KR20110087812A - Digital broadcast receiver and method for managing a content - Google Patents

Abstract

PURPOSE: A content management method of a digital broadcasting receiver is provided to prevent content information from being displayed on a GUI. CONSTITUTION: A control unit requests the input of a password about contents which selected information directs(S1820, S1830). In case the password is inputted, the control unit sets up a password to the content which the selected information directs(S1840, S1850). The control unit prevents content information from being displayed on a GUI(Graphic User Interface)(S1860).

Description

Digital broadcast receiver and method for managing a content}

The present invention relates to a digital broadcast receiver and a content management method, and more particularly, to a method for managing content in a digital broadcast receiver.

The broadcasting receiver transmits content produced by a broadcaster through a radio wave transmission medium such as terrestrial, cable, or satellite broadcasting, and the user is serviced by viewing through a receiver capable of receiving the respective delivery media.

However, as digital-based digital broadcasting technology has been developed and commercialized in existing analog broadcasting, real-time broadcasting, contents on demand, games, and news using Internet networks connected to homes in addition to existing radio waves or wired cable media. It is now possible to provide a variety of content services to the user.

An example of providing a content service using the Internet network is IPTV (Internet Protocol TV). The IPTV transmits various information services, video contents, and broadcasts through an internet network and provides them to the receiver of the user. The Internet network may be implemented on various types of networks such as an optical cable network, a coaxial cable network, a fiber to the home (FTTH), a telephone network, and a wireless network based on an Internet Protocol (IP).

In the case of the service using the Internet network as described above, unlike general terrestrial broadcasting, the interactivity may be added, and the user may watch a content service that he / she wants to see at a convenient time.

As various broadcasting services are provided, the information is displayed on a TV screen when providing information on the broadcasting service to a user of the broadcasting receiver, or when setting or changing the setting and request for the broadcasting service, display setting, audio setting, or the like. It uses a method using on-screen display (OSD).

An object of the present invention is to provide a digital broadcast receiver and a content management method for safely managing broadcast content and protecting user privacy.

Another object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for executing a content management method on a computer.

In order to achieve the above technical problem, the content management method according to the present invention, in the method of managing content in a digital broadcast receiver, displays a graphical user interface for providing a content list including information on at least one content Receiving a hidden view command for requesting to release a hidden function for the content in which the hidden function is set; checking whether there is a password-set content among the contents in which the hidden function is set; In this case, the method may include requesting input of a password, receiving a password, and displaying information on content in which the input password is set in the graphic user interface.

Preferably, the content management method includes receiving a hidden setting command for selecting at least one content from a list of contents displayed on the graphical user interface and requesting a setting for a hiding function, and inputting a password for the selected content. Requesting a password, receiving a password, setting the input password to the selected content, and hiding information about the set content in the graphical user interface.

Preferably, the content management method may further have a step of displaying information on content in which a password is not set among contents in which a hidden function is set.

Preferably, the password may be set differently for each content.

Preferably, the content may be stored content.

Preferably, the content management method may further include receiving a content playback command for requesting playback of the displayed content, and receiving the requested content from a server and displaying the received content. have.

According to another aspect of the present invention, there is provided a digital broadcasting receiver according to the present invention. A display unit for displaying a graphic user interface for providing a content list including information on at least one content. An interface unit for receiving a hidden view command requesting the function release, and checking whether there is a password-set content among the contents in which the hidden function is set, and if there is a content in which the password is set, requesting input of a password; Is controlled to be displayed, and if a password is input, the controller controls to display the information on the content in which the input password is set in the graphic user interface.

Preferably, the interface unit receives a hidden setting command for selecting at least one content from a list of contents displayed in the graphic user interface and requesting setting of a hiding function, and the controller is configured to input a password for the selected content. When a request is made and a password is input, the input password may be set to the selected content, and the information about the set content may be controlled to be hidden in the graphic user interface.

Preferably, the control unit may control to further display information on content for which a password is not set, among contents in which a hiding function is set.

Preferably, the password may be set differently for each content.

Preferably, the content may be stored content.

Preferably, the controller may control to receive the requested content from the server when a content play command requesting the playback of the displayed content is input.

Preferably, the digital broadcast receiver may be a network TV.

According to the digital broadcast receiver and the content management method according to the present invention, the information on the content can be prevented from being displayed, the content can be managed safely and the privacy of the user can be protected.

1 is a diagram schematically showing an IPTV system according to an embodiment of the present invention;
2 is a diagram schematically illustrating a network TV system according to an embodiment of the present invention;
3 is a schematic diagram of a multicast scheme,
4 is a diagram schematically illustrating a unicast scheme;
5 is a diagram illustrating a hierarchical structure for broadcasting a Content Download Service (CDS) of IPTV;
6 is a block diagram showing the configuration of a preferred embodiment of a digital broadcast receiver according to the present invention;
7 is a block diagram showing the configuration of another preferred embodiment of a digital broadcast receiver according to the present invention;
8 is a diagram illustrating a screen displaying a message for logging into a digital broadcast receiver according to the present invention;
FIG. 9 illustrates an embodiment of a screen displaying a graphical user interface for providing a content list. FIG.
FIG. 10 illustrates another embodiment of a screen displaying a graphic user interface for providing a content list. FIG.
FIG. 11 is a diagram illustrating an embodiment of a screen displaying a message requesting input of a password to be set in content; FIG.
FIG. 12 illustrates another embodiment of a screen displaying a graphic user interface for providing a content list. FIG.
FIG. 13 illustrates an embodiment of a screen on which a pop-up menu is displayed; FIG.
14 illustrates another embodiment of a screen displaying a graphic user interface for providing a content list.
FIG. 15 is a diagram illustrating an embodiment of a screen displaying a message asking whether to display content having a password set therein; FIG.
FIG. 16 is a diagram illustrating an embodiment of a screen displaying a message requesting input of a password set for content; FIG.
FIG. 17 illustrates another embodiment of a screen displaying a graphic user interface for providing a content list. FIG.
18 is a flowchart illustrating a process of performing an embodiment of a content management method according to the present invention;
19 is a flowchart illustrating a process of performing another preferred embodiment of a content management method according to the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited.

