And. Further, the data content related to the broadcast program may also be in the format of MFU or MPU, further mounted on the MMTP payload to form an MMTP packet, and transmitted as an IP packet. Data content transmission methods include subtitle / character super transmission method used for streaming data synchronized with broadcasting, application transmission method used for data transmission asynchronous with broadcasting, and synchronous / asynchronous message for applications running on TV receivers. Four types of event message transmission methods used for notification and general-purpose data transmission methods for transmitting other general-purpose data synchronously / asynchronously shall be prepared.

For the transmission of MMTP packets, UDP / IP (User Datagram Protocol / Internet Protocol) is used in the broadcast transmission line, and UDP / IP or TCP / IP (Transmission Control Protocol / Internet Protocol) is used in the communication line. .. Further, in the broadcast transmission line, a TLV (Type Length Value) multiplexing method is used for efficient transmission of IP packets. An example of the protocol stack of the broadcasting system of this embodiment is shown in FIG. In the figure, (A) is an example of a protocol stack in a broadcast transmission line, and (B) is an example of a protocol stack in a communication line.

In the broadcasting system of this embodiment, a mechanism for transmitting two types of control information, MMT-SI (MMT-Signaling Information) and TLV-SI (TLV-Signaling Information), shall be prepared. MMT-SI is control information indicating the structure of a broadcast program and the like. It shall be in the form of an MMT control message, put on an MMTP payload, converted into an MMTP packet, and transmitted as an IP packet. The TLV-SI is control information regarding IP packet multiplexing, and provides information for channel selection and correspondence information between an IP address and a service.

Further, even in a broadcasting system using MMT, time information is transmitted in order to provide an absolute time. In addition, while MPEG2-TS shows the display time of the component based on a different clock for each TS, MMT shows the display time of the component based on Coordinated Universal Time (UTC). To do. With these mechanisms, the terminal device can synchronously display the components transmitted from different transmission points on different transmission lines. In order to provide UTC, it is assumed that an IP packet in NTP (Network Time Protocol) format is used.

[Control information of broadcasting system using MMT]
In the broadcasting system supported by the broadcasting receiving device 100 of this embodiment, as described above, the control information includes TLV-SI related to the TLV multiplexing method for multiplexing IP packets and MMT which is the media transport method. Prepare the MMT-SI involved. The TLV-SI provides information for the broadcast receiving device 100 to demultiplex the IP packets multiplexed on the broadcast transmission line. The TLV-SI is composed of a "table" and a "descriptor". The "table" shall be transmitted in section format and the "descriptor" shall be placed within the "table". The MMT-SI is transmission control information indicating information related to the configuration of the MMT package and the broadcasting service. MMT-SI is composed of three layers: a "message" that stores "tables" and "descriptors", a "table" that has elements and attributes that indicate specific information, and a "descriptor" that indicates more detailed information. Shall be. FIG. 4 shows an example of the hierarchical structure of the control information used in the broadcasting system of this embodiment.

<Table used in TLV-SI>
FIG. 5A shows a list of "tables" used in the TLV-SI of the broadcasting system supported by the broadcasting receiving device 100 of this embodiment. In this embodiment, the following is used as the "table" of TLV-SI.

(1) TLV-NIT
The network information table for TLV (Network Information Table for TLV: TLV-NIT) represents information on the physical configuration of the TLV stream transmitted by the network and the characteristics of the network itself.

(2) AMT
The address map table (Addless Map Table: AMT) provides a list of multicast groups of IP packets that make up each service transmitted in the network.

(3) Table set by the business operator In addition, it is possible to prepare a table set by the service provider or the like.

<Descriptor used in TLV-SI>
FIG. 5B shows a list of "descriptors" arranged in the TLV-SI of the broadcasting system supported by the broadcasting receiving device 100 of this embodiment. In this embodiment, the following is used as the "descriptor" of TLV-SI.

(1) Service list descriptor The service list descriptor provides a list of services according to service identification and service type.

(2) Satellite distribution system descriptor The satellite distribution system descriptor indicates the physical conditions of the satellite transmission line.

(3) System management descriptor The system management descriptor is used to distinguish between broadcast and non-broadcast.

(4) Network name descriptor The network name descriptor describes the network name by character code.

(5) Descriptor set by the business operator In addition, it is possible to prepare a descriptor set by the service provider or the like.

<Message used in MMT-SI>
FIG. 6A shows a list of "messages" used in the MMT-SI of the broadcasting system supported by the broadcasting receiving device 100 of this embodiment. In this embodiment, the following is used as the "message" of MMT-SI.

(1) PA message The Package Access (PA) message is used to transmit various tables.

(2) M2 section message The M2 section message is used to transmit the section extension format of MPEG-2 Systems.

(3) CA message The CA message is used to transmit a table for identifying the limited reception method.

(4) M2 short section message The M2 short section message is used to transmit the section short format of MPEG-2 Systems.

(5) Data transmission message A data transmission message is a message that stores a table related to data transmission.

(6) Message set by the service provider In addition, it is possible to prepare a message set by the service provider or the like.

<Table used in MMT-SI>
FIG. 6B shows a list of "tables" used in the MMT-SI of the broadcasting system supported by the broadcasting receiving device 100 of this embodiment. The table is control information having elements and attributes indicating specific information, and is stored in a message and transmitted as an MMTP packet. The message for storing the table may be determined according to the table. In this embodiment, the following "table" of MMT-SI is used.

(1) MPT
The MMT Package Table (MPT) provides information that constitutes a package, such as a list of assets and the location of assets on the network. The MPT may be stored in a PA message.

(2) PLT
The package list table (Package List Table: PLT) shows a list of IP data flows and packet IDs for transmitting PA messages of MMT packages provided as a broadcasting service, and IP data flows for transmitting IP services. The PLT may be stored in a PA message.

(3) LCT
The layout setting table (Layout Configuration Table: LCT) is used to associate the layout information for presentation with the layout number. The LCT may be stored in the PA message.

(4) ECM
The Entitlement Control Message (ECM) is common information consisting of program information and control information, and delivers key information for descrambling and the like. The ECM may be stored in the M2 section message.

(5) EMM
The Enterprise Mobility Management (EMM) transmits individual information including contract information for each subscriber and key information for decrypting ECM (common information). The EMM may be stored in the M2 section message.

(6) CAT (MH)
The CA table (Conditional Access Table: CAT) (MH) is used to store descriptors for identifying the conditional access method. CAT (MH) may be stored in a CA message.

(7) DCM
The Download Control Message (DCM) transmits key-related information including a key for decrypting a transmission line code for download. The DCM may be stored in the M2 section message.

(8) DMM
The Download Management Message (DMM) transmits key-related information such as a download key for decrypting the DCM. The DMM may be stored in the M2 section message.

(9) MH-EIT
The MH-event information table (MH-Event Information Table: MH-EIT) is time-series information regarding events included in each service. The MH-EIT may be stored in the M2 section message.

(10) MH-AIT
The MH-Application Information Table (MH-AIT) stores all information about the application, the startup state required for the application, and the like. The MH-AIT may be stored in the M2 section message.

(11) MH-BIT
The MH-Broadcaster Information Table (MH-Broadcaster Information Table: MH-BIT) is used to present information on broadcasters existing on the network. The MH-BIT may be stored in the M2 section message.

(12) MH-SDTT
The MH-Software Download Trigger Table (MH-Software Download Trigger Table: MH-SDTT) is used for download notification information. The MH-SDTT may be stored in the M2 section message.

(13) MH-SDT
The MH-Service Description Table (MH-SDT) has a sub-table representing services included in a specific TLV stream, and information about the organization channel such as the name of the organization channel and the name of the broadcaster. To transmit. The MH-SDT may be stored in the M2 section message.

(14) MH-TOT
The MH-Time Offset Table (MH-TOT) transmits JST time and date (corrected Julian day) information. The MH-TOT may be stored in an M2 short section message.

(15) MH-CDT
The MH-Common Data Table (MH-CDT) is used to transmit the common data to be stored in the non-volatile memory in the section format to all the receivers that receive the MH-Common Data Table (MH-CDT). The MH-CDT may be stored in the M2 section message.

(16) DDM table The data directory management table (Data Directory Management Table: DDM table) provides a directory structure of files constituting an application in order to separate the file structure of the application from the structure for file transmission. The DDM table may be stored in the data transmission message.

(17) DAM table The data asset management table (Data Asset Management Table: DAM table) provides the configuration of the MPU in the asset and the version information for each MPU. The DAM table may be stored in the data transmission message.

(18) DCC table The data content management table (Data Content Configuration Table) provides configuration information of a file as data content in order to realize flexible and effective cache control. The DCC table may be stored in the data transmission message.

(19) EMT
The event message table (EMT) is used to transmit information about event messages. The EMT may be stored in the M2 section message.

(20) Table set by the business operator In addition, it is possible to prepare a table set by the service provider or the like.

<Descriptor used in MMT-SI>
6C and 6D show a list of "descriptors" arranged in the MMT-SI of the broadcasting system supported by the broadcasting receiving device 100 of this embodiment. Descriptors are control information that provides more detailed information and shall be placed in a table. The table in which the descriptor is placed may be determined according to the descriptor. In this embodiment, the following is used as the "descriptor" of MMT-SI.

(1) Asset group descriptor The asset group descriptor provides the group relationship of assets and the priority within the group. The asset group descriptor may be placed in the MPT.

(2) Event Package Descriptor The event package descriptor provides a correspondence between an event representing a program and a package. The event package descriptor may be placed in the MH-EIT transmitted in the M2 section message.

(3) Background color specification descriptor The background color specification descriptor provides the backmost background color in the layout specification. The background color specification descriptor may be placed in the LCT.

(4) MPU presentation area designation descriptor The MPU presentation area designation descriptor provides a position for presenting the MPU. The MPU presentation area specification descriptor may be placed in the MPT.

(5) MPU Time Stamp Descriptor The MPU time stamp descriptor indicates the presentation time of the first access unit in the presentation order in the MPU. The MPU timestamp descriptor may be placed in the MPT.

(6) Dependency Descriptor The dependency descriptor provides the asset ID of the asset having the dependency. Dependency descriptors may be placed in the MPT.

(7) Access control descriptor The access control descriptor provides information for identifying the limited reception method. The access control descriptor may be located in MPT or CAT (MH).

(8) Scramble method descriptor The scramble method descriptor provides information for identifying the encryption target and the type of the encryption algorithm at the time of scrambling. The scrambled descriptor may be located in MPT or CAT (MH).

(9) Message Authentication Method Descriptor The message authentication method descriptor provides information for identifying the message authentication method when performing message authentication. The message authentication method descriptor may be placed in MPT or CAT (MH).

(10) Emergency Information Descriptor (MH)
The emergency information descriptor (MH) is used when performing an emergency warning broadcast. The emergency information descriptor (MH) may be placed in the MPT.

(11) MH-MPEG-4 Audio Descriptor The MH-MPEG-4 audio descriptor describes basic information for specifying the encoding parameters of the ISO / IEC 14496-3 (MPEG-4 audio) audio stream. Used for. The MH-MPEG-4 audio descriptor may be placed in the MPT.

(12) MH-MPEG-4 audio extension descriptor The MH-MPEG-4 audio extension descriptor is used to describe the profile and level of the MPEG-4 audio stream and the setting specific to the encoding method. The MH-MPEG-4 audio extension descriptor may be placed in the MPT.

(13) MH-HEVC Video Descriptor The MH-HEVC video descriptor is described in ITU-T Recommendation H.K. 265 | Used to describe the basic coding parameters of the ISO / IEC 2308-2 video stream (HEVC stream). The MH-HEVC video descriptor may be placed in the MPT.

(14) MH-Link Descriptor The MH-link descriptor identifies a service provided when a viewer requests additional information related to a particular one described in a program sequence information system. The MH-link descriptor may be placed in MPT, MH-EIT, MH-SDT, etc.

(15) MH-Event Group Descriptor The MH-event group descriptor is used to indicate that a group of events is grouped when there is a relationship between a plurality of events. The MH-event group descriptor may be located in the MH-EIT.

(16) MH-Service List Descriptor The MH-Service List Descriptor provides a list of services by service identification and service type. The MH-service list descriptor may be located in the MH-BIT.

(17) MH-Short Event Descriptor The MH-Short Event Descriptor represents an event name and a short description of the event in text format. The MH-short event descriptor may be located in the MH-EIT.

(18) MH-Extended Event Descriptor The MH-Extended Event Descriptor is used in addition to the MH-Short Event Descriptor to provide a detailed description of the event. The MH-extended event descriptor may be located in the MH-EIT.

(19) Video Component Descriptor The video component descriptor shows parameters and explanations related to the video component, and is also used to express the elemental stream in a character format. The video component descriptor may be placed in MPT or MH-EIT.

(20) MH-stream identification descriptor The MH-stream identification descriptor is used because the component stream of the service is labeled and the description content indicated by the video component descriptor in the MH-EIT can be referred to by this label. .. The MH-stream identification descriptor may be placed in the MPT.

(21) MH-Content Descriptor The MH-content descriptor indicates the genre of the event. The MH-content descriptor may be placed in the MH-EIT.

(22) MH-Parent Rate Descriptor The MH-Parent Rate Descriptor represents an age-based viewing restriction and is used to extend to be based on other restriction conditions. The MH-parent rate descriptor may be placed in MPT or MH-EIT.

(23) MH-Voice Component Descriptor The MH-Voice Component Descriptor indicates each parameter of the voice elemental stream and is also used to represent the elemental stream in character format. The MH-voice component descriptor may be located in MPT or MH-EIT.

(24) MH-Target Area Descriptor The MH-Target Area Descriptor is used to describe a program or the area covered by some streams that make up the program. The MH-Target Area Descriptor may be located in the MPT.

(25) MH-series descriptor The MH-series descriptor is used to identify a series program. The MH-series descriptor may be located in the MH-EIT.

(26) MH-SI transmission parameter descriptor The MH-SI transmission parameter descriptor is used to indicate the transmission parameter of SI. The MH-SI transmission parameter descriptor may be located in the MH-BIT.

(27) MH-Broadcaster Name Descriptor The MH-Broadcaster Name Descriptor describes the name of the broadcaster. The MH-broadcaster name descriptor may be placed in the MH-BIT.

(28) MH-Service Descriptor The MH-Service Descriptor represents the organization channel name and its operator name in character code together with the service type. The MH-service descriptor may be located in the MH-SDT.

(29) IP data flow descriptor The IP data flow descriptor provides information on the IP data flow that constitutes the service. The IP data flow descriptor may be located in the MH-SDT.

(30) MH-CA activation descriptor The MH-CA activation descriptor describes activation information for invoking a CAS program on the CAS platform. The MH-CA activation descriptor may be located in MPT or CAT (CA).

(31) MH-Type Descriptor The MH-Type descriptor indicates the type of a file transmitted by the application transmission method. The MH-Type descriptor may be placed in the DAM table.

(32) MH-Info Descriptor The MH-Info descriptor describes information about an MPU or an item. The MH-Info descriptor may be placed in the DAM table.

(33) MH-Expire Descriptor The MH-Expire descriptor describes the expiration date of an item. The MH-Expire descriptor may be placed in the DAM table.

(34) MH-Compression Type Descriptor The MH-Compression Type descriptor means that the item to be transmitted is compressed, and indicates the compression algorithm and the number of bytes of the item before compression. The MH-Compression Type descriptor may be placed in the DAM table.

(35) MH-Data encoding scheme descriptor The MH-Data encoding scheme descriptor is used to identify the data encoding scheme. The MH-data encoding descriptor may be located in the MPT.

(36) UTC-NPT Reference Descriptor The UTC-NPT reference descriptor is used to convey the relationship between NPT (Normal Play Time) and UTC. The UTC-NPT reference descriptor may be placed in the EMT.

(37) Event Message Descriptor The event message descriptor conveys information about event messages in general. The event message descriptor may be placed in the EMT.

(38) MH-Local Time Offset Descriptor The MH-local time offset descriptor is used to give a constant offset value to the actual time (for example, UTC + 9 hours) and the display time to the human system when the daylight saving time is executed. The MH-local time offset descriptor may be located in the MH-TOT.

(39) MH-Component Group Descriptor The MH-Component Group Descriptor defines and identifies a combination of components in an event. The MH-component group descriptor may be located in the MH-EIT.

(40) MH-Logo Transmission Descriptor The MH-logo transmission descriptor is used to describe a character string for a simple logo, pointing to a logo in CDT format, and the like. The MH-logo transmission descriptor may be located in the MH-SDT.

(41) MPU Extended Timestamp Descriptor The MPU Extended Timestamp Descriptor provides the decryption time of the access unit in the MPU. The MPU extended timestamp descriptor may be placed in the MPT.

(42) MPU Download Content Descriptor The MPU download content descriptor is used to describe the attribute information of the content downloaded by using the MPU. The MPU download content descriptor may be located in MH-SDTT.

(43) MH-Network Downloadable Content Descriptor The MH-Network Downloadable Content Descriptor is used to describe the attribute information of the content downloaded using the network. The MH-Network Downloadable Content Descriptor may be located in the MH-SDTT.

(44) MH-Application Descriptor The MH-application descriptor describes information about the application. The MH-application descriptor may be located in the MH-AIT.

(45) MH-Transmission Protocol Descriptor The MH-Transmission Protocol Descriptor is used to specify a transmission protocol such as broadcasting or communication and to indicate the location information of an application depending on the transmission protocol. The MH-transmission protocol descriptor may be located in the MH-AIT.

(46) MH-Simple Application Location Descriptor The MH-Simple Application Location Descriptor is described to indicate the details of the acquisition destination of the application. The MH-Simple Application Location Descriptor may be located in the MH-AIT.

(47) MH-Application Boundary Authority Setting Descriptor The MH-Application Boundary Authority Setting Descriptor is described to set the application boundary and to set the authority for broadcasting resource access for each area (URL). The MH-application boundary authority setting descriptor may be placed in the MH-AIT.

(48) MH-Startup Priority Information Descriptor The MH-Startup Priority Information Descriptor is described to specify the start-up priority of the application. The MH-start priority information descriptor may be placed in the MH-AIT.

(49) MH-cache information descriptor The MH-cache information descriptor is described for use in cache control when the resources constituting the application are cached and held when the application is expected to be reused. .. The MH-cache information descriptor may be located in the MH-AIT.

(50) MH-stochastic application delay descriptor Since the MH-stochastic application delay descriptor delays the timing of application control by the amount of delay set probabilistically, assuming the load distribution of the server access of application acquisition. Describe in. The MH-stochastic application delay descriptor may be placed in the MH-AIT.

(51) Link destination PU descriptor The link destination PU descriptor describes another presentation unit that may transition from the presentation unit (PU). The linked PU descriptor may be placed in the DCC table.

(52) Lock cache specification descriptor The lock cache specification descriptor describes the specification of the file to be cached and locked in the presentation unit. The lock cache specification descriptor may be placed in the DCC table.

(53) Unlock cache specification descriptor The unlock cache specification descriptor describes the specification of the file to be unlocked among the files locked in the presentation unit. The unlock cache specification descriptor may be placed in the DCC table.

(54) Descriptor set by the business operator In addition, it is possible to prepare a descriptor set by the service provider or the like.

<Relationship between data transmission and each control information in the MMT method>
Here, the relationship between data transmission and a typical table in the broadcasting system supported by the broadcasting receiving device 100 of this embodiment will be described with reference to FIG. 6E.

