JP7167278B2 - Content protection processing method - Google Patents

Description

The present invention relates to a broadcast receiver.

One of the extended functions of the digital broadcasting service is data broadcasting that transmits digital data by broadcast waves and displays various information such as weather forecasts, news, and recommended programs. A large number of television receivers capable of receiving data broadcasting are already on the market, and a large number of technologies related to data broadcasting reception, including the following patent document 1, have been published.

Japanese Patent Application Laid-Open No. 2001-186486

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

SUMMARY OF THE INVENTION It is an object of the present invention to provide a broadcast receiver capable of executing functions with higher added value.

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

To give an example, a content protection processing method in a broadcast receiving device that receives digital broadcast content includes 4K content having a pixel count of 3840×2160 and content protection of the 4K content transmitted by the digital broadcast. a receiving step of receiving control information related to; a storing step of storing the 4K content received in the receiving step; and a video of the 4K content received in the receiving step or the 4K content stored in the storing step A video output step of outputting the video to the outside as it is without pixel number conversion, or outputting the video to the outside after pixel number conversion; a copy step of copying or copying to the outside after converting the number of pixels; and a move processing step of moving the 4K content accumulated in the accumulation step to the outside via an interface, wherein the accumulation step, the The processing states of the video output step and the copy step include a first video output processing state in which the 4K content is output to the outside in the video output step without being stored in the storage step; a content storage processing state in which the 4K content is stored; a second video output processing state in which the content is output to the outside in the video output step after the storage processing of the 4K content in the storage step; and a copy processing state in which the content is copied to the outside by the copy step after the accumulation processing of the 4K content in the first video output processing state and the second video output processing state, which are output to the outside. , the content protection processing is switched according to the number of pixels of the image of the content to be output, and even in the copy processing state of copying to the outside, the content protection processing is switched according to the number of pixels of the image of the content to be copied. even if the content protection method in the copy processing state is different from the content protection method in the first video output processing state and the content protection method in the second video output processing state, the copy processing switching of content protection processing for the content to be copied in the state, and content for the content to be output in the first video output processing state and the second video output processing state The switching of the protection process equalizes the threshold condition of the number of pixels for switching the content protection process, and in the move processing step, the 4K content stored in the storage step is transferred via the interface. When moving to the outside, the content is protected by DTCP2, and the video output in the video output step is performed via a video output unit having an HDMI terminal.

By using the technology of the present invention, it is possible to provide a broadcast receiving apparatus capable of executing functions with higher added value.

1 is a configuration diagram of a broadcast communication system including a broadcast receiver according to Embodiment 1; FIG. FIG. 4 is an explanatory diagram of components of an encoded signal in MMT; It is a block diagram of MPU in MMT. FIG. 4 is a configuration diagram of an MMTP packet in MMT; 1 is a conceptual diagram of a protocol stack of a broadcasting system using MMT; FIG. 2 is a hierarchical configuration diagram of control information used in a broadcasting system; FIG. It is a list of tables used in TLV-SI of the broadcasting system. It is a list of descriptors used in TLV-SI of the broadcasting system. 1 is a list of messages used in MMT-SI of the broadcasting system; 1 is a list of tables used in MMT-SI for broadcasting systems; 1 is a list (1) of descriptors used in MMT-SI for broadcasting systems; Figure 2 is a list (2) of descriptors used in MMT-SI for broadcasting systems; 3 is a list of descriptors used in MMT-SI for broadcasting systems (3); It is a figure which shows the component of a broadcasting system, and the relationship of each table. It is a figure which shows the data structure of MPT of a broadcasting system. FIG. 2 is a diagram showing the data structure of location information of a broadcasting system; Fig. 2 shows the data structure of the MPU Timestamp Descriptor of the broadcast system; FIG. 3 is a diagram showing the data structure of MH-EIT in the broadcasting system; FIG. 10 is a diagram showing the data structure of an event package descriptor of the broadcasting system; 1 is a block diagram of a broadcast receiving device according to a first embodiment; FIG. 4 is a configuration diagram of a logical plane structure of the presentation function of the broadcast receiving device according to Example 1; FIG. 3 is a software configuration diagram of the broadcast receiving device according to the first embodiment; FIG. 2 is a block diagram of a broadcasting station server according to the first embodiment; FIG. 3 is a block diagram of a service provider server according to the first embodiment; FIG. 1 is a block diagram of a mobile information terminal according to Example 1; FIG. 2 is a software configuration diagram of the portable information terminal according to the first embodiment; FIG. 2 is a system configuration diagram of clock synchronization/presentation synchronization of the broadcast receiver according to the first embodiment; FIG. FIG. 2 is a diagram showing the NTP format data structure of the broadcasting system; FIG. 3 is a diagram showing the data structure of MH-TOT in the broadcasting system; FIG. 10 is a diagram showing the format of the JST_time parameter of the broadcasting system; FIG. 4 is a diagram showing the data structure of time information in the TMCC extension information area of the broadcasting system; FIG. 5 is a diagram showing a method of calculating the current date from the MJD of the broadcast receiving device according to the first embodiment; 4 is an operation sequence diagram during channel scanning of the broadcast receiving apparatus according to the first embodiment; FIG. FIG. 4 is a diagram showing the data structure of TLV-NIT in the broadcasting system; Fig. 2 shows the data structure of the Satellite Distribution System Descriptor of the Broadcast System; Fig. 2 shows the data structure of a service list descriptor of a broadcasting system; FIG. 2 is a diagram showing the data structure of AMT in the broadcasting system; FIG. 4 is an operation sequence diagram of the broadcast receiving apparatus according to the first embodiment when selecting a channel; FIG. 4 is a conceptual diagram illustrating how the PLT of the broadcasting system refers to the MPT of each package; FIG. 4 is a diagram showing the data structure of PLT in the broadcasting system; 1 is an external view of a remote controller capable of controlling the broadcast receiving device according to Embodiment 1; FIG. Fig. 3 shows the data structure of a broadcast system remote control key descriptor; FIG. 10 is a diagram for explaining channel selection processing for a multi-composition channel; FIG. 10 is a diagram for explaining angle selection processing for multi-view compatible programs; FIG. 3 is a diagram showing the data structure of LCT in the broadcasting system; FIG. 4 is a diagram showing the data structure of an MPU presentation area designation descriptor of a broadcasting system; FIG. 11 illustrates the assignment of layouts to layout numbers based on LCT; FIG. 11 illustrates the assignment of layouts to layout numbers based on LCT; FIG. 11 illustrates the assignment of layouts to layout numbers based on LCT; FIG. 11 illustrates the assignment of layouts to layout numbers based on LCT; FIG. 10 is a diagram for explaining exception processing of screen layout control based on LCT; FIG. 10 is a diagram for explaining exception processing of screen layout control based on LCT; Fig. 2 shows the data structure of a video component descriptor of a broadcast system; FIG. 4 is a diagram for explaining the meaning of a video signal aspect ratio of a video component descriptor; FIG. 5 is a diagram for explaining aspect ratio conversion processing of the broadcast receiving apparatus according to the first embodiment; FIG. 5 is a diagram for explaining aspect ratio conversion processing of the broadcast receiving apparatus according to the first embodiment; 4 is a screen display diagram of an EPG screen of the broadcast receiving device according to the first embodiment; FIG. 4 is a screen display diagram of an EPG screen of the broadcast receiving device according to the first embodiment; FIG. 4 is a screen display diagram of an EPG screen of the broadcast receiving device according to the first embodiment; FIG. FIG. 10 is a screen display diagram of the broadcast receiving apparatus according to the first embodiment when an emergency warning broadcast is displayed; FIG. 4 is a diagram showing the data structure of a content copy control descriptor of a broadcasting system; FIG. 4 is a diagram showing the meaning of copy control information in a content copy control descriptor; FIG. 4 is a diagram showing the data structure of a content usage control descriptor of a broadcasting system; FIG. 11 is a block diagram of a broadcast receiving device according to Example 2; FIG. 10 is a diagram for explaining inconsistency of the current time display when switching broadcasting services; FIG. 11 is a diagram illustrating operation of selection control of a current time information reference source according to the second embodiment; FIG. 11 is an operation sequence diagram of current time information update processing according to the second embodiment; FIG. 11 is a screen display diagram of an EPG screen of the broadcast receiving device according to the second embodiment; FIG. 11 is a screen display diagram of an EPG screen of the broadcast receiving device according to the second embodiment; FIG. 11 is a diagram for explaining content protection processing according to the third embodiment; FIG. 12 is a diagram for explaining content protection processing according to the fourth embodiment;

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

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

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

The router device 200r is connected to the Internet 200 by wire communication, is connected to the broadcast receiving device 100 by wire communication or wireless communication, and is connected to the portable information terminal 700 by wireless communication. A method such as Wi-Fi (registered trademark) may be used for the wireless communication. This enables 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 by a method such as BlueTooth (registered trademark) or NFC (Near Field Communication) without going through the router device 200r.