The terms used in the present invention have been selected as general terms widely used as possible in consideration of the functions in the present invention, but may vary according to the intention or custom of a person skilled in the art or the emergence of a new technology. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, it is intended that the terms used in the present invention should be defined based on the meanings of the terms and the general contents of the present invention rather than the names of the simple terms.

The digital broadcast receiver refers to a broadcast receiver capable of receiving digital broadcast transmitted by digital video and audio signals. Here, unlike conventional analog broadcasting, digital broadcasting refers to a broadcasting technology capable of two-way operation, reproduction, and accumulation because the television signal is compressed and exported in a digital form that encodes and records information signals. Compared to analog broadcasting, such digital broadcasting is more resistant to noise, has a lower data loss, and transmits additional error correction information, which is advantageous for error correction, and provides a high resolution and clear picture. In addition, unlike analog broadcasting, digital broadcasting is an interactive service capable of receiving a broadcasting service from a broadcasting station and providing information to the broadcasting station.

In the present invention, the digital broadcast is used as a concept that includes not only broadcasts transmitted through terrestrial waves, satellites and cables, but also broadcasts transmitted through Internet networks. That is, digital broadcasting is defined as a concept including IP (Internet Protocol) broadcasting.

In addition, in the present invention, the digital broadcast receiver includes a broadcast receiver capable of providing an Internet service to a viewer. The Internet service includes content services such as CoD (Content's on Demand), YouTube service, weather, news, local information and search, entertainment services such as games and karaoke, TV mail, TV SMS (Short Message Service), etc. It means a service that can be provided through the Internet, such as a communication service. Accordingly, in the present invention, the digital broadcast receiver includes a network TV, a web TV and a broadband TV. In addition, the broadcast service may include an internet service as well as a broadcast service provided through terrestrial, satellite, and cable.

There may be various system architectures for transmitting digital broadcasts. For example, an Internet Protocol TV (IPTV) system is a system capable of providing various contents using an Internet network, and may be largely composed of a server, a network, and a client.

The servers of the IPTV are servers that perform various functions such as service discovery and selection server, streaming server, contents guide information server, customer information server, and payment information server. It can be configured as.

Among the servers, the streaming server transmits video data encoded in the stored Moving Picture Experts Group (MPEG) 2, MPEG4, etc. to the user through a network. As a protocol for the transmission, a Real-Time Transport Protocol (RTP), a RTP Control Protocol (RTP), or the like may be used.

In case of using Real-Time Streaming Protocol (RTSP), video stream playback can be controlled to some extent through a function called network trick play such as pause, replay, and stop. . The protocols are one example and other real time transmission protocols may be used depending on the implementation.

The content guide information server is a server that provides information on the various contents provided. The content guide information is information corresponding to electronic program guide (EPG) information and includes various information about content. The content guide information server stores content guide information data, and provides the stored data to the receiver.

The information server related to service discovery and selection among the servers provides the receiver with access information, playback information, and the like, for the servers providing various content services such as broadcasting, contents on demand (COD), and games.

The network system consists of an internet based network and gateways. The Internet-based network may use various types of networks such as an optical cable network, a coaxial cable network, a fiber to the home (FTTH), a telephone network, a wireless network, and the like based on IP. In addition to general data transfer, the gateway may perform multicast group management and quality of service (QoS) management using protocols such as Internet Group Management Protocol (IGMP).

A receiver of an IPTV is a receiver capable of receiving data transmitted through an internet network and providing the same to a user. The receiver includes an IPTV settop, a homenet gateway, an IPTV embedded TV, and the like.

In the case of a hybrid IPTV system, various contents of the Internet may be provided as well as various existing broadcasting contents. That is, the user can provide various broadcasting contents such as terrestrial broadcasting, cable broadcasting, satellite broadcasting, personal broadcasting, various internet video contents, data contents other than video, and the like. The contents may be provided in real time or may be provided on demand.

1 is a diagram schematically showing an IPTV system according to an embodiment of the present invention.

Referring to FIG. 1, in terms of providing a content service, the IPTV system may be divided into a content provider (CP), a service provider (SP), a network provider (NP), and a user. have.

The content provider produces and provides various contents. As shown in FIG. 1, the content provider includes a terrestrial broadcaster, a cable SO, or a MSO, a satellite broadcaster, and an internet broadcaster. (Internet broadcaster) and the like.

The service provider provides a service package of contents provided by the content provider. For example, the service provider of FIG. 1 packages a first terrestrial broadcast, a second terrestrial broadcast, a cable MSO, satellite broadcast, various Internet broadcasts, and provides the same to a user.

The network provider provides a network for providing the service to the user. The user may build a home network end user (HNED) to receive the service.

Conditional access, content protection, or the like may be used as a means for protecting the content transmitted from the IPTV system. As one example for the above-mentioned restriction reception or content protection, a method such as a cable card or a downloadable conditional access system (DCAS) may be used.

2 is a diagram schematically illustrating a network TV system according to an embodiment of the present invention.

Referring to FIG. 2, a network TV is a digital broadcast receiver capable of receiving digital broadcasts and receiving and providing Internet services to viewers. Network TV may be referred to as broadband TV and includes web TV. The web TV is a digital broadcast receiver that receives and provides an internet service based on the web.

The network TV may receive an Internet service directly from a content provider via the Internet. The network TV may request a search for the necessary information from the content provider and receive the result and provide it to the user. In addition, the network TV may download the content and software requested by the user, and may play the downloaded content or execute the downloaded software. It may also receive a web page from a content provider and display the web page received through a browser.

In addition, the network TV may not only receive a broadcast service through the Internet, but also receive a broadcast service from a terrestrial broadcaster through terrestrial, and may use a cable system operator (cable system operator) or a cable. A broadcast service may be received from a multiple system operator (MSO), and a broadcast service may be received from a satellite broadcaster through a satellite.

The digital broadcast receiver may receive a broadcast service from a service provider or a content provider using a unicast or multicast scheme.

3 and 4 schematically illustrate multicast and unicast schemes, respectively.

