JP7379629B2 - Copy control method for broadcast program content - Google Patents

Description

The present invention relates to a content copy control method for broadcast programs.

One of the expanded functions of digital broadcasting services is data broadcasting, which transmits digital data via broadcast 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 Patent Document 1 listed below.

Japanese Patent Application Publication No. 2001-186486

In response to recent changes in the environment regarding content distribution, television receivers are also required to have various functional enhancements. In particular, there are many demands for the distribution of content and cooperative applications using broadband network environments such as the Internet, and demands for higher resolution/higher definition of video content. However, it is difficult to provide a high-value-added television receiver that can meet the above requirements by simply reusing the data broadcasting reception function of current television receivers, or by simply expanding the data broadcasting reception function, etc. .

An object of the present invention is to realize a content copy control method of a broadcast program that can execute functions with higher added value.

As a means for solving the above problem, the technology described in the claims is used.

By using the technology of the present invention, it is possible to realize a content copy control method of a broadcast program that can execute functions with higher added value.

1 is a system configuration diagram showing an example of a broadcast communication system including a broadcast receiving device according to a first embodiment. FIG. 2 is an explanatory diagram of an outline of an encoded signal in MMT. It is a block diagram of MPU in MMT. FIG. 2 is a configuration diagram of an MMTP packet in MMT. FIG. 2 is a conceptual diagram of a protocol stack of a broadcasting system using MMT. FIG. 3 is a hierarchical configuration diagram of control information used in a broadcasting system. This is a list of tables used in TLV-SI of the broadcasting system. This is a list of descriptors used in TLV-SI of the broadcasting system. This is a list of messages used in MMT-SI of the broadcasting system. This is a list of tables used in MMT-SI of the broadcasting system. This is a list (Part 1) of descriptors used in MMT-SI of the broadcasting system. This is a list (Part 2) of descriptors used in MMT-SI of the broadcasting system. FIG. 3 is a diagram showing the relationship between data transmission and each table in the broadcasting system. 1 is a block diagram of a broadcast receiving device according to a first embodiment. FIG. FIG. 2 is a configuration diagram of a logical plane structure of a presentation function of the broadcast receiving device according to the first embodiment. FIG. 2 is a system configuration diagram of clock synchronization/presentation synchronization of the broadcast receiving device according to the first embodiment. 1 is a software configuration diagram of a broadcast receiving device according to a first embodiment. FIG. FIG. 2 is a block diagram of a broadcast station server according to the first embodiment. FIG. 2 is a block diagram of a service provider server according to the first embodiment. 1 is a block diagram of a portable information terminal according to a first embodiment. FIG. 1 is a software configuration diagram of a portable information terminal according to a first embodiment. FIG. FIG. 3 is a diagram showing the data structure of MH-TOT of the broadcasting system. FIG. 2 is a diagram illustrating a format of a JST_time parameter of a broadcasting system. 3 is a diagram showing a method of calculating the current date from MJD of the broadcast receiving device according to the first embodiment. FIG. 1 is a diagram showing a configuration of an NTP format of a broadcasting system. FIG. 2 is a diagram showing a data structure of an MPU timestamp descriptor of a broadcasting system. FIG. 3 is a diagram showing a data structure of time information in a TMCC extended information area of a broadcasting system. FIG. 2 is an operation sequence diagram of the broadcast receiving device according to the first embodiment during channel scanning. FIG. 2 is a diagram showing a data structure of TLV-NIT of a broadcasting system. FIG. 2 is a diagram illustrating the data structure of a satellite distribution system descriptor for a broadcast system. FIG. 2 is a diagram showing a data structure of a service list descriptor of a broadcasting system. FIG. 2 is a diagram showing a data structure of AMT of a broadcasting system. FIG. 2 is an operation sequence diagram of the broadcast receiving device according to the first embodiment when selecting a channel. FIG. 3 is a diagram showing a data structure of MPT of a broadcasting system. FIG. 2 is a diagram showing a data structure of an LCT of a broadcasting system. FIG. 7 is a diagram illustrating an example of assignment of layouts to layout numbers based on LCT. FIG. 7 is a diagram illustrating an example of assignment of layouts to layout numbers based on LCT. FIG. 7 is a diagram illustrating an example of assignment of layouts to layout numbers based on LCT. FIG. 7 is a diagram illustrating an example of assignment of layouts to layout numbers based on LCT. FIG. 3 is a diagram illustrating an operation of exception handling of screen layout control based on LCT. FIG. 3 is a diagram illustrating an operation of exception handling of screen layout control based on LCT. FIG. 3 is a diagram showing the data structure of MH-EIT of the broadcasting system. 3 is a screen display diagram of an EPG screen of the broadcast receiving device according to the first embodiment. FIG. 3 is a screen display diagram of an EPG screen of the broadcast receiving device according to the first embodiment. FIG. 3 is a screen display diagram of an EPG screen of the broadcast receiving device according to the first embodiment. FIG. FIG. 3 is a screen display diagram of the broadcast receiving device according to the first embodiment when an emergency warning broadcast is displayed. FIG. 2 is a block diagram of a broadcast receiving device according to a second embodiment. FIG. 3 is a diagram illustrating inconsistency in current time display when switching broadcast services. FIG. 7 is a diagram illustrating the operation of selection control of a current time information reference source according to the second embodiment. FIG. 7 is a screen display diagram of an EPG screen of the broadcast receiving device according to the second embodiment. FIG. 7 is a screen display diagram of an EPG screen of the broadcast receiving device according to the second embodiment.

Examples of embodiments of the present invention will be described below with reference to the drawings.
(Example 1)

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

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

The router device 200r is connected to the Internet 200 through wired communication, the broadcast receiving device 100 through wired or wireless communication, and the mobile information terminal 700 through wireless communication. For the wireless communication, a method such as Wi-Fi (registered trademark) may be used. This allows each server device and other communication devices on the Internet 200, the broadcast receiving device 100, and the mobile information terminal 700 to mutually transmit and receive data via the router device 200r. Note that the communication between the broadcast receiving device 100 and the mobile information terminal 700 may be performed directly using 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 containing encoded data of broadcast programs, subtitle information, other applications, general-purpose data, and the like. A broadcasting satellite (or communication satellite) 300s receives broadcast waves transmitted from a radio tower 300t of a broadcasting station, performs appropriate frequency conversion, etc., and transmits the broadcast waves to an antenna 100a connected to a broadcast receiving device 100. It is a repeater that retransmits waves. Further, it is assumed that the broadcast station includes a broadcast station server 300. The broadcast station server 300 stores metadata such as broadcast programs (video content, etc.) and the program title, program ID, program summary, performer information, broadcast date and time of each broadcast program, and stores the video content and each metadata. , may be provided to service providers based on a contract. Note that the video 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 a service provider, and is capable of providing various services linked to broadcast programs distributed by broadcast stations. Further, the service provider server 400 stores, manages, and distributes video content and metadata provided from the broadcast station server 300, various contents and applications linked to broadcast programs, and the like. It also has a function to search for and provide a list of content, applications, etc. that can be provided in response to inquiries from television receivers and the like. Note that storage, management, and distribution of the content and metadata and storage, management, and distribution of the application may be performed by different server devices. The broadcast station and the service provider may be the same or different. A plurality of service provider servers 400 may be provided for different services. Furthermore, the functions of the service provider server 400 may also 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, operating programs, contents, data, and the like. There may be a plurality of other application servers 500 on the Internet 200.

Mobile telephone communication server 600 is connected to the Internet 200 and, on the other hand, to mobile information terminal 700 via base station 600b. The mobile phone communication server 600 manages telephone communication (calls) and data transmission and reception via the mobile phone communication network of the mobile information terminal 700, and connects the mobile information terminal 700 to each server device and other communication devices on the Internet 200. It is possible to send and receive data by communicating with. Communication between the base station 600b and the mobile information terminal 700 is performed using the W-CDMA (Wideband Code Division Multiple Access) (registered trademark) method, the GSM (Global System for Mobile communications) (registered trademark) method, or the L-CDMA (Wideband Code Division Multiple Access) (registered trademark) method. TE (Long Term Evolution) method , or other communication methods.

It is assumed that the mobile information terminal 700 has a function of telephone communication (call) and data transmission/reception via a mobile telephone communication network, and a function of wireless communication using 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 of the mobile telephone communication network and the mobile telephone communication server 600, and can be connected to the Internet 200. It is possible to send and receive data through communication with each server device and other communication devices. The access point 200a is connected to the Internet 200 by wired communication, and is also 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. Note that 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 via the base station 600b, the mobile phone communication server 600, the Internet 200, and the router device 200r. It may also be done through.

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

MPEG2-TS is characterized by multiplexing components such as video and audio that make up a program into one stream together with control signals and clocks. Since it is handled as one stream including the clock, it is suitable for transmitting one content over one transmission path with guaranteed transmission quality, and has been adopted in many conventional digital broadcasting systems. On the other hand, the MPEG2-TS function responds to changes in the environment related to content distribution, such as the recent diversification of content, the diversification of devices that use content, the diversification of transmission routes for content distribution, and the diversification of content storage environments. MMT is a newly developed media transport method because of the limitations of MT.

FIG. 2A shows an example of an outline of an encoded signal in MMT of this embodiment. As shown in the figure, the MMT of this embodiment has an MFU (Media Fragment Unit), an MPU (Media Processing Unit), an MMTP (MMT Protocol) payload, and an MMTP packet as elements constituting an encoded signal. shall be. The MFU is a format for transmitting video, audio, etc., and may be configured in units of NAL (Network Abstraction Layer) units or in units of access units. The MPU may be configured with MPU metadata that includes information regarding the overall configuration of the MPU, movie fragment metadata that includes information about encoded media data, and sample data that is encoded media data. Furthermore, it is assumed that the MFU can be extracted from the sample data. Furthermore, in the case of media such as video components and audio components, the presentation time and 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 section and an MMTP payload, and transmits MFU and MMT control information. It is assumed that the MMTP payload includes a payload header corresponding to the content (data unit) stored in the payload section. FIG. 2C shows an example of an overview of configuring an MFU from a video/audio signal, storing it in an MMTP payload, and configuring an MMTP packet. Note that in a video signal encoded using interframe prediction, it is desirable to configure the MPU in units of GOPs (Groups of Pictures). Furthermore, when the size of the MFU to be transmitted is small, one MFU may be stored in one payload section, or a plurality of MFUs may be stored in one payload section. Furthermore, when the size of the MFU to be transmitted is large, one MFU may be divided into a plurality of payload parts and stored. Furthermore, MMTP packets may be protected using techniques such as AL-FEC (Application Layer Forward Error Correction) and ARQ (Automatic Repeat Request) in order to recover from packet loss on the transmission path.

In the broadcasting system of this embodiment, MPEG-H HEVC (High Efficiency Video Coding) is used as a video encoding method, and MPEG-4 AAC (Advanced Audio Coding) or MPEG-4 ALS (Audio Lossless) is used as an audio encoding method. s Coding) shall be used. Encoded data such as video and audio of broadcast programs encoded by each of the above methods is in MFU or MPU format, and is further put on an MMTP payload, converted into MMTP packets, and transmitted as IP (Internet Protocol) packets. shall be. Further, data content related to broadcast programs may be in MFU or MPU format, and further may be placed on an MMTP payload to be converted into MMTP packets and transmitted as IP packets. Data content transmission methods include subtitle/superimposed transmission methods used for streaming data synchronized with broadcasting, application transmission methods used for data transmission asynchronous with broadcasting, and synchronous/asynchronous messages for applications running on TV receivers. Four types are provided: an event message transmission method used for notifications, and a general-purpose data transmission method that transmits other general-purpose data in a synchronous/asynchronous manner.

To transmit MMTP packets, UDP/IP (User Datagram Protocol/Internet Protocol) is used on the broadcast transmission path, and UDP/IP or TCP/IP (Transmission Control Protocol/Internet Protocol) is used on the communication line. Protocol) shall be used. . Further, in the broadcast transmission path, a TLV (Type Length Value) multiplexing method is used for efficient transmission of IP packets. FIG. 3 shows an example of the protocol stack of the broadcasting system of this embodiment. In the figure, (A) is an example of a protocol stack in a broadcast transmission path, 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), is provided. MMT-SI is control information indicating the structure of a broadcast program. It is assumed that the message is in the format of an MMT control message, is placed on an MMTP payload, is converted into an MMTP packet, and is transmitted as an IP packet. TLV-SI is control information regarding multiplexing of IP packets, and provides information for channel selection and correspondence information between IP addresses and services.

Also, in a broadcasting system using MMT, time information is transmitted to provide absolute time. Note that while MPEG2-TS indicates the component display time based on a different clock for each TS, MMT indicates the component display time based on Coordinated Universal Time (UTC). do. These mechanisms allow terminal devices to synchronize and display components transmitted from different transmission points through different transmission paths. In order to provide UTC, it is assumed that IP packets in NTP (Network Time Protocol) format are used.