In the broadcasting system supported by the broadcasting receiving device 100 of the present embodiment, data can be transmitted by a plurality of routes such as a TLV stream via a broadcasting transmission line and an IP data flow via a communication line. The TLV stream includes a TLV-SI such as TLV-NIT and AMT, and an IP data flow which is a data flow of an IP packet. The IP data flow includes a video asset including a series of video MPUs and an audio asset including a series of audio MPUs. Similarly, the IP data flow may include a subtitle asset including a series of subtitle MPUs, a character super asset including a series of character super MPUs, a data asset including a series of data MPUs, and the like. These various assets are associated with each other in a unit called "package" by MPT (MMT package table) stored in a PA message and transmitted. Specifically, the MPT has a package ID (corresponding to the "MMT_package_id_byte" parameter shown in FIG. 17 described later) and an asset ID of each asset included in the package (corresponding to the "asset_id_byte" parameter shown in FIG. 17 described later). Is described to make the association.

The assets that make up the package can be only the assets in the TLV stream, but as shown in FIG. 6E, the assets transmitted by the IP data flow of the communication line can also be included. This includes the location information of each asset included in the package (corresponding to "MMT_general_location_info ()" shown in FIG. 17 described later) in the MPT, and the broadcast receiving device 100 of the present embodiment refers to each asset. This can be achieved by making it recognizable. Specifically, by changing the value of the "MMT_general_location_infolocation_type" parameter arranged in the location information,
(1) Data multiplexed in the same IP data flow as MPT (location_type = 0x00)
(2) Data multiplexed in the IPv4 data flow (location_type = 0x01)
(3) Data multiplexed in the IPv6 data flow (location_type = 0x02)
(4) Data multiplexed on the broadcast MPEG2-TS (location_type = 0x03)
(5) Data multiplexed in MPEG2-TS format in the IP data flow (location_type = 0x04)
(6) Data at the specified URL (location_type = 0x05)
It is possible to configure the broadcast receiving device 100 so that various data transmitted through various transmission paths can be referred to.

Among the above-mentioned references, (1) is, for example, an IP data flow received via a digital broadcast signal received by the tuner / demodulation unit 131 of the broadcast receiving device 100 of FIG. 7A, which will be described later. When the MPT is included in the IP data flow on the communication line side and transmitted, the reference destination in (1) may be the IP data flow received by the LAN communication unit 121 described later via the communication line. Further, the above (2), (3), (5), and (6) are IP data flows received by the LAN communication unit 121, which will be described later, via a communication line. Further, (4) has a reception function for receiving a digital broadcast signal using the MMT method and a digital broadcast using the MPEG2-TS method, for example, like the broadcast receiving device 800 of the second embodiment shown in FIG. 24 to be described later. In the case of a broadcast receiving device having both receiving functions for receiving signals, digital broadcasting using the MPEG2-TS method is based on MPT location information (“MMT_general_location_info ()”) included in the digital broadcasting signal using the MMT method. It can be used to refer to the data multiplexed in the MPEG2-TS received by the receiving function for receiving the signal.

The data constituting the "package" is specified in this way, but in the broadcasting system supported by the broadcast receiving device 100 of this embodiment, a series of data in the "package" unit is converted into a "service" unit of digital broadcasting. Treat as.

Further, the MPT describes the presentation time information of each MPU designated by the MPT (corresponding to the “mpu_presentation_time” parameter shown in FIG. 13B described later), and a plurality of presentation time information designated by the MPT using the presentation time information. The MPU can be presented (displayed, output, etc.) in conjunction with the clock based on NTP, which is the time information in UTC notation. The presentation control of various data using the clock based on the NTP will be described later.

In the data transmission method of this embodiment shown in FIG. 6E, there is a concept of "event". "Event" is a concept indicating a so-called "program" handled by MH-EIT included in an M2 section message and sent. Specifically, in the "package" indicated by the event package descriptor stored in the MH-EIT, the duration is from the disclosure time stored in the MH-EIT (corresponding to the "start_time" parameter shown in FIG. 21 described later). A series of data included in the period (corresponding to the “duration” parameter shown in FIG. 21 described later) is the data included in the concept of the “event”. MH-EIT performs various processes in the "event" unit in the broadcast receiving device 100 of this embodiment (for example, program table generation process, recording reservation and viewing reservation control, copyright management process such as temporary storage). It can be used for such purposes.

[Hardware configuration of broadcast receiver]
FIG. 7A is a block diagram showing an example of the internal configuration of the broadcast receiving device 100. The broadcast receiving device 100 includes a main control unit 101, a system bus 102, a ROM 103, a RAM 104, a storage (storage) unit 110, a LAN communication unit 121, an expansion interface unit 124, a digital interface unit 125, a tuner / demodulation unit 131, and a separation unit 132. , Video decoder 141, video color gamut conversion unit 142, audio decoder 143, character super decoder 144, subtitle decoder 145, subtitle synthesis unit 146, subtitle color gamut conversion unit 147, data decoder 151, cache unit 152, application control unit 153, Consists of a browser unit 154, an application color gamut conversion unit 155, a sound source unit 156, a video synthesis unit 161, a monitor unit 162, a video output unit 163, a voice synthesis unit 164, a speaker unit 165, an audio output unit 166, and an operation input unit 170. Will be done.

The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving device 100 according to a predetermined operation program. The system bus 102 is a data communication path for transmitting and receiving data between the main control unit 101 and each operation block in the broadcast receiving device 100.

The ROM (Read Only Memory) 103 is a non-volatile memory in which basic operation programs such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM (Electrically Erasable Program ROM) or a flash ROM. Is used. The ROM 103 may store the operation setting values necessary for the operation of the broadcast receiving device 100. The RAM (Random Access Memory) 104 serves as a work area for executing a basic operation program and other operation programs. The ROM 103 and the RAM 104 may be integrated with the main control unit 101. Further, the ROM 103 may not have an independent configuration as shown in FIG. 7A, but may use a partial storage area in the storage (storage) unit 110.

The storage (storage) unit 110 stores an operation program of the broadcast receiving device 100, an operation setting value, personal information of a user of the broadcast receiving device 100, and the like. In addition, an operation program downloaded via the Internet 200 and various data created by the operation program can be stored. In addition, contents such as moving images, still images, and sounds acquired from broadcast waves or downloaded via the Internet 200 can also be stored. A part of the function of the ROM 103 may be replaced by a part of the storage (storage) unit 110. Further, the storage unit 110 needs to hold the stored information even when the broadcast receiving device 100 is not supplied with power from the outside. Therefore, for example, a device such as a non-volatile semiconductor element memory such as a flash ROM or SSD (Solid State Drive), a magnetic disk drive such as an HDD (Hard Disk Drive), or the like is used.

It is assumed that each of the operation programs stored in the ROM 103 and the storage (storage) unit 110 can be added, updated, and expanded in function by a download process from each server device on the Internet 200.

The LAN (Local Area Network) communication unit 121 is connected to the Internet 200 via the router device 200r, and transmits / receives data to / from each server device and other communication devices on the Internet 200. In addition, the MMT data string (or a part thereof) of the program transmitted via the communication line shall be acquired. The connection with the router device 200r may be a wired connection or a wireless connection such as Wi-Fi (registered trademark). The LAN communication unit 121 is provided with a coding circuit, a decoding circuit, and the like. Further, the broadcast receiving device 100 may further include other communication units such as a Bluetooth (registered trademark) communication unit, an NFC communication unit, and an infrared communication unit.

The tuner / demodulation unit 131 receives the broadcast wave transmitted from the radio tower 300t via the antenna 100a, and tunes (selects) the channel of the service desired by the user based on the control of the main control unit 101. Further, the tuner / demodulation unit 131 demodulates the received broadcast signal to acquire the MMT data string. In the example shown in FIG. 7A, a configuration in which one tuner / demodulation unit is used is illustrated, but the broadcast receiving device 100 uses the tuner / demodulation unit for the purpose of simultaneous display of a plurality of screens, counterprogram recording, or the like. It may be configured to mount multiple devices.

The separation unit 132 is an MMT decoder, and based on the control signal in the input MMT data string, the video data string, the audio data string, the character super data string, the subtitle data string, etc., which are real-time presentation elements, are set to the video decoder 141. , Audio decoder 143, character super decoder 144, subtitle decoder 145, and the like. The data input to the separation unit 132 is an MMT data string transmitted via a broadcast transmission line and demodulated by the tuner / demodulation unit 131, or MMT data transmitted via a communication line and received by the LAN communication unit 121. It can be a line. Further, the separation unit 132 reproduces the multimedia application and the file system data which is a component thereof, and temporarily stores the file system data in the cache unit 152. Further, the separation unit 132 extracts general-purpose data and outputs it to the data decoder 151 in order to use it for streaming data to a data or application used by a player that presents data other than video / audio subtitles. Further, the separation unit 132 may perform error correction, access restriction control, and the like on the input MMT data string based on the control of the main control unit 101.

The video decoder 141 decodes the video data string input from the separation unit 132 and outputs the video information. The video color gamut conversion unit 142 performs color space conversion processing on the video information decoded by the video decoder 141 for the video composition processing by the video synthesis unit 161 as necessary. The voice decoder 143 decodes the voice data string input from the separation unit 132 and outputs the voice information. Further, even if streaming data such as MPEG-DASH (MPEG-Dynamic Adaptive Streaming over HTTP) format acquired from the Internet 200 via the LAN communication unit 121 is input to the video decoder 141 and the audio decoder 143. good. Further, a plurality of video decoder 141, video color gamut conversion unit 142, audio decoder 143, etc. may be provided in order to simultaneously decode a plurality of types of video data strings and audio data strings.

The character super decoder 144 decodes the character super data string input from the separation unit 132 and outputs the character super information. The subtitle decoder 145 decodes the subtitle data string input from the separation unit 132 and outputs the subtitle information. The character super information output from the character super decoder 144 and the subtitle information output from the subtitle decoder 145 are combined by the subtitle composition unit 146, and further, the subtitle color gamut conversion unit 147 is used by the video composition unit 161. Color space conversion processing is performed as necessary for the video composition processing. In this embodiment, among the services centered on character information presented at the same time as the video of the broadcast program, those related to the content of the video are referred to as subtitles, and the other services are referred to as character supermarkets. To do. In addition, when they are not distinguished, they are collectively referred to as subtitles.

The browser unit 154 inputs the multimedia application file acquired from the server device on the Internet 200 via the cache unit 152 or the LAN communication unit 121 and the file system data which is a component thereof to the control information and the LAN included in the MMT data string. It is presented according to the instruction of the application control unit 153 that interprets the control information acquired from the server device on the Internet 200 via the communication unit 121. The multimedia application file may be an HTML (Hyper Text Markup Language) document, a BML (Broadcast Markup Language) document, or the like. The application information output from the browser unit 154 is further subjected to color space conversion processing in the application color gamut conversion unit 155 for the video composition processing in the video composition unit 161 as necessary. Further, the browser unit 154 also reproduces the application voice information by acting on the sound source unit 156.

The video composition unit 161 inputs the video information output from the video color gamut conversion unit 142, the subtitle information output from the subtitle color gamut conversion unit 147, the application information output from the application color gamut conversion unit 155, and the like, and appropriately Performs processing such as selection and / or superimposition. The video synthesis unit 161 includes a video RAM (not shown), and the monitor unit 162 and the like are driven based on the video information and the like input to the video RAM. Further, the video synthesis unit 161 is an EPG (Electronic Program Guide) created based on information such as scaling processing and MH-EIT included in MMT-SI, if necessary, based on the control of the main control unit 101. Performs screen information superimposition processing and the like. The monitor unit 162 is, for example, a display device such as a liquid crystal panel, and provides the user of the broadcast receiving device 100 with video information selected and / or superimposed by the video synthesis unit 161. The video output unit 163 is a video output interface that outputs video information that has been selected and / or superposed by the video synthesis unit 161.

The presentation function of the broadcast receiving device 100 of the present embodiment is provided with a logical plane structure in order to display the multimedia service as intended by the provider. FIG. 7B shows an example of the configuration of the logical plane structure provided in the presentation function of the broadcast receiving device 100 of this embodiment. In the logical plane structure, the character super plane for displaying the character super is arranged in the foreground, and the subtitle plane for displaying the subtitle is arranged in the next layer. A multimedia plane for displaying broadcast video, a multimedia application, or a composite video thereof is placed on the third layer, and a background plane is placed on the backmost side. The subtitle synthesis unit 146 and the video composition unit 161 draw the character super information on the character super plane, draw the subtitle information on the subtitle plane, and draw the video information, application information, and the like on the multimedia plane. Further, the background color is drawn on the background plane based on the LCT or the like included in the MMT-SI. It is assumed that a plurality of third-layer multimedia planes can be prepared according to the number of video decoders 141. However, even when there are a plurality of multimedia planes, the application information and the like output from the application color gamut conversion unit 155 are output only to the foremost multimedia plane.

The voice synthesis unit 164 inputs the voice information output from the voice decoder 143 and the application voice information reproduced by the sound source unit 156, and appropriately selects and / or performs processing such as mixing. The speaker unit 165 provides the user of the broadcast receiving device 100 with the audio information selected and / or mixed by the speech synthesis unit 164. The voice output unit 166 is a voice output interface that outputs voice information that has been selected and / or mixed by the voice synthesis unit 164.

The expansion interface unit 124 is a group of interfaces for expanding the functions of the broadcast reception device 100, and in this embodiment, it is configured to include an analog video / audio interface, a USB (Universal Serial Bus) interface, a memory interface, and the like. To do. The analog video / audio interface inputs analog video / audio signals from an external video / audio output device, outputs analog video / audio signals to an external video / audio input device, and the like. The USB interface connects to a PC or the like to send and receive data. A HDD may be connected to record broadcast programs and contents. You may also connect a keyboard or other USB device. The memory interface connects a memory card or other memory medium to send and receive data.

The digital interface unit 125 is an interface for outputting or inputting encoded digital video data and / or digital audio data. The digital interface unit 125 can output the MMT data string obtained by demodulation by the tuner / demodulation unit 131, the MMT data string acquired via the LAN communication unit 121, or the mixed data of each MMT data string as it is. It shall be. Further, the MMT data string input from the digital interface unit 125 may be controlled to be input to the separation unit 132. The output of the digital content stored in the storage (storage) unit 110 or the storage of the digital content in the storage (storage) unit 110 may be performed via the digital interface unit 125.

The digital interface unit 125 is a DVI terminal, an HDMI (registered trademark) terminal, a DisplayPort (registered trademark) terminal, or the like, and data is output or input in a format compliant with the DVI specification, the HDMI specification, the DisplayPort specification, or the like. It may be something. It may be output or input in the form of serial data conforming to the IEEE1394 specifications and the like. Further, it may be configured as an IP interface that outputs a digital interface via hardware such as Ethernet (registered trademark) or wireless LAN. In this case, the digital interface unit 125 and the LAN communication unit 121 may share the hardware configuration.

The operation input unit 170 is an instruction input unit for inputting an operation instruction to the broadcast receiving device 100. In this embodiment, a remote controller receiving unit and a button switch for receiving a command transmitted from a remote controller (not shown) are arranged. It shall consist of operation keys. Only one of them may be used. Further, the operation input unit 170 may be replaced with a touch panel arranged on the monitor unit 162. A keyboard or the like connected to the expansion interface unit 124 may be used instead. The remote controller (not shown) may be replaced with a mobile information terminal 700 having a remote controller command transmission function.

As described above, when the broadcast receiving device 100 is a television receiver or the like, the video output unit 163 and the audio output unit 166 are not essential configurations in the present invention. Further, the broadcast receiving device 100 may be an optical disk drive recorder such as a DVD (Digital Versaille Disc) recorder, a magnetic disk drive recorder such as an HDD recorder, an STB (Set Top Box), or the like, in addition to a television receiver. It may be a PC (Personal Computer), a tablet terminal, a navigation device, a game machine, or the like having a digital broadcast reception function or a broadcast communication cooperation function. When the broadcast receiving device 100 is a DVD recorder, an HDD recorder, an STB, or the like, the monitor unit 162 and the speaker unit 165 may not be provided. By connecting an external monitor and an external speaker to the video output unit 163 and the audio output unit 166 or the digital interface unit 125, the same operation as that of the broadcast receiving device 100 of this embodiment can be performed.

[System configuration for clock synchronization / presentation synchronization of broadcast receiver]
FIG. 7C is an example of a system configuration of clock synchronization / presentation synchronization in the broadcasting system supported by the broadcasting receiving device 100 of this embodiment. In the broadcasting system of this embodiment, the UTC is transmitted from the broadcasting transmitting system to a receiver (such as the broadcasting receiving device 100 of this embodiment) in a 64-bit length NTP time stamp format. In the NTP time stamp format, "more than a second" of UTC is represented by 32 bits, and "less than a second" is represented by 32 bits. However, in reality, it is difficult to reproduce 1 second with 32-bit accuracy. Therefore, the system clock for synchronizing the video system and the system clock for operating the NTP format clock include, for example, "2 to the 24th power" Hz (about 16.8 MHz) as shown in the figure. ) May be used. Considering that the system clock in the conventional broadcasting system was 27 MHz and that the hardware configuration of the receiver can be easily constructed, the number of 2 is about "2 to the 24th power" to "2 to the 28th power". It is desirable to use the power frequency as the system clock.

When the system clock is set to a power frequency of 2 such as "2 to the 24th power" to "2 to the 28th power" as described above on the broadcast transmission system side or the receiver side, it is received from the broadcast transmission system side. In the NTP time stamp format transmitted to the machine side, the lower 8 to 4 bits that are not referred to by the PLL (Phase Locked Loop) system for reproducing the system clock or the NTP format clock are "0" or "1". It may be fixed to. That is, if the system clock is "2 to the nth power" Hz (n = 24 in the example of FIG. 7C), the lower "32-n" bit in the NTP time stamp format is fixed to "0" or "1". You may do so. Alternatively, the receiver may perform processing so as to ignore the lower "32-n" bits of the NTP time stamp format.

On the broadcast transmission system side, when the time information in NTP format is obtained from the outside, a PLL system is configured with a 32 + n-bit counter by a VCO (Voltage Controlled Oscillator) of "2 to the nth power" Hz, and the time information given from the outside is used. Realize a synchronous sending system clock. In addition, the entire signal processing system is operated in synchronization with the system clock of "2 to the nth power" Hz. Further, the output of the transmission system clock is periodically transmitted to the receiver side via the broadcast transmission line as NTP length format time information.

The receiver side receives the time information in the NTP length format via the broadcast transmission line, and reproduces the reception system clock by the PLL system based on the VCO of "2 to the nth power" Hz as in the broadcast transmission system side. As a result, the receiving system clock becomes a clock synchronized with the broadcasting transmitting system side. In addition, by operating the signal processing system of the receiver in synchronization with the system clock of "2 to the nth power" Hz, clock synchronization between the broadcast transmission system side and the receiver side is realized, and stable signal reproduction is possible. Become. Further, the decoding time and the presentation time for each presentation unit of the video / audio signal are set on the broadcast transmission system side based on the time information in the NTP format. Here, the MPT stored in the PA message transmitted by the broadcast signal stores the MPU time stamp descriptor shown in FIG. 13B described later. In the MPU time stamp descriptor of FIG. 13B, the "mpu_sequence_number (MPU sequence number)" parameter indicates the sequence number of the MPU that describes the time stamp, and the "mpu_presentation_time (MPU presentation time)" parameter indicates the MPU presentation time as 64-bit NTP. It is shown in time stamp format. Therefore, the receiver can refer to the MPU time stamp descriptor stored in the MPT and control the presentation (display, output, etc.) timing of each MPU such as video signal, audio signal, subtitle, and character superimpose. ..