3 and 4, the unicast method is a method of transmitting data 1: 1 between one sender and one receiver. For example, in the unicast scheme, when a receiver requests data from a server, the server transmits data to the receiver according to the request. Multicasting is a method of transmitting data to a plurality of recipients of a specific group. For example, the server can send data to multiple pre-registered receivers at once. The Internet Group Management Protocol (IGMP) protocol may be used for the multicast registration.

FIG. 5 is a diagram illustrating a hierarchical structure for broadcasting a Content Download Service (CDS) of IPTV.

Referring to FIG. 5, the service provider delivers data contents for CDS to an IPTV receiver using a transport protocol. The delivered data content for CDS is stored in the storage of IPTV. The stored data contents for CDS can be executed at the request of the user or the like. Here, the transport protocol may be FLUTE (File Delivery over Unidirectional Transport) mounted on ALC / LCT over IP / UDP, DVB-STP, DVB data / object carousel, File Transfer Protocol (FTP), HTTP (hypertext transfer). protocol) and the like, and the above-described protocol may use other transmission protocols as an example.

When FLUTE is used as the transport protocol, the presence or absence of a CDS service may be known to an IPTV receiver through service discovery and selection (SD & S), and the details of the content may include metadata in a TV Anytime format. Can be found through:

Data contents for CDS may include various types of contents such as A / V contents, data contents, and game contents.

As described above, the digital broadcasting receiver of the present invention including the IPTV may receive various contents and output the provided contents on a display screen according to a user's selection.

6 is a block diagram showing the configuration of a preferred embodiment of a digital broadcast receiver according to the present invention.

Referring to FIG. 6, the digital broadcast receiver 600 according to an embodiment of the present invention may include a separate tuner to receive terrestrial broadcast, cable broadcast, satellite broadcast, and the like. However, in the present invention, for the convenience of description, the description will be made mainly on the part of processing the content transmitted using the Internet network.

The digital broadcast receiver 600 includes a network interface unit 602, an IP manager 604, a service delivery manager 606, a demultiplexer 608, a data decoder 610, a decoder 612, a display unit 616, an application. The manager 618 includes a service information database unit 622, a service discovery manager 624, a service control manager 626, a metadata manager 628, and a content database unit 630.

The network interface unit 602 receives packets received from a network and transmits the packets to the network. That is, the network interface unit 602 receives an IP packet for transmitting broadcast data from a service providing server through a network. The broadcast data includes content, update messages indicating whether to update the content, metadata, service information data, and software code. In addition, the service information may include service information for the real-time broadcast service and service information for the Internet service.

The IP manager 604 is involved in packet transmission from the source to the destination for the packet received by the digital broadcast receiver 600 and the packet transmitted by the digital broadcast receiver 600. The IP manager 604 classifies the received packet to correspond to an appropriate protocol, and classifies the packet into a service delivery manager 606, a service discovery manager 624, a service control manager 626, and a metadata manager 628. Outputs

The service delivery manager 606 is responsible for controlling the received service data. For example, when controlling real-time streaming data, RTP / RTCP (Real-Time Transport Protocol / RTP Control Protocol) may be used. When transmitting the real-time streaming data using the RTP, the service delivery manager 606 parses the received data packet according to the RTP and transmits it to the demultiplexer 608 or the control of the service manager 620. According to the content database 630. The service delivery manager 606 controls the network reception information to be fed back to a server that provides a service using RTCP.

The demultiplexer 608 demultiplexes the received packet into audio, video, PSI (Program Specific Information) data, and the like, and transmits the demultiplexer 608 to the decoder 612 and the data decoder 610, respectively.

The data decoder 610 decodes service information such as program specific information (PSI). That is, the data decoder 610 receives and decodes the demultiplexed PSI section, the Program and Service Information Protocol (PSIP) section, or the Service Information (DVB-SI) section from the demultiplexer 608.

In addition, the data decoder 610 decodes the received sections to create a database of service information, and stores the database of the service information in the service information database unit 622.

The decoder 612 decodes the video data and the audio data received at the demultiplexer 608. The decoder 612 includes an audio decoder 613 and a video decoder 604 for this purpose. The audio data decoded by the audio decoder 613 is provided to the user through a speaker (not shown), and the video data and content decoded by the video decoder 604 are provided to the user through the display unit 616.

The application manager 618 manages the overall state of the digital broadcast receiver 600, provides a user interface, and manages other managers. To this end, the application manager 618 includes a user interface manager 619 and a service manager 620.

The user interface manager 619 provides a graphical user interface (GUI) for a user using an OSD (On Screen Display), etc., and receives a key input from a user to perform a receiver operation according to the input.

For example, the user interface manager 619 receives a content channel setting input for predetermined content from the user. In addition, the user interface manager 619 transmits the key input signal to the service manager 620 when the user receives a key input related to a channel change. In addition, when a key input regarding a specific content channel or a key input regarding a request for update information for a specific content channel is received from the user, the key input signal is transmitted to the service manager 620.

The user interface manager 619 controls to output a virtual keyboard or a virtual keypad on the screen. The user may select and input a specific virtual key on the output virtual keyboard or the virtual keypad by using the arrow keys and the numeric keys of the remote controller. For example, the user may input a user ID and password by selecting a virtual key, and the user interface manager 619 may perform user authentication based on the user ID and password input from the user.

The user interface manager 619 may receive a content list display command from the user. Upon receiving a content list display command, the user interface manager 630 controls to display a graphic user interface that provides a content list including information about at least one content. Also, the user interface manager 619 may receive a hidden setting command and a hidden view command from the user. In this case, the hidden setting command is a request for setting the hidden function. When the hidden setting command is input, the user interface manager 619 hides the information on the content for which the hidden function is requested from the graphic user interface. The hidden view command is for displaying information on content in which the hidden function is set. When the hidden view command is input, the user interface manager 619 displays information about the content for which the hidden function is requested in the graphic user interface. The user interface manager 619 may request a password set for the corresponding content when the hidden function is set, and may request a password set for the corresponding content when the hidden function is released.

The content on which the information is displayed on the graphical user interface may be content stored in the content database unit 630, or content whose metadata is stored in the service information database unit 622. In the case where the metadata is stored in the service information database unit 622, when a content playing command requesting the playing of the content is input, the service manager 620 may control the content to be received from the service provider or the content provider. Can be.