[Control information for broadcasting system using MMT]
As described above, in the broadcasting system supported by the broadcast receiving apparatus 100 of this embodiment, the control information includes TLV-SI, which is 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 apparatus 100 to demultiplex IP packets multiplexed on a broadcast transmission path. TLV-SI consists of a "table" and a "descriptor". It is assumed that the "table" is transmitted in section format, and the "descriptor" is placed within the "table". MMT-SI is transmission control information indicating the configuration of an MMT package and information related to broadcasting services. MMT-SI consists of three layers: ``messages'' that store ``tables'' and ``descriptors,''``tables'' that have elements and attributes that indicate specific information, and ``descriptors'' that indicate more detailed information. shall be FIG. 4 shows an example of the hierarchical structure of control information used in the broadcasting system of this embodiment.

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

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

(2) AMT
An Address Map Table (AMT) provides a list of multicast groups of IP packets that constitute each service transmitted in a network.

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

<Descriptors used in TLV-SI>
FIG. 5B shows a list of "descriptors" placed in the TLV-SI of the broadcast system to which the broadcast receiving apparatus 100 of this embodiment supports. In this embodiment, it is assumed that the following is used as a "descriptor" of TLV-SI.

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

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

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

(4) Network name descriptor A network name descriptor describes a network name using character codes.

(5) Descriptors set by business operators In addition, it is possible for service providers etc. to prepare descriptors set independently.

<Messages used in MMT-SI>
FIG. 6A shows a list of "messages" used in MMT-SI of the broadcasting system to which the broadcasting receiving apparatus 100 of this embodiment supports. In this embodiment, it is assumed that the following is used as the MMT-SI "message".

(1) PA Message Package Access (PA) messages are 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 conditional access system.

(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 for the service provider etc. to prepare a message set independently.

<Tables 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 apparatus 100 of this embodiment. The table is control information having elements and attributes indicating specific information, and is stored in a message and transmitted in an MMTP packet. Note that the message that stores the table may be determined depending on the table. In this embodiment, it is assumed that the following table is used as the MMT-SI "table".

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

(2) PLT
A package list table (PLT) shows a list of IP data flows and packet IDs that transmit PA messages of MMT packages provided as broadcasting services, and IP data flows that transmit IP services. The PLT may be stored in the PA message.

(3) LCT
A layout configuration table (LCT) is used to associate layout information for presentation with layout numbers. The LCT may be stored in the PA message.

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

(5) EMM
The Entitlement Management Message (EMM) transmits individual information including contract information for each subscriber and key information for decrypting ECM (common information). EMMs may be stored in M2 section messages.

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

(7) DCM
The Download Control Message (DCM) transmits key-related information such as a key for decoding the transmission path encryption for downloading. DCM may be stored in M2 section messages.

(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-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 regarding the application and the activation state required for the application. The MH-AIT may be stored in the M2 section message.

(11) MH-BIT
The 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-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 contains information about the organized channel, such as the name of the organized 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) carries JST time and date (modified Julian date) information. MH-TOT may be stored in the M2 short section message.

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

(16) DDM Table The Data Directory Management Table (DDM table) provides the directory structure of the files that make up the application in order to separate the file structure of the application and the structure for file transmission. DDM tables may be stored in data transmission messages.

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

(18) DCC Table A data content configuration table (DCC table) provides configuration information of files as data contents in order to realize flexible and effective cache control. The DCC table may be stored in the data transmission message.

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

(20) Tables set by business operators In addition, it is possible for service businesses etc. to prepare tables set independently.

<Descriptors used in MMT-SI>
FIGS. 6C and 6D show a list of "descriptors" placed in the MMT-SI of the broadcast system to which the broadcast receiving apparatus 100 of this embodiment supports. The descriptor is control information that provides more detailed information, and shall be placed in the table. Note that the table in which the descriptors are arranged may be determined depending on the descriptor. In this embodiment, it is assumed that the following is used as a "descriptor" of MMT-SI.

(1) Asset Group Descriptor The asset group descriptor provides the group relationship of assets and their priority within the group. Asset group descriptors 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 layout specification. A background color specification descriptor may be placed in the LCT.

(4) MPU presentation area specification descriptor The MPU presentation area specification descriptor provides the position where the MPU is presented. The MPU presentation area specification descriptor may be placed in the MPT.

(5) MPU timestamp descriptor The MPU timestamp 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 A dependency descriptor provides an asset ID of an asset in a dependent relationship. Dependency descriptors may be placed in the MPT.

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

(8) Scrambling method descriptor The scrambling method descriptor provides information for identifying the encryption target and the type of encryption algorithm during scrambling. The scrambling descriptor may be placed in the 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 the MPT or CAT (MH).

(10) Emergency information descriptor (MH)
The emergency information descriptor (MH) is used when broadcasting an emergency warning. An 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 settings 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 based on ITU-T Recommendation H. 265|Used to describe the basic encoding parameters of ISO/IEC 23008-2 video streams (HEVC streams). The MH-HEVC video descriptor may be placed in the MPT.

(14) MH-Link Descriptor The MH-Link Descriptor identifies the service provided when the viewer requests additional information related to something specific listed in the program information system. The MH-link descriptor may be placed in the 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 are grouped when there is a relationship between them. The MH-Event Group Descriptor may be placed 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 placed 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 placed in the MH-EIT.

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

(19) Video component descriptor The video component descriptor indicates parameters and explanations regarding the video component, and is also used to express elementary streams in character format. The video component descriptor may be placed in the MPT or MH-EIT.

(20) MH-Stream Identification Descriptor The MH-Stream Identification Descriptor is used to label the component stream of a service and use this label to refer to the description content indicated by the video component descriptor in the MH-EIT. . 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-Parental Rate Descriptor The MH-Parental Rate Descriptor represents age-based viewing restrictions and is used to extend to include other restriction conditions. The MH-Parental Rate Descriptor may be placed in the MPT or MH-EIT.

(23) MH-Audio Component Descriptor The MH-Audio Component Descriptor indicates each parameter of the audio elementary stream, and is also used to express the elementary stream in character format. The MH-Audio Component Descriptor may be placed in the MPT or MH-EIT.

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

(25) MH-Series Descriptor The MH-Series Descriptor is used to identify series programs. The MH-series descriptor may be placed in the MH-EIT.

(26) MH-SI transmission parameter descriptor The MH-SI transmission parameter descriptor is used to indicate SI transmission parameters. The MH-SI transmission parameter descriptor may be placed 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 provider name together with the service format type using character codes. The MH-Service Descriptor may be placed in the MH-SDT.

(29) IP Data Flow Descriptor The IP data flow descriptor provides information on the IP data flows that constitute the service. The IP data flow descriptor may be placed in the MH-SDT.

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

(31) MH-Type descriptor The MH-Type descriptor indicates the type of file transmitted using 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 regarding the MPU or item. The MH-Info descriptor may be placed in a 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 a 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 Method Descriptor The MH-Data Encoding Method Descriptor is used to identify the data encoding method. The MH-data encoding scheme descriptor may be placed 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. A UTC-NPT reference descriptor may be placed in the EMT.

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

(38) MH-Local Time Offset Descriptor The MH-Local Time Offset Descriptor is used to set a constant offset value between the actual time (for example, UTC+9 hours) and the time displayed to the human system when summer time is implemented. The MH-Local Time Offset Descriptor may be placed in the MH-TOT.

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

(40) MH-Logo Transmission Descriptor The MH-Logo Transmission Descriptor is used to describe a simple logo character string, pointing to a CDT format logo, etc. The MH-Logo Transmission Descriptor may be placed in the MH-SDT.

(41) MPU extended timestamp descriptor The MPU extended timestamp descriptor provides the decoding time of an access unit within 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 attribute information of content downloaded using the MPU. The MPU download content descriptor may be placed in the MH-SDTT.

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

(44) MH-Application Descriptor The MH-Application Descriptor describes application information. The MH-Application Descriptor may be placed 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 location information of an application that depends on the transmission protocol. The MH-transmission protocol descriptor may be placed in the MH-AIT.

(46) MH-Simple Application Location Descriptor The MH-Simple Application Location Descriptor is written to indicate details of where to obtain an application. The MH-Simple Application Location Descriptor may be placed in the MH-AIT.

(47) MH-Application Boundary Authority Setting Descriptor The MH-Application Boundary Authority Setting Descriptor is written to set an application boundary and to set broadcast resource access authority 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 written to specify the startup priority of an application. The MH-Activation Priority Information Descriptor may be placed in the MH-AIT.

(49) MH-cache information descriptor The MH-cache information descriptor is written for use in cache control when caching and retaining the resources that make up the application when the application is expected to be reused. . The MH-Cache Information Descriptor may be placed in the MH-AIT.

(50) MH-Probabilistic application delay descriptor The MH-Probabilistic application delay descriptor is used to delay the timing of application control by a probabilistically set delay amount, assuming load distribution of server access for application acquisition. Describe it in The MH-Probabilistic Application Delay Descriptor may be placed in the MH-AIT.

(51) Link destination PU descriptor The link destination PU descriptor describes another presentation unit to which the presentation unit (PU) may transition. 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 files to be cached and locked in the presentation unit. Lock cache specification descriptors 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 unlocked cache specification descriptor may be placed in the DCC table.

(54) Descriptor set by the service provider In addition, it is possible for the service provider etc. to prepare a descriptor set independently.

<Relationship between data transmission and each control information in MMT method>
Here, the relationship between data transmission and typical tables in the broadcast system to which the broadcast receiving apparatus 100 of this embodiment supports will be explained using FIG. 6E.

In the broadcasting system supported by the broadcast receiving apparatus 100 of this embodiment, data transmission can be performed through a plurality of routes, such as a TLV stream via a broadcast transmission path and an IP data flow via a communication line. The TLV stream includes TLV-SI such as TLV-NIT and AMT, and an IP data flow that is an IP packet data flow. 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, an IP data flow may include a subtitle asset that includes a series of subtitle MPUs, a text super asset that includes a series of text superimpose MPUs, a data asset that includes a series of data MPUs, and the like. These various assets are associated in units called "packages" by an MPT (MMT package table) that is stored and transmitted in a PA message. Specifically, the MPT contains the package ID (corresponding to the "MMT_package_id_byte" parameter shown in FIG. 17 described later) and the asset ID of each asset included in the package (corresponding to the "asset_id_byte" parameter shown in FIG. 17 described later). The above-mentioned association is performed by describing the above.

The assets that make up the package can be only the assets in the TLV stream, but as shown in FIG. 6E, the assets that are transmitted in 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, which will be described later) in the MPT, so that the broadcast receiving apparatus 100 of this embodiment can refer to each asset. This can be achieved by making it possible to understand. Specifically, by changing the value of the "MMT_general_location_infonolocation_type" parameter placed in the location information,
(1) Data multiplexed in the same IP data flow as MPT (location_type=0x00)
(2) Data multiplexed in IPv4 data flow (location_type=0x01)
(3) Data multiplexed in IPv6 data flow (location_type=0x02)
(4) Data multiplexed in broadcast MPEG2-TS (location_type=0x03)
(5) Data multiplexed in MPEG2-TS format within IP data flow (location_type=0x04)
(6) Data in the specified URL (location_type=0x05)
It is possible to configure the broadcast receiving apparatus 100 to refer to various data transmitted through various transmission paths.

Among the above reference destinations, (1) is, for example, an IP data flow received via a digital broadcast signal received by the tuner/demodulator 131 of the broadcast receiving apparatus 100 of FIG. 7A, which will be described later. If the MPT is also 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. Furthermore, the above (2), (3), (5), and (6) are IP data flows that the LAN communication unit 121, which will be described later, receives via a communication line. In addition, the above (4) includes, for example, a reception function for receiving a digital broadcast signal using the MMT method and a digital broadcast signal using the MPEG2-TS method, as in a broadcast receiving apparatus 800 of a second embodiment shown in FIG. 24 described later. In the case of a broadcast receiving device that has both a reception function for receiving signals, digital broadcasting using the MPEG2-TS method is performed based on the MPT location information ("MMT_general_location_info()") included in the digital broadcasting signal using the MMT method. It can be used when referring to data multiplexed in an MPEG2-TS received by a reception function that receives a signal.

Although the data constituting the "package" is specified in this way, in the broadcasting system to which the broadcast receiving apparatus 100 of this embodiment supports, a series of data in the "package" unit is specified in the "service" unit of digital broadcasting. treated as

Furthermore, the MPT describes presentation time information for each MPU specified by the MPT (corresponding to the "mpu_presentation_time" parameter shown in FIG. 13B described later), and using the presentation time information, multiple MPUs specified by the MPT It becomes possible to display (display, output, etc.) the MPU in conjunction with a clock based on NTP, which is time information expressed in UTC. Presentation control of various data using the clock based on the NTP will be described later.

The data transmission method of this embodiment shown in FIG. 6E further includes the concept of "event." An "event" is a concept indicating a so-called "program" that is handled by the MH-EIT and sent in an M2 section message. Specifically, in the "package" pointed to by the event package descriptor stored in the MH-EIT, the duration time is calculated 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 a period of minutes (corresponding to the "duration" parameter shown in FIG. 21, which will be described later) is data included in the concept of the "event". The MH-EIT performs various processes for each "event" in the broadcast receiving apparatus 100 of this embodiment (for example, program guide generation processing, control of recording reservations and viewing reservations, copyright management processing such as temporary storage). It can be used for etc.