When focusing on the decoding timing and the control of the presentation timing for each presentation unit of the video / audio signal or the like described above, the video / audio signal is synchronized even with a clock of about "2 to the 16th power" Hz (about 65.5 KHz). Can be secured. In this case, the lower 16 bits of the NTP time stamp format described in the MPU time stamp descriptor or the like need not be referred to. That is, when a "2 m power" Hz clock generated by dividing the system clock or the like is used to control the decoding timing and the presentation timing, it is lower than the NTP time stamp format described in the MPU time stamp descriptor or the like. The "32-m" bit does not have to be referenced. Therefore, the lower "32-m" bit of the NTP time stamp format described in the MPU time stamp descriptor or the like may be fixed to "0" or "1".

[Software configuration of broadcast receiver]
FIG. 7D is a software configuration diagram of the broadcast receiving device 100 of this embodiment, and shows the software configuration of the ROM 103, the RAM 104, and the storage (storage) unit 110. In this embodiment, the basic operation program 1001 and other operation programs are stored in the ROM 103, and the reception function program 1002 and other operation programs are stored in the storage (storage) unit 110. Further, the storage (storage) unit 110 is an authentication that stores a content storage area 1200 that stores contents such as moving images, still images, and sounds, and authentication information that is required when accessing an external mobile terminal device or each server device. It is assumed to include an information storage area 1300 and various information storage areas for storing various other information.

The basic operation program 1001 stored in the ROM 103 is expanded in the RAM 104, and the main control unit 101 further executes the expanded basic operation program to form the basic operation execution unit 1101. Further, the reception function program 1002 stored in the storage (storage) unit 110 is also expanded in the RAM 104, and the main control unit 101 further executes the expanded reception function program to configure the reception function execution unit 1102. To do. Further, the RAM 104 is provided with a temporary storage area for temporarily holding the data created at the time of executing each operation program as needed.

In the following, in order to simplify the explanation, the main control unit 101 performs a process of controlling each operation block by expanding the basic operation program 1001 stored in the ROM 103 into the RAM 104 and executing the basic operation. It is described as assuming that the unit 1101 controls each operation block. The same description is made for other operation programs.

The reception function execution unit 1102 controls each operation block of the broadcast reception device 100 in order to reproduce components such as video and audio transmitted by the broadcast system of this embodiment. In particular, the transport processing unit 1102a mainly controls the MMT decoder function of the separation unit 132, and distributes the video data string, the audio data string, and the like separated from the MMT data string to the corresponding decoding processing units. The AV decoding processing unit 1102b mainly controls the video decoder 141, the audio decoder 143, and the like. The application processing unit 1102c mainly controls the cache unit 152, the application control unit 153, the browser unit 154, and the sound source unit 156. The character super processing unit 1102d mainly controls the character super decoder 144. The subtitle processing unit 1102e mainly controls the subtitle decoder 145. The general-purpose data processing unit 1102f mainly controls the data decoder 151. The EPG generation unit 1102g interprets the description contents such as MH-EIT included in the MMT-SI to generate the EPG screen. Based on the logical plane structure, the presentation processing unit 1102h includes a video color gamut conversion unit 142, a subtitle synthesis unit 146, a subtitle color gamut conversion unit 147, an application color gamut conversion unit 155, a video synthesis unit 161 and a voice synthesis unit 164. Is mainly controlled.

Each of the operation programs may be stored in the ROM 103 and / or the storage (storage) unit 110 in advance at the time of product shipment. After the product is shipped, it may be acquired from another application server 500 or the like on the Internet 200 via the LAN communication unit 121. Further, each operation program stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 124 or the like.

[Broadcasting station server configuration]
FIG. 8 is a block diagram showing an example of the internal configuration of the broadcasting station server 300. The broadcasting station server 300 is composed of a main control unit 301, a system bus 302, a RAM 304, a storage unit 310, a LAN communication unit 321 and a digital broadcasting signal transmission unit 360.

The main control unit 301 is a microprocessor unit that controls the entire broadcasting station server 300 according to a predetermined operation program. The system bus 302 is a data communication path for transmitting and receiving data between the main control unit 301 and each operation block in the broadcasting station server 300. The RAM 304 serves as a work area when each operation program is executed.

The storage unit 310 stores the basic operation program 3001, the broadcast content management / distribution program 3002, and the broadcast content transmission program 3003, and further includes a broadcast content storage area 3200 and a metadata storage area 3300. The broadcast content storage area 3200 stores program contents and the like of each broadcast program broadcast by the broadcasting station. The metadata storage area 3300 stores metadata such as a program title, a program ID, a program outline, a performer, a broadcast date and time, and copy control information related to each program content of each broadcast program.

Further, the basic operation program 3001 and the broadcast content management / distribution program 3002 and the broadcast content transmission program 3003 stored in the storage unit 310 are each expanded in the RAM 304, and the main control unit 301 further executes each of the expanded programs. As a result, the basic operation execution unit 3101, the broadcast content management / distribution execution unit 3102, and the broadcast content transmission execution unit 3103 are configured.

In the following, in order to simplify the explanation, the process of controlling each operation block by the main control unit 301 expanding the basic operation program 3001 stored in the storage unit 310 into the RAM 304 and executing the program is basically performed. It is described as assuming that the operation execution unit 3101 controls each operation block. The same description is made for other operation programs.

The broadcast content management / distribution execution unit 3102 manages the program content and the like of each broadcast program and each metadata stored in the broadcast content storage area 3200 and the metadata storage area 3300, and the program content and the like of each broadcast program and each. Controls the provision of metadata to service providers based on contracts. Further, when the broadcast content management / distribution execution unit 3102 provides the program content and the like of each broadcast program and each metadata to the service provider, the service provider based on the contract is required. The authentication process of the server 400 may be performed.

The broadcast content transmission execution unit 3103 stores the program content of the broadcast program stored in the broadcast content storage area 3200, the program title of the broadcast program stored in the metadata storage area 3300, the program ID, the copy control information of the program content, and the like. Time schedule management and the like when transmitting the included MMT data string from the radio tower 300t via the digital broadcast signal transmission unit 360 is performed.

The LAN communication unit 321 is connected to the Internet 200 and communicates with the service provider server 400 or the like on the Internet 200. The LAN communication unit 321 is provided with a coding circuit, a decoding circuit, and the like. The digital broadcast signal transmission unit 360 modulates an MMT data string composed of a video data string, an audio data string, a program information data string, etc. of the program content of each broadcast program stored in the broadcast content storage area 3200. , It is transmitted as a digital broadcast wave via the radio tower 300t.

[Service provider server configuration]
FIG. 9 is a block diagram showing an example of the internal configuration of the service provider server 400. The service provider server 400 is composed of a main control unit 401, a system bus 402, a RAM 404, a storage unit 410, and a LAN communication unit 421.

The main control unit 401 is a microprocessor unit that controls the entire service provider server 400 according to a predetermined operation program. The system bus 402 is a data communication path for transmitting and receiving data between the main control unit 401 and each operation block in the service provider server 400. The RAM 404 serves as a work area when each operation program is executed.

The storage unit 410 stores the basic operation program 4001, the video content management / distribution program 4002, and the application management / distribution program 4004, and further stores the video content storage area 4200, the metadata storage area 4300, the application storage area 4400, and the user information storage. It includes a region 4500. The video content storage area 4200 stores the program content of the broadcast program provided by the broadcasting station server 300 as video content. It also stores video content and the like produced by the service provider. The metadata storage area 4300 stores each metadata provided by the broadcasting station server 300, metadata related to the video content produced by the service provider, and the like. The application storage area 4400 stores various applications and the like for realizing a service linked to a broadcast program for distribution in response to a request from each television receiver. The user information storage area 4500 stores information (personal information, authentication information, etc.) about a user who is permitted to access the service provider server 400.

Further, the basic operation program 4001 and the video content management / distribution program 4002 and the application management / distribution program 4004 stored in the storage unit 410 are expanded in the RAM 404, respectively, and the main control unit 401 further expands the expanded basic operation program and the video. By executing the content management / distribution program and the application management / distribution program, the basic operation execution unit 4101, the video content management / distribution execution unit 4102, and the application management / distribution execution unit 4104 are configured.

In the following, in order to simplify the explanation, the main control unit 401 controls each operation block by expanding and executing the basic operation program 4001 stored in the storage unit 410 in the RAM 404. It is described as assuming that the operation execution unit 4101 controls each operation block. The same description is made for other operation programs.

The video content management / distribution execution unit 4102 acquires program contents and metadata of broadcast programs from the broadcasting station server 300, video contents and the like stored in the video content storage area 4200 and the metadata storage area 4300, and each metadata. And control the distribution of the video content and each metadata to each TV receiver. Further, the video content management / distribution execution unit 4102 performs authentication processing of each television receiver and the like as necessary when distributing the video content and the metadata to the television receivers. You may go. In addition, the application management / distribution execution unit 4104 manages each application stored in the application storage area 4400 and controls when the application is distributed in response to a request from each television receiver. Further, the application management / distribution execution unit 4104 may perform authentication processing of each television receiver as necessary when distributing each application to the television receivers.

The LAN communication unit 421 is connected to the Internet 200 and communicates with the broadcast receiving device 100 via the broadcasting station server 300 on the Internet 200 and the router device 200r. The LAN communication unit 421 is provided with a coding circuit, a decoding circuit, and the like.

[Hardware configuration of mobile information terminal]
FIG. 10A is a block diagram showing an example of the internal configuration of the mobile information terminal 700. The mobile information terminal 700 includes a main control unit 701, a system bus 702, a ROM 703, a RAM 704, a storage unit 710, a communication processing unit 720, an expansion interface unit 724, an operation unit 730, an image processing unit 740, a voice processing unit 750, and a sensor unit 760. Consists of ,.

The main control unit 701 is a microprocessor unit that controls the entire mobile information terminal 700 according to a predetermined operation program. The system bus 702 is a data communication path for transmitting and receiving data between the main control unit 701 and each operation block in the personal digital assistant 700.

The ROM 703 is a memory in which a basic operation program such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM or a flash ROM is used. The RAM 704 serves as a work area for executing a basic operation program and other operation programs. The ROM 703 and the RAM 704 may be integrated with the main control unit 701. Further, the ROM 703 may not have an independent configuration as shown in FIG. 10A, but may use a partial storage area in the storage unit 710.

The storage unit 710 stores the operation program and operation setting value of the mobile information terminal 700, the personal information of the user of the mobile information terminal 700, and the like. In addition, an operation program downloaded via the Internet 200 and various data created by the operation program can be stored. In addition, contents such as moving images, still images, and sounds downloaded via the Internet 200 can also be stored. A part of the function of the ROM 703 may be replaced by a part of the storage unit 710. Further, the storage unit 710 needs to hold the stored information even when the mobile information terminal 700 is not supplied with power from the outside. Therefore, for example, devices such as non-volatile semiconductor device memory such as flash ROM and SSD, magnetic disk drive such as HDD, and the like are used.

It is assumed that each of the operation programs stored in the ROM 703 and the storage unit 710 can be added, updated, and expanded in function by a download process from each server device on the Internet 200.

The communication processing unit 720 is composed of a LAN communication unit 721, a mobile telephone network communication unit 722, and an NFC communication unit 723. The LAN communication unit 721 is connected to the Internet 200 via the router device 200r and the access point 200a, and transmits / receives data to / from each server device and other communication devices on the Internet 200. The connection with the router device 200r and the access point 200a shall be made by wireless connection such as Wi-Fi (registered trademark). The mobile telephone network communication unit 722 performs telephone communication (call) and data transmission / reception by wireless communication with the base station 600b of the mobile telephone communication network. The NFC communication unit 723 performs wireless communication when it is in close proximity to the corresponding reader / writer. The LAN communication unit 721, the mobile telephone network communication unit 722, and the NFC communication unit 723 shall each include a code circuit, a decoding circuit, an antenna, and the like. Further, the communication processing unit 720 may further include other communication units such as a Bluetooth (registered trademark) communication unit and an infrared communication unit.

The expansion interface unit 724 is a group of interfaces for expanding the functions of the mobile information terminal 700, and in this embodiment, it is composed of a video / audio interface, a USB interface, a memory interface, and the like. The video / audio interface inputs video / audio signals from an external video / audio output device, outputs video / audio signals to an external video / audio input device, and the like. The USB interface connects to a PC or the like to send and receive data. You may also connect a keyboard or other USB device. The memory interface connects a memory card or other memory medium to send and receive data.

The operation unit 730 is an instruction input unit for inputting operation instructions to the mobile information terminal 700. In this embodiment, the operation unit 730 is composed of a touch panel 730t arranged on the display unit 741 and an operation key 730k in which button switches are arranged. It shall be. Only one of them may be used. The mobile information terminal 700 may be operated by using a keyboard or the like connected to the extended interface unit 724. The mobile information terminal 700 may be operated by using a separate terminal device connected by wired communication or wireless communication. That is, the mobile information terminal 700 may be operated from the broadcast receiving device 100. Further, the touch panel function may be provided in the display unit 741.

The image processing unit 740 includes a display unit 741, an image signal processing unit 742, a first image input unit 743, and a second image input unit 744. The display unit 741 is, for example, a display device such as a liquid crystal panel, and provides the user of the mobile information terminal 700 with the image data processed by the image signal processing unit 742. The image signal processing unit 742 includes a video RAM (not shown), and the display unit 741 is driven based on the image data input to the video RAM. Further, the image signal processing unit 742 shall have a function of performing format conversion, menu and other OSD (On Screen Display) signal superimposition processing, etc., as necessary. The first image input unit 743 and the second image input unit 744 convert the light input from the lens into an electric signal by using an electronic device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Sensor) sensor. , A camera unit that inputs image data of surroundings and objects.

The voice processing unit 750 is composed of a voice output unit 751, a voice signal processing unit 752, and a voice input unit 753. The voice output unit 751 is a speaker, and provides the user of the mobile information terminal 700 with the voice signal processed by the voice signal processing unit 752. The voice input unit 753 is a microphone, which converts a user's voice or the like into voice data and inputs it.

The sensor unit 760 is a group of sensors for detecting the state of the portable information terminal 700. In this embodiment, the GPS receiving unit 761, the gyro sensor 762, the geomagnetic sensor 763, the acceleration sensor 764, the illuminance sensor 765, and the proximity sensor 766 are used. Consists of ,. With these sensor groups, it is possible to detect the position, tilt, direction, movement, ambient brightness, proximity status of surrounding objects, and the like of the portable information terminal 700. Further, the portable information terminal 700 may further include other sensors such as a barometric pressure sensor.

The mobile information terminal 700 may be a mobile phone, a smart phone, a tablet terminal, or the like. It may be a PDA (Personal Digital Assistants) or a notebook PC. Further, it may be a digital still camera, a video camera capable of shooting a moving image, a portable game machine, a navigation device, or other portable digital device.

The configuration example of the mobile information terminal 700 shown in FIG. 10A includes many configurations that are not essential to this embodiment, such as the sensor unit 760, but the present embodiment even if the configuration is not provided with these. Does not impair the effect of. Further, configurations (not shown) such as a digital broadcast reception function and an electronic money payment function may be further added.

[Software configuration of mobile information terminal]
FIG. 10B is a software configuration diagram of the mobile information terminal 700 of this embodiment, and shows the software configuration of the ROM 703, the RAM 704, and the storage unit 710. In this embodiment, the basic operation program 7001 and other operation programs are stored in the ROM 703, and the cooperation control program 7002 and other operation programs are stored in the storage unit 710. Further, the storage unit 710 includes a content storage area 7200 for storing contents such as moving images, still images, and sounds, and an authentication information storage area 7300 for storing authentication information and the like required for accessing a TV receiver and each server device. It shall be provided with various information storage areas for storing various other information.

The basic operation program 7001 stored in the ROM 703 is expanded in the RAM 704, and the main control unit 701 further executes the expanded basic operation program to form the basic operation execution unit 7101. Further, the cooperation control program 7002 stored in the storage unit 710 is also expanded in the RAM 704, and the main control unit 701 executes the expanded cooperation control program to form the cooperation control execution unit 7102. Further, the RAM 704 is provided with a temporary storage area for temporarily holding the data created at the time of executing each operation program as needed.

In the following, in order to simplify the explanation, the main control unit 701 expands the basic operation program 7001 stored in the ROM 703 into the RAM 704 and executes it to control each operation block. It is described as assuming that the unit 7101 controls each operation block. The same description is made for other operation programs.

The cooperation control execution unit 7102 manages device authentication and connection, transmission / reception of each data, and the like when the mobile information terminal 700 performs a linked operation with the television receiver. Further, the cooperation control execution unit 7102 is provided with a browser engine function for executing an application linked with the television receiver.

Each of the operation programs may be stored in the ROM 703 and / or the storage unit 710 in advance at the time of product shipment. After the product is shipped, it may be acquired from another application server 500 or the like on the Internet 200 via the LAN communication unit 721 or the mobile telephone network communication unit 722. Further, each of the operation programs stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 724 or the like.

[Time management of broadcast receiver]
The broadcast receiving device of this embodiment has two types of time management functions. The first time management function is an NTP-based time management function, which has already been described with reference to FIG. 7C. The second time management function is a time management function based on MH-TOT, which is a time managed based on the time information transmitted by MH-TOT described with reference to FIG. 6B.

FIG. 13A shows an example of the configuration of time information transmitted by NTP. Further, an example of the data structure of the MPU time stamp descriptor is shown in FIG. 13B. The "reference_timestamp" parameter, "transmit_timestamp" parameter, etc. in the NTP format are time data in the NTP length format having a length of 64 bits, and the "mpu_presentation_time" parameter in the MPU time stamp descriptor is also a NTP time stamp having a length of 64 bits. It is the time data in the format. The NTP length format time data and the NTP time stamp format time data are data in which "seconds or more" of UTC is represented by 32 bits and "less than seconds" is represented by 32 bits. That is, the time information in the NTP format can transmit the time information up to "less than a second". Further, since the time information in the NTP format is expressed in UTC, unlike the clock management in the conventional digital broadcasting, as shown in FIG. 3B, the communication that can be received by the communication line path (for example, the LAN communication unit 121 in FIG. 7A). It can also be matched with the NTP included in the signal received by the line).

On the other hand, the information transmitted by MH-TOT is as follows. It is assumed that the broadcast receiving device 100 can acquire the current date and the Japanese standard time by MH-TOT. FIG. 11A shows an example of the data structure of MH-TOT. The broadcast receiving device 100 can acquire the current date and the current time from the "JST_time" parameter of the MH-TOT. As shown in FIG. 11B, the "JST_time" parameter has the lower 16 bits of the coded data of the current date by the modified Julian Date (MJD) and the Japanese standard time (Japan Standard Time: JST) of 6 4 It is assumed to include 24-bit information represented by Bit Binary-Coded Decimal (BCD). The current date can be calculated by performing a predetermined operation on the 16-bit coded data of the MJD. The 6 4-bit 2-evolved decimal numbers represent "hours" in 2 decimal digits by 2 4-bit 2-evolved decimal numbers, and the following 2 4-bit 2-evolved decimal numbers represent decimal 2 The digits represent "minutes", and the last two 4-bit 2-evolved decimal numbers represent "seconds" in two decimal digits.