The content database unit 630 allocates a content channel to the content, determines index data corresponding to the content, and stores the index data in association with the allocated content channel information.

For example, if the content is video or audio data "growth video" stored in the broadcast receiver internal memory, the content database unit 630 is assigned to the directory of the content 'D / video / growth video ...' Store in association with channel 'ch 1'.

In addition, for example, when the content is video or audio data stored in a networked server '11 King Sejong ', the content channel database unit assigns the network address' 198.7 // Great King Sejong / de // 11 times' of the corresponding content. It can be stored in association with the content channel 'ch 3'.

Also, for example, when the content is an Internet site 'Yahoo Widget', the content channel database unit assigns the web address' http //: yahoo // wizet // ... 'of the corresponding Internet site to the content channel' ch 2. You can save about

Meanwhile, according to an embodiment, when the broadcast receiver receives a change command of the content channel from the user, the broadcast receiver determines the index data corresponding to the changed content channel and outputs the corresponding content.

In this case, when the change command of the content channel is an increase or decrease command of the channel, the index data corresponding to the content of the next or previous content channel stored in the content database unit is read, and the read next or previous content You can output

In addition, the content database unit 630 may store the authentication information for the Internet service list and the server account. Here, the Internet service list is a list including information about a content provider or a service provider that provides an Internet service. For example, the Internet service list may include at least one of a name of a server, access information of the server, and guide information about a service provided by the server. The access information of the server may be any one of an internet address and a uniform resource locator (URL).

When the application manager 618 receives an output command of the content channel from the user, the application manager 618 reads index data stored in the content database unit and outputs the content.

When the application manager 618 receives a change command of the content channel from the user, the application manager 618 reads the index data of the changed channel and outputs the content.

At this time, if the channel change command is a channel increase or decrease input, the broadcast receiver reads index data corresponding to the contents of the next or previous sequence of content channels stored in the contents database unit, and reads the contents of the read next or previous sequence. Output

When the user selects a content channel mode and selects an output command of the content channel, the application manager 618 may read the index data stored in the content database unit 630 to output the content.

In addition, the application manager 618 determines whether the channel selected by the user is a content channel or a general broadcast channel, and if it is determined as a content channel, reads index data stored in the content database unit 630 and outputs the content. Can be.

In addition, when the user selects the content channel mode and receives a change command of the content channel, the application manager 618 may read the index data corresponding to the changed content channel and output the content command.

In this case, the content is video or audio data stored in the internal memory of the broadcast receiver, the index data may be a directory of the content, the content is video or audio data stored in a server connected to the broadcast receiver, the index The data may be a network address of the content, the content may be a predetermined internet site, and the index data may be a web address of the internet site.

When the application manager 618 receives a predetermined key input (for example, a menu command) from among the outputs of the contents, the application manager 618 may output the upper folder of the directory or folder including the contents.

In addition, the application manager 618 may output the update information or the change information when new content is updated in a directory or folder including content, or when the content is changed in the directory or folder.

When the application manager 618 receives a user internet service mode request command, the application manager 618 may control to display information included in the internet service list. That is, the application manager 618 may control to display at least one of a name of a server included in the Internet service list, access information of the server, and guide information about a service provided by the server. In this case, the access information may be displayed as a link for accessing the corresponding server. That is, the user can click the access information displayed on the screen to allow the digital broadcast receiver to access the corresponding server. In addition, a specific picture or icon may be displayed for each server name included in the Internet service list. The user internet service mode request command may be input through a hot key on the remote controller, may be input through a virtual keypad or a virtual key on a virtual keyboard, and may be input through a specific menu displayed on a screen.

When the application manager 618 receives the user internet service request command, the application manager 618 connects to the server associated with the received user internet service request command, and displays a screen for requesting authentication information about the account of the connected server. Here, when the user clicks the access information displayed on the screen, a user internet service request command may be input, and when the user clicks a picture or icon of the corresponding server displayed on the screen, the user internet service request command may be input. Can be entered.

The display unit 616 outputs the content to the screen. In addition, the display unit 616 displays an image generated by the browser on the screen.

The service manager 620 controls a manager associated with a service, such as a service delivery manager 606, a service discovery manager 624, a service control manager 626, and a metadata manager 628 and an IG-OITF client.

In addition, the service manager 620 creates a channel map of a general broadcast and selects a channel using the channel map according to a key input received from the user interface manager 619. The service manager 620 receives service information of a channel from the data decoder 610 and sets the audio / video packet identifier (PID) of the selected channel to the demultiplexer 608.

The service manager 620 may also execute a browser to process the received service. The browser may display the service information and control the content to be played back. The browser can also run applications, applications associated with content. In addition, the browser may process and display a web page provided by the server on the screen. The service information may be provided in the form of a web page from the server.

The service discovery manager 624 provides information necessary for selecting a service provider providing a service. Upon receiving a signal regarding channel selection from the service manager 620, the service discovery manager 624 uses the information to find a service.

The service control manager 626 is responsible for selecting and controlling a service. For example, if a user selects a live broadcasting service like the conventional broadcasting method, IGMP or RTSP is used. If a user selects a service such as VOD (Video On Demand), RTSP is used to select and control the service. Perform The RTSP protocol may provide a trick mode for real time streaming. In addition, the service control manager 926 may initialize and manage a session through the IMC gateway using an IP multimedia subsystem (IMS) or a session initiation protocol (SIP). The protocols are one embodiment, and other protocols may be used depending on implementation.

The metadata manager 628 manages metadata associated with a service and stores the metadata in the service information database unit 622.

The service information database unit 622 stores service information decoded by the data decoder 610, metadata managed by the metadata manager 628, and information necessary to select a service provider provided by the service discovery manager 624. . In addition, the service information database unit 622 may store setup data for the system.

The service information database unit 622 and the content database unit 630 may be implemented using nonvolatile memory (NVRAM) or flash memory, respectively, and are divided into two logically separated areas on the same storage area. Can be implemented.

The content database unit 630 may store content controlled to be stored by a PVR manager (not shown). The PVR manager collects metadata related to the stored content and generates additional information (thumbnail images, etc.) used for user use.

7 is a block diagram showing the configuration of another preferred embodiment of a digital broadcast receiver according to the present invention.