[Hardware configuration of broadcast receiving device]
FIG. 7A is a block diagram showing an example of the internal configuration of broadcast receiving device 100. The broadcast receiving apparatus 100 includes a main control section 101, a system bus 102, a ROM 103, a RAM 104, a storage section 110, a LAN communication section 121, an expansion interface section 124, a digital interface section 125, a tuner/demodulation section 131, and a separation section 132. , video decoder 141, video color gamut conversion unit 142, audio decoder 143, text 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 section 154, an application color gamut conversion section 155, a sound source section 156, a video synthesis section 161, a monitor section 162, a video output section 163, an audio synthesis section 164, a speaker section 165, an audio output section 166, and an operation input section 170. be done.

The main control section 101 is a microprocessor unit that controls the entire broadcast receiving apparatus 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 operational block within the broadcast receiving apparatus 100.

The ROM (Read Only Memory) 103 is a non-volatile memory that stores basic operating programs such as an operating system and other operating programs. used. The ROM 103 may store operation setting values necessary for the operation of the broadcast receiving apparatus 100. A RAM (Random Access Memory) 104 serves as a work area when basic operation programs and other operation programs are executed. 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 part of the storage area within the storage unit 110.

The storage unit 110 stores operating programs and operating settings of the broadcast receiving apparatus 100, personal information of the user of the broadcast receiving apparatus 100, and the like. Further, it is possible to store operating programs downloaded via the Internet 200 and various data created using the operating programs. Further, content such as moving images, still images, and audio obtained from broadcast waves or downloaded via the Internet 200 can also be stored. All or part of the functions of the ROM 103 may be replaced by a partial area of the storage section 110. Further, the storage unit 110 needs to hold stored information even when power is not supplied to the broadcast receiving apparatus 100 from the outside. Therefore, devices such as nonvolatile semiconductor element memories such as flash ROMs and SSDs (Solid State Drives), and magnetic disk drives such as HDDs (Hard Disc Drives) are used.

Note that each of the operating programs stored in the ROM 103 and the storage unit 110 can be added, updated, and expanded in function by downloading from each server device on the Internet 200.

A LAN (Local Area Network) communication unit 121 is connected to the Internet 200 via a router device 200r, and sends and receives data to and from each server device and other communication devices on the Internet 200. It is also assumed that the MMT data string (or part thereof) of the program transmitted via the communication line is acquired. The connection to the router device 200r may be a wired connection or a wireless connection such as Wi-Fi (registered trademark). It is assumed that the LAN communication unit 121 includes an encoding circuit, a decoding circuit, and the like. Furthermore, the broadcast receiving device 100 may further include other communication units such as a BlueTooth (registered trademark) communication unit, an NFC communication unit, an infrared communication unit, and the like.

The tuner/demodulator 131 receives broadcast waves 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 controller 101. Further, the tuner/demodulator 131 demodulates the received broadcast signal to obtain an MMT data string. Note that although the example shown in FIG. 7A illustrates a configuration in which there is one tuner/demodulator, the broadcast receiving apparatus 100 may have a tuner/demodulator for purposes such as displaying multiple screens simultaneously or recording a different program. It is also possible to have a configuration in which multiple devices are installed.

The separation unit 132 is an MMT decoder, and based on the control signal in the input MMT data string, real-time presentation elements such as a video data string, an audio data string, a character superimposition data string, a subtitle data string, etc. are sent to the video decoder 141, respectively. , audio decoder 143, text super decoder 144, subtitle decoder 145, and so on. The data input to the separation unit 132 includes an MMT data string transmitted via a broadcast transmission path and demodulated by the tuner/demodulation unit 131, and MMT data transmitted via a communication line and received by the LAN communication unit 121. It can be a row. Furthermore, the separation unit 132 reproduces the multimedia application and its component file-based data, and temporarily stores it in the cache unit 152. Furthermore, the separation unit 132 extracts general-purpose data and outputs it to the data decoder 151 in order to use it for data used by a player that presents data other than video/audio subtitles or for streaming data for an application. Further, the separation unit 132 may perform error correction, access restriction control, etc. for 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 video information. The video color gamut conversion unit 142 performs color space conversion processing on the video information decoded by the video decoder 141 as necessary for video synthesis processing in the video synthesis unit 161. The audio decoder 143 decodes the audio data string input from the separation unit 132 and outputs audio information. Furthermore, even if streaming data, such as MPEG-DASH (MPEG-Dynamic Adaptive Streaming over HTTP) format, obtained from the Internet 200 via the LAN communication unit 121 is input to the video decoder 141 and the audio decoder 143, good. Furthermore, a plurality of video decoders 141, video gamut converters 142, audio decoders 143, etc. may be provided in order to simultaneously decode a plurality of types of video data strings and audio data strings.

The character superimposition decoder 144 decodes the character superimposition data string input from the separation unit 132 and outputs character superimposition information. The subtitle decoder 145 decodes the subtitle data string input from the separation unit 132 and outputs subtitle information. The superimposed text information output from the superimposed text decoder 144 and the subtitle information output from the subtitle decoder 145 are combined in a subtitle synthesis section 146, and further processed in a subtitle color gamut conversion section 147 to be combined with the subtitle information output from the subtitle decoder 145. Color space conversion processing is performed as necessary for video composition processing. In addition, in this embodiment, among the services mainly consisting of text information that are presented at the same time as the video of the broadcast program, those related to the content of the video are called subtitles, and the other services are called superimposed text. do. In addition, if they are not distinguished, they are collectively referred to as subtitles.

The browser unit 154 uses the control information included in the MMT data string and the file system data that is the component of the multimedia application file acquired from the server device on the Internet 200 via the cache unit 152 or the LAN communication unit 121 to The information is presented in accordance with instructions from the application control unit 153 that interprets control information acquired from a server device on the Internet 200 via the communication unit 121. Note that 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 section 154 is further subjected to color space conversion processing in an application color gamut conversion section 155 as necessary for video composition processing in the video composition section 161. The browser section 154 also plays back application audio information by acting on the sound source section 156.

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

It is assumed that the presentation function of the broadcast receiving apparatus 100 of this embodiment has 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 a logical plane structure included in the presentation function of the broadcast receiving apparatus 100 of this embodiment. In the logical plane structure, a character superplane for displaying superimposed characters is placed at the forefront, and a subtitle plane for displaying subtitles is placed at the next layer. A multimedia plane for displaying broadcast video, multimedia applications, or a composite video thereof is placed on the third layer, and a background plane is placed on the backmost layer. The subtitle synthesis unit 146 and the video synthesis unit 161 perform drawing of superimposed text information on a text super plane, subtitle information on a subtitle plane, and drawing of video information, application information, etc. on a multimedia plane. Further, the background color is drawn on the background plane based on the LCT etc. included in the MMT-SI. Note that a plurality of third-layer multimedia planes can be prepared depending on the number of video decoders 141. However, even if there are multiple multimedia planes, the application information etc. output from the application color gamut conversion unit 155 are output only to the frontmost multimedia plane.

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

The expansion interface unit 124 is a group of interfaces for expanding the functions of the broadcast receiving device 100, and in this embodiment, it is configured of an analog video/audio interface, a USB (Universal Serial Bus) interface, a memory interface, etc. do. The analog video/audio interface inputs analog video signals/audio signals from an external video/audio output device, outputs analog video signals/audio signals to the external video/audio input device, and so on. The USB interface is connected to a PC or the like to send and receive data. Broadcast programs and content may be recorded by connecting an HDD. Additionally, a keyboard or other USB devices may be connected. The memory interface connects a memory card or other memory medium to send and receive data.

The digital interface unit 125 is an interface that outputs or inputs encoded digital video data and/or digital audio data. The digital interface section 125 can directly output the MMT data string demodulated by the tuner/demodulator 131, the MMT data string obtained via the LAN communication section 121, or mixed data of the MMT data strings. shall be taken as a thing. Further, the MMT data string inputted from the digital interface section 125 may be controlled to be inputted to the separation section 132. The digital content stored in the storage unit 110 may be output or stored in the storage unit 110 via the digital interface unit 125.

The digital interface section 125 is a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, etc., and data is output or input in a format that conforms to the DVI specifications, HDMI specifications, Display Port specifications, etc. It may be something that The data may be output or input in the form of serial data conforming to the IEEE1394 specification or the like. Alternatively, it may be configured as an IP interface that performs digital interface output via hardware such as Ethernet (registered trademark) or wireless LAN. In this case, the digital interface section 125 and the LAN communication section 121 may share the same hardware configuration.

The operation input unit 170 is an instruction input unit for inputting operation instructions to the broadcast receiving apparatus 100, and in this embodiment, a remote control reception unit that receives commands transmitted from a remote control (not shown) and button switches are arranged side by side. It shall consist of operation keys. It may be only one of them. Further, the operation input section 170 may be replaced by a touch panel placed over the monitor section 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 by a portable information terminal 700 having a remote control command sending function.

Note that, as described above, when the broadcast receiving apparatus 100 is a television receiver or the like, the video output section 163 and the audio output section 166 are not essential components of the present invention. In addition to a television receiver, the broadcast receiving device 100 may be an optical disk drive recorder such as a DVD (Digital Versatile Disc) recorder, a magnetic disk drive recorder such as an HDD recorder, an STB (Set Top Box), or the like. It may also be a PC (Personal Computer), a tablet terminal, a navigation device, a game machine, etc. that is equipped with 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, etc., the monitor section 162 and the speaker section 165 may not be provided. By connecting an external monitor and an external speaker to the video output section 163 and the audio output section 166 or the digital interface section 125, the same operation as the broadcast receiving apparatus 100 of this embodiment is possible.

[System configuration of clock synchronization/presentation synchronization of broadcast receiving device]
FIG. 7C is an example of a system configuration of clock synchronization/presentation synchronization in a broadcasting system to which the broadcast receiving apparatus 100 of this embodiment supports. In the broadcast system of this embodiment, UTC is transmitted in a 64-bit NTP time stamp format from the broadcast transmission system to a receiver (such as the broadcast receiving apparatus 100 of this embodiment). In the NTP timestamp format, "more than a second" in UTC is represented by 32 bits, and "less than a second" is represented by 32 bits. However, in reality, it is difficult to reproduce one second with 32-bit accuracy. For this reason, the system clock for synchronizing the video system and the system clock for operating the NTP format clock have a frequency of "2 to the 24th power" Hz (approximately 16.8 MHz), as shown in the same figure, for example. It is also possible to use a frequency of . Furthermore, considering the fact that the system clock in the conventional broadcasting system was 27MHz and that the hardware configuration of the receiver can be easily constructed, the It is desirable to adopt a power frequency as the system clock.

Furthermore, if the system clock is set to a frequency of a power of 2 between "2 to the 24th power" to "2 to the 28th power" as described above on the broadcast transmission system side and the receiver side, the reception 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 referenced by the system clock or the PLL (Phase Locked Loop) system for reproducing the NTP format clock are "0" or "1". It may be fixed to . That is, if the system clock is "2 to the n power" Hz (in the example of FIG. 7C, n = 24), the lower "32-n" bits of the NTP timestamp format are fixed to "0" or "1". You can do it like this. Alternatively, the receiver side may process it so as to ignore the lower "32-n" bits of the NTP timestamp format.

On the broadcast transmission system side, when 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 processed. Realize a synchronized transmission system clock. Further, the entire signal processing system is operated in synchronization with a system clock of "2 to the nth power" Hz. Furthermore, the output of the transmission system clock is periodically transmitted to the receiver side via the broadcast transmission path as time information in NTP length format.

On the receiver side, time information in the NTP long format is received via the broadcast transmission path, and the receiving system clock is reproduced by a PLL system based on a VCO of "2 to the nth power" Hz, similar to the broadcast transmission system side. Thereby, the receiving system clock becomes a clock synchronized with the broadcast 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 and the receiver is achieved, making stable signal reproduction possible. Become. Furthermore, the decoding time and 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, an MPU time stamp descriptor shown in FIG. 13B, which will be described later, is stored in the MPT stored in the PA message transmitted by the broadcast signal. The "mpu_sequence_number" parameter in the MPU timestamp descriptor in FIG. 13B indicates the sequence number of the MPU that describes the timestamp, and the "mpu_presentation_time" parameter indicates the MPU presentation time using 64-bit NTP. Shown in timestamp format. Therefore, the receiver can refer to the MPU time stamp descriptor stored in the MPT and control the presentation (display, output, etc.) timing for each MPU of video signals, audio signals, subtitles, superimposed text, etc. .

Note that when focusing on the control of the decoding timing and presentation timing for each presentation unit of the video/audio signals, etc. mentioned above, it is possible to synchronize the video/audio signals even with a clock of about "2 to the 16th power" Hz (approximately 65.5 KHz). can be secured, and in this case, it is not necessary to refer to the lower 16 bits of the NTP timestamp format written in the MPU timestamp descriptor or the like. In other words, when a "2 to the m power" Hz clock generated by frequency division of the system clock is used to control the decoding timing and presentation timing, the lower order of the NTP timestamp format described in the MPU timestamp descriptor etc. The "32-m" bit does not need to be referenced. Therefore, the lower "32-m" bits of the NTP timestamp format described in the MPU timestamp descriptor etc. may be fixed to "0" or "1".