The radio tower 300t is broadcasting equipment of a broadcasting station, and transmits broadcasting waves including encoded data of broadcast programs, caption information, other applications, general-purpose data, and the like. The broadcasting satellite (or communication satellite) 300 s receives the broadcast wave transmitted from the radio tower 300 t of the broadcasting station, performs frequency conversion etc. as appropriate, and then transmits the broadcast to the antenna 100 a connected to the broadcast receiving device 100 . A repeater that retransmits waves. Also, the broadcasting station is assumed to have a broadcasting station server 300 . The broadcasting station server 300 stores broadcast programs (video content, etc.) and metadata such as program titles, program IDs, program summaries, performer information, broadcast dates, etc. of each broadcast program, and stores the video content and each metadata. , based on the contract, it shall be possible to provide to the service provider. The moving image content and each metadata may be provided to the service provider through an API (Application Programming Interface) of 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 in cooperation with broadcast programs distributed from broadcast stations. In addition, the service provider server 400 stores, manages, distributes, and so forth video content and metadata provided by the broadcast station server 300, and various content and applications linked to broadcast programs. In addition, in response to an inquiry from a television receiver or the like, it is assumed to have a function of searching for contents, applications, etc. that can be provided, and providing a list. Note that the storage, management and distribution of the content and metadata and the storage, management and distribution of the application may be performed by different server devices. The broadcasting station and the service provider may be the same or different. A plurality of service provider servers 400 may be prepared for different services. Also, the functions of the service provider server 400 may be provided by the broadcasting station server 300 .

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

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

The portable information terminal 700 is assumed to have a function of telephone communication (phone call) and data transmission/reception via a mobile phone communication network, and a function of wireless communication such as Wi-Fi (registered trademark). 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. It is possible to transmit and receive data through communication with each server device and other communication devices. The access point 200a is connected to the Internet 200 by wire communication, and is connected to the portable information terminal 700 by wireless communication. A method such as Wi-Fi (registered trademark) may be used for the wireless communication. Communication between mobile information terminal 700 and broadcast receiving apparatus 100 is performed via access point 200a, Internet 200, and router apparatus 200r, or via base station 600b, mobile telephone communication server 600, Internet 200, and router apparatus 200r. It may be performed through

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

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 handles a single stream including the clock, it is suitable for transmitting a single content over a single transmission line with a guaranteed transmission quality, and has been adopted in many conventional digital broadcasting systems. On the other hand, MPEG2-TS functions in response to environmental changes related to content distribution, such as the recent diversification of content, the diversification of devices that use content, the diversification of transmission paths for distributing content, and the diversification of content storage environments. MMT is a newly developed media transport scheme due to the limitations of .

FIG. 2A shows an example of an outline of a coded 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. and

The MFU is a format for transmitting video, audio, and the like, and may be configured in NAL (Network Abstraction Layer) unit units or access unit units. The MPU includes one or more access units, and is capable of decoding video and audio by itself. The MPU may consist of MPU metadata containing information about the overall structure of the MPU, movie fragment metadata containing information about the encoded media data, and sample data which is the encoded media data. A plurality of movie fragment data and sample data may exist in one MPU. It is also assumed that the MFU can be extracted from the sample data. FIG. 2B shows an example of the configuration of the MPU. By adding a sequence number to each MPU belonging to the same asset, an arbitrary MPU can be distinguished from other MPUs by the asset ID that identifies the asset and the sequence number of the MPU. In the case of media such as video components and audio components, presentation time and decoding time may be specified for each MPU or each access unit.

An MMTP packet consists of a header portion and an MMTP payload, and shall transmit MFU and MMT control information. The MMTP payload is assumed to have a payload header corresponding to the content (data unit) stored in the payload section. FIG. 2C shows an example of an overview of constructing an MFU from a video/audio signal, storing it in an MMTP payload, and constructing an MMTP packet. Note that in a video signal encoded using inter-frame prediction, it is desirable to configure the MPU in GOP (Group Of Pictures) units. Also, when the size of the MFU to be transmitted is small, one MFU may be stored in one payload section, or multiple MFUs of the same type may be stored in one payload section. Also, when the size of the MFU to be transmitted is large, one MFU may be divided into a plurality of payload parts and stored. Also, 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 line.

In the broadcasting system of this embodiment, MPEG-H HEVC (High Efficiency Video Coding) is used as a video coding method, and MPEG-4 AAC (Advanced Audio Coding) or MPEG-4 ALS (Audio Lossless Video Coding) is used as an audio coding method. Coding) shall be used. Encoded data such as video and audio of a broadcast program encoded by each of the above methods is in the form of MFU or MPU, further put on the MMTP payload to be MMTP packetized, and transmitted by IP (Internet Protocol) packet. and Also, data contents related to broadcast programs may be in the form of MFU or MPU, put on an MMTP payload, converted into MMTP packets, and transmitted in IP packets. Data content transmission methods include (1) closed caption/text superimposition transmission method used for streaming data synchronized with broadcasting, (2) application transmission method used for data transmission services asynchronous to broadcasting, and (3) transmission from broadcasting stations. Four types are available: an event message transmission method used for synchronous/asynchronous message notification for applications running on a television receiver, and (4) a general-purpose data transmission method for transmitting other general-purpose data synchronously/asynchronously. shall be

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

In the broadcasting system of this embodiment, a mechanism for transmitting two types of control information, MMT-SI (MMT-Signaling Information) and TLV-SI (TLV-Signaling Information), is prepared. MMT-SI is control information indicating the structure of a broadcast program. It is assumed to be in the form of an MMT control message, put on an MMTP payload, form an MMTP packet, and be transmitted as an IP packet. TLV-SI is control information related to 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 in order to provide absolute time. 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 enable terminal devices to synchronously display components transmitted from different transmission points through different transmission paths. It is assumed that NTP (Network Time Protocol) format IP packets are used to provide UTC.

[Control information for broadcasting system using MMT]
In the broadcasting system to which the broadcast receiving apparatus 100 of this embodiment corresponds, as described above, the control information includes TLV-SI related to the TLV multiplexing method for multiplexing IP packets and MMT, which is the media transport method. Prepare the relevant MMT-SI. The TLV-SI provides information for the broadcast receiving apparatus 100 to demultiplex the IP packets multiplexed on the broadcast transmission path. TLV-SI consists of a "table" and a "descriptor". The "table" shall be transmitted in the form of sections, and the "descriptor" shall be placed within the "table". MMT-SI is transmission control information indicating information related to the configuration of MMT packages and 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 to which the broadcast receiving apparatus 100 of this embodiment is compatible. In this embodiment, the following table is used as the TLV-SI "table".

(1) TLV-NIT
The Network Information Table for TLV (TLV-NIT) represents information about the physical structure 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 carried in the network.

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

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

(1) Service List Descriptor The service list descriptor provides a list of services by service identifier 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 The network name descriptor describes the network name using character codes.

(5) Remote Control Key Descriptor The remote control key descriptor is used to set the service assigned to the one-touch channel selection button of the remote controller for the receiver.

(6) Descriptors set by service providers In addition, descriptors set independently by service providers can be prepared.

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

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

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

(3) CA message The CA message is used to transmit a table for identifying the 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) Messages set by service providers In addition, it is possible to prepare messages set independently by service providers.