Referring to FIG. 7, the digital broadcast receiver 700 according to another embodiment of the present invention may include a video / audio processor 701, an interface unit 750, a storage unit 760, a display unit 770, and an audio output unit. 775 and the controller 780 may be included.

The video / audio processor 701 processes an input video signal or an audio signal to output an image or an audio signal to the display unit 770 and the audio output unit 775 of the digital broadcast receiver 700. To this end, the image / audio processor 701 may include a signal input unit 710, a demodulator 720, and a signal processor 740. In addition, the signal input unit 710 may include a tuner unit 711, an A / V input unit 712, a USB input unit 713, a wireless signal input unit 714, and a network unit 715.

The tuner 711 selects an RF broadcast signal corresponding to a channel selected by a user from among RF (Radio Frequency) broadcast signals received through an antenna, and converts the selected RF broadcast signal into an intermediate frequency signal or a baseband video or audio signal. To convert. For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF). If the analog broadcast signal is converted into an analog baseband video or audio signal (CVBS SIF). That is, the tuner 711 may process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal CVBS SIF output from the tuner 711 may be directly input to the signal processor 740.

In addition, the tuner 711 may receive an RF broadcast signal of a single carrier according to the Advanced Television System Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to the digital video broadcasting (DVB) scheme.

According to another embodiment of the present invention, the digital broadcast receiver 700 may include at least two tuner units. When the second tuner unit includes at least two tuner units, the second tuner unit selects an RF broadcast signal corresponding to a channel selected by a user from among RF broadcast signals received through an antenna, similarly to the first tuner unit, and intermediates the selected RF broadcast signal. Convert to frequency signal or baseband video or audio signal.

In addition, the second tuner may sequentially select the RF broadcast signals of all the broadcast channels stored through the channel memory function among the received RF broadcast signals and convert them to intermediate frequency signals or baseband video or audio signals. The second tuner may periodically perform the conversion of all broadcast channels. Accordingly, the digital broadcast receiver 700 may display an image of a broadcast signal converted through the first tuner unit and provide images of various channels converted through the second tuner unit in the form of thumbnails. In this case, the first tuner unit converts the main RF broadcast signal selected by the user into an intermediate frequency signal or a baseband video or audio signal, and the second tuner unit sequentially / periodically selects all the RF broadcast signals except for the main RF broadcast signal. This may be converted into an intermediate frequency signal or a baseband video or audio signal.

The demodulator 720 receives the digital IF signal DIF converted by the tuner 711 and performs a demodulation operation. For example, when the digital IF signal output from the tuner 711 is an ATSC scheme, the demodulator 720 performs 8-VSB (8-Vestigal Side Band) demodulation. As another example, when the digital IF signal output from the tuner unit 711 is a DVB scheme, the demodulator 720 performs carded orthogonal frequency division modulation (COFDMA) demodulation.

In addition, the demodulator 720 may perform channel decoding. To this end, the demodulator 720 includes a trellis decoder, a de-interleaver, a reed solomon decoder, and the like. Soloman decryption can be performed.

The demodulator 720 may output a stream signal TS after performing demodulation and channel decoding. In this case, the stream signal may be a signal multiplexed with a video signal, an audio signal, or a data signal. For example, the stream signal may be an MPEG-2 TS (Transport Stream) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, or the like. In more detail, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

The stream signal output from the demodulator 720 may be input to the signal processor 740. After the signal processor 740 performs demultiplexing and signal processing, the signal processor 740 outputs an image to the display unit 770 and outputs an audio signal to the audio output unit 775.

In addition, in the case of a digital broadcast receiver having at least two tuners, a number of demodulators corresponding thereto may be provided. The demodulator may be provided separately according to the ATSC scheme and the DVB scheme.

In addition, the signal input unit 710 may connect an external device to the digital broadcast receiver 700. The external device refers to various types of video or audio output devices such as a digital versatile disk (DVD), a Blu-ray, a game device, a camcorder, a computer (laptop), and the like. The signal input unit 710 inputs an image, audio, or data signal of an external device to the signal processor 740 capable of processing the image signal and the audio signal of the digital broadcast receiver 700.

The A / V input unit 712 of the signal input unit 710 may input an Ethernet terminal, a USB terminal, and a Composite Video Banking Sync to input a video and audio signal of an external device to the digital broadcast receiver 700. ) Terminal, component terminal, S-video terminal (analog), DVI (Digital Visual Interface) terminal, HDMI (High Definition Multimedia Interface) terminal, RGB terminal, D-SUB terminal, IEEE 1394 terminal, SPDIF terminal, Liquid HD terminals and the like. The analog signal input through the CVBS terminal and the S-video terminal may be converted into a digital signal and input to the signal processor 740. The digital signal input through other input terminals may be input to the signal processor 740 without performing an analog / digital conversion process.

The USB input unit 713 may input a video and audio signal through a USB terminal.

The wireless signal inputter 714 may connect the digital broadcast receiver 700 to a wireless network. The digital broadcast receiver 700 may be connected to the wireless Internet through the wireless signal input unit 714. For wireless Internet access, wireless LAN (Wi-Fi), wireless broadband (Wibro), world interoperability for microwave access (Wimax), high speed downlink packet access (HSDPA) communication standards, and the like may be used. In addition, the wireless signal inputter 714 may perform short-range wireless communication with another electronic device. For example, it may be networked with other electronic devices according to Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee communication standards.

In addition to the wireless signal input unit 714, or via the Ethernet terminal, or the signal input unit 710 further includes a network unit 715 for efficient network connection and management, the network unit 715 is a digital broadcast The receiver 700 may be connected to a network through a PSTN, a LAN, a cable, or the like.

Meanwhile, the signal input unit 710 may be connected through various set top boxes and at least one of the various terminals described above to perform input / output operations with the set top box. For example, when the set-top box is a set-top box for an Internet Protocol (IP) TV, video, audio, and data signals processed by the set-top box for IPTV may be transmitted to the control unit 760 to enable bidirectional communication. Signals processed by the controller 760 may be transferred to the set-top box for IPTV.