[Software configuration of broadcast receiving device]
FIG. 7D is a software configuration diagram of the broadcast receiving apparatus 100 of this embodiment, and shows the software configuration in the ROM 103, RAM 104, and storage unit 110. In this embodiment, a basic operation program 1001 and other operation programs are stored in the ROM 103, and a reception function program 1002 and other operation programs are stored in the storage section 110. The storage unit 110 also includes a content storage area 1200 that stores content such as videos, still images, and audio, and an authentication storage area 1200 that stores authentication information necessary for accessing external mobile terminal devices and each server device. The information storage area 1300 and various other information storage areas for storing various information are provided.

The basic operation program 1001 stored in the ROM 103 is expanded into the RAM 104, and the main control section 101 further executes the expanded basic operation program to constitute a basic operation execution section 1101. Further, the reception function program 1002 stored in the storage unit 110 is similarly expanded to the RAM 104, and further, the main control unit 101 configures the reception function execution unit 1102 by executing the expanded reception function program. do. Furthermore, the RAM 104 is provided with a temporary storage area that temporarily holds data created when each operating program is executed, as needed.

In the following, to simplify the explanation, the process in which the main control unit 101 controls each operation block by expanding the basic operation program 1001 stored in the ROM 103 into the RAM 104 and executing it will be referred to as basic operation execution. The description will be made assuming that the unit 1101 controls each operation block. Similar descriptions are made for other operating programs.

The receiving function execution unit 1102 controls each operational block of the broadcast receiving apparatus 100 in order to reproduce components such as video and audio transmitted by the broadcasting system of this embodiment. In particular, the transport processing section 1102a mainly controls the MMT decoder function of the separation section 132, and distributes the video data string, audio data string, etc. separated from the MMT data string to the corresponding decoding processing sections. The AV decoding processing unit 1102b mainly controls the video decoder 141, audio decoder 143, and the like. The application processing unit 1102c mainly controls the cache unit 152, application control unit 153, browser unit 154, and sound source unit 156. The superimposed character processing unit 1102d mainly controls the superimposed character decoder 144. The subtitle processing unit 1102e mainly controls the subtitle decoder 151. 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 and generates an EPG screen. Based on the logical plane structure, the presentation processing unit 1102h converts the video gamut converter 142, the subtitle synthesizer 146, the subtitle gamut converter 147, the application gamut converter 155, the video synthesizer 161, and the audio synthesizer 164. Mainly controlled.

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

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

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

The storage unit 310 stores a basic operation program 3001, a broadcast content management/distribution program 3002, and a 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 of each broadcast program broadcast by a broadcast station. The metadata storage area 3300 stores metadata such as the program title, program ID, program summary, performers, broadcast date and time, copy control information related to each program content, etc. of each broadcast program.

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

In the following, to simplify the explanation, the process in which the main control unit 301 controls each operation block by expanding the basic operation program 3001 stored in the storage unit 310 into the RAM 304 and executing it will be described as a basic explanation. The description will be made assuming that the action execution unit 3101 controls each action block. Similar descriptions are made for other operating programs.

The broadcast content management/distribution execution unit 3102 manages the program content, etc. and each metadata of each broadcast program stored in the broadcast content storage area 3200 and the metadata storage area 3300, and manages the program content, etc. of each broadcast program, and each metadata. Controls the provision of metadata to service providers based on contracts. Further, the broadcast content management/distribution execution unit 3102 may, when providing the program content, etc. and each metadata of each of the broadcast programs to the service provider, as necessary. Authentication processing for the server 400 may also be performed.

The broadcast content transmission execution unit 3103 transmits the program content of the broadcast program stored in the broadcast content storage area 3200, the program title, program ID, program content copy control information, etc. of the broadcast program stored in the metadata storage area 3300. It manages the time schedule and the like when transmitting the included MMT data string from the radio tower 300t via the digital broadcast signal transmitter 360.

The LAN communication unit 321 is connected to the Internet 200 and communicates with the service provider server 400 and the like on the Internet 200. It is assumed that the LAN communication section 321 includes an encoding circuit, a decoding circuit, and the like. The digital broadcast signal transmitter 360 modulates an MMT data string composed of a video data string, an audio data string, a program information data string, etc. of program content of each broadcast program stored in the broadcast content storage area 3200. , and 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 includes a main control section 401, a system bus 402, a RAM 404, a storage section 410, and a LAN communication section 421.

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

The storage unit 410 stores a basic operation program 4001, a video content management/distribution program 4002, and an application management/distribution program 4004, and further stores a video content storage area 4200, a metadata storage area 4300, an application storage area 4400, and a user information storage area. A region 4500 is provided. The video content storage area 4200 stores program content of a broadcast program provided from the broadcast 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 from the broadcasting station server 300, metadata related to video content produced by the service provider, and the like. The application storage area 4400 stores various applications and the like for implementing services linked to broadcast programs, to be distributed in response to requests from each television receiver. The user information storage area 4500 stores information (personal information, authentication information, etc.) regarding users who are permitted to access the service provider server 400.

Further, the basic operation program 4001, video content management/distribution program 4002, and application management/distribution program 4004 stored in the storage unit 410 are each expanded to the RAM 404, and the main control unit 401 is A basic operation execution unit 4101, a video content management/distribution execution unit 4102, and an application management/distribution execution unit 4104 are configured by executing the content management/distribution program and the application management/distribution program.

In the following, to simplify the explanation, the process in which the main control unit 401 controls each operation block by expanding the basic operation program 4001 stored in the storage unit 410 into the RAM 404 and executing it will be described as a basic explanation. The description will be made assuming that the action execution unit 4101 controls each action block. Similar descriptions are made for other operating programs.

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

The LAN communication unit 421 is connected to the Internet 200 and communicates with the broadcast station server 300 on the Internet 200 and the broadcast receiving device 100 via the router device 200r. It is assumed that the LAN communication section 421 includes an encoding 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 mobile information terminal 700. The mobile information terminal 700 includes a main control section 701, a system bus 702, a ROM 703, a RAM 704, a storage section 710, a communication processing section 720, an expansion interface section 724, an operation section 730, an image processing section 740, an audio processing section 750, and a sensor section 760. , consists of.

The main control section 701 is a microprocessor unit that controls the entire mobile information terminal 700 according to a predetermined operating program. The system bus 702 is a data communication path for transmitting and receiving data between the main control unit 701 and each operational block within the mobile information terminal 700.

The ROM 703 is a memory in which basic operating programs such as an operating system and other operating programs are stored, and a rewritable ROM such as an EEPROM or a flash ROM is used, for example. The RAM 704 serves as a work area when executing basic operation programs 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 part of the storage area in the storage unit 710.

The storage unit 710 stores the operating program and operation setting values of the portable information terminal 700, the personal information of the user of the portable information terminal 700, and the like. Further, it is possible to store operating programs downloaded via the Internet 200 and various data created using the operating programs. Further, contents downloaded via the Internet 200 such as moving images, still images, and audio can also be stored. All or part of the functions of the ROM 703 may be replaced by a partial area of the storage unit 710. Furthermore, the storage unit 710 needs to retain stored information even when power is not supplied to the portable information terminal 700 from the outside. Therefore, for example, devices such as non-volatile semiconductor element memories such as flash ROMs and SSDs, and magnetic disk drives such as HDDs are used.

Note that each of the operating programs stored in the ROM 703 and the storage unit 710 can be added, updated, and expanded in function by downloading from each server device on the Internet 200.

The communication processing section 720 includes a LAN communication section 721, a mobile telephone network communication section 722, and an NFC communication section 723. The LAN communication unit 721 is connected to the Internet 200 via the router device 200r and the access point 200a, and sends and receives data to and from each server device and other communication devices on the Internet 200. It is assumed that the connection with the router device 200r and the access point 200a is 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 through wireless communication with the base station 600b of the mobile telephone communication network. The NFC communication unit 723 performs wireless communication when in close proximity to a corresponding reader/writer. It is assumed that the LAN communication section 721, the mobile telephone network communication section 722, and the NFC communication section 723 each include an encoding 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 assumed to be composed of a video/audio interface, a USB interface, a memory interface, and the like. The video/audio interface inputs video signals/audio signals from an external video/audio output device, outputs video signals/audio signals to the external video/audio input device, and so on. The USB interface is connected to a PC or the like to send and receive data. Additionally, a keyboard or other USB devices may be connected. 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, and in this embodiment, it is composed of a touch panel 730t arranged over a display unit 741 and an operation key 730k arranged with button switches. shall be taken as a thing. It may be only one of them. The portable information terminal 700 may be operated using a keyboard or the like connected to the expansion interface section 724. The portable information terminal 700 may be operated using a separate terminal device connected by wired communication or wireless communication. That is, the portable information terminal 700 may be operated from the broadcast receiving device 100. Further, the touch panel function may be provided in the display section 741.

The image processing section 740 includes a display section 741, an image signal processing section 742, a first image input section 743, and a second image input section 744. The display unit 741 is, for example, a display device such as a liquid crystal panel, and provides image data processed by the image signal processing unit 742 to the user of the mobile information terminal 700. The image signal processing section 742 includes a video RAM (not shown), and the display section 741 is driven based on image data input to the video RAM. Furthermore, the image signal processing unit 742 has 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 light input from a lens into an electrical signal using an electronic device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor. , a camera unit that inputs image data of surroundings and objects.

The audio processing section 750 includes an audio output section 751, an audio signal processing section 752, and an audio input section 753. The audio output unit 751 is a speaker, and provides the user of the mobile information terminal 700 with an audio signal processed by the audio signal processing unit 752. The voice input unit 753 is a microphone, and converts the user's voice into voice data and inputs the voice data.

The sensor unit 760 is a group of sensors for detecting the state of the mobile information terminal 700, and in this embodiment, it includes a GPS receiving unit 761, a gyro sensor 762, a geomagnetic sensor 763, an acceleration sensor 764, an illuminance sensor 765, and a proximity sensor 766. , consists of. These sensor groups make it possible to detect the position, inclination, direction, movement, surrounding brightness, proximity of surrounding objects, etc. of the mobile information terminal 700. Furthermore, the mobile information terminal 700 may further include other sensors such as an atmospheric 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 Assistant) or a notebook PC. Further, it may be a digital still camera, a video camera capable of shooting moving images, a portable game machine, a navigation device, or other portable digital equipment.

Note that 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 a sensor section 760, but even if the configuration does not include these, this embodiment does not impair its effectiveness. Furthermore, configurations not shown may be further added, such as a digital broadcast reception function and an electronic money payment function.

[Software configuration of mobile information terminal]
FIG. 10B is a software configuration diagram of the portable information terminal 700 of this embodiment, showing the software configuration in the ROM 703, RAM 704, and storage unit 710. In this embodiment, a basic operation program 7001 and other operation programs are stored in the ROM 703, and a cooperation control program 7002 and other operation programs are stored in the storage unit 710. The storage unit 710 also includes a content storage area 7200 that stores contents such as videos, still images, and audio, an authentication information storage area 7300 that stores authentication information necessary for accessing the television receiver and each server device, It is assumed that various information storage areas are provided to store various other information.

The basic operation program 7001 stored in the ROM 703 is expanded into the RAM 704, and the main control unit 701 further executes the expanded basic operation program to constitute a basic operation execution unit 7101. Further, the cooperation control program 7002 stored in the storage unit 710 is similarly expanded to the RAM 704, and further, the main control unit 701 configures the cooperation control execution unit 7102 by executing the expanded cooperation control program. Furthermore, the RAM 704 is provided with a temporary storage area that temporarily holds data created when each operating program is executed, as needed.

In the following, to simplify the explanation, the process in which the main control unit 701 controls each operation block by expanding the basic operation program 7001 stored in the ROM 703 into the RAM 704 and executing it will be referred to as basic operation execution. The description will be made assuming that the unit 7101 controls each operation block. Similar descriptions are made for other operating programs.

The cooperation control execution unit 7102 manages device authentication and connection, transmission and reception of various data, etc. when the mobile information terminal 700 performs a cooperation operation with the television receiver. Further, the cooperation control execution unit 7102 is provided with a browser engine function for executing an application that works in conjunction with the television receiver.

Each of the operating programs may be stored in advance in the ROM 703 and/or the storage unit 710 at the time of product shipment. 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 after the product is shipped. Further, each of the operating programs stored in a memory card, an optical disk, or the like may be acquired via the expansion interface section 724 or the like.

[Broadcast receiving device time management]
The broadcast receiving device of this embodiment has two types of time management functions. The first time management function is a time management function based on NTP, and is as already explained using FIG. 7C. The second time management function is a time management function based on MH-TOT, and the time is managed based on the time information transmitted by MH-TOT described in FIG. 6B.

An example of the structure of time information transmitted by NTP is shown in FIG. 13A. Further, an example of the data structure of the MPU time stamp descriptor is shown in FIG. 13B. The "reference_timestamp" parameter, the "transmit_timestamp" parameter, etc. in the NTP format are 64-bit NTP length format time data, and the "mpu_presentation_time" parameter in the MPU timestamp descriptor is also a 64-bit NTP timestamp. This is time data in the format. The time data in the NTP length format and the time data in the NTP timestamp format are data in which "more than a second" in UTC is represented by 32 bits, and "less than a second" is represented by 32 bits. That is, time information in the NTP format can transmit time information up to "less than a second". Furthermore, since time information in the NTP format is expressed in UTC, unlike clock management in conventional digital broadcasting, the communication line path (for example, communication that can be received by the LAN communication unit 121 in FIG. 7A It is also possible to match the NTP contained in the signal received over the network.