Therefore, the difference between the time based on NTP and the time based on MH-TOT is the information in UTC notation in which the former NTP can transmit time information up to "less than a second" as described above, whereas MH- The information transmitted by TOT is information up to "seconds" in JST notation.

The broadcast receiving device 100 of the present embodiment uses the time management function based on NTP, which is the time information in UTC notation, to decode and display the video, audio, subtitles, character super, and other presented data which are the contents of the broadcast signal. By using the above, more accurate synchronization processing can be realized. Furthermore, by referring to the information in the UTC notation instead of the clock notation of the broadcasting station, the video, audio, subtitles, character supermarkets, or other data that are the contents of the broadcasting signal received in the broadcasting signal are acquired by the communication line path. It is also possible to perform decoding and display synchronization processing with video, audio, subtitles, character supervision, or other data.

Further, the broadcast receiving device of this embodiment presents the current time to the user with a time management function based on "JST_time" including 24-bit information represented by 6 4-bit binary coded decimal numbers of MH-TOT. It may be used for each process or each process for handling the MH-event information table (MH-EIT) described with reference to FIG. 6B. In general, in the process of presenting the current time to the user in the broadcast receiving device, accuracy of less than a second is rarely required. In addition, each time information described in the MH-event information table (MH-EIT) is represented by 6 4-bit binary coded decimal numbers, as in the case of the conventional digital broadcast EIT transmitted by the MPEG2-TS method. The 24-bit information is stored in "hours", "minutes", and "seconds" in two decimal digits. Therefore, the time management function based on MH-TOT in the broadcast receiving device 100 of this embodiment is easy to match with the process using MH-EIT. Specifically, the process using MH-EIT includes a program table generation process (described later), control of recording reservation and viewing reservation, and copyright management processing such as temporary storage. This is because accuracy of less than seconds is rarely required for any of the processes, and accuracy of 1 second unit is sufficient.

In addition, the generation process of the program guide, the control of recording reservation and viewing reservation, and the copyright management process such as temporary storage are functions that are also installed in the receiver of the digital broadcasting system using the conventional MPEG2-TS method. .. Then, also in the broadcasting system of this embodiment, in the processing such as the generation processing of the program guide, the control of recording reservation and viewing reservation, and the copyright management processing such as temporary storage, the conventional MPEG2-TS system digital broadcasting system is used. If it is configured so that it can be handled by consistent time management processing, it constitutes a broadcast receiving device having both a conventional MPEG2-TS system digital broadcast receiving function and an MMT system digital broadcast receiving function. At that time, in these processes (processing such as program guide generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage), it is not necessary to design processing algorithms separately, and the cost is low. can do.

Further, even if the receiver does not have the conventional MPEG2-TS system digital broadcast reception function but only the MMT system digital broadcast reception function, it can generate a program guide, control recording reservation and viewing reservation, and so on. Even if you do not create a completely new algorithm for processing such as copyright management processing such as temporary storage, you can use the algorithm of the function installed in the receiver of the digital broadcasting system using the conventional MPEG2-TS method. It can be developed at a lower cost.

Therefore, a configuration in which the time management function based on the "JST_time" parameter of MH-TOT is used for these processes (processing such as program guide generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage). By doing so, even a broadcast receiving device for MMT type digital broadcasting can be provided at a lower cost by improving the consistency with the conventional type broadcasting system.

As described above, the broadcast receiving device 100 of the present embodiment has a time management function using two types of time information having different accuracy. One time information is notation time information consistent with the conventional digital broadcasting system, the other time information is time information having a higher resolution than the one time information, and the latter time information is the broadcast signal. By using it for synchronization processing of each content data, more advanced information presentation processing than the conventional broadcasting system is realized, and the former time information is used for program guide generation processing, recording reservation and viewing reservation control, temporary storage, etc. A broadcast receiving device can be provided at low cost by using it for rights management processing and the like.

Therefore, the broadcast receiving device 100 of the present embodiment can achieve both the realization of more advanced information presentation processing and the cost reduction by providing the two types of time management functions described above.

[First modification of time management]
Next, a first modification of time management in the broadcasting system of this embodiment will be described below.

In the first modification, in order to improve the accuracy of the management time of the NTP-based time management function already described with reference to FIG. 7C, the time management server (not shown) or the broadcasting station server 300 to the broadcasting receiving device 100 Information on the estimated delay time in the time information transmission of the above is included in the broadcast signal and transmitted, and the broadcast receiving device 100 is configured to use the information on the estimated delay time to correct the system clock of the time management function based on NTP. Is also good.

At this time, the information regarding the assumed delay time may be transmitted not in the TLV multiplexing stream shown in FIG. 3A but in the TMCC (Transmission and Multiplexing Configuration Control) region outside the TLV multiplexing stream. good. If the transmission is performed within the TMCC region, the broadcast receiving device 100 can extract information on the assumed delay time without going through the TLV multiplexed stream separation processing (demax processing). That is, it is possible to acquire information that is not easily affected by the delay due to the separation process in the broadcast receiving device 100, and therefore, it is possible to perform a highly accurate correction process of the system clock. An example of the data structure of the time information transmitted by the TMCC signal will be described with reference to FIG. 13C. The time information may be stored in the TMCC extended information area and transmitted, for example. In the time information of the TMCC extended information area shown in FIG. 13C, the "delta" parameter sets an estimated value of transmission delay from the time management server that distributes UTC or the server device that creates the TMCC signal to a general broadcast receiving device in 32 bits. Represented by the signed fixed-point of. The upper 16 bits describe the integer part, and the lower 16 bits describe the decimal point. The "transmit_timestamp" parameter is a transmission time stamp, and describes the time when the TMCC signal is transmitted from the server device in the NTP time stamp length format. The upper 32 bits represent the integer part, and the lower 32 bits represent the decimal point.

In the first modification, the broadcast receiving device 100 of the present embodiment stores the information related to the estimated delay time described in the time information transmitted in the TMCC extended information area (for example, the above-mentioned "delta"). The system clock of the NTP-based time management function used for the synchronization processing of each content data of the broadcast signal can be corrected with higher accuracy by using the parameter and / or the "transmission_time stamp" parameter).

[Second variant of time management]
Next, a second modification of time management in the broadcasting system of this embodiment will be described below.

As described above, the broadcast receiving device 100 of the present embodiment has a time management function of acquiring the current date and the Japanese standard time from the information transmitted by the MH-TOT and managing the time. The current date and the Japanese standard time acquired from the information transmitted by the MH-TOT are superimposed on the video information, application information, etc. by the video synthesis unit 161 of the broadcast receiving device 100, and thereby on the monitor unit 162 and the video output unit 163. It can be output and provided to the user. As described above, the MH-TOT has the data structure shown in FIG. 11A, and the broadcast receiving device 100 can acquire the current date and the current time from the “JST_time” parameter of the MH-TOT.

However, since only the lower 16 bits of the MJD encoded data are used in the above-mentioned "JST_time" parameter, digit overflow will occur on "April 22, 2038", and the predetermined calculation will occur. It is not possible to express the date after "April 23, 2038" by itself. Therefore, in the second modification of this embodiment, the date after "April 23, 2038" is expressed by switching the calculation method between the case where the value of MJD is equal to or more than the predetermined value and the case where the value is less than the predetermined value. It shall be controlled so that it can be done.

FIG. 12 shows an example of a first calculation method used when the value of MJD is equal to or more than a predetermined value and a second calculation method used when the value of MJD is less than a predetermined value. For example, when the predetermined value is "32768 (0x8000)", the current date is calculated using the first calculation method when the MJD is "32768" or more, and when the MJD is less than "32768". Calculates the current date using the second calculation method. The case where the MJD is less than "32768" is equivalent to the case where the most significant bit of the 16-bit data of the MJD is "0". As a result, in the broadcast receiving device 100 of this embodiment, it is possible to express the date after "April 23, 2038". However, the predetermined value can be arbitrarily set, and the predetermined value may be set to "16384 (0x4000)", "49152 (0xC000)", or the like. The switching condition of the calculation method may be that the upper 2 bits of the 16-bit data of the MJD are "00" and the upper 2 bits of the 16-bit data of the MJD are not "11". If the above-mentioned means is used with the predetermined value set to "32768", the date before "September 4, 1948" cannot be expressed, but there is no particular problem in practical use as a television receiver. ..

Further, instead of switching between the first calculation method and the second calculation method according to the comparison result between the MJD and the predetermined value, the "reserved" parameter in the MH-TOT data structure shown in FIG. 11A The first calculation method and the second calculation method may be switched according to a flag in which a part or all is replaced or a newly added flag. For example, the flag is set to "1" if the most significant bit of the 16-bit encoded data of the MJD is "0" and the MJD indicates "April 23, 2038" or later. However, if it does not indicate "April 23, 2038" or later, "0" may be set. Then, when the flag is "1", the second calculation method shown in FIG. 12 may be used, and when the flag is "0", the first calculation method may be used. Alternatively, a new descriptor having the same meaning as the flag may be newly prepared and placed in the MH-TOT.

Further, in the broadcasting system of this embodiment, as described above, the absolute time in NTP format is transmitted, and the broadcasting receiving device 100 of this embodiment has a time management function based on the NTP. Further, in the broadcast receiving device 100 of the present embodiment, the decoding timing and presentation for each presentation unit of the video / audio signal are referred to by referring to the NTP time stamp or the like described in the MPU time stamp descriptor set for each MPU unit. The timing is controlled. As described above, the NTP format time information has the configuration shown in FIG. 13A. Further, the MPU time stamp descriptor has the configuration shown in FIG. 13B.

Therefore, in the broadcast receiving device 100 of the present embodiment, the "reference_time stamp" parameter, the "transmit_time stamp" parameter, the "mpu_presentation_time" parameter, or the like is referred to, and the above-mentioned first is performed according to the value of the referenced time data or the like. You may choose whether to use one calculation method or the second calculation method. That is, for example, when the most significant bit of the 64-bit length NTP length format time data is "0", the second calculation method is used, and when it is not "0", the first calculation method is used. And so on.

By any of the above methods, the broadcast receiving device 100 of the present embodiment can express the date after "April 23, 2038".

[Broadcast receiver channel selection process (initial scan)]
The AMT of the broadcasting system of this embodiment provides a list of multicast groups of IP packets for receiving IP packets transmitted by the TLV multiplexing method as indistinguishably as possible from IP packets transmitted on a communication line. It shall be. A plurality of IP multicast groups can be listed for one service identification. In addition, an address mask can be used to efficiently describe consecutive IP addresses.

In the broadcast receiving device 100 of this embodiment, a list of services acquired from TLV-NIT at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change is displayed in a non-volatile memory such as ROM 103 or storage unit 110. It is possible to store the list of IP multicast groups corresponding to the respective services as IP-related information in the non-volatile memory in association with the respective services. To do. By storing the list of services and IP-related information in the non-volatile memory so that they can be referred to at all times, it is not necessary to reacquire TLV-NIT and AMT when switching channels, etc., and the acquisition of broadcast contents is efficient. It becomes possible to do.

FIG. 14 is a diagram showing an example of an operation sequence at the time of channel scan (rescan) in the broadcast receiving device 100 of this embodiment.

When the channel scan is started, the reception function execution unit 1102 instructs the tuner / demodulation unit 131 to set the frequency initial value and tune to the frequency value (S101). When the tuner / demodulation unit 131 succeeds in locking to the set frequency value (S102: Yes), the reception function execution unit 1102 then acquires the TLV-NIT from the received signal (S103).

When the TLV-NIT acquired in the process of S103 is valid data (S104: Yes), the reception function executing unit 1102 acquires information such as the TLV stream ID and the original network ID from the acquired TLV-NIT. (S105). FIG. 15A shows an example of the data structure of TLV-NIT. It is assumed that the information of the TLV stream ID can be obtained from the "tlv_stream_id" parameter, and the information of the original network ID can be obtained from the "original_newwork_id" parameter. Further, the distribution system information regarding the physical conditions of the broadcast transmission line corresponding to each TLV stream ID / original network ID is acquired from the distribution system descriptor (S106), and the list of service IDs is acquired from the service list descriptor (S106). S107). FIG. 15B shows an example of the data structure of the satellite distribution system descriptor. FIG. 15C shows an example of the data structure of the service list descriptor. If the TLV-NIT has a plurality of different data such as the TLV stream ID, the original network ID, the distribution system information, the list of service IDs, and the like, the processes of S105 to S107 are repeated. Next, the reception function execution unit 1102 creates a service list based on data such as the TLV stream ID, the original network ID, the distribution system information, and the list of service IDs acquired in the processes of S105 to S107, and the service list is created. The service list is stored in the ROM 103, the storage unit 110, or the like (updated at the time of rescanning) (S108).

Next, the reception function execution unit 1102 acquires the AMT from the received signal (S109), and further acquires a list of IP multicast groups related to each service ID stored in the service list (S110). FIG. 15D shows an example of the data structure of AMT. If the AMT has a list of IP multicast groups related to a plurality of service IDs, the process of S110 is repeated. When there are a plurality of AMTs having a list of IP multicast groups related to different service IDs, the processes of S109 to S110 are repeated. Next, the reception function execution unit 1102 stores the list of IP multicast groups acquired in the process of S110 as IP-related information in the ROM 103, the storage unit 110, or the like in association with the service ID (updated at the time of rescanning). (S111).

When the tuner / demodulation unit 131 does not succeed in locking to the set frequency value in the processing of S102 (S102: No), and the TLV-NIT acquired in the processing of S103 is not valid data. In the case (S104: No), the processing of S105 to S111 is not performed.

When the processing of S111 is completed, the reception function executing unit 1102 ends the processing if the frequency value set in the tuner / demodulation unit 131 is the final frequency value of the channel scan range (S112: Yes). On the other hand, if the set frequency value is not the final frequency value of the channel scan range (S112: No), the frequency value set in the tuner / demodulation unit 131 is increased (S113), and the processes of S102 to S111 are performed. repeat. If one TLV-NIT can acquire service IDs related to all services constituting the broadcasting network, and can further acquire an AMT having a list of IP multicast groups related to the service IDs, S112 to S113. No processing is required.

By the series of processes described above, the broadcast receiving device 100 of the present embodiment has a list of services (service list) constituting the broadcast network at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change. At the same time as the creation / update, a list of IP multicast groups (IP-related information) corresponding to each of the services can be created / updated and further stored in a non-volatile memory such as the ROM 103 or the storage unit 110.

By referring to the "version_number" parameter of TLV-NIT or AMT, the rescan for changing the setting is automatically performed when it is detected that the information in the table has changed. You may. When a change in one of the "version_number" parameters of TLV-NIT and AMT is detected, only the information about the table in which the change in the parameter is detected may be automatically updated. However, when the above-mentioned automatic update is performed, it is desirable to notify the user that the rescan is automatically performed. Further, the user may be notified that the information in the table has changed, and the user may be allowed to select whether or not to perform the rescan.

[Broadcast receiver channel selection process (channel switching)]
FIG. 16 is a diagram showing an example of an operation sequence at the time of channel selection (channel switching) in the broadcast receiving device 100 of this embodiment.

When the user operates a remote controller or the like (not shown) to instruct channel switching, the reception function executing unit 1102 interprets the command transmitted from the remote controller and specifies the service ID of the target service (S201). Next, the reception function execution unit 1102 starts acquiring AMT from the reception signal of the tuner / demodulation unit 131. When the acquisition of the AMT is successful within a predetermined time (S202: Yes), the information regarding the list of IP multicast groups corresponding to the service ID is acquired from the acquired AMT (S204). On the other hand, if the acquisition of AMT is not successful within a predetermined time (S202: No), the IP corresponding to the service ID can be obtained by referring to the IP-related information stored in the ROM 103 or the storage unit 110 (S203). Acquire information about the list of multicast groups (S204). Note that the IP-related information stored in the ROM 103, the storage unit 110, or the like may always be referred to without performing the determination process of S202.

Next, the reception function execution unit 1102 starts acquiring the TLV-NIT from the reception signal of the tuner / demodulation unit 131. When the acquisition of the TLV-NIT is successful within a predetermined time (S205: Yes), the distribution system information for acquiring the IP data flow corresponding to the service ID is acquired from the acquired TLV-NIT (S207). On the other hand, when the acquisition of TLV-NIT is not successful within a predetermined time (S205: No), the service ID is supported by referring to the service list stored in the ROM 103 or the storage unit 110 (S206). The distribution system information for acquiring the IP data flow is acquired (S207). It should be noted that the determination process of S205 may not be performed, and the service list stored in the ROM 103, the storage unit 110, or the like may always be referred to. When the distribution system information is acquired in the process of S207, the reception function execution unit 1102 then controls the tuner / demodulation unit 131 with the frequency value indicated by the acquired distribution system information, and the service ID. The IP data flow corresponding to (S208) is received, the MMT data string is extracted from the received IP data flow, and is output to the separation unit 132.

In the separation unit 132, the transport processing unit 1102a acquires an MMTP packet having a packet ID of “0” from the input MMT data string (S209), and further acquires an MPT included in the acquired MMTP packet. (S210). Next, the transport processing unit 1102a refers to the "MMT_package_id_byte" parameter of the acquired MPT, and confirms whether or not the lower 16 bits of the "MMT_package_id_byte" parameter have the same value as the service ID. In an example of the MPT data structure shown in FIG. 17, when the lower 16 bits of the "MMT_packet_id_byte" parameter have the same value as the service ID (S211: Yes), the MMTP packet having the packet ID "0" is said. It is determined that the MMTP packet has the data of the program corresponding to the service ID, and the acquisition of the MFU is executed based on the information possessed by the acquired MPT (S216).

On the other hand, when the lower 16 bits of the "MMT_packet_id_byte" parameter are not the same value as the service ID (S211: No), the MMTP packet having the packet ID "0" has the program data corresponding to the service ID. Judge that it is not a packet. In this case, the transport processing unit 1102a acquires the PLT again (S212), and by confirming the acquired PLT, the packet ID of the MMTP packet that transmits the MPT having the “MMT_package_id_byte” parameter corresponding to the service ID. Confirm (let's say x) (S213). Further, the transport processing unit 1102a acquires an MMTP packet whose packet ID is “x” from the input MMT data string (S214), and acquires an MPT included in the acquired MMTP packet (S215). Further, the MFU is acquired based on the acquired information of the MPT (S216).

It should be noted that the processing of S209 to S211 may not be performed, and the processing of S212 to S215 may always be performed. In this case, when the program data corresponding to the service ID is stored in the MMTP packet other than the packet ID "0", the processing time can be shortened.

When the MFU is acquired in the processing of S216, the transport processing unit 1102a extracts the coded video data, the coded audio data, and the like from the acquired MFU and outputs them to the video decoder 141, the audio decoder 143, and the like. Hereinafter, video / audio decoding processing based on the control of the AV decoding processing unit 1102b and presentation processing based on the control of the presentation processing unit 1102h are performed, but since each of the above processes is known, detailed description thereof will be omitted.