Therefore, the digital broadcast receiver according to the present invention can process signals transmitted through wired and wireless networks, as well as broadcast signals through radio waves and signals from external input devices. That is, the digital broadcast receiver according to the present invention receives broadcast data provided by the service providing server through a network. The broadcast data includes content, update messages indicating whether to update the content, metadata, service information data, and software code. In addition, the service information may include service information for the real-time broadcast service and service information for the Internet service.

The signal processor 740 may demultiplex the received stream signal, for example, the MPEG-2 TS, and divide the received stream signal into a video signal, an audio signal, and a data signal, respectively. In addition, the signal processor 740 may perform image processing of the demultiplexed image signal. For example, when the demultiplexed video signal is an encoded video signal, it may be decoded. Specifically, when the demultiplexed video signal is an encoded video signal of MPEG-2 standard, it may be decoded by an MPEG-2 decoder. In addition, when the demultiplexed video signal is a video signal of the H.264 standard according to the Digital Multimedia Broadcasting (DMB) scheme or DVB-H, it may be decoded by the H.264 decoder.

In addition, the signal processor 740 may process brightness, tint, and color of the image signal. The image signal processed by the signal processor 740 is displayed on the display 770. In addition, the signal processor 740 may perform voice processing of the demultiplexed voice signal. For example, if the demultiplexed speech signal is a coded speech signal, it can be decoded. Specifically, when the demultiplexed speech signal is an encoded speech signal of MPEG-2 standard, it may be decoded by an MPEG-2 decoder. In addition, when the demultiplexed speech signal is an encoded speech signal of MPEG 4 Bit Sliced Arithmetic Coding (BSAC) standard according to the terrestrial digital multimedia broadcasting (DMB) scheme, it may be decoded by an MPEG 4 decoder. In addition, when the demultiplexed speech signal is an encoded audio signal of the AAC (Advanced Audio Codec) standard of MPEG 2 according to the satellite DMB scheme or DVB-H, it may be decoded by the AAC decoder.

In addition, the signal processor 740 may process base, treble, volume control, and the like.

The voice signal processed by the signal processor 740 is output to the voice output unit 775. In addition, the signal processor 740 may perform data processing of the demultiplexed data signal. For example, when the demultiplexed data signal is an encoded data signal, it may be decoded. The encoded data signal may be EPG (Electronic Program Guide) information including broadcast information such as a start time and an end time of a broadcast program broadcasted in each channel. For example, the EPG information may be TSC-PSIP (ATSC-Program and System Information Protocol) information in the ATSC scheme, and may include DVB-Service Information (DVB-SI) in the DVB scheme. . The ATSC-PSIP information or the DVB-SI information may be information included in the aforementioned stream, that is, the header (4 bytes) of the MPEG-2 TS.

In addition, the signal processor 740 may perform OSD (On Screen Display) processing. In detail, the signal processor 740 may display an image on the screen of the display unit 770 based on a video signal processed, at least one of the data processed data signals, and a user input signal input through the remote controller 705. Various information can be displayed in a graphic or text format.

The storage unit 760 may store a program for processing and controlling each signal in the controller 780, and may store a signal processed video signal, an audio signal, or a data signal. In addition, the storage unit 760 may perform a function for temporarily storing an image, audio, or data signal input to the signal input unit 710.

In addition, the storage unit 760 may store a list of Internet services, and may store authentication information about an account of a server.

The storage unit 760 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), It may include at least one type of storage medium such as RAM, ROM (EEPROM, etc.). The digital broadcast receiver 700 may reproduce a file (video file, still image file, music file, document file, etc.) stored in the storage unit 760 and provide the same to the user.

The controller 780 controls overall operations in the digital broadcast receiver 700. The controller 780 may receive a signal transmitted from the remote controller 705 through the interface unit 750. The controller 780 determines a command input by the user to the remote controller 705 through the received signal and controls the digital broadcast receiver 700 to correspond thereto. For example, when a content list display command is input from the remote controller 705, the controller 780 displays a graphic user interface for providing a content list. In addition, the controller 780 may receive a hidden setting command, a hidden view command, and a content playing command from the remote control device 705, and control the corresponding operation to be performed on the received command.

As another example, when a user inputs a predetermined channel selection command, the controller 780 controls the tuner 711 to input the selected channel through the signal input unit 710. In addition, the signal processor 740 controls the video signal and the audio signal of the selected channel. In addition, the control unit 740 controls the channel information selected by the user to be output through the display unit 770 or the audio output unit 775 together with the processed image signal and the audio signal.

As another example, the user may input another type of video or audio output command through the remote control device 705. That is, the user may want to watch a camera or camcorder video signal input through the USB input unit 713 instead of the broadcast signal. In this case, the controller 780 processes the video signal or the audio signal input through the USB input unit 713 of the signal input unit 710 through the signal processor 740 and controls the display unit 770 or the audio output unit 775. The video / audio processor 701 may be controlled to be output through the control unit.

The controller 780 may determine the user command input to the user input unit 755 formed on the digital broadcast receiver 700 in addition to the command input through the remote controller 705 and control the digital broadcast receiver 700 to correspond thereto. Can be. For example, a user inputs a digital broadcast receiver 700 on / off command, a channel change command, a volume change command, a content list display command, a hidden setting command, a hidden view command, and a content playback command through the user input unit 755. can do. The user input unit 755 may be formed of a button or a key formed in the digital broadcast receiver 700. The controller 780 may determine whether the user input unit 755 is manipulated and control the digital broadcast receiver 700 accordingly.

In addition, the controller 780 may execute a browser to process the received service. The browser may display the service information and control the content to be played back. The browser can also run applications, applications associated with content. In addition, the browser may process and display a web page provided by the server on the screen. The service information may be provided in the form of a web page from the server. In addition, the graphical user interface for providing a content list may be a browser.

8 is a diagram illustrating a screen displaying a message for logging into a digital broadcast receiver according to the present invention.

Referring to FIG. 8, the display 700 displays a login message 800 requesting a user ID and a password on a screen. The controller 780 may control the login message 800 to be displayed when booting, requesting a user login, and accessing a content provider or a service provider.

The user may input a user ID and a user password using the remote controller 705 and the user input unit 755, and the display unit 770 may include the user ID and the user password, respectively. Mark on Password. In addition, the user can click the button (Login) to input a user authentication execution command.