On the other hand, the information transmitted by MH-TOT is as follows. It is assumed that the broadcast receiving apparatus 100 can obtain the current date and Japan Standard Time using MH-TOT. FIG. 11A shows an example of the data structure of MH-TOT. The broadcast receiving apparatus 100 can obtain the current date and time from the "JST_time" parameter of the MH-TOT. As shown in Figure 11B, the "JST_time" parameter consists of the lower 16 bits of the encoded data of the current date using Modified Julian Date (MJD) and six 4 bits representing Japan Standard Time (JST). It is assumed that 24 bits of information expressed in bit binary coded decimal (BCD) are included. The current date can be calculated by performing a predetermined operation on the 16-bit encoded data of the MJD. The six 4-bit binary coded decimal numbers represent "hour" in two decimal digits by two 4-bit binary coded decimal numbers, and the hour is expressed in decimal 2 digits by the next two 4-bit binary coded decimal numbers. The digits represent minutes, and the last two 4-bit binary coded decimal numbers represent seconds in two decimal digits.

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

The broadcast receiving device 100 of this embodiment performs a time management function based on NTP, which is time information expressed in UTC, and synchronizes decoding and display of video, audio, subtitles, superimposed text, and other presentation data, which are contents of broadcast signals. By using this method, more accurate synchronization processing can be achieved. Furthermore, by referring to the information in UTC notation rather than the clock notation of the broadcasting station, the content of the broadcast signal, such as video, audio, subtitles, superimposed text, or other data received in the broadcast signal, can be obtained through the communication line path. It is also possible to perform decoding and display synchronization processing with video, audio, subtitles, superimposed text, or other data.

Furthermore, the broadcast receiving device of this embodiment has a time management function based on "JST_time" that includes 24-bit information expressed in six 4-bit binary coded decimal numbers of MH-TOT, and can display the current time to the user. It may be used for each process that handles the process or the MH-event information table (MH-EIT) described in FIG. 6B. Generally, in the process of presenting the current time to a user in a broadcast receiving device, precision to the sub-second level is rarely required. In addition, each time information described in the MH-Event Information Table (MH-EIT) is expressed in six 4-bit binary coded decimal numbers, similar to the EIT of conventional digital broadcasting transmitted in the MPEG2-TS system. This 24-bit information is stored in two decimal digits for hours, minutes, and seconds. Therefore, the time management function based on MH-TOT in the broadcast receiving apparatus 100 of this embodiment is easily compatible with processing using MH-EIT. Specifically, the processing using MH-EIT includes program guide generation processing (described later), control of recording reservations and viewing reservations, and copyright management processing such as temporary storage. This is because it is rare for any processing to require precision of less than a second, and precision of one second is sufficient.

In addition, the program guide generation process, control of recording reservations and viewing reservations, and copyright management processes such as temporary storage are functions that are also installed in receivers of digital broadcasting systems using the conventional MPEG2-TS system. . Therefore, the broadcasting system of this embodiment also differs from the conventional MPEG2-TS digital broadcasting system in processing such as program guide generation processing, control of recording reservations and viewing reservations, and copyright management processing such as temporary storage. If configured so that it can handle consistent time management processing, a broadcast receiving device can be configured that has both the conventional MPEG2-TS format digital broadcast reception function and the MMT format digital broadcast reception function. At the same time, there is no need to design separate processing algorithms for these processes (program guide generation, control of recording and viewing reservations, copyright management such as temporary storage, etc.), reducing costs. can do.

In addition, even if the receiver has only the reception function of MMT digital broadcasting without the conventional MPEG2-TS digital broadcasting reception function, it is possible to generate program guides, control recording reservations and viewing reservations, etc. Without having to create completely new algorithms for processing such as temporary storage and other copyright management processing, it is possible to reuse algorithms for functions that are also installed in receivers of digital broadcasting systems that use the conventional MPEG2-TS system. It can be developed at lower cost.

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

As explained above, the broadcast receiving apparatus 100 of this embodiment has a time management function using two types of time information with different accuracy. One time information is time information in a notation consistent with the conventional digital broadcasting system, and the other time information is time information with higher resolution than the one time information, and the latter time information is used in the broadcast signal. By using the synchronization processing of each content data, it is possible to realize more advanced information presentation processing than conventional broadcasting systems. By using it for rights management processing, etc., it is possible to provide a broadcast receiving device at a low cost.

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

[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 explained using FIG. information regarding the expected delay time in time information transmission is included in the broadcast signal and transmitted, and the broadcast receiving device 100 is configured to use the information regarding the expected delay time to correct the system clock of the time management function based on NTP. Also good.

At this time, the information regarding the estimated delay time may be configured to be transmitted not within the TLV multiplexed stream shown in FIG. 3(A) but within a TMCC (Transmission and Multiplexing Configuration Control) area outside the TLV multiplexed stream. good. If transmitted within the TMCC area, it becomes possible for the broadcast receiving apparatus 100 to extract information regarding the estimated delay time without performing separation processing (demuxing processing) of the TLV multiplexed stream. That is, it is possible to obtain information that is not easily affected by the delay caused by the separation processing in the broadcast receiving apparatus 100, and therefore, it is possible to perform highly accurate system clock correction processing. An example of the data structure of time information transmitted by the TMCC signal will be described using FIG. 13C. For example, the time information may be stored in the TMCC extended information area and transmitted. In the time information of the TMCC extended information area in FIG. 13C, the "delta" parameter is a 32-bit value that represents the expected 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. Represented as a signed fixed-point number. Note that the upper 16 bits describe the integer part, and the lower 16 bits describe the decimal point. The "transmit_timestamp" parameter is a transmission timestamp, and describes the time at which this TMCC signal is sent from the server device in NTP timestamp 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 apparatus 100 of the present embodiment uses information regarding the estimated delay time described in the time information stored in the TMCC extended information area and transmitted (for example, the above-mentioned "delta"). parameter and/or the "transmit_timestamp" parameter), the system clock of the NTP-based time management function used for synchronization processing of each content data of the broadcast signal can be corrected with higher accuracy.

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

As described above, the broadcast receiving apparatus 100 of this embodiment has a time management function that acquires the current date and Japan Standard Time from the information transmitted by MH-TOT and manages the time. The current date and Japan standard time obtained from the information transmitted by MH-TOT are superimposed on video information, application information, etc. by the video composition section 161 of the broadcast receiving device 100, and are sent to the monitor section 162 and the video output section 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 apparatus 100 can obtain the current date and time from the "JST_time" parameter of the MH-TOT.

However, since the above-mentioned "JST_time" parameter uses only the lower 16 bits of the MJD encoded data, an overflow occurs after "April 22, 2038", and the predetermined calculation cannot express dates after ``April 23, 2038''. Therefore, in the second modification of this embodiment, dates after "April 23, 2038" are expressed by switching the calculation method depending on whether the MJD value is greater than or equal to a predetermined value and when it is less than a predetermined value. It shall be controlled so that it can be carried out.

FIG. 12 shows an example of a first calculation method used when the value of MJD is greater than or equal to a predetermined value, and an example of a second calculation method used when the value of MJD is less than the predetermined value. For example, if the predetermined value is "32768 (0x8000)", if the MJD is "32768" or more, the current date is calculated using the first calculation method, and if the MJD is less than "32768", the current date is calculated. calculates the current date using the second calculation method. Note that the case where MJD is less than "32768" is equivalent to the case where the most significant bit of the 16-bit data of MJD is "0". As a result, in the broadcast receiving device 100 of this embodiment, it is possible to express dates after "April 23, 2038." However, the predetermined value can be set arbitrarily, and the predetermined value may be set to "16384 (0x4000)", "49152 (0xC000)", etc. The conditions for switching the calculation method may be when the upper two bits of the 16-bit data of the MJD are "00", or when the upper two bits of the 16-bit data of the MJD are not "11". Note that if the predetermined value is set to ``32768'' and the above-mentioned method is used, dates before ``September 4, 1948'' cannot be expressed, but this does not pose any particular problem in practical use as a television receiver. .

Furthermore, instead of switching between the first calculation method and the second calculation method according to the comparison result between MJD and the predetermined value, the "reserved" parameter in the MH-TOT data structure shown in FIG. The first calculation method and the second calculation method may be switched depending on a partially or completely replaced flag or a newly added flag. For example, 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, the flag is set to "1". However, if it does not indicate a date after "April 23, 2038," "0" may be set. Then, when the flag is "1", the second calculation method shown in FIG. 12 is used, and when the flag is "0", the first calculation method is used. Alternatively, a new descriptor having the same meaning as the flag may be prepared and placed in the MH-TOT.

Further, in the broadcasting system of this embodiment, as described above, absolute time in the NTP format is transmitted, and the broadcast receiving device 100 of this embodiment has a time management function based on the NTP. Furthermore, in the broadcast receiving apparatus 100 of the present embodiment, the decoding timing and presentation for each presentation unit of video/audio signals can be determined by referring to the NTP timestamp written in the MPU timestamp descriptor set for each MPU. It controls the timing. 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 apparatus 100 of the present embodiment, the "reference_timestamp" parameter, the "transmit_timestamp" parameter, the "mpu_presentation_time" parameter, etc. are referred to, and the above-mentioned It is also possible to select which of the first calculation method and the second calculation method to use. That is, for example, if the most significant bit of the 64-bit NTP length format time data is "0", the second calculation method is used, and if it is not "0", the first calculation method is used. You can do something like, ``do,'' etc.

By any of the above methods, the broadcast receiving apparatus 100 of this embodiment can represent dates after "April 23, 2038."

[Broadcast receiving device tuning process (initial scan)]
The AMT of the broadcasting system of this embodiment provides a list of multicast groups for IP packets in order to receive IP packets transmitted using the TLV multiplexing method as indistinguishably as possible from IP packets transmitted over a communication line. shall be taken as a thing. Multiple IP multicast groups can be listed for one service identification. Additionally, address masks can be used to efficiently describe consecutive IP addresses.

In the broadcast receiving apparatus 100 of this embodiment, the list of services acquired from the TLV-NIT is stored in a nonvolatile memory such as the ROM 103 or the storage unit 110 during channel scanning during initial settings or when rescanning for setting changes. Further, a list of IP multicast groups corresponding to each service can be stored in the nonvolatile memory in association with each service as IP related information. do. By storing the list of services and IP-related information in non-volatile memory so that they can be referenced at all times, there is no need to re-obtain TLV-NIT or AMT when switching channels, etc., making the acquisition of broadcast content more efficient. It becomes possible to do so.

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

When a channel scan is started, the reception function execution unit 1102 sets an initial frequency value for the tuner/demodulation unit 131 and instructs it to perform tuning to the frequency value (S101). When the tuner/demodulator 131 successfully locks to the set frequency value (S102: Yes), the reception function execution unit 1102 acquires the TLV-NIT from the received signal (S103).

If the TLV-NIT acquired in the process of S103 is valid data (S104: Yes), the reception function execution unit 1102 acquires information such as the TLV stream ID and 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 on the TLV stream ID can be obtained from the "tlv_stream_id" parameter, and the information on the original network ID can be obtained from the "original_network_id" parameter. Furthermore, distribution system information regarding the physical conditions of the broadcast transmission path corresponding to each TLV stream ID/original network ID is acquired from the distribution system descriptor (S106), and a list of service IDs is acquired from the service list descriptor (S106). S107). FIG. 15B shows an example of the data structure of a satellite distribution system descriptor. FIG. 15C shows an example of the data structure of a service list descriptor. Note that if the TLV-NIT has a plurality of different data such as TLV stream ID, original network ID, distribution system information, service ID list, etc., 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, original network ID, distribution system information, and list of service IDs acquired in the processes of S105 to S107, and The service list is stored in the ROM 103 or the storage unit 110 (updated when 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. Note that if the AMT has a list of IP multicast groups related to multiple service IDs, the process of S110 is repeated. If there are multiple AMTs that have lists 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 in the ROM 103 or the storage unit 110, etc., as IP related information in association with the service ID (updated at the time of rescanning). (S111).

Note that if the tuner/demodulator 131 does not succeed in locking to the set frequency value in the process of S102 (S102: No), and the TLV-NIT acquired in the process of S103 is not valid data. In this case (S104: No), the processes of S105 to S111 are not performed.

After completing the process of S111, if the frequency value set in the tuner/demodulator 131 is the final frequency value of the channel scan range (S112: Yes), the reception function execution unit 1102 ends the process. 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/demodulator 131 is increased (S113), and the processing of S102 to S111 is performed. repeat. Note that if one TLV-NIT can acquire service IDs related to all the services that make up the broadcast network, and can also acquire an AMT that has a list of IP multicast groups related to the service ID, steps S112 to S113 are performed. No processing required.

Through the series of processes described above, the broadcast receiving apparatus 100 of this embodiment can check the list of services (service list) that constitute the broadcast network during channel scanning during initial settings or when rescanning for setting changes. At the same time as creating/updating, a list of IP multicast groups (IP related information) corresponding to each service can be created/updated, and further stored in a non-volatile memory such as the ROM 103 or the storage unit 110.