Through the above series of processes, the broadcast receiving device 100 of this embodiment can execute the channel selection (channel switching) operation. In particular, as described with reference to FIGS. 14 and 16, a service list and IP-related information are created at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change, and the ROM 103 and the storage unit. By storing it in a non-volatile memory such as 110 so that it can be referred to at all times, and referring to the service list and IP-related information stored in the non-volatile memory such as ROM 103 or the storage unit 110 at the time of channel selection (channel switching), It enables improvement of operation efficiency during channel selection (channel switching). That is, it is possible to shorten the time from the start of channel selection (channel switching) to the end of channel selection (channel switching) as compared with the case of reacquiring AMT or TLV-NIT at the time of channel selection (channel switching). Become.

[Screen layout control of broadcast receiver]
In the broadcast receiving device 100 of this embodiment, it is assumed that screen layout control based on the description of the LCT is possible. FIG. 18 shows an example of the data structure of the LCT.

In the figure, in particular, the "left_top_pos_x" parameter and the "right_down_pos_x" parameter set the horizontal position at the upper left and the horizontal position at the lower right of the area when the left side of the full screen display is "0" / the right side is "100". Each is shown as a ratio to the total number of pixels in the horizontal direction. The "left_top_pos_y" parameter and the "right_down_pos_y" parameter are the vertical positions of the upper left and lower right of the area when the upper side of the full screen display is "0" and the lower side is "100". It shall be shown as a ratio to the total number of pixels. Further, the "layer_order" parameter shall indicate the relative position of the region in the depth direction.

An example of assigning a layout to a layout number based on the setting of each parameter is shown in FIGS. 19A to 19D together with the setting value of each parameter.

FIG. 19A is a default layout setting of the broadcast receiving device 100 of this embodiment, and is an example of setting only one area on the entire screen. FIG. 19B is an example in which the entire screen is divided into three areas, and the respective areas are designated as “area 0”, “area 1”, and “area 2”. For example, when the number of pixels of the entire screen is 7680 pixels horizontally / 4320 pixels vertically, the "region 0" has the "left_top_pos_x" parameter "0", the "left_top_pos_y" parameter "0", and the "right_down_pos_x" parameter "80". , "Right_down_pos_y" Since the parameter is "80", it is set in the range of (0,0)-(6143,3455). Similarly, "region 1" is set in the range of (6144,0)-(7679,4319), and "region 2" is set in the range of (0,3456)-(6143,4319).

FIG. 19C is an example of setting three regions as in FIG. 19B, but “region 0” is set in the range of (0,0) − (7679,4319), and “region 1” and “region 1” and “region” are set. 2 ”is arranged in front of the“ region 0 ”in the same range as described above, depending on the setting of the“ layer_order ”parameter. In FIG. 19D, "area 0" is set in device 0 (default device: broadcast receiving device 100 in this embodiment), and "area 1" is set in device 1 (mobile information terminal 700 in this embodiment). This is an example of the case where it is done.

As described above, in the broadcasting system of the present embodiment, by using the LCT, it is possible to control the screen layout for displaying the multimedia service on the receiver as intended by the service provider.

It should be noted that the fractions after the decimal point generated when the screen is divided according to the set values of the parameters such as "left_top_pos_x" may be rounded up or down. It may be rounded (or rounded to zero in binary). For example, the number of pixels of the full screen is 7680 pixels / vertical 4320 pixels, the "left_top_pos_x" parameter of "area 0" is "0", the "left_top_pos_y" parameter is "0", the "right_down_pos_x" parameter is "51", and "right_down_". When the parameter is "51", "area 0" may be set in the range of (0,0)-(3916,2203) by the rounding process, or (0,0)-(3915, 3915, by the truncation process. You may set "area 0" in the range of 2202). Further, in consideration of the macro block at the time of the video compression processing, the round-up / round-down processing may be performed in units of 8 pixels, 16 pixels, or the like. By the processing, it becomes possible to efficiently perform the area setting based on the LCT and the resolution conversion processing of the multimedia content in the area.

[Exception handling for screen layout control of broadcast receiver]
In the broadcast receiving device 100 of this embodiment, even when the area control of the screen layout is performed by the above-mentioned LCT, when the user instructs to display the EPG screen, as an exception process, It is possible to perform screen layout control ignoring the description contents of the LCT. FIG. 20A shows an example of the exception handling operation of the screen layout control based on the LCT.

The screen layout control similar to that in FIG. 19B is performed according to the description of the LCT, the broadcast program image is displayed in the "area 0", and the broadcast of the program cooperation data and the like linked to the broadcast program in the "area 1" and the "area 2". When the user instructs the display of the EPG screen by a remote control (not shown) while the content is displayed, the broadcast receiving device 100 of the present embodiment describes the LCT as shown in FIG. 20A (A). Regardless of the content, the screen layout setting is returned to the default setting (that is, the screen layout control similar to that shown in FIG. 19A is performed), and the EPG screen is controlled to be displayed on the entire screen. Further, when the user instructs the end of the display of the EPG screen, the screen layout control according to the description contents of the LCT is re-executed.

By performing the above-mentioned control, the EPG screen can be displayed larger than the case where the EPG screen is displayed while maintaining the area control of the screen layout as shown in FIG. 20A (B). It is possible to improve the visibility.

The exception handling of the screen layout control is not applied only when the EPG screen is displayed, and as shown in FIG. 20B, various setting screens of the broadcast receiving device 100 (recording setting screen in the illustrated example). ) May be applied when displaying a child screen or displaying a dual screen.

In the case of the recording setting screen shown in FIG. 6A, the display area of the broadcast content is changed from the entire screen to only the sub screen portion at the lower right of the screen. Similarly, in the case of the two-screen display shown in FIG. 3B, the display area of the broadcast content is changed from the entire screen to only the split screen portion on the left side of the middle stage of the screen. In either case, the display area for displaying the broadcast content is narrower than when the entire screen is used, so that the area control of the screen layout is maintained within the display area (that is, the area division is performed). It is not preferable in terms of visual recognition to go and display a plurality of broadcast contents at the same time. Therefore, in the broadcast receiving device 100 of the present embodiment, in the above situation, only the broadcast content of the "area 0" is selected and displayed in the display area. Note that the broadcast contents of "area 1" and "area 2" may be selected and displayed according to the immediately preceding area selection status.

By performing the above-mentioned control, it is possible to improve the visibility of the broadcast content as compared with the case where various broadcast contents are displayed while maintaining the area control of the screen layout. The same applies when displaying a sub-screen on the recorded program list screen or displaying Internet content in a browser.

[EPG display of broadcast receiver]
In the broadcasting system of this embodiment, time-series information regarding events (so-called programs) included in each service constituting the broadcasting network is transmitted by MH-EIT. FIG. 21 shows an example of the data structure of MH-EIT of this embodiment. The MH-EIT is identified into two classes by the table ID (corresponding to the "talbe_id" parameter in the figure), and indicates the current / next event information of the own TLV stream and the schedule information of each event of the own TLV stream. Suppose it is possible. The broadcast receiving device 100 of this embodiment refers to the MH-EIT or the like and identifies by a service ID (corresponding to the “service_id” parameter in the figure) to provide information such as the start time and broadcast time of each event. It is possible to create an EPG screen by acquiring the above, and it is possible to superimpose the created EPG on the video information or the like in the video synthesis unit 161 and display it on the monitor unit 162.

FIG. 22A is a diagram showing an example of an EPG screen in the broadcast receiving device 100 of this embodiment. The EPG screen 162a has a matrix shape in which the vertical axis represents time and the horizontal axis represents service ID (channel), and detailed information of broadcast programs broadcast on each channel in each time zone is displayed. Further, the detailed information 162a1 of each broadcast program is mainly composed of a title area 162a2 and a detailed explanation area 162a3.

In the title area 162a2, the program title of the broadcast program, symbols representing the attributes of the broadcast program, and the like are displayed. The symbols / characters representing the attributes of the broadcast program are, for example, symbols / characters indicating that the program is a new program, symbols / characters indicating that the program is a rebroadcast program, and the like. Alternatively, it may be a mark or the like symbolizing "data" which means that it corresponds to data broadcasting by a broadcasting service. Further, it may be a mark 162a4 or the like symbolizing "NetWork" which means that the content or application related to the broadcast program can be acquired from the network. Further, by differentiating the background color of the detailed information 162a1 from others, or by surrounding the display area of the detailed information 162a1 with a thick frame, a symbol or the like representing the attribute of the broadcast program may be substituted.

It should be noted that each control information (message, table, descriptor, etc.) in the broadcasting system of this embodiment indicates that the content, application, etc. related to the broadcasting program can be acquired from the network. However, if the LAN cable is not connected to the LAN communication unit 121 of the broadcast receiving device 100 and the server devices on the network cannot be accessed, the mark 162a4 symbolizing the "NetWork" is used. Etc. may be controlled so as not to be displayed.

Further, when the broadcast program is a distribution program distributed via the Internet 200 and cannot be acquired only from the broadcast wave, the broadcast receiving device 100 is a server device on the network as described above. In a state where access to is not possible, as shown in FIG. 22B, the portion of the detailed information 162b1 displayed on the EPG screen 162b may be controlled to be grayed out. That is, it is controlled so that the detailed information of the distributed program that cannot be viewed is not displayed. Further, by differentiating the background color of the detailed information 162b1 from others, it may be used as an alternative to the grayout process. When detailed information 162b1 is selected by operating a remote controller (not shown), the broadcast receiving device 100 is in a state where it cannot access each server device on the network, or the distribution program associated with the detailed information 162b1 is viewed. The user may be notified by a pop-up or the like that it cannot be performed.

With each of the above-mentioned controls, the broadcast receiving device 100 can provide program information of each broadcast program to the user in a more comfortable format according to the network connection status.

FIG. 22C is a diagram showing another example of the EPG screen in the broadcast receiving device 100 of this embodiment. In the figure, "M1 TV", "M2 broadcast", "M3 channel", "M4TV", "TV M5", etc. are the broadcast station names of each channel, and in particular, the "M2 broadcast" station depends on the broadcast wave. It is assumed that the broadcast program to be distributed and the distribution program distributed via the Internet 200 (information 162c1 in the frame indicated by "net broadcasting" in the figure) are provided at the same time.

As shown in the figure, when there is a channel having only a distribution program distributed via the Internet 200, all channels (including information 162c1) are normally shown in the EPG screen 162c of the figure (A). Control to display the information of. On the other hand, when the broadcast receiving device 100 cannot access each server device on the network, as shown in the EPG screen 162d of FIG. It may be controlled not to display the channel information of "M2 broadcasting (net broadcasting)" (information 162c1 in the figure (A)).

By each of the above-mentioned controls, the user of the broadcast receiving device 100 can eliminate the need to confirm the information of the channel that he / she cannot watch.

[Emergency warning broadcast display of broadcast receiver]
The broadcast receiving device 100 of this embodiment performs an emergency warning broadcast reception process when the emergency warning broadcast start control signal bit of the TMCC signal included in the transmission data including the TLV stream changes from "0" to "1". It shall be possible to do so.

The emergency warning broadcast may be provided as a full-screen display application, or may be provided as character information in a character supermarket. When the emergency warning broadcast is provided as character information in the character super, it is preferable to display the character information of the character super regardless of the state of the broadcast receiving device 100 immediately before receiving the emergency warning broadcast. That is, as shown in FIG. 23, when the user watches a normal broadcast program and receives the emergency warning broadcast while the program screen 162e of the broadcast program is displayed on the monitor unit 162, the emergency warning broadcast is performed. The character information 162e1 is superimposed and displayed on the program screen 162e. Similarly, when the user instructs the display of the EPG screen and receives the emergency warning broadcast while the EPG screen 162f is displayed on the monitor unit 162, the character information 162f1 by the emergency warning broadcast is superimposed on the EPG screen 162f. Is controlled to be displayed.

By the above-mentioned control, in the broadcast receiving device 100 of this embodiment, even when the user selects and displays the EPG screen, various setting screens, recorded program list screen, Internet browser, etc., the emergency warning broadcast is performed. Is received, it is possible to avoid overlooking important text information based on the emergency warning broadcast. Note that this control may be performed on the character information of a normal character supermarket that does not depend on the emergency warning broadcast.

[Various exception handling]
When the broadcast receiving device 100 of this embodiment cannot acquire the data outside the TLV stream in the same package, for example, the following exception handling may be performed.

As described with reference to FIG. 6E, in the broadcasting system supported by the broadcast receiving device 100 of the present embodiment, in the TLV stream based on the location information stored in the MPT (corresponding to “MMT_general_location_info ()” in FIG. 17). The data to be acquired and the data to be acquired by a route other than the TLV stream can be included in the same package. However, the data transmission path other than the TLV stream (for example, IPv4 data flow, IPv6 data flow, MPEG2-TS of broadcasting, etc.) indicated by the location information is a reception function different from the reception function of the TLV / MMT stream. Therefore, even when the broadcast receiving device 100 is operating, the receiving function of these transmission paths is not operating, or the receiving function itself is operating but the relay device or the like is not operating. There may be situations where data cannot be acquired from these transmission paths, such as situations where the transmission paths of the above are not connected by wire or wirelessly, or where the broadcast receiver 100 is installed in an environment where these transmission paths cannot be connected in the first place. ..

Under such circumstances, an event indicating that the location information stored in the MPT associates the data acquired in the TLV stream with the data acquired by a route other than the TLV stream so as to be included in the same package. When received, the broadcast receiving device 100 of this embodiment may perform the following operations, for example.

For example, as shown in FIGS. 19B and 19C, the LCT sets a plurality of areas in the screen, displays the image included in the TLV stream in "area 0", and displays "area 1" and "area 2". Is associated so that the data acquired by the transmission path other than the TLV stream is displayed, and the data of the transmission path other than the TLV stream to be displayed in "Area 1" and "Area 2" is displayed. If it cannot be acquired, the layout display of a plurality of areas specified by the LCT may be prohibited. Specifically, even if the LCT is received, the image of the content to be received in the TLV stream is left displayed in the "area 0" of the default layout display shown in FIG. 19A, as shown in FIGS. 19B and 19C. It is sufficient not to shift to the layout display of multiple areas. Further, in this state, even if a change instruction from the default layout to the layout shown by the LCT is input to the operation input unit 170 of FIG. 7A, the default layout display shown in FIG. 19A can be left as it is, or other data broadcasting screens. It may be possible not to shift to the layout display of a plurality of areas as shown in FIGS. 19B and 19C by switching to.

As shown in FIGS. 19B and 19C, the LCT sets a plurality of areas in the screen, displays the image included in the TLV stream in "area 0", and displays the images included in the TLV stream in "area 1" and "area 2". When the data acquired in the transmission path other than the TLV stream is associated so as to be displayed, the data of the transmission path other than the TLV stream to be displayed in "Area 1" or "Area 2" cannot be acquired. As another operation example of the case, the display frames of a plurality of areas of FIGS. 19B and 19C shown by the LCT are once displayed, and the background color and a predetermined still image are displayed for the "area 1" and the "area 2". If the data of the transmission path other than the TLV stream indicated by the location information of the MPT cannot be acquired even after the lapse of a predetermined time, the display may be switched to return to the default layout display state shown in FIG. 19A. In this case, if the program video included in the TLV stream is continuously displayed in the "area 0" even when the layouts of FIGS. 19A, 19B, and 19C are changed, the user's program video itself Is preferable because it continues.

Further, since the data of the transmission path other than the TLV stream to be displayed in "Area 1" and "Area 2" cannot be acquired, the content received in the TLV stream in "Area 0" of the default layout display shown in FIG. 19A. When the video of the above is displayed, the various communication functions and various reception functions of the broadcast receiving device 100 of this embodiment start to operate, and the communication environment, communication status, and various reception functions of the various communication functions are displayed. Due to changes in the reception environment and reception status, it is possible that data on a transmission path other than the TLV stream to be displayed in "Region 1" or "Region 2" can be acquired. In this case, the broadcast receiving device 100 of the present embodiment immediately switches from the default layout display shown in FIG. 19A to the layout of a plurality of areas as shown in FIGS. 19B and 19C shown by the LCT, and sets the TLV in "area 0". The video of the content received in the stream may be displayed, and the data acquired from a transmission path other than the TLV stream may be displayed in "area 1" or "area 2". Further, the layout change may be executed after the change instruction from the default layout to the layout indicated by the LCT is input from the operation input unit 170 without immediately changing the layout.

[Copyright protection function]
In the digital broadcasting system supported by the broadcast receiving device 100 of the present embodiment, by transmitting the MPT including the copy control information, for example, "unlimited copy possible"("unlimited copy possible and storage" by the copy control information. It may be divided into two types: "encryption processing required at the time of output" and "unlimited copy possible and no encryption processing required at the time of storage and output"), "only one generation can be copied", "predetermined multiple times can be copied" ( For example, if 9 times copy is possible + 1 move is possible, so-called "dubbing 10"), "copy prohibition", or the like, the copy control state of the content referred to by the MPT may be indicated and transmitted. In this case, the broadcast receiving device 100 of the present embodiment stores the content in the storage (storage) unit 110, records it on a removable recording medium, outputs it to an external device, and transfers it to the external device according to the copy control information. It may be configured to control copying, moving processing to an external device, and the like. The target of the storage process may include not only the storage (storage) unit 110 inside the broadcast receiving device 100 but also a record subjected to protection processing such as encryption processing so that the data can be reproduced only by the broadcast receiving device 100. .. Specifically, the target of the storage process includes an external recording device or the like that can be recorded and reproduced only by the broadcast receiving device 100.

A specific example of processing based on the copy control information will be described below.

First, when the copy control information included in the MPT indicates "unlimited copying is possible", the broadcast receiving device 100 of this embodiment stores in the storage (storage) unit 110, records in a removable recording medium, and is an external device. Output to, copy to an external device, and move processing to an external device may be performed without restrictions. However, if "unlimited copy possible and encryption processing required for storage and output" and "unlimited copy possible and encryption processing not required for storage and output" are separated, "unlimited copy possible and storage and output" When "sometimes encryption processing is required", the number of times of storage in the storage (storage) unit 110, recording on removable recording media, output to external devices, copying to external devices, and move processing to external devices is limited. However, it is necessary to perform encryption processing in each case.

Further, when the copy control information included in the MPT indicates "copying is possible only for one generation", the broadcast receiving device 100 of this embodiment enables encrypted storage in the storage (storage) unit 110. When the stored content is output to an external device for viewing, it is encrypted and output together with the copy control information of "copy prohibited". However, so-called move processing to an external device (a process of copying the content to the external device and making the content in the storage (storage) unit 110 of the broadcast receiving device 100 unplayable by an erasing process or the like) is possible.

Further, when the copy control information included in the MPT indicates "copying is possible a predetermined number of times", the broadcast receiving device 100 of this embodiment can be encrypted and stored in the storage (storage) unit 110. When the stored content is output to an external device for viewing, it is encrypted and output together with the copy control information of "copy prohibited". However, it may be possible to copy and move a predetermined number of copies to an external device. In the case of the so-called "dubbing 10" regulation, 9 copies and 1 move process may be performed on an external device.