<Tables used in MMT-SI>
FIG. 6B shows a list of "tables" used in MMT-SI of the broadcasting system to which the broadcast receiving apparatus 100 of this embodiment is compatible. The table is control information having elements and attributes indicating specific information, and is stored in a message and transmitted by an MMTP packet. Note that the message that stores the table may be determined according to the table. In this embodiment, the following MMT-SI "table" is used.

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

(2) PLTs
The Package List Table (PLT) shows a list of IP data flows and packet IDs that transmit PA messages of MMT packages provided as broadcast services, and IP data flows that transmit IP services. PLT can be stored in the PA message.

(3) LCT
A layout configuration table (LCT) is used to associate layout information for presentation with a layout number. The LCT can 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 can be stored in the M2 section message.

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

(6) CAT (MH)
A CA table (Conditional Access Table: CAT) (MH) is used to store descriptors for identifying conditional access systems. CAT(MH) can be stored in the CA message.

(7) DCM
A Download Control Message (DCM) transmits key-related information such as a key for decrypting transmission path encryption for download. DCMs can be stored in M2 section messages.

(8) DMM
A Download Management Message (DMM) transmits key-related information such as a download key for decrypting the DCM. DMMs can be stored in M2 section messages.

(9) MH-EIT
The MH-Event Information Table (MH-EIT) is chronological information on events included in each service. MH-EIT can be stored in the M2 section message.

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

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

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

(13) MH-SDT
The MH-Service Description Table (MH-SDT) has sub-tables representing services included in a particular TLV stream, and contains information about organized channels such as the name of the organized channel and the name of the broadcaster. to transmit. MH-SDT can be stored in the M2 section message.

(14) MH-TOT
The MH-Time Offset Table (MH-TOT) carries JST time and date (Modified Julian Day) information. MH-TOT can 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 non-volatile memory in section format to all receivers that receive it. MH-CDT can be stored in the M2 section message.

(16) DDM Table A Data Directory Management Table (DDM table) provides a directory structure of files that constitute an application in order to separate the file structure of the application and the structure for file transmission. DDM tables can be stored in data transmission messages.

(17) DAM Table A Data Asset Management Table (DAM table) provides configuration of MPUs in an asset and version information for each MPU. DAM tables can be stored in data transfer messages.

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

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

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

<Descriptor used in MMT-SI>
6C, 6D and 6E show a list of "descriptors" arranged in the MMT-SI of the broadcasting system to which the broadcast receiving apparatus 100 of this embodiment is compatible. A descriptor is control information that provides more detailed information and shall be placed in a table. Note that the table in which descriptors are arranged may be determined according to the descriptors. In this embodiment, the following are used as the "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 can be placed in the MPT.

(2) Event Package Descriptor The event package descriptor provides correspondence between events representing programs and packages. The event package descriptor can be placed in the MH-EIT carried 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 location where the MPU is presented. MPU presentation area specification descriptors may be placed in the MPT.

(5) MPU Timestamp Descriptor The MPU Timestamp Descriptor indicates the presentation time of the first access unit in presentation order in the MPU. The MPU Timestamp Descriptor can be placed in the MPT.

(6) Dependency Descriptor The Dependency Descriptor provides the Asset ID of the dependent Asset. Dependency descriptors can be placed in the MPT.

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

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

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

(10) Emergency Information Descriptor (MH)
An emergency information descriptor (MH) is used when an emergency warning is broadcast. 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 audio stream of ISO/IEC 14496-3 (MPEG-4 audio). used for MH-MPEG-4 audio descriptors can be placed in the MPT.

(12) MH-MPEG-4 Audio Extension Descriptor The MH-MPEG-4 Audio Extension Descriptor is used to describe MPEG-4 audio stream profiles, levels, and coding system-specific settings. MH-MPEG-4 audio extension descriptors can be placed in the MPT.

(13) MH-HEVC Video Descriptor The MH-HEVC video descriptor conforms to ITU-T Recommendation H.264. H.265|Used to describe the basic encoding parameters of a video stream (HEVC stream) of ISO/IEC 23008-2. MH-HEVC video descriptors can be placed in the MPT.

(14) MH-Link Descriptor The MH-Link descriptor identifies the service to be provided when the viewer requests additional information related to a particular thing listed in the service information system. MH-Link descriptors may be located in MPT, MH-EIT, MH-SDT, and so on.

(15) MH-Event Group Descriptor MH-Event Group Descriptor is used to indicate that events are grouped when there is a relationship between multiple events. The MH-Event Group Descriptor may be placed in the MH-EIT.

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

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

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

(19) Video Component Descriptor The video component descriptor indicates parameters and descriptions related to the video component, and is also used to represent the elementary stream in character format. Video component descriptors may be placed in the MPT or MH-EIT.

(20) MH-Stream Identifier Descriptor MH-Stream Identifier Descriptor is used to label component streams of a service and to refer to the description content indicated by the video component descriptor in MH-EIT by this label. . An MH-stream identifier descriptor can be placed in the MPT.

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

(22) MH-Parental Rate Descriptor The MH-Parental Rate Descriptor is used to represent age-based viewing restrictions and to extend based on 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. MH-Audio Component Descriptor may be located in MPT or MH-EIT.

(24) MH-Target Area Descriptor The MH-Target Area Descriptor is used to describe the target area of a program or some streams that constitute a program. The MH-Target Area Descriptor can be placed in the MPT.

(25) MH-series descriptor The MH-series descriptor is used to identify series programs. MH-series descriptors 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 can 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 expresses the program channel name and its carrier name together with the service format type in character code. The MH-Service Descriptor can be placed in the MH-SDT.

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

(30) MH-CA activation descriptor The MH-CA activation descriptor describes activation information for activating the CAS program on the CAS infrastructure. 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 by the application transmission method. MH-Type descriptors can be placed in a DAM table.

(32) MH-Info descriptor MH-Info descriptor describes information about MPU or item. MH-Info descriptors can be placed in a DAM table.

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

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

(35) MH-Data Encoding Descriptor MH-Data Encoding Descriptor is used to identify the data encoding. The MH-Data Coding Descriptor can 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. The UTC-NPT reference descriptor can be placed in the EMT.

(37) Event message descriptor The event message descriptor conveys information about event messages in general. Event message descriptors can be placed in the EMT.

(38) MH-Local Time Offset Descriptor The MH-Local Time Offset Descriptor is used to give a certain offset value between the actual time (eg, UTC+9 hours) and the display time for the human system when daylight saving time is implemented. The MH-Local Time Offset Descriptor can be placed in the MH-TOT.

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

(40) MH-Logo Transmission Descriptor The MH-Logo Transmission Descriptor is used to describe simple logo character strings, pointing to logos in CDT format, and the like. The MH-Logo Transmission Descriptor can be placed in the MH-SDT.

(41) MPU Extended Timestamp Descriptor The MPU Extended Timestamp Descriptor provides the decoding time of the access unit within the MPU. The MPU Extended Timestamp Descriptor can be placed in the MPT.

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

(43) MH-Network Download Contents Descriptor The MH-Network Downloads Contents Descriptor is used to describe the attribute information of the content downloaded using the network. The MH-Network Download Content Descriptor can be placed in the MH-SDTT.

(44) MH-Application Descriptor MH-Application Descriptor describes application information. The MH-Application Descriptor can be placed in the MH-AIT.

(45) MH-Transmission Protocol Descriptor The MH-transmission protocol descriptor is used to designate transmission protocols such as broadcasting and communication and to indicate location information of applications dependent on the transmission protocols. The MH-Transport Protocol Descriptor can be placed in the MH-AIT.

(46) MH-Simple Application Location Descriptor MH-Simple Application Location Descriptor is written to indicate the details of the acquisition source of the 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 used to set the application boundary and set the broadcasting resource access authority for each area (URL). The MH-Application Boundary Authorization Descriptor can be placed in the MH-AIT.

(48) MH-Activation Priority Information Descriptor MH-Activation Priority Information Descriptor is written to specify the activation priority of an application. The MH-Activation Priority Information Descriptor may be placed in the MH-AIT.

(49) MH-Cache Information Descriptor MH-Cache Information Descriptor is used for cache control when resources that make up an application are cached and held when reuse of the application is assumed. . The MH-Cache Information Descriptor can be placed in the MH-AIT.