When a user authentication execution command is input, the controller 780 performs user authentication based on the input user ID and user password.

9 is a diagram illustrating an embodiment of a screen on which a graphic user interface for providing a content list is displayed.

Referring to FIG. 9, the display unit 770 displays a graphical user interface 900 that provides a content list. Herein, the controller 780 may control the graphic user interface 900 to be displayed on the initial screen, and control the graphic user interface 900 to be displayed when a content list display command is input.

The graphical user interface 900 includes a selection area 910 and a list area 920. At least one folder name may be displayed in the selection area 910. The folder name may indicate a folder generated in the storage 700 or may indicate a type of content. Types of content may be classified according to the genre of the content, may be classified according to the content provider providing the content, and may be classified according to the grade of the content. When the folder name indicates the type of the content, the controller 780 may calculate the folder name from the metadata.

The list area 920 may display information about contents belonging to a folder indicated by the selected folder name among the folder names. The information on the content may be a content name, a type of content, a content reproduction time, and a content provider name providing the content.

The user can move the pointer 901 to locate the folder name (folder 2) and select a folder name (folder 2) by clicking a button (e.g., a select button) of the remote control device 800. When the folder name (folder 2) is selected, the display 911 of the folder name (folder 2) is changed and information (cp1, cp2, cp3, cp4, cp5) for each content belonging to the folder name (folder 2) is listed. Is displayed in area 920.

10 illustrates another embodiment of a screen on which a graphic user interface for providing a content list is displayed.

Referring to FIG. 10, a user may select at least one piece of information from CP1, CP2, CP3, CP4, and CP5, that is, information about each content displayed on the graphical user interface 1000, using the pointer 1001.

When the user selects CP1, CP2 and CP4, an indication indicating that CP1, CP2 and CP4 has been selected is displayed on the screen. At this time, the user may set the hidden function to the selected CP1, CP2 and CP4 by inputting a hidden setting command. The hiding function is to prevent the information of the corresponding content from being displayed. That is, when the hiding function is set in the CP1, CP2, and CP4, the CP1, CP2, and CP4 are not displayed on the graphical user interface 1000.

The user may input a hidden setting command by clicking a predetermined button (not shown) provided by the graphic user interface 1000, and may input a hidden setting command by clicking a menu item of a pop-up menu that is separately displayed.

FIG. 11 is a diagram illustrating an embodiment of a screen displaying a message requesting input of a password to be set in content.

Referring to FIG. 11, when a hidden setting command is input, the controller 780 controls the display 770 to display a message 1100 requesting input of a password.

The message 1100 includes a password input area 1110, an input button 1120, and an uninput button 1130. The user may input the password by selecting the password input area 1110, and input a password setting command by clicking the input button 1120. When a password setting command is input, the controller 780 sets the input password to content indicated by the selected information. For example, the controller 780 sets the input password to the content indicated by the CP1, CP2, and CP4 selected in FIG. 10, respectively.

In addition, the user may click the non-input button 1130 to input a password unset command. When a password non-setting command is input, the controller 780 sets a hidden function to the content indicated by the selected information without setting a password on the content.

12 illustrates another embodiment of a screen on which a graphic user interface for providing a content list is displayed.

Referring to FIG. 12, when the hiding function is set in the CP1, CP2, and CP4 selected in FIG. 10, the graphical user interface 1200 does not display CP1, CP2, and CP4. That is, the graphical user interface 1200 hides CP1, CP2, and CP4, and displays CP3 and CP5.

FIG. 13 is a diagram illustrating an embodiment of a screen on which a pop-up menu is displayed. FIG.

Referring to FIG. 13, when a predetermined key signal (for example, a menu button signal) is input from the remote controller 705 or the user input unit 755 in a state where focus is placed on the graphic user interface 1300, a popup is displayed. Menu 1350 may be displayed.

The pop-up menu 1350 may include at least one of "set hidden", "view hidden", and "play" as a menu item. The user may input a hidden view command by clicking “show hidden” using the pointer 1301.

14 illustrates another embodiment of a screen on which a graphic user interface for providing a content list is displayed.

Referring to FIG. 14, when the hidden view command is input, the controller 780 checks whether there is a password-set content among the contents in which the hidden function is set, and if there is no content in which the password is set, the hidden function is set to the content. Information is displayed on the graphical user interface.

If a password is not set for each content indicated by CP1, CP2, and CP4, the controller 780 adds the CP1, CP5 to the CP3 and CP5 in addition to the CP3 and CP5 displayed in the graphical user interface 1200 of FIG. Control CP2 and CP4 to display more.

In addition, when a specific folder is selected and a hidden setting command is input, the controller 780 controls the graphic user interface 1400 to hide the specific folder. For example, when a folder (folder 3 is selected and a hidden setting command is input in the graphic user interface 900 of FIG. 9), the graphic user interface 1400 hides the folder (folder 3).

FIG. 15 is a diagram illustrating an embodiment of a screen displaying a message asking whether to display content having a password set. FIG.

Referring to FIG. 15, when a hidden view command is input, the controller 780 checks whether there is a password-set content among the contents in which the hidden function is set, and, if there is a password-set content, views the password-set content. Control to display a message 1500 asking whether or not.

The message 1500 includes a prompt and a button (yes) and a button (no) asking whether to view the password-set contents.

FIG. 16 is a diagram illustrating an embodiment of a screen displaying a message for requesting input of a password set for content.

Referring to FIG. 16, when a button (eg) is clicked in FIG. 15, the controller 780 controls the message 1600 for requesting input of a password to be displayed. In this case, the controller 780 may check whether there is a content having a password set among the contents in which the hidden function is set, and may control the message 1600 to be displayed immediately when there is a content having the password set.

The message 1600 may include a password input area 1610, an input button 1620, and a non-input button 1630. The user may input a password using the remote control device 705 and the user input unit 755, and the password input area 1610 displays the input password. In addition, the user may click an input button 1620 to input a password input command. When a password input command is input, the controller 780 controls the information on the set content of the input password to be displayed on the graphical user interface. If the password set for the content indicated by CP1, CP2, and CP4 is the password displayed in the password input area 1610, the controller 780 adds to the CP3 and CP5 displayed in the graphical user interface 1200 of FIG. The graphical user interface controls to further display CP1, CP2 and CP4.