Note that rescanning for changing the settings is automatically performed when it is detected that there has been a change in the information in the table by referring to the "version_number" parameter of TLV-NIT or AMT. It's okay. When a change in the "version_number" parameter of either TLV-NIT or AMT is detected, only the information regarding the table in which the change in the parameter was detected may be automatically updated. However, when the above-mentioned automatic update is performed, it is desirable to notify the user that a rescan has been automatically performed. Further, the user may be notified that there has been a change in the information in the table, and the user may be allowed to select whether or not to perform the rescan.

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

When the user operates a remote controller (not shown) to instruct channel switching, the receiving function execution 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 the AMT from the received signal of the tuner/demodulation unit 131. If the AMT is successfully acquired within the predetermined time (S202: Yes), information regarding a 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 the predetermined time (S202: No), by referring to the IP-related information stored in the ROM 103 or the storage unit 110 (S203), the IP address corresponding to the service ID is determined. Information regarding a list of multicast groups is acquired (S204). Note that the determination process in S202 may not be performed, and the IP related information stored in the ROM 103, the storage unit 110, or the like may always be referred to.

Next, the reception function execution unit 1102 starts acquiring TLV-NIT from the received signal of the tuner/demodulation unit 131. If the TLV-NIT is successfully acquired within the predetermined time (S205: Yes), 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, if the TLV-NIT is not successfully acquired within the predetermined time (S205: No), by referring to the service list stored in the ROM 103 or the storage unit 110 (S206), the service ID corresponding to the service ID is determined. Distribution system information for acquiring the IP data flow is acquired (S207). Note that the service list stored in the ROM 103 or the storage unit 110 may be always referred to without performing the determination process in S205. After acquiring the distribution system information in the process of S207, the reception function execution unit 1102 controls the tuner/demodulation unit 131 using the frequency value specified by the acquired distribution system information, and uses the frequency value specified by the acquired distribution system information to (S208), extracts an MMT data string from the received IP data flow, and outputs it to the separation unit 132.

In the separation unit 132, the transport processing unit 1102a acquires the MMTP packet whose packet ID is “0” from the input MMT data string (S209), and further acquires the 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 checks whether 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, if the lower 16 bits of the "MMT_package_id_byte" parameter have the same value as the service ID (S211: Yes), the MMTP packet whose packet ID is "0" It is determined that the packet is an MMTP packet having data of a program corresponding to the service ID, and an MFU is acquired based on the information possessed by the acquired MPT (S216).

On the other hand, if the lower 16 bits of the "MMT_package_id_byte" parameter do not have the same value as the service ID (S211: No), the MMTP packet whose packet ID is "0" is an MMTP packet containing program data corresponding to the service ID. It is determined that it is not a packet. In this case, the transport processing unit 1102a acquires the PLT again (S212), and by checking the acquired PLT, determines the packet ID of the MMTP packet transmitting the MPT having the "MMT_package_id_byte" parameter corresponding to the service ID. (set as x) is confirmed (S213). Further, the transport processing unit 1102a obtains an MMTP packet whose packet ID is "x" from the input MMT data string (S214), and obtains the MPT included in the obtained MMTP packet (S215). Furthermore, an MFU is acquired based on the information possessed by the acquired MPT (S216).

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

After acquiring the MFU in the process of S216, the transport processing unit 1102a extracts encoded video data, encoded audio data, etc. from the acquired MFU, and outputs it to the video decoder 141, audio decoder 143, etc. 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-mentioned processing is well known, detailed explanation will be omitted.

Through the series of processes described above, the broadcast receiving apparatus 100 of this embodiment can perform a channel selection (channel switching) operation. In particular, as explained using FIGS. 14 and 16, service lists and IP-related information are created during channel scanning during initial settings or when rescanning for setting changes, and the ROM 103 and storage section 110 etc. so that it can be referenced at all times, and when selecting a channel (channel switching), by referring to the service list and IP related information stored in the non-volatile memory such as the ROM 103 and the storage section 110, This makes it possible to improve the efficiency of operation during channel selection (channel switching). In other words, compared to reacquiring AMT and TLV-NIT when tuning (channel switching), it is possible to shorten the time from the start of tuning (channel switching) to the end of tuning (channel switching). Become.

[Screen layout control of broadcast receiving device]
It is assumed that the broadcast receiving apparatus 100 of this embodiment is capable of controlling the screen layout based on the description of the LCT. FIG. 18 shows an example of the data structure of LCT.

In the figure, in particular, the "left_top_pos_x" and "right_down_pos_x" parameters indicate the horizontal position of the top left and bottom right of the area when the left side of the full screen display is set to ``0'' and the right side is set to ``100''. Each is expressed as a percentage of the total number of pixels in the horizontal direction. The "left_top_pos_y" and "right_down_pos_y" parameters specify the vertical position of the upper left and lower right of the area, respectively, when the upper side of the full screen display is set to ``0'' and the lower side is set to ``100''. It shall be expressed as a percentage of the total number of pixels. Furthermore, the "layer_order" parameter indicates the relative position of the region in the depth direction.

Examples of assignment of layouts to layout numbers based on the settings of each of the parameters are shown in FIGS. 19A to 19D together with the setting values of each of the parameters.

FIG. 19A shows the default layout settings of the broadcast receiving apparatus 100 of this embodiment, and is an example in which only one area is set 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, if the number of pixels of the entire screen is 7680 pixels horizontally/4320 pixels vertically, in "area 0", the "left_top_pos_x" parameter is "0", the "left_top_pos_y" parameter is "0", and the "right_down_pos_x" parameter is "80". ” and the “right_down_pos_y” parameter is “80”, so it is set in the range of (0,0)-(6143,3455). Similarly, "area 1" is set to the range of (6144,0)-(7679,4319), and "area 2" is set to the range of (0,3456)-(6143,4319).

FIG. 19C is an example in which three areas are set like in FIG. 2'' has the same range as described above, and is placed in front of the ``area 0'' according to the setting of the ``layer_order'' parameter. In FIG. 19D, "area 0" is set to device 0 (default device: broadcast receiving device 100 in this embodiment), and "area 1" is set to device 1 (in this embodiment, mobile information terminal 700). This is an example of a case where

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

Incidentally, the fractions below the decimal point that occur when dividing the screen according to the setting values of parameters such as "left_top_pos_x" may be rounded up or down. Rounding (or rounding to the nearest whole number in binary numbers) may be used. For example, if the number of pixels of the whole screen is 7680 pixels/4320 pixels vertically, 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 the "right_down_pos_y" parameter is "0". ” parameter is “51”, you can set “area 0” in the range (0,0)-(3916,2203) by rounding up, or set it in the range (0,0)-(3915,2203) by rounding down. 2202) may be set as "area 0". Furthermore, in consideration of macroblocks during video compression processing, rounding up/down processing may be performed in units of 8 pixels, units of 16 pixels, or the like. The above processing makes it possible to efficiently perform area setting based on LCT and resolution conversion processing of multimedia content in the area.

[Exception handling for screen layout control of broadcast receiving device]
In the broadcast receiving apparatus 100 of this embodiment, even if the screen layout area is controlled by the LCT described above, when the user instructs to display the EPG screen, as an exception process, It is assumed that it is possible to perform screen layout control ignoring the description content of the LCT. FIG. 20A shows an example of the operation of exception handling for screen layout control based on LCT.

The screen layout control similar to that shown in FIG. 19B is performed by the LCT description, and the broadcast program video is displayed in "area 0", and the broadcast of program cooperation data etc. linked to the broadcast program is displayed in "area 1" and "area 2". When the user instructs the display of the EPG screen using a remote control (not shown) while content is being displayed, the broadcast receiving apparatus 100 of this embodiment uses the LCT description as shown in FIG. 20A(A). Regardless of the content, the screen layout settings are returned to the default settings (that is, the screen layout control similar to that in FIG. 19A is performed), and the EPG screen is controlled to be displayed on the entire screen. Further, when the user instructs to end the display of the EPG screen, screen layout control is re-executed in accordance with the contents described in the LCT.

By performing the above-described 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 visibility.

Note that the screen layout control exception processing is not only applied when displaying an EPG screen, but also applies to various setting screens (in the illustrated example, the recording setting screen) of the broadcast receiving device 100, as shown in FIG. 20B. ) may be applied when displaying a sub-screen or when displaying two screens.

In the case of the recording setting screen shown in FIG. 5A, the display area for broadcast content is changed from the entire screen to only the small screen portion at the bottom right of the screen. Similarly, in the case of the two-screen display shown in FIG. 6B, 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 of the screen. In either case, the display area for displaying the broadcast content is narrower than when using the entire screen, so it is possible to maintain area control of the screen layout within the display area (i.e., do not divide the area). It is not desirable for visual recognition to display multiple broadcast contents at the same time. Therefore, in the broadcast receiving apparatus 100 of the present embodiment, in the above situation, only the broadcast content of "area 0" is selected and displayed in the display area. Note that broadcast content in "area 1" or "area 2" may be selected and displayed depending on the previous area selection status.

By performing the above-described control, it is possible to improve the ease of viewing the broadcast content, compared to the case where various broadcast contents are displayed while maintaining the area control of the screen layout. The same applies when displaying a small screen on a recorded program list screen, when displaying Internet content in a browser, etc.

[EPG display of broadcast receiving device]
In the broadcasting system of this embodiment, it is assumed that time-series information regarding events (so-called programs) included in each service constituting the broadcasting network is transmitted using the MH-EIT. FIG. 21 shows an example of the data structure of the MH-EIT of this embodiment. MH-EITs are identified into two classes by table IDs (corresponding to the "talbe_id" parameter in the figure), and indicate information about the current/next event of the own TLV stream and schedule information of each event of the own TLV stream. shall be possible. The broadcast receiving apparatus 100 of this embodiment refers to the MH-EIT, etc., and performs identification using the service ID (corresponding to the "service_id" parameter in the figure), thereby obtaining information such as the start time and broadcast time of each event. It is assumed that the EPG screen can be created by acquiring the EPG, and that the created EPG can be superimposed on video information etc. by the video synthesis section 161 and displayed on the monitor section 162.

FIG. 22A is a diagram showing an example of an EPG screen in broadcast receiving apparatus 100 of this embodiment. The EPG screen 162a has a matrix shape with the vertical axis representing time and the horizontal axis representing service IDs (channels), and displays detailed information on broadcast programs broadcast on each channel in each time period. Further, the detailed information 162a1 of each broadcast program is mainly composed of a title area 162a2 and a detailed explanation area 162a3.

The title area 162a2 displays the program title of the broadcast program and symbols representing attributes of the broadcast program. The symbols and the like representing attributes of the broadcast program include, 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 symbolizing "data", which means that the service is compatible with data broadcasting by a broadcasting service. Alternatively, it may be a mark 162a4 symbolizing "NetWork", which means that content, applications, etc. related to the broadcast program can be obtained from the network. Further, the symbol or the like representing the attribute of the broadcast program may be replaced 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.

Note that there is a case where each control information (message, table, descriptor, etc.) in the broadcasting system of this embodiment indicates that content, applications, etc. related to the broadcast program can be obtained from the network. However, if the LAN cable is not connected to the LAN communication unit 121 of the broadcast receiving device 100, and access to each server device on the network is not possible, the mark 162a4 symbolizing the “NetWork” is displayed. etc. may be controlled so as not to be displayed.

Further, in the case where the broadcast program is a distribution program distributed via the Internet 200 and cannot be acquired only from broadcast waves, furthermore, as described above, the broadcast receiving device 100 is a distribution program distributed by each server device on the network. If the EPG screen 162b cannot be accessed, the detailed information 162b1 displayed on the EPG screen 162b may be controlled to be grayed out, as shown in FIG. 22B. That is, control is performed so that detailed information about distribution programs that cannot be viewed is not displayed. Further, by differentiating the background color of the detailed information 162b1 from others, this may be used as an alternative to the gray-out processing. When detailed information 162b1 is selected by operating a remote controller (not shown), a message indicating that the broadcast receiving device 100 is unable to access each server device on the network, or a message indicating that the broadcast program associated with detailed information 162b1 is to be viewed is displayed. The user may be notified that this is not possible through a pop-up or the like.

Through each of the above-described controls, the broadcast receiving apparatus 100 can provide program information for each broadcast program in a format that is more natural to the user, depending on the network connection status.

FIG. 22C is a diagram showing another example of the EPG screen in the broadcast receiving apparatus 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. In particular, "M2 Broadcast" station is It is assumed that a broadcast program to be distributed and a distribution program to be distributed via the Internet 200 (information 162c1 in the frame indicated by "Net Broadcast" in the figure) are provided at the same time.

As shown in the figure, if there is a channel that only has distribution programs distributed via the Internet 200, normally all channels (including information 162c1) are control the display of information. On the other hand, when the broadcast receiving apparatus 100 is unable to access each server apparatus on the network, as shown in the EPG screen 162d in FIG. The information on the channel "M2 Broadcast (Net Broadcasting)" (information 162c1 in FIG. 3(A)) may be controlled not to be displayed.

Each of the above-described controls makes it possible for the user of the broadcast receiving apparatus 100 to eliminate the need to check information on channels that the user cannot view.