(50) MH-Probabilistic Application Delay Descriptor MH-Probabilistic Application Delay Descriptor delays the timing of application control by a stochastically set delay amount, assuming load distribution of server access for application acquisition. described in The MH-Probabilistic Adaptation Delay Descriptor can be placed in the MH-AIT.

(51) Link Destination PU Descriptor The link destination PU descriptor describes other presentation units that may transition from the presentation unit (PU). Linked-to PU descriptors may be placed in the DCC table.

(52) Lock Cache Specification Descriptor The lock cache specification descriptor describes the specification of a file to be cached and locked in the presentation unit. Lock cache specification descriptors can be placed in the DCC table.

(53) Unlock Cache Specification Descriptor The unlock cache specification descriptor describes the specification of files to be unlocked among files locked in the presentation unit. Unlocked cache specification descriptors can be placed in the DCC table.

(54) MH-Download Protection Descriptor MH-Download Protection Descriptor describes location information and transmission information of MMTP packets that transmit DCM or DMM. The MH-Download Protection Descriptor may be placed in the MPT or MH-SDTT.

(55) Application Service Descriptor The application service descriptor describes the entry information of the application related to the service. Application service descriptors can be placed in the MPT.

(56) MPU node descriptor The MPU node descriptor indicates that the MPU corresponds to the directory node specified in the data directory management table. MPU node descriptors can be placed in a DAM table.

(57) PU Configuration Descriptor The PU configuration descriptor indicates a list of MPUs that compose a presentation unit as mapping information between the presentation unit and transmission units. PU configuration descriptors can be placed in the DCC table.

(58) MH-Hierarchical Encoding Descriptor The MH-Hierarchical Encoding Descriptor describes information for identifying a hierarchically encoded video stream component. MH-layer coding descriptors can be placed in the MPT.

(59) Content Copy Control Descriptor The content copy control descriptor indicates information for controlling the copy generation in the digital recording equipment for the entire service, and when it is assumed that digital recording will be performed, the broadcasting station (copyright is used to convey information about copying or the maximum transmission rate to the digital recording equipment. Content copy control descriptors may be located in MPT, MH-EIT, MH-SDT, and so on.

(60) Content Usage Control Descriptor The content usage control descriptor indicates information related to copy control and remote viewing control when programs are stored on a hard disk or the like or when video/audio signals are output from a receiver. used for Content usage control descriptors may be located in MPT, MH-EIT, MH-SDT, and so on.

(61) Descriptors set by service providers In addition, it is possible to prepare descriptors set independently by service providers.

<Relationship between data transmission and each control information in the MMT method>
Here, with reference to FIG. 7A, the relationship between each component such as video and audio transmitted by the broadcasting system to which the broadcast receiving apparatus 100 of the present embodiment is compatible and a representative table of MMT-SI will be described. In addition, in the MMT method, a component is defined as an asset, and hereinafter, the component may be referred to as an asset.

In the broadcasting system to which the broadcast receiving apparatus 100 of this embodiment is compatible, data transmission can be performed through a plurality of paths such as TLV streams via broadcast transmission paths and IP data flows via communication lines. The TLV stream includes TLV-SI such as TLV-NIT and AMT, and IP data flow, which is a data flow of IP packets. 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 caption asset including a series of caption MPUs, a text super asset including a series of text super MPUs, a data asset including a series of data MPUs, and so on.

These various assets are associated with "packages" by descriptions in MPT (MMT Package Table) that are stored and transmitted in PA messages. Specifically, the association may be performed by describing in the MPT a package ID that identifies a package and an asset ID that identifies each asset included in the package. FIG. 7B shows an example of the data structure of MPT. The "MMT_package_id_byte" parameter in the drawing corresponds to the package ID, and the "asset_id_byte" parameter corresponds to the asset ID.

The assets that make up the package can be only the assets in the TLV stream, but they can also include the assets that are transmitted in the IP data flow of the communication line, as shown in FIG. 7A. This is done by describing the location information of the asset together with the asset ID that identifies each asset included in the package in the MPT so that the broadcast receiving apparatus 100 of the present embodiment can grasp the reference destination of each asset. realizable. The location information is designated by 'MMT_general_location_info( )' in the MPT data structure shown in FIG. 7B. FIG. 7C shows an example of the data structure of location information.

According to the value of the "location_type" parameter of 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 in IP data flow (location_type=0x04)
(6) Data at the specified URL (location_type=0x05)
For example, various data transmitted through various transmission paths can be configured so that the broadcast receiving apparatus 100 can refer to them.

Of the above references, (1) is, for example, the IP data flow included in the TLV stream of the digital broadcast signal received by the broadcast receiver 100 of this embodiment via the antenna 100a. However, when the MPT is transmitted by including it in the IP data flow on the communication line side, the reference destination of (1) may be the IP data flow received via the communication line. Also, the above (2), (3), (5), and (6) are IP data flows received by the broadcast receiver 100 of this embodiment via the communication line. In addition, the above (4) includes, for example, a receiving function of receiving a digital broadcasting signal using the MMT method and a receiving function of receiving a digital broadcasting signal using the MPEG2-TS method, like the broadcast receiving apparatus 800 of the second embodiment described later. In the case of a broadcast receiving device having both reception functions, based on the location information of the MPT included in the digital broadcast signal using the MMT method, MPEG2- which receives the digital broadcasting signal using the MPEG2-TS method with the receiving function. It can be used when referring to data multiplexed in TS.

In media such as video components and audio components, presentation time and decoding time can be designated for each MPU or each access unit. Information about the presentation time and decoding time is described in the MPT as an MPU time stamp descriptor or an MPU extended time stamp descriptor. FIG. 7D shows an example of the data structure of the MPU Timestamp Descriptor describing information about the presentation time. The presentation time information of each MPU is specified by the 'mpu_presentation_time' parameter of the MPU timestamp descriptor. Also, the MPU to be specified can be identified by the "mpu_sequence_number" parameter. In the broadcast receiving apparatus 100 of the present embodiment, using the presentation time information, a plurality of MPUs specified by the MPT are presented (displayed, output etc.). Also, the information about the decoding time is similarly described by the MPU Extended Time Stamp Descriptor, but the detailed explanation is omitted. The presentation control of various data using the NTP-based clock will be described later.

In the broadcasting system of this embodiment, the series of data in units of "packages" corresponds to "services" of digital broadcasting. Also, the "service" is a series of "programs" transmitted according to a schedule. The "program" is handled as an "event" in the MMT system. Each event is specified by the MH-EIT in terms of start time and duration. Also, the ID of the MMT package to which each event corresponds is specified by the event package descriptor placed in the MH-EIT. FIG. 7E shows an example of the data structure of MH-EIT. The start time is designated by the "start_time" parameter in the drawing, and the duration is designated by the "duration" parameter. FIG. 7F shows an example data structure of an event package descriptor. The "MMT_package_id_byte" parameter of the event package descriptor placed in the MH-EIT makes it possible to specify the correspondence between each event and the MMT package. MH-EIT performs various types of processing (for example, processing for generating an electronic program guide, control of recording reservations and viewing reservations, copyright management processing such as temporary storage, etc.) in units of "events" in the broadcast receiving apparatus 100 of this embodiment. ), etc.

[Hardware Configuration of Broadcast Receiver]
FIG. 8A is a block diagram showing an example of the internal configuration of broadcast receiving apparatus 100. As shown in FIG. Broadcast receiver 100 includes main control unit 101, system bus 102, ROM 103, RAM 104, storage unit 110, LAN communication unit 121, expansion interface unit 124, digital interface unit 125, tuner/demodulation unit 131, separation unit 132. , video decoder 141, video color gamut conversion unit 142, audio decoder 143, text super decoder 144, subtitle decoder 145, subtitle synthesizing unit 146, subtitle color gamut conversion unit 147, data decoder 151, cache unit 152, application control unit 153, Consists of a browser unit 154, an application color gamut conversion unit 155, a sound source unit 156, a video synthesis unit 161, a monitor unit 162, a video output unit 163, an audio synthesis unit 164, a speaker unit 165, an audio output unit 166, and an operation input unit 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. A system bus 102 is a data communication path for transmitting and receiving data between the main control unit 101 and each operation block in the broadcast receiving apparatus 100 .