Further, when the copy control information included in the MPT indicates "copy prohibited", the broadcast receiving device 100 of this embodiment prohibits copying to the storage (storage) unit 110. However, the broadcast receiving device 100 stores (stores) unit 110 only for a predetermined time specified in advance or for a predetermined time specified by control information (for example, according to the MH-Expire descriptor shown in FIG. 6D) included in the broadcast signal. When it is configured to have a "temporary storage" mode that enables holding in the storage (storage) unit 110, even if the copy control information included in the MPT indicates "copy prohibition". It enables temporary retention of the content. When the copy control information included in the MPT is "copy prohibited" and the content is output for viewing on an external device, it is encrypted and output together with the "copy prohibited" copy control information.

The output for viewing to the above-mentioned external device may be performed via the video output unit 163 and the audio output unit 166 of FIG. 7A, the digital I / F unit 125, the LAN communication unit 121, or the like. The copy or move process to the above-mentioned external device may be performed via the digital I / F unit 125 or the LAN communication unit 121 of FIG. 7A.

According to the process described above, appropriate content protection can be realized according to the copy control information associated with the content.

Further, the copy control information is a copy process of the content indicating copy restrictions such as "only one generation can be copied", "predetermined multiple times can be copied", and "copy prohibited" to an external device via the LAN communication unit 121. Is possible only when the IP address of the external device that is the destination of the transmission packet from the broadcast receiving device 100 is in the same subnet as the IP address of the broadcast receiving device 100, and the IP address of the external device is the broadcast receiving device. If it is outside the same subnet as the IP address of 100, it may be prohibited. The content whose copy control information can be copied unlimitedly and encryption processing is required at the time of storage and output may be handled in the same manner.

Similarly, once the copy control information indicates copy restrictions such as "only one generation can be copied", "predetermined multiple times can be copied", "unlimited copy is possible and encryption processing is required at the time of storage and output". Regarding the process of moving to an external device via the LAN communication unit 121 after storing in the storage (storage) unit 110, the IP address of the external device that is the destination of the transmission packet from the broadcast receiving device 100 is the broadcast receiving device 100. It is possible only when it is in the same subnet as the IP address of the broadcast receiving device 100, and it may be prohibited when the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving device 100.

As for the viewing video output and audio output of the content stored in the storage (storage) unit 110 of the broadcast receiving device 100, in principle, the IP address of the external device that is the destination of the transmission packet from the broadcast receiving device 100 receives the broadcast. It is possible only when the IP address of the device 100 is in the same subnet, and it is prohibited when the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving device 100. However, the registration process as a device that is connected to the external device within the same subnet as the IP address of the broadcast receiving device 100 within a predetermined period and can be viewed even outside the same subnet as the IP address of the broadcast receiving device 100. In the case of a device that has been (paired), even if the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving device 100, the storage (storage) of the broadcasting receiving device 100 in the external device is performed. It may be configured to enable viewing video output and audio output of the content stored in the unit 110. In this case, the video output and audio output for viewing are performed by encrypting the content.

According to the processing described above, both user convenience and content protection can be achieved by performing different processing depending on whether the external device is in the same subnet or outside the same subnet as the IP address of the broadcast receiving device 100. Can be realized.

Next, as described with reference to FIG. 6E, in the digital broadcasting system supported by the broadcast receiving device 100 of the present embodiment, the location information in the MPT (“MMT_general_location_info ()” in FIG. 17) is used to display the TLV stream of the broadcasting path. Data acquired by a route different from the acquired data (IPv4, IPv6, MPEG2-TS, URL, etc.) may be included in the same package and event as the data acquired in the TLV stream, but at this time, it is copied to MPT. Content protection when control information is included will be described.

First, when copy control information is included in the MPT, the data included in the same package and the same event in the location information is a route different from the data acquired in the TLV stream of the broadcast route (IPv4, IPv6, MPEG2-TS, URL, etc.) ) May be used to control the data according to the copy control information included in the TLV stream. As described above, the copy control state of the content specified by these copy control information is "unlimited copy possible" ("unlimited copy possible and encryption processing required at storage and output" and "unlimited copy possible". And it may be divided into two types, "encryption processing is not required at the time of storage and output"), "only one generation can be copied", "predetermined multiple times can be copied" (for example, if 9 times copy is possible + 1 move is possible, so-called " Dubbing 10 ”),“ copy prohibited ”, etc. can be specified.

Here, when the position of the data indicated by the location information includes the MPEG2-TS data transmitted by another digital broadcast signal, the MPEG2-TS data is associated with the copy control information even in the other digital broadcast signal. It is being broadcast. Then, how to perform copy control of the MPEG2-TS data according to what information (whether to follow the copy control information included in the TLV / MMT stream or the copy control information included in the MPEG2-TS) becomes a problem. ..

In the digital broadcasting system of this embodiment, as a solution to this problem, the broadcast receiving device 100 may perform any of the following plurality of solutions.

<Operation example 1>
In the first operation example, when the MPT contains the copy control information and the location information includes the MPEG2-TS data transmitted by another digital broadcast signal in the data included in the same package and the same event, the MPEG2- The copy control state indicated by the copy control information included in the TLV stream is preferentially controlled over the copy control state indicated by the copy control information included in the TS.

For example, the copy control state indicated by the copy control information included in the TLV stream is "1st generation copy possible", and the copy control state indicated by the copy control information included in MPEG2-TS is "predetermined multiple times copy possible". If there is, copy control may be performed as the content of "1st generation copy possible" even if the data is acquired by a route different from the data acquired by the TLV stream (digital broadcasting of MPEG2-TS transmission format). For example, the copy control state indicated by the copy control information included in the TLV stream is "unlimited copy possible", and the copy control state indicated by the copy control information included in the MPEG2-TS is "predetermined multiple times copy possible". If there is, copy control may be performed as "unlimited copy possible" content even if the data is acquired by a route different from the data acquired by the TLV stream (digital broadcasting in MPEG2-TS transmission format).

In the case of this operation, the data acquired by a route other than the TLV stream can also be put into the copy state to be managed in the broadcasting system supported by the broadcasting receiving device 100 of this embodiment.

<Operation example 2>
In the second operation example, when the MPT contains copy control information and the location information includes MPEG2-TS data transmitted by another digital broadcast signal in the same package and the same event, the TLV stream. The copy control state indicated by the copy control information included in MPEG2-TS is compared with the copy control state indicated by the copy control information included in MPEG2-TS, and the copy control state indicated by the copy control information included in MPEG2-TS is selected. Is stricter than the copy control state indicated by the copy control information included in the TLV stream, the storage process is performed in the storage (storage) unit 110 or the like, the recording process is performed in the removable recording medium, or the output processing is performed from the digital interface. At that time, it operates so as to exclude the MPEG2-TS data from the processing target content.

In the case of this operation, the data acquired by a route other than the TLV stream is copied on the broadcast receiving device 100 of this embodiment while respecting the original copy control information set in the broadcasting system that transmits the data. It is possible to eliminate duplication of control states.

Further, as a result of the comparison, when the copy control state indicated by the copy control information included in the MPEG2-TS is the same as the copy control state indicated by the copy control information included in the TLV stream, or a looser copy control state. May perform copy control on the MPEG2-TS data included in the same package and the same event in the location information as the content in the copy control state indicated by the copy control information included in the TLV stream.

In the case of this operation, the data acquired by a route other than the TLV stream is copied on the broadcast receiving device 100 of this embodiment while respecting the original copy control information set in the broadcasting system that transmits the data. It is possible to eliminate duplication of control states.

In the above description, the copyright protection function of the broadcast receiving device 100 of this embodiment has been described as being performed based on the copy control information included in the MPT. However, the table in which the copy control information is arranged is not limited to the MPT. In addition to the MPT, the MH-service description table (MH-SDT) and the MH-event information table (MH-EIT) described in FIG. 6B, or other tables are arranged for transmission, and the broadcast receiving device 100 follows these. Copyright protection processing may be performed.

According to the present embodiment described above, it is possible to provide a broadcast receiver compatible with MMT digital broadcasting.
(Example 2)

Hereinafter, Example 2 of the present invention will be described. The configuration, processing, effects, etc. in this embodiment shall be the same as in Example 1 unless otherwise specified. Therefore, in the following, the differences between the present embodiment and the first embodiment will be mainly described, and the common points will be omitted as much as possible in order to avoid duplication. Further, the broadcast receiving device of this embodiment will be described below assuming that it is a television receiver that supports both the MMT system and the MPEG2-TS system as the media transport system.

[Hardware configuration of broadcast receiver]
FIG. 24 is a block diagram showing an example of the internal configuration of the broadcast receiving device 800. The broadcast receiving device 800 includes a main control unit 801, a system bus 802, a ROM 803, a RAM 804, a storage unit 810, a LAN communication unit 821, an expansion interface unit 824, a digital interface unit 825, a first tuner / demodulation unit 831, and a second tuner /. Demodulation unit 832, MMT decoding processing unit 841, MPEG2-TS decoding processing unit 842, video synthesis unit 861, monitor unit 862, video output unit 863, audio synthesis unit 864, speaker unit 865, audio output unit 866, operation input unit 870 Consists of ,.

Main control unit 801, system bus 802, ROM 803, RAM 804, storage unit 810, expansion interface unit 824, digital interface unit 825, monitor unit 862, video output unit 863, speaker unit 865, audio output unit 866, operation input unit 870, Etc. are the main control unit 101, system bus 102, ROM 103, RAM 104, storage (storage) unit 110, expansion interface unit 124, digital interface unit 125, monitor unit 162, video output unit 163 in the broadcast receiving device 100 of the first embodiment. , The speaker unit 165, the audio output unit 166, the operation input unit 170, and the like have the same functions, and detailed description thereof will be omitted.

The first tuner / demodulation unit 831 receives the broadcast wave of the broadcast service that employs MMT as the media transport method via an antenna (not shown), and the service desired by the user is controlled by the main control unit 801. Synchronize (select) to the channel of. Further, the first tuner / demodulation unit 831 demodulates the received broadcast signal, acquires an MMT data string, and outputs it to the MMT decoding processing unit 841. The second tuner / demodulation unit 832 receives the broadcast wave of the broadcasting service adopting MPEG2-TS as the media transport method via an antenna (not shown), and the user desires based on the control of the main control unit 801. Synchronize (select) the channel of the service to be performed. Further, the second tuner / demodulation unit 832 demodulates the received broadcast signal, acquires the MPEG2-TS data string, and outputs the MPEG2-TS decoding processing unit 842.

The MMT decoding processing unit 841 inputs the MMT data string output from the first tuner / demodulation unit 831, and based on the control signal included in the MMT data string, the video data string and the audio data string, which are real-time presentation elements, Separation processing of character super data string, subtitle data string, etc., decoding processing, etc. are performed. The MMT decoding processing unit 841 includes a separation unit 132, a video decoder 141, a video color gamut conversion unit 142, an audio decoder 143, a character super decoder 144, a subtitle decoder 145, and a subtitle synthesis unit 146 in the broadcast receiving device 100 of the first embodiment. It is provided with functions corresponding to the subtitle color gamut conversion unit 147, the data decoder 151, the cache unit 152, the application control unit 153, the browser unit 154, the application color gamut conversion unit 155, the sound source unit 156, and the like. The MMT decoding processing unit 841 can perform various processes described in the first embodiment. Since the details of the various processes are as described in the first embodiment, the description thereof will be omitted.

The MPEG2-TS decoding processing unit 842 inputs the MPEG2-TS data string output from the second tuner / demodulation unit 832, and the video data which is a real-time presentation element based on the control signal included in the MPEG2-TS data string. Separation processing of columns, audio data strings, character super data strings, subtitle data strings, etc., decoding processing, etc. are performed. The MPEG2-TS decoding processing unit 842 has a function equivalent to that of the IRD (Integrated Receiver Decorder) unit of a conventional television receiver that receives broadcast waves of a broadcasting service that employs MPEG2-TS as a media transport method. Detailed description will be omitted.

The video synthesis unit 861 inputs the video information, subtitle information, and application information output from the MMT decoding processing unit 841 and the video information, subtitle information, and application information output from the MPEG2-TS decoding processing unit 842. Perform processing such as selection and / or superimposition as appropriate. The video synthesis unit 861 includes a video RAM (not shown), and the monitor unit 862 and the like are driven based on the video information and the like input to the video RAM. Further, the video composition unit 861 performs scaling processing, superimposition processing of EPG screen information, and the like, if necessary, based on the control of the main control unit 801. The voice synthesis unit 164 inputs the voice information output from the MMT decoding processing unit 841 and the voice information output from the MPEG2-TS decoding processing unit 842, and appropriately selects and / or performs processing such as mixing.

The LAN communication unit 821 is connected to the Internet 200 via the router device 200r, and transmits / receives data to / from each server device and other communication devices on the Internet 200. Further, the MMT data string (or a part thereof) or the MPEG2-TS data string (or a part thereof) of the program transmitted via the communication line is acquired, and the MMT decoding processing unit 841 or the MPEG2-TS is appropriately obtained. Output to the decoding processing unit 842.

[Time display of broadcast receiver]
In the broadcast receiving device 800 of this embodiment, it is assumed that the current date and the current time can be displayed on the EPG screen, various setting screens, and the like. The information regarding the current date and the current time is transmitted by MH-TOT or the like in a broadcasting service that uses MMT as the media transport method, and MPEG- in a broadcasting service that uses MPEG2-TS as the media transport method. 2 It is transmitted by TOT (Time Offset Table) or the like provided in SI (Service Information) specified in the system. The broadcast receiving device 800 can acquire information on the current date and the current time by referring to the MH-TOT and the TOT.

Further, in general, when the video synthesis unit 861 mainly selects the video information or the like output from the MMT decoding processing unit 841, the information regarding the current date and the current time acquired from the MH-TOT is used. When the video synthesis unit 861 mainly selects the video information or the like output from the MPEG2-TS decoding processing unit 842 by superimposing it on the video information or the like, the information on the current date or the current time acquired from the TOT is described above. It may be controlled so as to be superimposed on video information or the like.

However, since there are differences in encoding / decoding processing, transmission path, etc. between the broadcasting service that uses MMT as the media transport method and the broadcasting service that uses MPEG2-TS as the media transport method, the current time is displayed in particular. In the above, there is a possibility that inconsistency may occur between the selection of the broadcasting service adopting MMT as the media transport method and the selection of the broadcasting service adopting MPEG2-TS as the media transport method. For example, as shown in FIG. 25, the EPG screen 162g for displaying the channel information of the broadcasting service adopting MMT as the media transport method displays the channel information of the broadcasting service adopting MPEG2-TS as the media transport method. When the screen display is switched to the screen 162h, the display of the current time is switched from the current time display 162g1 to the current time display 162h1, which causes inconsistency, which may cause the user to feel a visual discomfort.

In the broadcast receiving device 800 of the present embodiment, even when the video synthesizing unit 861 mainly selects the video information or the like output from the MMT decoding processing unit 841 in order to prevent the user from feeling a visual discomfort. , Information on the current date and the current time acquired from the TOT is controlled to be superimposed on the video information and the like. That is, the content of the broadcasting service that adopts MMT as the media transport method is controlled so as to superimpose the current time information provided by the broadcasting service that adopts MPEG2-TS as the media transport method.

By performing the above control, the broadcast receiving device 800 of the present embodiment always displays the current time information acquired by referring to the TOT when displaying the current time. Therefore, even when switching between a broadcasting service that uses MMT as the media transport method and a broadcasting service that uses MPEG2-TS as the media transport method, the user feels a visual discomfort due to the inconsistency in the display of the current time. It is possible to prevent it from being caused.

Note that FIG. 26 shows an example of selection control of the current time information reference source according to the reception status of each broadcast service in the broadcast receiving device 800 of this embodiment. In the broadcast receiving device 800 of this embodiment, when the broadcasting service adopting MPEG2-TS as the media transport method can be received, the current time information is always acquired by referring to the TOT. , The MH-TOT only when the broadcasting service adopting MPEG2-TS as the media transport method cannot be received and the broadcasting service adopting MMT as the media transport method can be received. Control to get the current time information by referring to.

Further, contrary to the above-mentioned control, the current time information provided by the broadcasting service adopting MMT as the media transport method is superimposed on the content of the broadcasting service adopting MPEG2-TS as the media transport method. Even if it is controlled, the same effect as described above can be obtained.

As described above, when controlling so as to superimpose the current time information provided by the broadcasting service adopting MPEG2-TS as the media transport method on the contents of the broadcasting service adopting MMT as the media transport method. In any case, when the content of the broadcasting service adopting MPEG2-TS as the media transport method is controlled so as to superimpose the current time information provided by the broadcasting service adopting MMT as the media transport method. Also in the above, the current time information can be corrected by referring to the "delta" parameter of the time information in the TMCC extended information area, as described in [Time management of broadcast receiving device] in the first embodiment. It is possible.

[EPG display of broadcast receiver]
Event schedule information of a broadcasting service that adopts MMT as a media transport method is transmitted by MH-EIT or the like. On the other hand, the event schedule information of the broadcasting service adopting MPEG2-TS as the media transport method is transmitted by EIT (Event Information Table) or the like provided in SI defined in the MPEG-2 system. Therefore, in general, when displaying video information or the like provided by a broadcasting service that uses MMT as a media transport method, event schedule information (MH-EIT) of the broadcasting service that uses MMT is displayed. ) Is available, and when displaying video information, etc. provided by a broadcasting service that uses MPEG2-TS as the media transport method, event schedule information of the broadcasting service that uses MPEG2-TS. (EIT) can be obtained.

However, the broadcast receiving device 800 of this embodiment is also displaying video information or the like provided by a broadcasting service that employs MMT as the media transport method, or MPEG2-TS as the media transport method. Even when displaying video information or the like provided by the broadcasting service that employs the above, both the MH-EIT and the EIT can be acquired, and the usability for the user is improved.

FIG. 27A shows an example of the EPG screen in the broadcast receiving device 800 of this embodiment. In the figure, the EPG screen 162i is an EPG screen created based on MH-EIT, a broadcasting service that adopts MMT as a media transport method, and is "M1 TV", "M2 broadcasting", "M3 channel", "M4TV". , "Television M5", etc. are the names of broadcasting stations of broadcasting services that have adopted MMT as the media transport method, respectively. The EPG screen 162j is an EPG screen created based on the EIT of a broadcasting service that adopts MPEG2-TS as a media transport method, and is "T6 TV", "T7 broadcasting", "T8 channel", "T9TV". , "TV TA" and the like are the names of broadcasting stations of broadcasting services that adopt MPEG2-TS as the media transport method, respectively.

For example, when a user is instructing to display an EPG screen by operating a remote controller (not shown) while watching a broadcast program provided by a broadcasting service that employs MMT as a media transport method, the initial screen of the EPG screen (shown). Omitted) is displayed. The initial screen of the EPG screen is an EPG screen created based on MH-EIT, a broadcasting service that adopts MMT as a media transport method, and is "17: 00-" of "October 7, 2014 (today)". (Near the current time) ”is displayed with detailed information on the broadcast programs of each channel. Next, the user wants to check the detailed information of the broadcast program of each channel of "20: 00-" of "October 9, 2014", and instructs to update the EPG screen by operating the remote controller (not shown). Then, the EPG screen 162i is displayed.

Furthermore, when the user wants to confirm the detailed information of the broadcast program provided by the broadcast service that adopts MPEG2-TS as the media transport method and instructs to switch the network by operating the remote controller (not shown), the EPG. The screen 162j is displayed. At this time, in the broadcast receiving device 800 of this embodiment, the initial screen of the EPG screen created based on the EIT of the broadcasting service adopting MPEG2-TS as the media transport method (that is, "October 7, 2014" (Detailed information on the broadcast program of each channel of "17:00 ~"), but the same time zone as the EPG screen 162i displayed immediately before (that is, "20:00 ~" of "October 9, 2014" 』) Control to display detailed information of the broadcast program of each channel.