[Emergency warning broadcast display on broadcast receiving device]
The broadcast receiving device 100 of this embodiment performs the 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 application, or may be provided as text information in superimposed text. When the emergency warning broadcast is provided as text information in superimposed text, it is preferable to display the text information in the superimposed text 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 a user watches a normal broadcast program and receives an emergency warning broadcast while the program screen 162e of the broadcast program is displayed on the monitor unit 162, the user receives an emergency warning broadcast while viewing a normal broadcast program. The text information 162e1 is displayed superimposed on the program screen 162e. Similarly, when the user instructs the display of the EPG screen and receives an emergency warning broadcast while the EPG screen 162f is displayed on the monitor unit 162, the text information 162f1 from the emergency warning broadcast is superimposed on the EPG screen 162f. control so that it is displayed.

Due to the above-described control, in the broadcast receiving apparatus 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 not displayed. When receiving the emergency warning broadcast, it is possible to avoid missing important text information based on the emergency warning broadcast. Note that this control may be performed on normal text information with superimposed text that is not based on emergency warning broadcasts.

[Various exception handling]
The broadcast receiving apparatus 100 of this embodiment may perform exception processing as described below, for example, when data outside the TLV stream within the same package cannot be acquired.

As explained with reference to FIG. 6E, in the broadcasting system supported by the broadcast receiving apparatus 100 of this embodiment, based on the location information (corresponding to "MMT_general_location_info()" in FIG. 17) stored in the MPT, Data to be acquired and data to be acquired through a route other than the TLV stream can be included in the same package. However, the data transmission path other than the TLV stream (eg, IPv4 data flow, IPv6 data flow, MPEG2-TS for broadcasting, etc.) pointed to by the location information is a reception function different from the reception function of the TLV/MMT stream. Therefore, even if the broadcast receiving device 100 is in operation, there may be situations in which the receiving functions of these transmission paths are not operating, situations in which the receiving function itself is operating but relay devices etc. are not operating, or situations in which these transmission paths are not operating. There may be situations in which data cannot be acquired from these transmission paths, such as situations where the transmission paths are not connected by wire or wirelessly, or situations where the broadcast receiving device 100 is installed in an environment where these transmission paths cannot be connected in the first place. .

Under these circumstances, the location information stored in the MPT will generate an event that indicates that data acquired within the TLV stream and data acquired through a route other than the TLV stream are associated so as to be included in the same package. When received, the broadcast receiving apparatus 100 of this embodiment may perform the following operations, for example.

For example, LCT has set multiple areas on the screen as shown in FIGS. 19B and 19C, and displays the video included in the TLV stream in ``area 0'', and ” is associated so that data acquired through a transmission route other than the TLV stream is displayed, and the data from the transmission route other than the TLV stream that should be displayed in “Area 1” or “Area 2” is If it cannot be obtained, layout display of multiple areas designated by the LCT may be prohibited. Specifically, even if the LCT is received, the video of the content received in the TLV stream remains displayed in "area 0" of the default layout display shown in FIG. 19A, and the video of the content received in the TLV stream is displayed as shown in FIG. 19B and FIG. What is necessary is to prevent the display from displaying a layout of multiple areas. Furthermore, even if an instruction to change the default layout to the layout indicated by the LCT is input to the operation input section 170 in FIG. 7A in this state, the default layout shown in FIG. 19A may remain displayed, or other data broadcasting screens may be displayed. 19B or 19C so as not to shift to a layout display of multiple areas as shown in FIGS. 19B and 19C.

LCT has set multiple areas on the screen, as shown in Figures 19B and 19C, and displays the video included in the TLV stream in 'area 0', and displays the video included in the TLV stream in 'area 1' and 'area 2'. When data acquired through a transmission route other than the TLV stream is mapped to be displayed, the data from the transmission route other than the TLV stream that should be displayed in "Area 1" or "Area 2" cannot be acquired. Another example of operation in this case is to first display the display frame of multiple areas shown by the LCT in FIGS. However, if data on a transmission path other than the TLV stream indicated by the MPT location information cannot be acquired even after a predetermined period of time has elapsed, the display may be switched back to the default layout display state shown in FIG. 19A. In this case, if the program video included in the TLV stream continues to be displayed in "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.

In addition, since the data of the transmission path other than the TLV stream to be displayed in "Area 1" or "Area 2" cannot be acquired, the relevant content received in the TLV stream is displayed in "Area 0" of the default layout display shown in FIG. 19A. When the video is displayed, the various communication functions and various reception functions of the broadcast receiving apparatus 100 of this embodiment start, and the communication environment, communication status, and various reception functions of the various communication functions are changed. Due to a change in the reception environment or reception situation, a situation may arise in which data on a transmission path other than the TLV stream to be displayed in "area 1" or "area 2" can be obtained. In this case, the broadcast receiving apparatus 100 of the present embodiment immediately switches from the default layout display shown in FIG. 19A to the multiple area layout shown in FIGS. The video of the content received within the stream may be displayed, and the display may be switched to display data acquired from a transmission path other than the TLV stream in "area 1" or "area 2." Alternatively, the layout change may not be performed immediately, but after an instruction to change from the default layout to the layout indicated by the LCT is input from the operation input unit 170.

[Copyright protection function]
In the digital broadcasting system supported by the broadcast receiving apparatus 100 of the present embodiment, by transmitting MPT including copy control information, for example, the copy control information allows "unlimited copying"("unlimited copying and storage"). It may be divided into two types: ``unlimited copying and encryption processing required during storage and output''), ``only one generation allowed to be copied'', and ``copyable a predetermined number of times'' ( For example, it may be configured to indicate and transmit the copy control status of the content referenced by the MPT, such as "dubbing 10" (if copying is allowed nine times and moving once is allowed) or "copying prohibited". In this case, the broadcast receiving apparatus 100 of this embodiment stores the content in the storage unit 110, records it on a removable recording medium, outputs it to an external device, and outputs it to an external device according to the copy control information. It may be configured to control copying, moving processing to an external device, and the like. Note that the storage processing target is not limited to the storage unit 110 inside the broadcast receiving device 100, but may also include records that have been subjected to protection processing such as encryption processing so that they can be played only by the broadcast receiving device 100. . Specifically, the targets of the storage process include external recording devices 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 "unrestricted copying", the broadcast receiving apparatus 100 of this embodiment can store information in the storage section 110, record it on a removable recording medium, and record it on an external device. You can output to, copy to, and move to external devices without any restrictions. However, if ``unlimited copying possible and encryption processing required for storage and output'' is different from ``unlimited copying possible and encryption processing not required for storage and output'', then ``unlimited copying possible and encryption processing required for storage and output'' is different. When "encryption processing is required", storage in the storage unit 110, recording on a removable recording medium, output to an external device, copying to an external device, and moving to an external device are limited to the number of times. However, it is necessary to perform encryption processing in both cases.

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

Furthermore, when the copy control information included in the MPT indicates that "copying is possible for a predetermined number of times," the broadcast receiving apparatus 100 of this embodiment can encrypt and store the data in the storage (accumulation) section 110. When the stored content is output to an external device for viewing, it is encrypted and output together with copy control information of "copy prohibited". However, it may be possible to enable a predetermined number of copies and moves to an external device. In the case of the so-called "dubbing 10" regulation, nine copies and one move may be performed to the external device.

Furthermore, when the copy control information included in the MPT indicates "copy prohibited", the broadcast receiving apparatus 100 of the present embodiment prohibits copying to the storage unit 110. However, the broadcast receiving apparatus 100 uses the storage unit 110 only for a predetermined time or a predetermined time specified by control information included in the broadcast signal (for example, according to the MH-Expire descriptor shown in FIG. 6D). When configured to have a "temporary storage" mode that allows data to be stored in the storage section 110, even if the copy control information included in the MPT indicates "copy prohibited" Enables temporary retention of the content. When the content whose copy control information included in the MPT is "copy prohibited" is output for viewing on an external device, it is encrypted and output together with the copy control information "copy prohibited".

Note that output for viewing to the aforementioned external device may be performed via the video output unit 163 and audio output unit 166 in FIG. 7A, the digital I/F unit 125, the LAN communication unit 121, or the like. The copying or moving process to the external device described above may be performed via the digital I/F section 125, the LAN communication section 121, etc. in FIG. 7A.

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

In addition, copy processing to an external device via the LAN communication unit 121 of content whose copy control information indicates copy restrictions such as "only one generation can be copied", "copying is possible a predetermined number of times", and "copying prohibited" is performed. 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 within the same subnet as the IP address of the broadcast receiving device 100, and the IP address of the external device is If it is outside the same subnet as IP address 100, it may be prohibited. Contents whose copy control information is ``unrestricted copying and encryption processing required during storage and output'' may be handled in the same way.

Similarly, content whose copy control information indicates copy restrictions such as ``only one generation can be copied'', ``a predetermined number of copies can be made'', and ``unlimited copies can be made and encryption processing is required when storing and outputting'', etc. Regarding the process of storing data in the storage (accumulation) unit 110 and then moving it to an external device via the LAN communication unit 121, if the IP address of the external device that is the destination of the packet sent from the broadcast receiving device 100 is If the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving device 100, it may be prohibited.

As a general rule, the IP address of the external device that is the destination of the transmission packet from the broadcast receiving apparatus 100 is the one that receives the broadcast. This is possible only when the IP address of the device 100 is within the same subnet, and 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, if the external device is connected within the same subnet as the IP address of the broadcast receiving device 100 within a predetermined period, and the external device is registered as a device that 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 (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 broadcast receiving device 100 in the external device The configuration may be such that the content stored in the unit 110 can be outputted as video and audio for viewing. In this case, the video output and audio output for viewing are performed after encrypting the content.

According to the processing described above, 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, it is possible to achieve both user convenience and content protection. can be realized.

Next, as described with reference to FIG. 6E, in the digital broadcasting system supported by the broadcast receiving apparatus 100 of this embodiment, location information in the MPT ("MMT_general_location_info()" in FIG. 17) is used to determine whether the TLV stream in the broadcast route is Data acquired through a different route (IPv4, IPv6, MPEG2-TS, URL, etc.) may also be included in the same package and event as the data acquired in the TLV stream, but in this case, the data must be copied to MPT. Content protection when control information is included will be explained.

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 routed differently from the data acquired in the TLV stream of the broadcast route (IPv4, IPv6, MPEG2-TS, URL, etc.). ) may be controlled according to copy control information included in the TLV stream. As mentioned above, the copy control status of the content specified by these copy control information includes ``unlimited copying'' (``unlimited copying possible and encryption required for storage and output'') and ``unlimited copying possible''. It may be divided into two types: ``and encryption processing is not required when storing and outputting''), ``only one generation can be copied'', and ``copying is possible for a predetermined number of times'' (for example, if 9 times of copying + 1 move is allowed, so-called ``copying is possible''). ``dubbing 10''), ``copying prohibited'', etc. can be specified.

Here, if the position of the data indicated by the location information includes MPEG2-TS data transmitted by another digital broadcasting signal, the MPEG2-TS data will be associated with the copy control information even in the other digital broadcasting signal. It is being broadcasted. Then, the question becomes how to control the copying of data in the MPEG2-TS based on what information (whether to follow the copy control information included in the TLV/MMT stream or to follow the copy control information included in the MPEG2-TS). .

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

<Operation example 1>
In the first operation example, when copy control information is included in the MPT and data included in the same package and the same event in the location information includes MPEG2-TS data transmitted by another digital broadcast signal, The copy control state indicated by the copy control information included in the TLV stream is given priority 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 "1 generation copy allowed", and the copy control state indicated by the copy control information included in the MPEG2-TS is "copy allowed multiple times". If so, copy control may be performed on the data as "1 generation copyable" content even if the data is obtained through a different route (digital broadcasting in MPEG2-TS transmission format) than the data obtained in the TLV stream. For example, the copy control state indicated by the copy control information included in the TLV stream is "unlimited copying allowed", and the copy control state indicated by the copy control information included in the MPEG2-TS is "copying allowed a predetermined number of times". If so, copy control may be performed on the data as "unrestricted copyable" content even if the data is obtained through a different route (digital broadcasting in MPEG2-TS transmission format) than the data obtained in the TLV stream.

In the case of this operation, data acquired through a route other than the TLV stream can also be brought into a copy state that the broadcast receiving apparatus 100 of this embodiment wants to manage in the corresponding broadcast system.

<Operation example 2>
In the second operation example, when the MPT includes copy control information and the location information includes MPEG2-TS data transmitted in another digital broadcast signal in data included in the same package and the same event, the TLV stream The copy control state indicated by the copy control information included in the MPEG2-TS is compared with the copy control state indicated by the copy control information included in the MPEG2-TS, and the copy control state indicated by the copy control information included in the MPEG2-TS is determined. If the copy control state is stricter than the copy control state indicated by the copy control information included in the TLV stream, storage processing in the storage unit 110 or the like, recording processing on a removable recording medium, or output processing from a digital interface is performed. At this time, the MPEG2-TS data is excluded from the content to be processed.

In the case of this operation, data acquired through a route other than the TLV stream is copied on the broadcast receiving apparatus 100 of this embodiment while respecting the original copy control information set in the broadcasting system that transmits the data. Duplication of control states can be eliminated.

Also, as a result of the comparison, if 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 if the copy control state is less strict than the copy control state indicated by the copy control information included in the TLV stream. In this case, the MPEG2-TS data included in the same package and the same event with the location information may be subjected to copy control as content in the copy control state indicated by the copy control information included in the TLV stream.