A ROM (Read Only Memory) 103 is a non-volatile memory that stores a basic operation program such as an operating system and other operation 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 for executing the basic operating program and other operating programs. The ROM 103 and the RAM 104 may be configured integrally with the main control section 101 . Also, the ROM 103 may use a partial storage area in the storage (accumulation) section 110 instead of having an independent configuration as shown in FIG. 8A.

The storage (accumulation) unit 110 stores an operation program and operation setting values of the broadcast receiving device 100, personal information of the user of the broadcast receiving device 100, and the like. Further, it is possible to store an operation program downloaded via the Internet 200 and various data created by the operation program. In addition, content such as moving images, still images, and audio obtained from broadcast waves or downloaded via the Internet 200 can also be stored. A partial area of the storage (accumulation) unit 110 may be used to replace all or part of the functions of the ROM 103 . In addition, the storage (accumulation) unit 110 needs to retain stored information even when power is not supplied to the broadcast receiving apparatus 100 from the outside. Therefore, for example, devices such as non-volatile semiconductor element memories such as flash ROMs and SSDs (Solid State Drives) and magnetic disk drives such as HDDs (Hard Disc Drives) are used.

It should be noted that each operation program stored in the ROM 103 and the storage (accumulation) unit 110 can be added, updated, and expanded 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 transmits and receives data to and from each server device on the Internet 200 and other communication devices. It is also assumed that an MMT data string (or part thereof) of a program transmitted via a communication line is acquired. The connection with 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. Also, the broadcast receiving apparatus 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) to a service channel desired by the user under the control of the main controller 101. FIG. Furthermore, the tuner/demodulator 131 demodulates the received broadcast signal to obtain an MMT data string. Although the example shown in FIG. 8A exemplifies a configuration in which there is one tuner/demodulator, the broadcast receiver 100 may include a tuner/demodulator for the purpose of simultaneous display of multiple screens, recording of counterprograms, and the like. It is good also as a structure which mounts more than one.

The separation unit 132 is an MMT decoder, and separates real-time presentation elements such as a video data string, an audio data string, a text superimposition data string, a caption data string, and the like based on the control signal in the input MMT data string into the video decoder 141. , audio decoder 143, text decoder 144, caption decoder 145, and the like. The data input to the separation unit 132 is an MMT data string transmitted via a broadcast transmission line and demodulated by the tuner/demodulation unit 131, or MMT data transmitted via a communication line and received by the LAN communication unit 121. It can be a row. Also, the separation unit 132 reproduces the multimedia application and file-based data that are its constituent elements, and temporarily stores them in the cache unit 152 . The separating unit 132 also extracts general-purpose data and outputs it to the data decoder 151 in order to use it for streaming data for applications or data used by a player that presents data other than audiovisual subtitles. Further, the separation unit 132 may perform error correction, access restriction control, etc. for the input MMT data string under 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 by the video synthesis unit 161 . The audio decoder 143 decodes the audio data string input from the separator 132 and outputs audio information. In addition, even if streaming data such as MPEG-DASH (MPEG-Dynamic Adaptive Streaming over HTTP) format or the like obtained from the Internet 200 via the LAN communication unit 121 is input to the video decoder 141 and the audio decoder 143, good. Also, the video decoder 141, the video color gamut conversion unit 142, the audio decoder 143, etc. may be provided in plurality in order to simultaneously decode multiple types of video data strings and audio data strings.

The superimposed text decoder 144 decodes the superimposed data string input from the separator 132 and outputs superimposed text information. The caption decoder 145 decodes the caption data string input from the separation unit 132 and outputs caption information. The superimposed text information output from the superimposed text decoder 144 and the subtitle information output from the subtitle decoder 145 are subjected to a synthesizing process in the subtitle synthesizing unit 146. For image synthesis processing, color space conversion processing is applied as necessary. In this embodiment, of the services centered on character information presented simultaneously with 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, when they are not distinguished, they are collectively referred to as subtitles.

The browser unit 154 retrieves multimedia application files and file-based data, which are components thereof, obtained from a server device on the Internet 200 via the cache unit 152 or the LAN communication unit 121 as control information contained in the MMT data string and LAN The information is presented according to instructions from the application control unit 153 that interprets the control information acquired from the server device on the Internet 200 via the communication unit 121 . The multimedia application file may be an HTML (Hyper Text Markup Language) document, a BML (Broadcast Markup Language) document, or the like. The application information output from the browser unit 154 is further subjected to color space conversion processing in the application color gamut conversion unit 155 for image composition processing in the image composition unit 161 as necessary. The browser unit 154 also reproduces application audio information by working on the sound source unit 156 .

The video composition unit 161 receives the video information output from the video color gamut conversion unit 142, the caption information output from the subtitle color gamut conversion unit 147, the application information output from the application color gamut conversion unit 155, and the like. Processing such as selection and/or superimposition is performed. The video synthesizing unit 161 includes a video RAM (not shown), and the monitor unit 162 and the like are driven based on the video information and the like input to the video RAM. In addition, the video synthesizing unit 161, under the control of the main control unit 101, if necessary, an EPG (Electronic Program Guide: (Electronic program guide) Superimpose processing of screen information, etc. The monitor unit 162 is, for example, a display device such as a liquid crystal panel, and provides the user of the broadcast receiving apparatus 100 with video information selected and/or superimposed by the video synthesizing unit 161 . The video output unit 163 is a video output interface that outputs the video information selected and/or superimposed by the video synthesizing unit 161 .

It should be noted 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. 8B shows an example of the configuration of the logical plane structure provided by the presentation function of the broadcast receiving apparatus 100 of this embodiment. In the logical plane structure, a superimposed text plane for displaying superimposed text is arranged in the foreground, and a subtitle plane for displaying subtitles is arranged in the next layer. A multimedia plane for displaying broadcast video, multimedia applications, or composite video thereof is placed on the third layer, and a background plane is placed on the backmost layer. In the subtitle synthesizing unit 146 and the video synthesizing unit 161, drawing of superimposed text information on the superimposed text plane, drawing of subtitle information on the subtitle plane, and drawing of video information, application information, etc. on the multimedia plane are performed. Also, the background color is drawn on the background plane based on the LCT and the like included in the MMT-SI. It is assumed that a plurality of multimedia planes in the third layer can be prepared according to the number of video decoders 141 . However, even if there are a plurality of multimedia planes, the application information and the like output from the application color gamut conversion unit 155 are output only to the frontmost multimedia plane.

The audio synthesizing unit 164 receives 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. Speaker unit 165 provides the user of broadcast receiving apparatus 100 with the audio information selected and/or mixed by audio synthesizing unit 164 . The audio output unit 166 is an audio output interface that outputs audio information selected and/or mixed by the audio synthesis unit 164 .

The extension interface unit 124 is a group of interfaces for extending the functions of the broadcast receiving apparatus 100, and in this embodiment, it is assumed to be composed of an analog video/audio interface, a USB (Universal Serial Bus) interface, a memory interface, and the like. do. The analog video/audio interface inputs analog video/audio signals from an external video/audio output device, outputs analog video/audio signals to an external video/audio input device, and the like. The USB interface is connected to a PC or the like to transmit and receive data. Broadcast programs and contents may be recorded by connecting an HDD. Also, a keyboard or other USB devices may be connected. A memory interface connects a memory card or other memory medium to transmit 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 unit 125 can directly output the MMT data string obtained by demodulation by the tuner/demodulator 131, the MMT data string acquired via the LAN communication unit 121, or the mixed data of each MMT data string. shall be Also, control may be performed so that the MMT data string input from the digital interface unit 125 is input to the separation unit 132 . Output of digital content stored in the storage (accumulation) unit 110 or storage of digital content in the storage (accumulation) unit 110 may be performed via the digital interface unit 125 .

The digital interface unit 125 is a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, or the like, and outputs or inputs data in a format conforming to the DVI specification, the HDMI specification, the Display Port specification, or the like. It can be anything. It 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 hardware configuration.