With the above-mentioned control, the user can continuously confirm detailed information about broadcast programs of the same day and the same time zone of a plurality of networks having different media transport methods by a simple operation. That is, the usability of the broadcast receiving device 800 is improved.

FIG. 27B is a diagram showing an example different from the above on the EPG screen in the broadcast receiving device 800 of this embodiment. The EPG screen 162k shows a state in which the EPG screen 162i shown in FIG. 27A is scrolled in the channel direction (horizontal direction) by operating a remote controller (not shown). That is, in the example shown in FIG. 27B, the channel information and media created based on the MH-EIT of the broadcasting service that adopts MMT as the media transport method by scrolling the EPG screen in the channel direction (horizontal direction). Channel information created based on the EIT of a broadcasting service that employs MPEG2-TS as the transport method is seamlessly displayed on the same time axis.

Therefore, it is created based on the EIT of the broadcasting service that adopts MPEG2-TS as the media transport method while the user is checking the channel information created based on the MH-EIT of the broadcasting service that adopts MMT as the media transport method. Even when it is desired to confirm the channel information, it is possible to eliminate the need for an instruction to switch the network by operating a remote controller (not shown). Further, the user can simultaneously confirm detailed information about broadcast programs of the same day and the same time zone of a plurality of networks having different media transport methods. That is, the usability of the broadcast receiving device 800 is improved.
(Example 3)

Hereinafter, Example 3 of the present invention will be described. The configuration and effects of this example shall be the same as those of Examples 1 and 2 unless otherwise specified. Therefore, in the following, the differences between the present embodiment and the first and second embodiments will be mainly described, and the common points will be omitted as much as possible to avoid duplication. In this embodiment, the handling of the presentation area information set by the layout setting table (LCT) shown in FIG. 18 will be described.

[Hardware configuration of broadcast receiver]
Since the hardware configuration of the broadcast receiving device 100 is the same as that of the first embodiment, the description thereof will be omitted.

[Program data structure]
FIG. 28 shows the structure of program data. The program data includes information (asset 30003) presented to the broadcast receiving device 100 such as video, audio, and program cooperation information, and control information. The program cooperation information stores character information, graphic information, image information, video information, and the like for presenting along with the program video. FIG. 28 shows a PA message 30,000 that describes the method of presenting the asset 30003 and the acquisition destination information among the control information. The acquisition destination of the asset 30003 is described as MMT_general_location_info (FIG. 31) in the MP table (MPT) 30001 (FIG. 17) in the PA message 30000 (FIG. 30). In addition, the layout setting table (LCT) 30100 (FIG. 18) is arranged in the PA message 30000, and the layout of the area where each asset 30003 should be presented is described. An example of the layout of the presentation area is shown in FIGS. 19A to 19D.

A package list table (PLT) 30002 (FIG. 32) is arranged in the PA message 30000, and another acquisition destination of the PA message 30000 can be described by MMT_general_location_info (FIG. 31) in the PLT. By designating the acquisition destination of the PA message 30000, the PA message 30000 can have a hierarchical structure. The location type of the acquisition destination of the PA message 30000 and the asset 30003 is shown in FIG.

Normally, the hierarchical structure of PA message 30000 is limited to two layers as shown in FIG. 28, but PLT30002 may be further arranged in PA message 30000 of the second layer to increase the number of layers.

Since the asset is composed of the Media Processing Unit (MPU) which is the processing unit (FIG. 29), the presentation area of the asset 30003 can be specified by specifying the presentation area of the MPU in the MPU presentation area designation descriptor (FIG. 34). specify. The MPU presentation area specification descriptor is placed in the asset descriptor area of the MPT. Since the presentation area is specified for each MPU, a presentation method in which the presentation area of the same asset 30003 is changed during the presentation is also possible. In order to reduce the amount of data, the presentation area is not specified for all MPUs belonging to the asset, and only the presentation area of the head MPU and the head MPU of the MPU group whose presentation area is changed is specified. The control method is also possible.

[Example of asset presentation operation]
<Operation example 1>
The broadcast receiving device 100 acquires the presentation area information by reading the LCT 30100. FIG. 16 shows a flow in which the broadcast receiving device 100 acquires the control information of the program as an example of channel switching. Like the MPT30001, the LCT30100 is arranged in the MMTP packet and transmitted. Since the designation information of the presentation area of the asset 30003 is described in the MPT30001, it is preferable that the LCT30100 is acquired before the MPT30001. As shown in FIG. 16, it is preferably acquired as a step between S209 and S210 and between S214 and S215. Even if the acquisition cannot be performed at the above timing, it is similarly preferable if the LCT can be acquired before S216.

The LCT 30100 is arranged in the PA message 30000, but the LCT 30100 related to the asset 30003 corresponding to the PA message in the second layer is arranged in the PA message 30000 in the first layer or in the PA message 30000 in the second layer. To do. In the presentation of the asset 30003, the presentation area information of the LCT 30100 arranged in the PA message 30000 to which the asset 30003 to be presented belongs is preferentially used. When the LCT 30100 is not arranged in the PA message 30100 to which the LCT 30100 belongs, the presentation area information of the LCT 30100 arranged in the PA message 30100 in the upper layer is used.

By using the method of this operation example, when the same LCT30100 is used for the entire program data of FIG. 28, if the common LCT30100 is arranged in the PA message 30000 of the first layer, the presentation area is presented at an early timing. Since the information can be acquired, the program data can be presented promptly.

<Operation example 2>
If the LCT30100 is not included in the MMTP packet, the presentation area information of the LCT30100 acquired so far is used. That is, the broadcast receiving device stores the presentation area information of the LCT 30100, and updates the stored presentation area information each time a new LCT 30100 is acquired.

However, immediately after the event that the presentation area information used up to that point becomes invalid, such as when the power is turned on or when the channel is changed, there is no valid presentation area information yet, so even if the video data or audio data of the program is displayed. Even if it is acquired, it may not be possible to present the data. Therefore, until the valid presentation area information is acquired, the presentation process is performed assuming that the presentation area shown in FIG. 19A is set as the provisional presentation area information. The setting of FIG. 19A is hereinafter referred to as a default setting. The presentation area shown in the default setting (FIG. 19A) is a device having a device_id of 0, that is, a full-screen display area is set for the main device, 0 is assigned to layout_number, 0 is assigned to region_number, and 0 is assigned to layer_order.

In the state where only the main asset 30201 is presented by FIG. 35A using the provisional presentation area information, after the LCT 30100 is acquired by FIG. 35B, the sub-asset 30202 is also presented according to the program's original presentation area information. It is in a state of being. When the provisional presentation area information is used, it is assumed that the area where layout_number is 0 and region_number is 0 is specified by ignoring the presentation area specification of the main asset, and other assets are not presented. Here, the main asset means an asset for which region_number0 of the main device is specified, or an asset for which region_number0 is specified for an asset transmitted by a broadcast wave, and a sub-asset means an asset other than that. To do.

By setting the temporary presentation area information in this way, at least the main asset presentation process can be performed even before the information of the LCT 30100 is read.

<Operation example 3>
In operation example 2, an example is shown in which only the main asset is presented using the default presentation area information until a new LCT30100 is acquired when the channel is changed, but it is used in the program that has been watched up to that point. You may use the LCT30100 that has been used. The asset (main asset) specified in the area where region_number is 0 in the program after the channel change is presented in the area where the region_number of the presentation area information used until then is 0, and the other assets (sub-asset) are displayed. do not do.

After acquiring the LCT30100 of the program after the channel change, all the assets are presented using the presentation area information. Further, when the LCT 30100 used in the program that has been viewed up to that point divides the display area as shown in FIG. 19B, the process of operation example 2 is performed, and the process up to that point is performed. If the LCT30100 used in the program being viewed has an overlay display as shown in FIG. 19C, the process of operation example 3 may be performed. Further, when the LCT30100 used in the program that has been viewed up to that point has a region of region_number 1 or later, a predetermined pattern, message, or the like may be displayed in the region. ..

By using the presentation area information of the program that has been viewed up to that point in this way, at least the main asset presentation process can be performed even before the information of the LCT 30100 is read.

<Operation example 4>
Since the original channel may be restored after changing the channel, it is also possible to store the LCT30100 information once read in association with the channel information and use the stored presentation area information when returning the channel. good. If the latest LCT30100 is stored for all the channels that can be received by the broadcast receiving device 100, the convenience of controlling the presentation area when changing the channel is improved.

In addition, since the presentation area information may be changed even during the program, if the expiration date is set in the LCT30100 and the expiration date has passed when the channel is returned, the presentation area information is used. Instead, only the main asset is presented by using the default setting or by using the presentation area information of the program that has been viewed so far by the method shown in the operation example 2 or the operation example 3. Alternatively, only the main asset may be presented using the expired presentation area information of the channel. Of course, after acquiring the new LCT30100, the normal presentation method is returned. The control may be performed by referring to the expiration date, but may be performed by referring to the version instead of the expiration date information.

An example in which the expiration date is set for the LCT 30100 is shown in FIG. 36A. Set in NTP length format in the LCT expiration descriptor (ending_time). The descriptor is placed in the descriptor area of LCT30100 (FIG. 18).

Alternatively, as shown in FIG. 36B as the layout expiration date descriptor, the expiration date may be set for each layout.

Alternatively, as shown in FIG. 36C as the presentation area expiration date descriptor, the expiration date may be set for each area.

The expiration date may be set in a single layer, or the expiration date may be set in a plurality of layers. When setting the expiration date in multiple layers, priority is given to the earlier expiration date for each area.

By this method, the presentation area information once acquired can be effectively used while considering the expiration date.

<Operation example 5>
In operation example 4, the presentation area information of the program once read is stored, but the presentation area information (common presentation area information) commonly used for a plurality of programs in the channel is prepared for each channel and broadcast. It is also possible that the receiving device 100 acquires the common presentation area information in advance and uses the common presentation area information in each program.

The common presentation area information is acquired in advance by the broadcast receiving device 100 in the format of LCT (FIG. 18). The common presentation area descriptor shown in FIG. 37 is used to indicate that the information is the common presentation area information. This descriptor is placed in the descriptor area of the LCT (FIG. 18), and the layout number, which is a common presentation area, is listed together with the device number. service_id represents a broadcast channel. Further, the start time (beginning_time) and the end time (ending_time) of the valid period of the common presentation area information are described in the NTP length format. In addition, full_set_flag is also described so that it can be confirmed that all the information is available when the information is updated. The meanings of full_set_flag are summarized in FIG.

This common presentation area information may be read once a day or once a week, for example, in a time zone outside the broadcasting time. Further, it may be acquired from a broadcast wave or may be acquired via the Internet.

In addition, in case the common presentation area information is not read, the common presentation area information used in the program is transmitted as the LCT 30100 in the program data. At that time, the full_set_flag of the common presentation area descriptor indicates that the information is a part of the common presentation area information.

By using this common presentation area information, the asset 30003 can be quickly presented even at the timing immediately after the power of the broadcast receiving device 100 is turned on or immediately after the program is switched and before the acquisition of the LCT 30100.

<Operation example 6>
Although the method of using the common presentation area information is shown in the operation example 5, even if the common presentation area information is a channel transmitted by a broadcast wave or the Internet, it is not described in the common presentation area information depending on the program. The presentation area of the layout may be used.

Specifically, the LCT30100 of the program may describe layout information that is not described in the common presentation area information. At that time, since the layout number which is the common presentation area is described in the common presentation area descriptor (FIG. 37), the broadcast receiving device 100 grasps whether or not the LCT 30100 has additional presentation area information which is not the common presentation area. , Use that information in some cases. At this time, if the layout number and the area number of the presentation area overlap with the common presentation area information, which information is prioritized is determined in advance. That is, depending on the broadcasting system, the broadcasting receiving device 100 may be configured to give priority to the common presentation area information. Further, depending on the broadcasting system, the broadcasting receiving device 100 may be configured to give priority to the presentation area information of each program.

Further, when the common presentation area descriptor (FIG. 37) is not arranged in the LCT 30100, all the presentation area information described in the LCT 30100 is treated as if it is specified that it is not the common area information.

The additional presentation area information for each program may be acquired from the broadcast wave, but may be acquired via the Internet instead of the broadcast wave.

According to this method, it is possible to use the presentation area information optimized for each program while using the common presentation area information.

<Operation example 7>
Assets 30003 are presented in one presentation area, but when it is better to display as many terminals as possible, such as extraordinary news, the same content is presented on all terminals available at that time. Better.

As a specific method, among the layout settings of the main device (device having Device_id of 0) in the duplicate presentation area designation descriptor (FIG. 39), layout_number that sets the same area for other devices is described. This descriptor is placed in the descriptor area of LCT30100 (FIG. 18).

FIG. 40 shows an example in which a screen having the same contents is presented to a sub device (mobile information terminal 700) in addition to the main device (broadcast receiving device 100).

It should be noted that the presentation area information used in the original program may be stored in case of returning to the original program after the end of the extraordinary news, and the information may be used after the end of the extraordinary news.

This method enhances the awareness of important and urgent information.

<Operation example 8>
The presentation area of each asset 30003 is specified by layout_number (layout number) and region_number (area number) by the MPU presentation area designation descriptor (FIG. 34). If there is no presentation area information corresponding to the layout number and the area number, the asset cannot be presented, so the asset 30003 is not presented. However, when the abnormal asset 30003 is presented in a part of the screen area, it may not be apparent at first glance that the display is abnormal. Therefore, when an asset 30003 that cannot be presented occurs, an error display as shown in FIG. 41 is performed.

By this method, the viewer can recognize that the display is not performed normally.

<Operation example 9>
In the operation example 8, the operation when the presentation area without the presentation area information is specified has been described, but the operation when different assets 30003 specify the same presentation area will be described. In the case of an asset that displays some content, it cannot be displayed in the same presentation area. Therefore, the same presentation area must not be specified at the same time in different assets 20033. If specified at the same time, priority is given to assets transmitted by broadcast waves. Alternatively, the presentation of the asset 30003 that initially used the layout number and the area number is continued, and the presentation of the asset 30003 specified later is prohibited. Alternatively, the presentation of all assets 20033 with duplicate area specifications is prohibited. When an asset 30003 that cannot be presented occurs, an error display as shown in FIG. 41 may be performed.

However, for example, in the case of a video asset, when adding additional asset information to increase the gradation, it is possible to specify the same presentation area with different assets 30003. The information in the dependency descriptor is used to show that a plurality of assets are in a complementary relationship so as to constitute one content. The data structure of the dependency descriptor is shown in FIG. If there is this dependency, presentation is permitted even if the same presentation area is specified.

In order to manage the presentation area designation of the asset 0003, a management table of which asset 00033 specifies which presentation area may be used. FIG. 43 shows an example of the management table. Since the assets 30003 with asset IDs 1 and 3 and asset IDs 2 and 4 have a dependency relationship, display is permitted even if the same area is specified. On the other hand, since the asset 30003 of the asset ID 7 is a video asset and specifies the same area as the asset ID 0 regardless of the dependency, the presentation is prohibited.

Since the asset 30003 of the asset ID 1 is transmitted by a broadcast wave, this is given priority. Further, since the asset 0003 of the asset ID 8 is prohibited from being presented by the asset 0003 of the asset ID 7 of the same acquisition destination, it is highly possible that the voice is a pair of the asset ID 7, so the presentation is also prohibited. Further, since the assets of asset IDs 2, 4, 6 and 8 are voice assets and the voice assets are not directly related to the presentation process in the monitor unit 162, it is not always necessary to manage them in the management table. That is, only the video assets may be managed by the management table.

By controlling the presentation in this way, it is possible to prevent an abnormal presentation from being made when the control information is inconsistent.

<Operation example 10>
The dependency relationship of the asset 0003 includes a parallel relationship in which the content cannot be completed unless a plurality of dependent assets 0003 are prepared, and a case where the data for improving the image quality is different from the main asset 00033. It may be a dependent relationship, such as when giving in. The proactive asset 20033 can be presented independently, but the subordinate asset 30003 is likely to be presented abnormally if the proactive asset 30003 does not exist, so the subordinate asset 30003 is acquired. If this is not possible, the presentation of subordinate assets 20033 is prohibited. It should be noted that a multi-layered structure in which another asset 30003 is subordinate to the subordinate asset 20033 may be adopted.

In order to specify the dependency relationship, it is sufficient to determine in advance whether the asset 30003 described in the dependency descriptor (FIG. 42) indicates the asset 30003 to which the dependency is made or the asset 30003 dependent on the asset. .. In the case of assets 20033 that are in a parallel relationship, the dependency descriptor (FIG. 42) is arranged assuming that both depend on the other.

As another method of specifying the dependency, the method of specifying the dependency in the dependency descriptor (FIG. 42) may be used. A dependency descriptor that specifies the dependency is shown in FIG. A parameter called dependency_type is specified to indicate the type of dependency on the dependent asset. The meaning of dependency_type is shown in FIG. When 0 is subordinate to the other party, 1 is subordinate to the other party. If there is a parallel relationship, specify that each is dependent on the other asset.

FIG. 46 shows an example of a management table for permission / prohibition of presentation. The assets of ID3 and 4 are subordinate to ID1 and 2, but since the assets of ID1 and 2 have been acquired, the presentation is permitted. On the other hand, the assets 9 and 10 are prohibited from being presented because the assets of the subordinate IDs 7 and 8 have not been acquired.

Although the assets of IDs 11 and 12 are in a mutually dependent relationship, they are allowed to be presented because they are aligned. On the other hand, the assets of ID 13 and 14 are also in a mutually dependent relationship, but since the assets of ID 14 have not been acquired, the presentation of the assets of ID 13 is prohibited. If an asset 30003 that cannot be presented occurs, an error display as shown in FIG. 41 may be performed.

In this way, by controlling the presentation while considering the dependency relationship, it is possible to prevent an abnormal presentation from being made when the control information is inconsistent.

<Operation example 11>
The broadcast receiving device 100 can present both the asset 30003 acquired from the broadcast wave and the asset 30003 acquired from the communication line (Internet), but depending on the state of the communication line, the asset 30003 via the communication line is acquired. It is possible that the broadcast receiving device 100 is not connected to the communication line in the first place. Therefore, normally, only the broadcast image of the broadcast wave is displayed in full screen using the default setting (FIG. 19A), and when the asset 30003 via the communication line is acquired, the asset 30003 in the area designated according to the setting of the LCT 30100. May be presented.

For example, the area setting of the LCT 30100 is as shown in FIG. 19B, the broadcast image is set to be presented in the area 0, and the asset 30003 via the communication line is set to be presented in the area 1 and the area 2. The case will be explained. If only the broadcast wave image can be received, the broadcast image is displayed in full screen using the default setting (Fig. 19A), and when the asset 30003 via the communication line can be acquired, the area setting of the LCT30100 is set. The broadcast video to be used is presented in the area 0 of FIG. 19B, and the asset 30003 via the communication line is presented in the area 1 and the area 2. In this case, the LCT 30100 may not be transmitted in the broadcast wave, but may be transmitted together with the asset 30003 via the communication line. By using the method of this operation example, it is possible to display according to the actual reception status of the program data. If only one of the assets 30003 via the communication line has been acquired and the other has not been acquired, the default setting (FIG. 19A) may be used. It is desirable to control so as to shift to the area setting of FIG. 19B when the assets 30003 via both communication lines are prepared.
(Example 4)

Hereinafter, Example 4 of the present invention will be described. The configuration and effects of this example shall be the same as those of Examples 1 to 3 unless otherwise specified. Therefore, in the following, the differences between the present embodiment and the first to third embodiments will be mainly described, and the common points will be omitted as much as possible to avoid duplication. In this embodiment, an operation example of handling the presentation area information set by the layout setting table (LCT) shown in FIG. 18 and handling of non-program content will be described.