In addition, the user may click the non-input button 1630 to input a non-password input command. When a non-password input command is input, the controller 780 may control information on content for which a password is not set to be displayed on the graphical user interface.

17 illustrates another embodiment of a screen on which a graphic user interface for providing a content list is displayed.

Referring to FIG. 17, when a password is not set in CP1 and CP2 and a password input command is input while a password is set in CP4, the graphic user interface 1700 is displayed on the graphic user interface 1200 of FIG. 12. In addition to CP3 and CP5, CP1 and CP2 are further displayed.

18 is a flowchart illustrating a process of performing an embodiment of a content management method according to the present invention.

Referring to FIG. 18, the display unit 770 displays a graphic user interface in operation S1800. Here, the graphical user interface may be the graphical user interface 900 illustrated in FIG. 9.

The interface unit 750 receives at least one piece of information about the content displayed on the graphic user interface unit in operation S1810. In this case, at least one piece of information on information can be selected according to the method described above with reference to FIG. 10.

The controller 780 checks whether a hiding setting command is input (S1820).

When the hiding setting command is input, the controller 780 requests input of a password for content indicated by the selected information (S1830). Herein, the controller 780 may control the message 1100 illustrated in FIG. 11 to be displayed.

The controller 780 checks whether a password has been input (S1840).

If a password is input, the controller 780 sets a password to content indicated by the selected information (S1850).

The controller 780 hides information on the content indicated by the selected information so that the information is not displayed on the graphic user interface in operation S1860.

If a password is not input, the controller 780 performs step S1860.

19 is a flowchart illustrating a process of performing another preferred embodiment of a content management method according to the present invention.

Referring to FIG. 19, the controller 780 displays a graphic user interface in operation S1900. Here, the graphical user interface may be the graphical user interface 900 illustrated in FIG. 9, and may be the graphical user interface 1200 illustrated in FIG. 12.

The controller 780 checks whether a hidden view command has been input (S1905). Here, the user may input a hidden view command through a menu item included in the pop-up menu 1350 illustrated in FIG. 13.

When the hidden view command is input, the controller 780 checks whether the password-set content exists among the contents in which the hidden function is set (S1910).

If there is no password-set content, the controller 780 controls the information on the content on which the hidden function is set to be displayed on the graphic user interface in operation S1915. The graphic user interface may be the graphic user interface 1400 illustrated in FIG. 14.

If there is a password-set content, the controller 780 controls to display a message requesting input of a password (S1920). The message may be the message 1600 illustrated in FIG. 16. In addition, before displaying the message, the controller 780 may display the message 1500 illustrated in FIG. 15.

The controller 780 checks whether a password has been input (S1925).

If a password is not input, the controller 780 performs step S1915.

If a password is input, the controller 780 checks whether there is content for which the input password is set (S1930).

If the content for which the input password is set does not exist, the controller 780 performs step S1915.

If there is a content in which the input password is set, the controller 780 controls the information on the content to be displayed on the graphic user interface in operation S1935. In this case, the controller 780 may control to further display information on content in which a password is not set among contents in which a hidden function is set.

The controller 780 checks whether a content playback command for requesting playback of content has been input (S1940).

When a content playback command is input, the signal input unit 710 receives content from a content provider (S1945).

The display unit 770 displays the received content on the screen (S1950).

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer apparatus is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission via the Internet) . The computer-readable recording medium may also be distributed to networked computer devices so that computer readable code can be stored and executed in a distributed manner.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific preferred embodiments described above, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such modifications are within the scope of the claims. Hereinafter, preferred embodiments of the present invention can be specifically realized. It demonstrates with reference to one figure. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited.

The terms used in the present invention have been selected as general terms widely used as possible in consideration of the functions in the present invention, but may vary according to the intention or custom of a person skilled in the art or the emergence of a new technology. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, it is intended that the terms used in the present invention should be defined based on the meanings of the terms and the general contents of the present invention rather than the names of the simple terms.

Claims (13)

In the method of managing content in a digital broadcast receiver,
Displaying a graphical user interface providing a content list comprising information about at least one content;
Receiving a hidden view command for requesting to release the hidden function for the content in which the hidden function is set;
Checking whether there is content with a password set among the contents with the hidden function set;
Requesting input of a password when there is content in which the password is set; And
And receiving a password and displaying information on the content in which the input password is set on the graphical user interface. The method of claim 1,
Receiving at least one content selection command of a content list displayed on the graphical user interface and receiving a hidden setting command requesting setting of a hiding function;
Requesting input of a password for the selected content; And
Receiving a password, setting the input password to the selected content, and hiding information on the set content in the graphical user interface. The method of claim 1,
And displaying information on contents in which a password is not set among contents in which a hidden function is set. The method of claim 1,
And the password is set differently for each content. The method of claim 1,
And the content is stored content. The method of claim 1,
Receiving a content playback command for requesting playback of the displayed content; And
Receiving the requested content from a server, and displaying the received content. A display unit configured to display a graphic user interface providing a content list including information on at least one content;
An interface unit for receiving a hidden view command for requesting to release the hidden function for the content in which the hidden function is set; And
Check whether there is password-protected content among the contents for which the hidden function is set, and if there is content with the password set, controls to display a message requesting the input of the password, and if the password is input, the input. And a controller configured to control the display of information on the set password, on the graphic user interface. The method of claim 7, wherein
The interface unit receives at least one content selection command from the list of contents displayed in the graphical user interface and receives a hidden setting command for requesting setting of a hiding function.
The controller requests an input of a password for the selected content, and if a password is input, sets the input password to the selected content and controls the information on the set content to be hidden in the graphical user interface. Digital broadcast receiver, characterized in that. The method of claim 7, wherein
The control unit,
Digital broadcast receiver, characterized in that for controlling the display so that more information about the content is set password is not set among the hidden function. The method of claim 7, wherein
And the password is set differently for each content. The method of claim 7, wherein
And the content is stored content. The method of claim 7, wherein
The control unit,
And receiving a requested content from a server when a content playback command for requesting playback of the displayed content is input. The method of claim 7,
And the digital broadcast receiver is a network TV.

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