The operation input unit 170 is an instruction input unit for inputting an operation instruction to the broadcast receiving apparatus 100. In this embodiment, a remote control receiving unit for receiving commands transmitted from a remote controller (not shown) and a button switch are arranged. It shall consist of operation keys. Only one of them may be used. Further, the operation input unit 170 may be replaced by a touch panel arranged over the monitor unit 162 . A keyboard or the like connected to the expansion interface section 124 may be substituted. The remote control not shown may be replaced by the portable information terminal 700 having a remote control command transmission 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 the television receiver, the broadcast receiving apparatus 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, a STB (Set Top Box), or the like. It may be a PC (Personal Computer), a tablet terminal, a navigation device, a game machine, or the like, which has a digital broadcasting reception function and a broadcast communication cooperation function. If broadcast receiving apparatus 100 is a DVD recorder, HDD recorder, STB, or the like, monitor section 162 and speaker section 165 may not be provided. By connecting an external monitor and an external speaker to the video output unit 163 and the audio output unit 166 or the digital interface unit 125, the same operation as the broadcast receiving apparatus 100 of this embodiment can be performed.

[Software Configuration of Broadcast Receiver]
FIG. 8C is a software configuration diagram of the broadcast receiving apparatus 100 of the present embodiment, showing the software configuration in the ROM 103, RAM 104 and storage (accumulation) section 110. As shown in FIG. In this embodiment, the ROM 103 stores a basic operating program 1001 and other operating programs, and the storage unit 110 stores a receiving function program 1002, a linking function program 1003, a recording/playback function program 1004, and other operating programs. program is stored. The storage (accumulation) unit 110 also includes a content storage area 1200 for storing content such as moving images, still images, and audio, and an authentication area for storing authentication information required when accessing external portable terminal devices and each server device. It is assumed that an information storage area 1300 and various information storage areas for storing other various information are provided.

A basic operation program 1001 stored in the ROM 103 is developed in the RAM 104, and the main control unit 101 executes the expanded basic operation program 1001 to configure a basic operation execution unit 1101. FIG. Similarly, the reception function program 1002, the cooperation function program 1003, and the recording/playback function program 1004 stored in the storage (accumulation) unit 110 are expanded in the RAM 104. By executing the link function program 1003 and the recording/playback function program 1004, the reception function execution unit 1102, the link function execution unit 1103, and the recording/playback function execution unit 1104 are configured. The RAM 104 is also assumed to have a temporary storage area for temporarily holding data created during execution of each operating program as needed.

In the following description, for the sake of simplicity, the basic operation program 1001 stored in the ROM 103 is loaded into the RAM 104 and executed by the main control unit 101 to control each operation block. It is assumed that the unit 1101 controls each operation block. Similar descriptions are made for other operating programs.

The receiving function executing unit 1102 controls each operation 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 unit 1102a mainly controls the MMT decoder function of the separating unit 132, and distributes the video data string, the audio data string, etc. separated from the MMT data string to the corresponding decoding processing units. The AV decoding processing unit 1102b mainly controls the video decoder 141, the audio decoder 143, and the like. The application processing unit 1102 c mainly controls the cache unit 152 , the application control unit 153 , the browser unit 154 and the sound source unit 156 . The superimposed text processing unit 1102d mainly controls the superimposed text decoder 144. FIG. The caption processing unit 1102 e mainly controls the caption decoder 145 . The general-purpose data processing unit 1102f mainly controls the data decoder 151. FIG. The EPG generation unit 1102g interprets the description contents such as MH-EIT included in the MMT-SI and generates an EPG screen. The presentation processing unit 1102h converts the video color gamut conversion unit 142, the subtitle synthesis unit 146, the subtitle color conversion unit 147, the application color conversion unit 155, the video synthesis unit 161, and the audio synthesis unit 164 based on the logical plane structure. is primarily controlled.

Further, the cooperation function execution unit 1103 manages device authentication, connection, transmission and reception of each data, etc. when the broadcast receiving device 100 performs cooperative operation with an external device such as the mobile information terminal 700 . The recording/playback function executing unit 1104 stores broadcast programs obtained from the digital broadcast waves of the present broadcasting system, content obtained from each server device on the network, and the like in the content storage area 1200 of the storage (accumulation) unit 110 and the expansion interface unit 124. It performs control when recording to an external storage or the like connected to the , or when reproducing the broadcast program or content.

Each of the operation programs may be stored in the ROM 103 and/or the storage (accumulation) unit 110 in advance at the time of product shipment. It may be acquired from other application servers 500 or the like on the Internet 200 via the LAN communication unit 121 after product shipment. Further, each operation program stored in a memory card, an optical disc, or the like may be obtained through the expansion interface section 124 or the like.

[Broadcast station server configuration]
FIG. 9 is a block diagram showing an example of the internal configuration of the broadcasting station server 300. As shown in FIG. The broadcasting station server 300 is composed of 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 operation program. A system bus 302 is a data communication path for transmitting and receiving data between the main control unit 301 and each operation block in the broadcasting station server 300 . A RAM 304 serves as a work area when each operation program is executed.

Storage unit 310 stores basic operation program 3001 , broadcast content management/distribution program 3002 and broadcast content transmission program 3003 , and further comprises broadcast content storage area 3200 and metadata storage area 3300 . A broadcast content storage area 3200 stores program content of each broadcast program broadcast by a broadcasting station. The metadata storage area 3300 stores metadata such as program titles, program IDs, program outlines, performers, broadcast dates and times, and copy control information related to each program content of each broadcast program.

Also, 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 expanded in the RAM 304, and the main control unit 301 executes the expanded programs. Thus, a basic operation execution unit 3101, a broadcast content management/distribution execution unit 3102, and a broadcast content transmission execution unit 3103 are configured.

In the following description, for the sake of simplicity, the basic operation program 3001 stored in the storage unit 310 is loaded into the RAM 304 and executed by the main control unit 301 to control each operation block. It is assumed that the action execution unit 3101 controls each action block. Similar descriptions are made for other operating programs.

Broadcast content management/distribution executing unit 3102 manages the program content and the like of each broadcast program stored in the broadcast content storage area 3200 and the metadata storage area 3300 and each metadata, and manages the program content and the like of each broadcast program and each metadata. It controls when metadata is provided to service providers based on contracts. Further, the broadcast content management/distribution execution unit 3102, when providing the program content and the like of each broadcast program and each metadata to the service business operator, may, if necessary, provide the service business operator based on the contract. Authentication processing of the server 400 or the like may be performed.

Broadcast content transmission execution unit 3103 receives program content of broadcast programs stored in broadcast content storage area 3200, program titles, program IDs, and program content copy control information of broadcast programs stored in metadata storage area 3300. Time schedule management and the like are performed when the MMT data string including the data is transmitted from the radio tower 300t via the digital broadcast signal transmission unit 360. FIG.

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 unit 321 includes an encoding circuit, a decoding circuit, and the like. The digital broadcast signal transmission unit 360 modulates an MMT data string composed of a video data string, an audio data string, a program information data string, etc. such as program content of each broadcast program stored in the broadcast content storage area 3200, and modulates the , and the radio tower 300t as digital broadcast waves.

[Configuration of service provider server]
FIG. 10 is a block diagram showing an example of the internal configuration of the service provider server 400. As shown in FIG. The service provider server 400 is composed of a main control unit 401, a system bus 402, a RAM 404, a storage unit 410, and a LAN communication unit 421.

The main control unit 401 is a microprocessor unit that controls the entire service provider server 400 according to a predetermined operating program. A system bus 402 is a data communication path for transmitting and receiving data between the main control unit 401 and each operation block in the service provider server 400 . A RAM 404 serves as a work area when each operation 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 furthermore, a video content storage area 4200, a metadata storage area 4300, an application storage area 4400, and user information storage. A region 4500 is provided. The video content storage area 4200 stores program content of broadcast programs provided from the broadcasting station server 300 as video content. In addition, it stores video content and the like produced by the service provider. The metadata storage area 4300 stores metadata provided by 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 realizing 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.) on users who are permitted to access the service provider server 400 .

Further, the basic operation program 4001, the video content management/distribution program 4002, and the application management/distribution program 4004 stored in the storage unit 410 are developed in the RAM 404, and the main control unit 401 executes the expanded basic operation program and the image. 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 description, for the sake of simplicity, the basic operation program 4001 stored in the storage unit 410 is loaded into the RAM 404 and executed by the main control unit 401 to control each operation block. It is assumed that the action execution unit 4101 controls each action block. Similar descriptions are made for other operating programs.