[Hardware configuration of broadcast receiver]
Since the hardware configuration of the broadcast receiving device 100 is the same as that of the first embodiment, the description thereof will be omitted.

[Example of transformation operation of asset presentation]
<Operation example 1>
When changing channels using the electronic program guide (EPG), when a new program is selected on the EPG as shown by the broken line frame 30203 in FIG. 47, the new program is displayed while the EPG is displayed. If the LCT 30100 is acquired from the PA message 30000, the asset can be presented according to the presentation area information specified in the program when the program is displayed.

Alternatively, the presentation area information of each program is incorporated into the EPG data (the MH-EIT acquired from the broadcast wave or the communication network and other necessary data stored in a storage unit such as a memory). It is also possible to read the presentation area information of the newly changed program from the EPG data and acquire the presentation area information of the program earlier. In this case, it is not necessary to use another tuner, so the number of tuners can be reduced.

Alternatively, the presentation area information of each program may be distributed via the Internet, and the presentation area information of each program may be read first. In this case as well, the number of tuners can be reduced because it is not necessary to use another tuner.

In addition, when the EPG is displayed, the reduced program image may be displayed on the sub screen 30204, but even if the sub-asset is presented in this state, it will be difficult to see, so ignore the LCT setting of the program and ignore it. Only the main asset may be presented on the entire child screen 30204. Not limited to the sub-screen when the EPG is displayed, the LCT setting may be ignored in situations where the main asset is difficult to see due to the display of the sub-asset.

<Operation example 2>
The LCT30100 is repeatedly transmitted in order to support viewing from the middle of the program, but if the LCT30100 is not sent for a certain period of time, including the case where the broadcast reception is interrupted, the presentation area setting is valid for the receiver. It is determined that the presentation area information has disappeared, and the default setting (FIG. 19A) is set. When the reception is restarted, if the presentation area setting is changed, it is possible to prevent abnormal presentation due to the old presentation area setting remaining. Since the default setting is a setting that only presents the main asset, the presentation does not become abnormal regardless of the program.

<Operation example 3>
If there is inconsistency in the information of LCT30100 used in the program and there is no valid presentation area information, the default setting (FIG. 19A) is used to ensure the display of at least the main asset.

<Operation example 4>
If there are assets via the Internet in addition to the broadcast wave, the asset data via the Internet can be acquired, but if the reception of the broadcast wave is interrupted, the LCT30100 will not be acquired for a certain period of time, or a new presentation area. Maintain the presentation area setting and continue presenting assets via the Internet until the setting is established. By this method, it is possible to continue presenting an asset that can be partially presented even in an abnormal situation.

<Operation example 5>
When there are assets via the Internet in addition to the broadcast waves, the reception of the broadcast waves continues, but when the asset data via the Internet cannot be acquired, the presentation area setting is set by default (Fig. 19A). Change to and present only the main asset. For example, when the presentation area of the asset via the Internet is the area 1 and the area 2 of FIG. 19B and the presentation area of the broadcast screen is the area 0, when the presentation of the asset via the Internet is stopped, the part of the area 1 and the area 2 Becomes the background color and becomes unsightly. In such a case, if the broadcast screen (main asset) is displayed on the entire surface using the default setting (FIG. 19A), the screen can be used effectively without being unsightly.

In the above process, when the presentation area setting is changed to the default setting (FIG. 19A), an error message 30205 may be displayed indicating that data cannot be acquired from the Internet (FIG. 48).

[How to handle non-program content]
While watching a program, you may want to use content outside the program, such as content or applications on the Internet. The processing in such a case will be described.

First, whether or not to allow the presentation of content outside the program while viewing the program is set in the content control descriptor. The data structure of the content control descriptor is shown in FIG. This descriptor is placed in MPT30001 (FIGS. 17, 28). In FIG. 49, a parameter called contents_control_mode (content control mode) indicates permission / non-permission of presentation of non-program content.

FIG. 50 shows the meaning of the content control mode. In the case of mode 00, it means that it is not permitted, and otherwise it means that it is permitted. Then, three types of permission modes are provided. In the case of mode 01, it is permitted to present in the designated area. The area is specified by layout_number and region_number. In the case of mode 10, if the presentation of the program content is not hidden, the presentation of the non-program content is permitted. In the case of mode 11, the presentation of non-program content is permitted, and the presentation method is arbitrary.

FIG. 51 shows an example of mode 01. The program content is a main asset presented in the area 30206 and a sub-asset presented in the area 30207. The non-program content is displayed in the area 30208. Here, the presentation of the web browser 30209 is shown as an example. In the example of FIG. 51, the presentation area of the program content and the presentation area of the non-program content do not overlap, but these areas may be overlapped and the non-program content may be presented on the program content.

FIG. 52 shows an example of mode 10. It shows where the program content 30210 and the non-program content 30209 are presented. The presentation of the program content here is performed as a part of the screen 162 of the broadcast receiver as a full screen area designated by the LCT 30100. That is, the upper left position 30211 of the presentation area of the program content 30210 corresponds to the position of left_top_pos_x = 0 and left_top_pos_y = 0 in the LCT30100, and the lower right position 30212 corresponds to the position_down_pos_x = 100 in the LCT30100. To do. The position of the screen 162 of the broadcast receiver 100 to be set in the full screen area specified by the LCT is set in advance in the broadcast receiver 100 or set by the viewer. The non-program content may be presented at any position as long as it does not interfere with the presentation of the program content. Even if the areas do not overlap or overlap, they are presented behind the program content so that the presentation of the program content is not hidden (FIG. 53).

FIG. 54 shows an example of the mode 11. In this case, the relationship between the presentation of the program content and the non-program content is arbitrary. The non-program content may be presented so as to hide the presentation of the program content.

As described above, if the program content and the non-program content can be viewed at the same time, the convenience for the viewer is further enhanced.
(Example 5)

Hereinafter, Example 5 of the present invention will be described. The configuration and effects of this example shall be the same as those of Examples 1 to 4 unless otherwise specified. Therefore, in the following, the differences between the present embodiment and the first to fourth embodiments will be mainly described, and the common points will be omitted as much as possible to avoid duplication. Further, the broadcast receiving device of this embodiment will be described below assuming that it is a television receiver that supports both the MMT system and the MPEG2-TS system as the media transport system.

[Hardware configuration of broadcast receiver]
Since the hardware configuration of the broadcast receiving device 800 is the same as that of the second embodiment, the description thereof will be omitted.

[Asset type]
There are two media transport methods corresponding to assets, the MMT method and the MPEG2-TS method, which are distinguished by the location_type (location type) in MMT_general_location_info (FIG. 31). The type of location type is shown in FIG.

[MPEG2-TS packet synchronization control]
<Operation example 1>
Synchronous control of MMT packets is performed by a time stamp based on the time information of NTP (Network Time Protocol) shown in FIG. As the hardware configuration, the clock inside the receiver synchronized with the NTP shown in FIG. 7C is used.

On the other hand, in the MPEG2-TS method, synchronization control is performed by a time stamp based on time information called PCR (Program Lock Reference). The MPEG2-TS protocol stack is shown in FIG. 55. The PCR-based time system consists of an upper 33-bit counter that operates at 90 kHz and a lower 9-bit counter that operates at 27 MHz. The count of 300 in the lower 9 bits corresponds to 1 count in the upper 90 kHz. The upper 33-bit counter makes a round in about 26.5 hours, and the counter returns to 0 (FIG. 57). On the other hand, the clock synchronized with NTP consists of the upper 32 bits (in seconds) and the lower 32 bits (the part after the decimal point). Therefore, the clock based on NPT has a period that can be expressed for about 136 years, which is completely different from the PCR system as a system for time expression (Fig. 57).

Therefore, the receiver that processes MPEG2-TS packets has an internal clock synchronized with PCR in addition to the clock synchronized with NTP, and presents assets according to that clock, or the relationship between the time of PCR and NTP. Based on this, it is necessary to present the asset using the NTP clock. In addition, when performing precise presentation synchronization between MMT method assets and MPEG2-TS method assets, it is desirable to know the relationship between PCR and NTP time even if the internal clock is synchronized with PCR. ..

As a method of acquiring the time relationship between PCR and NTP, for example, the following method may be used. First, as a method of giving a correspondence between PCR and NTP time on the transmitting side, there is a method of describing the relationship for each MMT package table. That is, it is described as MPT_descriptor in the MPT of FIG. An example of the descriptor is shown in FIG. Here, the time stamp_offset parameter gives the difference between the time stamp by PCR and the time stamp by NTP (time stamp offset). Here, the time based on the NPT corresponding to the time when the counter of the PCR time stamp used in the asset group indicated by MPT is returned to 0 is shown in a 64-bit NTP time stamp format.

Explaining with reference to FIG. 57, when A in the figure is a PCR time stamp, B in the figure is a time stamp offset. If this time stamp offset value is used, the NTP-based time stamp value can be obtained by adding the PCR time stamp offset value to the time stamp offset. If the value of the NTP type time stamp is obtained, even if it is an MPEG2-TS type asset, the presentation process can be performed using the NTP type clock, and the presentation synchronization with the MMT type asset can be precisely performed. it can.

Further, the time stamp offset may be described for each asset corresponding to the MPEG2-TS method. In this case, it is described as asset_description in the MPT of FIG.

If the PCR time stamps used in the asset include those exceeding 0, the counter value as the PCR time stamp may have multiple times corresponding to 0. In that case, the time stamp offset may be described with the earliest time. As described in FIG. 57, there is a case where the PCR time stamp used in the asset has A'in addition to A. Also in this case, the value of B is used as the time stamp offset described in the descriptor. In the MPEG2-TS method asset presentation process, the value of the time stamp offset described in the descriptor is used at first, and as the presentation process progresses, the PCR time stamp is displayed in chronological order of the packets. When the value decreases, it is judged that the counter has completed one cycle, and the time offset value used for processing is divided by the time of one cycle of the PCR counter, that is, 2 to the 33rd power by 90 kHz (approximate value is 26.5 hours). Is added and processing is continued as a new time offset value. After that, if the PCR time offset value decreases during the process, the time stamp offset value may be updated in the same manner.

<Operation example 2>
Next, the process when the time stamp offset is not described on the transmitting side will be described. If the transmission data does not include the time stamp offset, when the PCR time stamp is received, the value of the NTP clock in the receiving device at the time of reception is read, and the PCR time stamp counter is returned to 0 in the same manner as above. The time of the NTP clock corresponding to the time stamp may be set as the value of the time stamp offset. After setting the time stamp offset value, the MPEG2-TS method asset presentation process may be performed in the same manner as when the time stamp offset value is described in the descriptor described above.

When watching a program at the time of broadcasting, even if the value of the time stamp offset is not described in the descriptor in the transmission data, it is possible to acquire it on the receiving device side as described above, for example. , When recording a program for playback and viewing, it is difficult to obtain the relationship between the values of the NTP time stamp and the PCR time stamp. Therefore, when recording a program in which MMT system assets and MPEG2-TS system assets coexist, it is desirable to record the descriptor of the time stamp offset at the same time. If the transmitting side does not describe the time stamp offset in the transmitting data, it is desirable that the receiving device acquires the value of the time stamp offset and adds it to the received data for recording / recording. These recorded / recorded data may be recorded in the storage unit 810 of FIG. 24, for example. At the time of viewing, these recorded data may be reproduced from the storage unit 810 and used.

As described above, by performing the asset presentation processing using the time stamp offset that gives the relationship between the NTP time stamp and the PCR time stamp, in a program in which MMT method assets and MPEG2-TS method assets coexist, it becomes more possible. Precise presentation synchronization processing becomes possible.

<Operation example 3>
The presentation area of the asset transmitted by the MMT method media transport method is specified by the MPU presentation area specification descriptor (Fig. 34), but the asset transmitted by the MPEG2-TS method or other media transport method. The presentation area of may also be specified by the MPU presentation area designation descriptor (FIG. 34). At that time, specifications that do not make sense depending on the type of asset, such as mpu_sequence_number, are ignored. This makes it possible to present assets without using a special designation method, which enhances convenience.

When the specification of mpu_sequence_number is ignored, the presentation area of the entire asset specified in the MP table (MPT) 30001 (FIGS. 17 and 28) follows the area specification of the MPU presentation area specification descriptor (FIG. 34).

<Operation example 4>
The presentation time of the asset transmitted by the MMT media transport method is specified by the MPU time stamp descriptor (Fig. 58), but the asset transmitted by the MPEG2-TS method or other media transport method The presentation time may also be specified in the MPU time stamp descriptor (FIG. 58). At that time, specifications that do not make sense depending on the type of asset, such as mpu_sequence_number, are ignored on the receiver side. In this case, the specified time is the presentation time at the beginning of the asset, and by using this time information, the difference between the NTP type time stamp and the PCR type time stamp can be obtained, and the asset transmitted by the MMT method. And the presentation of assets transmitted by the MPEG2-TS method can be synchronized. This makes it possible to present assets without using a special designation method, which enhances convenience.

<Operation example 5>
In operation example 3 and operation example 4, a method of using the MPU presentation area specification descriptor (FIG. 34) and the MPU time stamp descriptor (FIG. 58) for presenting an asset transmitted by a method other than the MMT method is shown. However, a dedicated descriptor may be used. As an example of the dedicated descriptor, the asset presentation area specification descriptor (FIG. 59) and the asset time stamp descriptor (FIG. 60) may be used. These descriptors do not include information that makes no sense other than the MMT method, such as mpu_sequence_number. This improves certainty without disrupting the process.

The descriptor for transmitting the time stamp offset or the descriptor for transmitting the presentation time of the asset other than the media transport method of the MMT method described in the above operation examples 1, 3, 4, and 5 is described in the MMT package table. It is transmitted as a child. In this case, the data is received by the tuner / demodulation unit 831 of FIG. 24 and transmitted as data decoded by the MMT decoding processing unit 841.

However, as a modification of this operation example, it may be transmitted as data received by the tuner / demodulation unit 832 and decoded by the MPEG2-TS decoding processing unit 842.

The video of the asset transmitted by the MMT method synchronized by the synchronization processing and the video of the asset transmitted by the MPEG2-TS method described in the fifth embodiment are, for example, the LCT described in the first to fourth embodiments. The video compositing unit 861 of FIG. 24 may generate and output a composite video so that the screen is presented in any of the divided regions based on the above.

Although the examples of the embodiments of the present invention have been described above with reference to Examples 1 to 5, the configuration for realizing the technique of the present invention is not limited to the above Examples, and various modified examples can be considered. For example, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. All of these belong to the category of the present invention. In addition, numerical values and messages appearing in sentences and figures are merely examples, and the effects of the present invention may not be impaired even if different ones are used.

The above-mentioned functions and the like of the present invention may be realized by hardware by designing a part or all of them by, for example, an integrated circuit. Further, it may be realized by software by interpreting and executing an operation program in which the microprocessor unit or the like realizes each function or the like. Hardware and software may be used together.

The software that controls the broadcast receiving device 100 may be stored in the ROM 103 and / or the storage (storage) unit 110 or the like of the broadcast receiving device 100 in advance at the time of product shipment. After the product is shipped, it may be acquired from another application server 500 or the like on the Internet 200 via the LAN communication unit 121. Further, the software stored in a memory card, an optical disk, or the like may be acquired via the expansion interface unit 124 or the like.

In addition, the control lines and information lines shown in the figure indicate what is considered necessary for explanation, and do not necessarily indicate all the control lines and information lines on the product. In practice, it can be considered that almost all configurations are interconnected.

100,800 ... Broadcast receiver, 100a ... Antenna, 101,801 ... Main control unit, 102,802 ... System bus, 103,803 ... ROM, 104,804 ... RAM, 110,810 ... Storage unit, 121,821 ... LAN communication unit, 124,824 ... expansion interface unit, 125,825 ... digital interface unit, 131,831,832 ... tuner / demodulation unit, 132 ... separation unit, 141 ... video decoder, 142 ... video color range conversion unit, 143 ... Voice decoder, 144 ... Character super decoder, 145 ... Subtitle decoder, 146 ... Subtitle synthesis unit, 147 ... Subtitle color range conversion unit, 151 ... Data decoder, 152 ... Cache unit, 153 ... Application control unit, 154 ... Browser unit, 155 ... Application color range conversion unit, 156 ... Sound source unit, 161,861 ... Video synthesis unit, 162,862 ... Monitor unit, 163,863 ... Video output unit, 164,864 ... Audio synthesis unit, 165,865 ... Speaker unit , 166, 866 ... Audio output unit, 170, 870 ... Operation input unit, 841 ... MMT decoding processing unit, 842 ... MPEG2-TS decoding processing unit, 200 ... Internet, 200r ... Router device, 200a ... Access point, 300t ... Radio waves Tower, 300s ... Broadcast satellite (or communication satellite), 300 ... Broadcast station server, 400 ... Service provider server, 500 ... Other application server, 600 ... Mobile telephone communication server, 600b ... Base station, 700 ... Mobile information terminal ..

Claims (1)

It is a broadcast receiver
A first reception step of receiving a TLV stream on a tuner, which stores an IP data flow in MMT format including video assets and audio assets related to a broadcast program, transmitted via a broadcast wave.
A second reception step of receiving an MPEG2-TS format stream related to a broadcast program transmitted via a broadcast wave with the tuner, and
A third reception step of receiving the MMT format IP data flow transmitted via the communication line in the communication unit, and
A fourth reception step of receiving an MPEG-DASH format stream transmitted via a communication line in the communication unit, and
A first decoding step of decoding a video asset included in the MMT format IP data flow stored in the TLV stream received by the tuner to generate a first video information, and a first decoding step.
A second decoding step of decoding the video data of the MPEG2-TS format stream received by the tuner to generate a second video information, and
A third decoding step of decoding the video asset included in the MMT format IP data flow received by the communication unit to generate a third video information, and
A fourth decoding step of decoding the video data included in the MPEG-DASH format stream received by the communication unit to generate a fourth video information, and
A video display step of displaying a video based on at least one of the first video information, the second video information, the third video information, and the fourth video information.
A first EPG generation step of generating a first EPG using the first program information included in the TLV stream received by the tuner, and
A second EPG generation step of generating a second EPG using the second program information included in the MPEG2-TS format stream received by the tuner, and
An EPG display step that displays at least one of the previous first EPG and the second EPG, and
With
When the character super is broadcast, the IP data flow stored in the TLV stream includes the character super asset.
Further, it has a character super display step for displaying a character super based on a character super asset included in the IP data flow stored in the TLV stream received by the tuner.
The character super display step is a screen for displaying the first or second EPG when the character super is broadcast in the selected service during the first or second EPG display in the EPG display step. Display the character supermarket in
Broadcast receiver.

Images