In the case of this operation, data acquired through a route other than the TLV stream is copied on the broadcast receiving apparatus 100 of this embodiment while respecting the original copy control information set in the broadcasting system that transmits the data. Duplication of control states can be eliminated.

In the above description, the copyright protection function of the broadcast receiving apparatus 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 copy control information is arranged is not limited to MPT. In addition to MPT, information is transmitted by placing it in the MH-Service Description Table (MH-SDT), MH-Event Information Table (MH-EIT), or other tables explained in FIG. 6B, and the broadcast receiving device 100 follows these. Copyright protection processing may also be performed.

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

Example 2 of the present invention will be described below. Note that the configuration, processing, effects, etc. in this example are the same as in Example 1 unless otherwise specified. Therefore, in the following, the differences between this embodiment and the first embodiment will be mainly explained, and the explanation of the common points will be omitted as much as possible to avoid duplication. Further, the following description will be made assuming that the broadcast receiving apparatus of this embodiment is a television receiver that supports both the MMT system and the MPEG2-TS system as media transport systems.

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

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

The first tuner/demodulator 831 receives broadcast waves of a broadcast service that employs MMT as a media transport method via an antenna (not shown), and selects a service desired by the user based on the control of the main controller 801. Tune in (select) to the channel. Further, the first tuner/demodulator 831 demodulates the received broadcast signal to obtain an MMT data string, and outputs it to the MMT decode processor 841 . The second tuner/demodulator 832 receives broadcast waves of a broadcasting service that adopts MPEG2-TS as a media transport method via an antenna (not shown), and receives the broadcast waves as desired by the user based on the control of the main controller 801. Tune in (select) to the channel of the service you want to use. Further, the second tuner/demodulator 832 demodulates the received broadcast signal to obtain an MPEG2-TS data string, and outputs it to the MPEG2-TS decode processor 842.

The MMT decoding processing section 841 inputs the MMT data string output from the first tuner/demodulation section 831, and based on the control signal included in the MMT data string, real-time presentation elements such as a video data string, an audio data string, Performs separation processing of character superimposition data strings, subtitle data strings, etc., decoding processing, etc. The MMT decoding processing unit 841 includes the separation unit 132, video decoder 141, video gamut conversion unit 142, audio decoder 143, text super decoder 144, subtitle decoder 145, subtitle synthesis unit 146, It is assumed that functions corresponding to the subtitle color gamut conversion section 147, data decoder 151, cache section 152, application control section 153, browser section 154, application color gamut conversion section 155, sound source section 156, etc. are provided. The MMT decoding processing unit 841 is capable of performing the various processes described in the first embodiment. Note that the details of the various processes described above are as explained in the first embodiment, so the explanation will be omitted.

The MPEG2-TS decoding processing section 842 inputs the MPEG2-TS data string output from the second tuner/demodulation section 832, and converts the video data, which is a real-time presentation element, based on the control signal included in the MPEG2-TS data string. This section performs separation processing, decoding processing, etc. of strings, audio data strings, character superimposition data strings, subtitle data strings, etc. The MPEG2-TS decoding processing unit 842 has the same function as the IRD (Integrated Receiver Decoder) unit of a conventional television receiver that receives broadcast waves of a broadcasting service that uses MPEG2-TS as a media transport method. Detailed explanation will be omitted.

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

The LAN communication unit 821 is connected to the Internet 200 via the router device 200r, and transmits and receives data to and from each server device and other communication devices on the Internet 200. Additionally, the MMT data string (or a part thereof) and the MPEG2-TS data string (or a part thereof) of the program transmitted via the communication line are acquired, and the MMT decoding processing unit 841 and the MPEG2-TS data string are used as appropriate. It is output to the decoding processing section 842.

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

Generally, when the video synthesis section 861 mainly selects the video information etc. output from the MMT decoding processing section 841, information regarding the current date and current time acquired from the MH-TOT is When the video information etc. are superimposed on the video information etc. and the video synthesis section 861 mainly selects the video information etc. output from the MPEG2-TS decoding processing section 842, the information regarding the current date and current time acquired from the TOT is superimposed on the above. What is necessary is just to control it so that it is superimposed on video information or the like.

However, because there are differences in encoding/decoding processing, transmission routes, etc. between broadcasting services that use MMT as the media transport method and broadcasting services that use MPEG2-TS as the media transport method, there are differences in the current time display. In this case, an inconsistency may occur when selecting a broadcasting service that uses MMT as a media transport method and when selecting a broadcasting service that uses MPEG2-TS as a media transport method. For example, as shown in FIG. 25, from an EPG screen 162g that displays channel information of a broadcasting service that uses MMT as a media transport method, to an EPG that displays channel information of a broadcasting service that uses MPEG2-TS as a media transport method. When the screen display is switched to the screen 162h, there is a possibility that the user may feel a sense of visual discomfort due to the inconsistency caused by the current time display being switched from the current time display 162g1 to the current time display 162h1.

In the broadcast receiving apparatus 800 of this embodiment, in order to prevent the user from feeling visually uncomfortable, even when the video synthesis section 861 mainly selects the video information etc. output from the MMT decoding processing section 841, , controls to superimpose information on the current date and time acquired from the TOT onto the video information, etc. That is, control is performed so that current time information provided by a broadcasting service that uses MPEG2-TS as a media transport method is superimposed on the content of a broadcast service that uses MMT as a media transport method.

By performing the above control, the broadcast receiving apparatus 800 of this embodiment always displays the current time information obtained 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, users may experience visual discomfort due to inconsistencies in the current time display. It is possible to prevent this from happening.

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 apparatus 800 of this embodiment. The broadcast receiving apparatus 800 of this embodiment always refers to the TOT to obtain current time information when it is possible to receive a broadcast service that uses MPEG2-TS as the media transport method. , the MH-TOT is not available for reception of broadcasting services that use MPEG2-TS as the media transport method, and is available for reception of broadcasting services that use MMT as the media transport method. control to refer to and obtain current time information.

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

As mentioned above, when controlling the content of a broadcasting service that uses MMT as a media transport method to superimpose the current time information provided by a broadcasting service that uses MPEG2-TS as a media transport method, In either case, the current time information provided by a broadcasting service that uses MMT as a media transport method is superimposed on the content of a broadcasting service that uses MPEG2-TS as a media transport method. Similarly to the explanation in [Time management of broadcast receiving device] of Embodiment 1, the current time information can be corrected by referring to the "delta" parameter of the time information in the TMCC extended information area. It is possible.

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

However, the broadcast receiving apparatus 800 of the present embodiment may also be used when displaying video information etc. provided by a broadcasting service that employs MMT as a media transport method, or when displaying video information etc. provided by a broadcast service that employs MMT as a media transport method. Both the MH-EIT and the EIT can be obtained even when displaying video information etc. provided by a broadcasting service that employs the MH-EIT, improving usability for the user.

FIG. 27A shows an example of an EPG screen in broadcast receiving apparatus 800 of this embodiment. In the figure, the EPG screen 162i is an EPG screen created based on MH-EIT, a broadcasting service that uses MMT as the media transport method, and includes "M1 TV," "M2 Broadcast," "M3 Channel," and "M4TV." ”, “TV M5”, etc. are the names of broadcasting stations of broadcasting services that employ MMT as the media transport method. Further, 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 includes "T6 TV", "T7 Broadcast", "T8 Channel", and "T9TV". , "TV TA", etc. are the names of broadcasting stations of broadcasting services that employ MPEG2-TS as the media transport method.

For example, if a user operates a remote control (not shown) to instruct display of the EPG screen while viewing a broadcast program provided by a broadcasting service that uses MMT as the media transport method, the initial screen of the EPG screen (not shown) (omitted) is displayed. The initial screen of the EPG screen is an EPG screen created based on MH-EIT, a broadcasting service that uses MMT as the media transport method, and is an EPG screen created based on MH-EIT, a broadcasting service that uses MMT as a media transport method. (near the current time)" detailed information on the broadcast programs of each channel is displayed. Next, the user wishes to check the detailed information of the broadcast program of each channel "from 20:00" on "October 9, 2014", and instructs to update the EPG screen by operating the remote control (not shown). Then, the EPG screen 162i is displayed.

Furthermore, if the user wishes to check detailed information on broadcast programs provided by a broadcasting service that uses MPEG2-TS as the media transport method, and instructs to switch networks by operating a remote controller (not shown), the EPG A screen 162j is displayed. At this time, in the broadcast receiving apparatus 800 of this embodiment, the initial screen of the EPG screen created based on the EIT of the broadcasting service that adopts MPEG2-TS as the media transport method (i.e., "October 7, 2014 (Detailed information on broadcast programs of each channel from 17:00 on ``17:00~''), but on the same day and at the same time as the EPG screen 162i that was displayed immediately before (i.e., ``8:00~ on October 9, 2014'') ”) to display detailed information on broadcast programs for each channel.

The above-mentioned control allows the user to continuously confirm detailed information regarding broadcast programs on the same day and at the same time on a plurality of networks using different media transport methods with a simple operation. That is, the usability of broadcast receiving apparatus 800 is improved.

FIG. 27B is a diagram showing an example of an EPG screen in the broadcast receiving apparatus 800 of this embodiment, which is different from the above. 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, by scrolling the EPG screen in the channel direction (horizontal direction), channel information and media created based on MH-EIT of a broadcasting service that uses MMT as the media transport method can be displayed. Channel information created based on the EIT of a broadcasting service that uses MPEG2-TS as the transport method is seamlessly displayed on the same time axis.

Therefore, while the user is checking the channel information created based on the MH-EIT of the broadcasting service that has adopted MMT as the media transport method, the EIT of the broadcasting service that has adopted MPEG2-TS as the media transport method is Even when the user desires to check the channel information that has been sent, it is possible to eliminate the need for instructions to switch networks by operating a remote controller (not shown). Furthermore, the user can simultaneously confirm detailed information regarding broadcast programs of multiple networks using different media transport methods on the same day and at the same time. That is, the usability of broadcast receiving apparatus 800 is improved.

Although examples of embodiments of the present invention have been described above using Examples 1 and 2, the configuration for realizing the technology of the present invention is not limited to the above-mentioned examples, and various modifications 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 scope of the present invention. Further, the numerical values, messages, etc. that appear in the text and figures are merely examples, and the effects of the present invention will not be impaired even if different values are used.

Some or all of the functions of the present invention described above may be realized in hardware by, for example, designing an integrated circuit. Alternatively, the functions may be realized by software by having a microprocessor unit or the like interpret and execute operating programs for realizing the respective functions. Hardware and software may be used together.

Note that the software for controlling the broadcast receiving apparatus 100 may be stored in advance in the ROM 103 and/or the storage unit 110 of the broadcast receiving apparatus 100 at the time of product shipment. It may also be acquired from another application server 500 or the like on the Internet 200 via the LAN communication unit 121 after the product is shipped. 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.

Further, the control lines and information lines shown in the figures are those considered necessary for explanation, and do not necessarily show all control lines and information lines on the product. In reality, almost all components can be considered to be interconnected.

100,800...Broadcast receiving device, 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 section, 124, 824... Extension interface section, 125, 825... Digital interface section, 131, 831, 832... Tuner/demodulation section, 132... Separation section, 141... Video decoder, 142... Video color gamut conversion section, 143 ...Audio decoder, 144...Text super decoder, 145...Subtitle decoder, 146...Subtitle synthesis section, 147...Subtitle color gamut conversion section, 151...Data decoder, 152...Cache section, 153...Application control section, 154...Browser section, 155...Application color gamut conversion section, 156...Sound source section, 161,861...Video synthesis section, 162,862...Monitor section, 163,863...Video output section, 164,864...Audio synthesis section, 165,865...Speaker section , 166,866...Audio output section, 170,870...Operation input section, 841...MMT decoding processing section, 842...MPEG2-TS decoding processing section, 200...Internet, 200r...Router device, 200a...Access point, 300t...Radio wave Tower, 300s...Broadcasting satellite (or communication satellite), 300...Broadcast station server, 400...Service provider server, 500...Other application servers, 600...Mobile telephone communication server, 600b...Base station, 700...Mobile information terminal .

Claims (1)

A copy control method in a broadcast receiving device that receives content of a broadcast program, the method comprising:
a program guide generation step for generating a program guide;
a reservation step for reserving recording of a broadcast program;
a receiving step of receiving a plurality of types of table information and content of the broadcast program via a broadcast transmission path or a communication transmission path;
a copy control step of controlling the storage of the content of the received broadcast program and copying the output for viewing from the broadcast receiving device to an external device via a LAN;
Equipped with
In the copy control step, among the plurality of types of table information, a route for acquiring the content of the broadcast program can be identified from route candidates including IP data flows according to copy control information stored in the MPT that includes location information. It controls the storage of the content of the broadcast program and the output for viewing to an external device via the LAN, and copy control is also performed based on the copy control information of the control information transmitted by MPEG2 for the content of the same broadcast program. is specified, the output control is performed based on the copy control information stored in the MPT rather than the copy control information of the control information transmitted by the MPEG2,
The viewing output to the external device via the LAN is the viewing output to the external device via Ethernet hardware.
A method for controlling copying of broadcast program content.

Images