Video content management/distribution execution unit 4102 acquires program content and the like of broadcast programs and metadata from broadcasting station server 300, and manages video content and the like accumulated in video content storage area 4200 and metadata storage area 4300 and each metadata. and control distribution of the video content and each metadata to each television receiver. Furthermore, the video content management/distribution execution unit 4102 performs authentication processing of each television receiver as necessary when distributing each video content and each metadata to each television receiver. you can go Also, the application management/distribution executing unit 4104 manages each application stored in the application storage area 4400 and controls when each application is distributed in response to a request from each television receiver. Furthermore, the application management/distribution executing unit 4104 may perform authentication processing of each television receiver, etc., as necessary when distributing each application to each television receiver.

The LAN communication unit 421 is connected to the Internet 200 and communicates with the broadcasting 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 unit 421 includes an encoding circuit, a decoding circuit, and the like.

[Hardware configuration of portable information terminal]
FIG. 11A is a block diagram showing an example of the internal configuration of portable information terminal 700. As shown in FIG. The portable information terminal 700 includes a main control unit 701, a system bus 702, a ROM 703, a RAM 704, a storage unit 710, a communication processing unit 720, an extended interface unit 724, an operation unit 730, an image processing unit 740, an audio processing unit 750, and a sensor unit 760. , consists of

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

A ROM 703 is a memory storing a basic operation program such as an operating system and other operation programs, and a rewritable ROM such as an EEPROM or a flash ROM is used. A RAM 704 serves as a work area for executing the basic operation program and other operation programs. The ROM 703 and RAM 704 may be configured integrally with the main control section 701 . Also, the ROM 703 may use a partial storage area in the storage section 710 instead of having an independent configuration as shown in FIG. 11A.

The storage unit 710 stores an operation program and operation setting values of the mobile information terminal 700, personal information of the user of the mobile information terminal 700, and the like. Further, it is possible to store an operation program downloaded via the Internet 200 and various data created by the operation program. In addition, content such as moving images, still images, and sounds downloaded via the Internet 200 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 . Moreover, 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.

It should be noted that each operation program stored in the ROM 703 and storage unit 710 can be added, updated, and expanded in function by downloading from each server device on the Internet 200 .

The communication processing unit 720 is composed of a LAN communication unit 721 , a mobile telephone network communication unit 722 and an NFC communication unit 723 . The LAN communication unit 721 is connected to the Internet 200 via the router device 200r and the access point 200a, and transmits and receives data to and from each server device on the Internet 200 and other communication devices. It is assumed that the connection with the router device 200r and the access point 200a is performed by wireless connection such as Wi-Fi (registered trademark). The mobile phone network communication unit 722 performs telephone communication (phone call) and data transmission/reception through wireless communication with the base station 600b of the mobile phone network. The NFC communication unit 723 performs wireless communication with a corresponding reader/writer when in close proximity. The LAN communication unit 721, the mobile phone network communication unit 722, and the NFC communication unit 723 are each provided with an encoding circuit, a decoding circuit, an antenna, and the like. Also, 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 extended interface unit 724 is a group of interfaces for extending 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/audio signals from an external video/audio output device, outputs video/audio signals to an external video/audio input device, and the like. The USB interface is connected to a PC or the like to transmit and receive data. Also, a keyboard or other USB devices may be connected. A memory interface connects a memory card or other memory medium to transmit and receive data.

The operation unit 730 is an instruction input unit for inputting an operation instruction to the mobile information terminal 700, and in this embodiment, it is composed of a touch panel 730t arranged over the display unit 741 and operation keys 730k arranged with button switches. shall be Only one of them may be used. The portable information terminal 700 may be operated using a keyboard or the like connected to the extended 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 mobile information terminal 700 may be operated from the broadcast receiving device 100 . Also, the touch panel function may be provided by the display unit 741 .

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

The audio processing unit 750 is composed of an audio output unit 751 , an audio signal processing unit 752 and an audio input unit 753 . The audio output unit 751 is a speaker, and provides the user of the portable information terminal 700 with the audio signal processed by the audio signal processing unit 752 . A voice input unit 753 is a microphone that converts a user's voice or the like 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 includes a GPS receiver 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 sensors make it possible to detect the position, tilt, direction, movement of the mobile information terminal 700, the brightness of the surroundings, the proximity of surrounding objects, and the like. Moreover, the mobile information terminal 700 may further include other sensors such as an air pressure sensor.

The mobile information terminal 700 may be a mobile phone, a smart phone, a tablet terminal, or the like. A PDA (Personal Digital Assistant) or a notebook PC may be used. It may also be a digital still camera, a video camera capable of capturing 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. 11A includes many components such as the sensor unit 760 that are not essential to the present embodiment, but even if the configuration does not include these components, the present embodiment without compromising the effect of In addition, a configuration (not shown) such as a digital broadcast reception function, an electronic money payment function, and the like may be added.

[Software configuration of portable information terminal]
FIG. 11B is a software configuration diagram of the portable information terminal 700 of this embodiment, and shows the software configuration in the ROM 703, RAM 704 and storage unit 710. As shown in FIG. In this embodiment, the ROM 703 stores a basic operating program 7001 and other operating programs, and the storage unit 710 stores a cooperative control program 7002 and other operating programs. The storage unit 710 also includes a content storage area 7200 for storing content such as moving images, still images, and audio, an authentication information storage area 7300 for storing authentication information required when accessing the television receiver and each server device, Various information storage areas for storing various other information are provided.

A basic operation program 7001 stored in the ROM 703 is loaded into the RAM 704, and the main control unit 701 executes the loaded basic operation program to configure a basic operation execution unit 7101. FIG. Similarly, the cooperative control program 7002 stored in the storage unit 710 is expanded in the RAM 704, and the main control unit 701 executes the expanded cooperative control program to configure the cooperative control execution unit 7102. The RAM 704 also has a temporary storage area for temporarily holding data created during execution of each operation program as needed.

In the following description, for the sake of simplicity, the basic operation program 7001 stored in the ROM 703 is loaded into the RAM 704 and executed by the main control unit 701 to control each operation block. It is assumed 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, connection, transmission and reception of each data, etc. when the mobile information terminal 700 performs cooperative operation with the television receiver. Also, the cooperation control execution unit 7102 is assumed to have a browser engine function for executing an application linked with the television receiver.

Each of the operation programs may be stored in the ROM 703 and/or the storage unit 710 in advance at the time of product shipment. It may be obtained from other application servers 500 or the like on the Internet 200 via the LAN communication section 721 or the mobile telephone network communication section 722 after product shipment. Further, each operation program stored in a memory card, an optical disc, or the like may be acquired via the expansion interface section 724 or the like.

[Time Management of Broadcast Receiver]
The broadcast receiver 100 of this embodiment has two types of time management functions. The first time management function is a time management function based on NTP, and the second time management function is a time management function based on MH-TOT. The two types of time management functions are described below.

<Time management function based on NTP>
First, the time management function based on NTP will be described.

FIG. 12A is an example of a system configuration for clock synchronization/presentation synchronization in a broadcasting system to which the broadcast receiving apparatus 100 of this embodiment is compatible. In the broadcasting system of this embodiment, the UTC is transmitted in the 64-bit NTP time stamp format from the broadcasting transmission system to the receiver (broadcast receiving apparatus 100 of this embodiment, etc.). In the NTP time stamp format, "seconds or more" of UTC are represented by 32 bits, and "less than seconds" are represented by 32 bits. However, in practice, it is difficult to reproduce one second with 32-bit precision. For this reason, as a system clock for synchronizing the video system and a system clock for operating an NTP format clock, for example, "2 to the 24th power" Hz (approximately 16.8 MHz) as shown in FIG. may be used. In addition, considering that the system clock in the conventional broadcasting system was 27 MHz and that the hardware configuration of the receiver can be easily constructed, It is desirable to employ a power-law frequency as the system clock.

In addition, when the system clock is set to a power-of-two frequency such as "2 to the 24th power" to "2 to the 28th power" on the broadcast transmission system side and the receiver side as described above, 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 referred to by the system clock or the PLL (Phase Locked Loop) system for reproducing the clock in NTP format are "0" or "1". may be fixed to . That is, if the system clock is "2 nth power" Hz (n=24 in the example of FIG. 12A, the same applies hereinafter), the lower "32-n" bits of the NTP time stamp format are set to "0" or "1". It may be fixed. Alternatively, the receiver side may be processed so as to ignore the lower "32-n" bits of the NTP time stamp 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 based on a VCO (Voltage Controlled Oscillator) of "2 nth power" Hz, and the time information given from the outside is Implement synchronized delivery system clocks. In addition, the entire signal processing system is operated in synchronization with the system clock of "2 nth power" Hz. Furthermore, the output of the transmission system clock is periodically transmitted to the receiver side via the broadcast transmission line as time information in NTP length format. The time information in the NTP length format to be transmitted to the receiver side may be fixed to "0" or "1" in the lower "32-n" bits among the 32 bits representing "less than a second". This is because the system clock counter on the broadcast transmission system side consists of 32+n bits.

On the receiver side, the time information in the NTP length format is received via the broadcast transmission line, and the receiving system clock is reproduced by the PLL system based on the VCO of "2 to the nth power" Hz, like the broadcast transmission system side. As a result, the reception system clock becomes a clock synchronized with the broadcast transmission 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 broadcasting transmission system side and the receiver side is realized, enabling stable signal reproduction. Become.

Also, the decoding time and the presentation time for each presentation unit of the video/audio signal are set on the broadcast transmission system side based on the time information in the NTP format. The decoding time is designated by an MPU extended time stamp descriptor (not shown) stored in the MPT. The presentation time is also specified by the MPU Timestamp Descriptor (see FIG. 7D) stored in the MPT. The 'mpu_sequence_number' parameter in the MPU timestamp descriptor indicates the sequence number of the MPU describing the timestamp, and the 'mpu_presentation_time' parameter indicates the presentation time of the MPU as a 64-bit NTP timestamp. format. That is, by referring to the MPU time stamp descriptor stored in the MPT, the receiver can control the presentation (display, output, etc.) timing for each MPU of video/audio signals, subtitles, superimposed text, etc. Become.

Note that when focusing on the control of the decoding timing and the presentation timing for each presentation unit of the video/audio signals described 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 time stamp format described in the MPU time stamp descriptor or the like. That is, when a clock of "2 mth power" Hz generated by frequency division of the system clock is used for controlling the decoding timing and the presentation timing, the lower order of the NTP timestamp format described in the MPU timestamp descriptor etc. It is not necessary to refer to the "32-m" bits. Therefore, the lower "32-m" bits of the NTP time stamp format described in the MPU time stamp descriptor or the like may be fixed to "0" or "1".

<Time management function based on MH-TOT>
FIG. 12B shows an example of the configuration of time information transmitted in NTP format in the time management function based on NTP described above. The "reference_timestamp" parameter, the "transmit_timestamp" parameter, etc. in the NTP format are 64-bit long NTP format time data, and the "mpu_presentation_time" parameter in the MPU timestamp descriptor shown in FIG. 7D is also 64-bit long. is time data in NTP time stamp format. The time data in the NTP length format and the time data in the NTP time stamp format are data in which "seconds or more" of UTC are represented by 32 bits, and "less than seconds" are represented by 32 bits. That is, the NTP format time information can transmit time information up to "less than a second". Furthermore, since time information in NTP format is UTC notation, unlike time management in conventional digital broadcasting, as shown in FIG. By managing both data flows using the NTP format time information, it is possible to easily match both data.

On the other hand, the time information transmitted by MH-TOT is as follows.

FIG. 12C shows an example of the data structure of MH-TOT. The broadcast receiving apparatus 100 of this embodiment can obtain the current date and time from the "JST_time" parameter of the MH-TOT. The "JST_time" parameter is, as shown in FIG. It shall contain 24-bit information represented by a Binary-Coded Decimal (BCD). The current date can be calculated by performing a predetermined operation on the 16-bit encoded data of the MJD. Also, six 4-bit binary coded decimal numbers represent "hour" in two decimal digits with the first two 4-bit binary coded decimal numbers, and 10 with the next two 4-bit binary coded decimal numbers. Two decimal digits represent "minutes", and the last two 4-bit binary coded decimal numbers represent "seconds" in two decimal digits.

That is, the difference between time management based on the NTP format and time management based on MH-TOT is that the former time management based on the NTP format can transmit time information up to "less than a second" as described above. In the latter time management based on MH-TOT, it is possible to transmit only time information up to "seconds" in JST notation.

The broadcast receiving apparatus 100 of the present embodiment performs a time management function based on NTP, which is time information in UTC notation, by decoding video, audio, subtitles, superimposed text, and other presentation data, which are contents of broadcast signals, and synchronous processing of display. , it is possible to achieve more accurate synchronization processing. Furthermore, by referring to the information in UTC notation instead of the clock notation of the broadcasting station, the video, audio, subtitles, superimposed text, or other data that is the content received by the broadcast signal, and the video and audio obtained through the communication line path. , subtitles, superimposed text, or other data, and can be decoded and displayed in synchronization.

Furthermore, in the broadcast receiving apparatus 100 of the present embodiment, the time management function based on "JST_time" including 24-bit information represented by six 4-bit binary coded decimal numbers of MH-TOT is provided to the user. It may be used for the presentation process or each process dealing with MH-EIT shown in FIG. 7E. In general, processing for presenting the current time to a user in a broadcast receiving apparatus rarely requires accuracy to the order of seconds. In addition, each time information described in MH-EIT is 24-bit information represented by six 4-bit binary coded decimal numbers, similar to EIT for conventional digital broadcasting transmitted in the MPEG2-TS system. "Hour", "minute" and "second" are stored in two decimal digits each. For this reason, the time management function based on MH-TOT in the broadcast receiving apparatus 100 of this embodiment is easy to match with each process handling MH-EIT. Specifically, each process dealing with MH-EIT includes, for example, electronic program guide generation process, recording reservation control and viewing reservation control, copyright management process such as temporary storage, and the like. This is because it is rare for any processing to require precision to within a second, and precision in units of one second is sufficient.

In addition, the generation processing of the electronic program guide, control of recording reservations and viewing reservations, copyright management processing such as temporary storage, etc. are functions that are also installed in receivers of digital broadcasting systems using the conventional MPEG2-TS method. is. Then, in the broadcasting system of the present embodiment as well, in processing such as electronic program guide generation processing, recording reservation control, viewing reservation control, copyright management processing such as temporary storage, etc., the conventional MPEG2-TS digital broadcasting system A broadcast receiver having both conventional MPEG2-TS system digital broadcast reception function and MMT system digital broadcast reception function is constructed by configuring it so as to be able to cope with time management processing consistent with . When doing so, there is no need to design a separate processing algorithm for these processes (processing for generating an electronic program guide, control of recording reservations and viewing reservations, processing for copyright management such as temporary storage, etc.). can be lowered.

In addition, even if the receiver does not have the conventional MPEG2-TS digital broadcasting reception function but has only the MMT digital broadcasting reception function, the electronic program guide generation process and the recording reservation and viewing reservation control can be performed. Therefore, even if you do not create a completely new algorithm for processing such as copyright management processing such as temporary storage, you can use the algorithm of the function that is also installed in the receiver of the digital broadcasting system using the conventional MPEG2-TS system. , can be developed at a lower cost.

Therefore, the time management function based on the "JST_time" parameter of MH-TOT is used for these processes (processing for generating an electronic program guide, control of recording reservation and viewing reservation, processing such as copyright management processing such as temporary storage) With this configuration, even an MMT digital broadcast receiver can be provided at a lower cost by improving compatibility with a conventional broadcast system.

As described above, the broadcast receiving apparatus 100 of this embodiment has a time management function using two types of time information with different accuracies. That is, the first time information is time information written in a manner consistent with a conventional digital broadcasting system, and the second time information is time information with higher resolution than the first time information. By using the second time information for synchronous processing of each content data of the broadcast signal, more advanced information presentation processing than that of the conventional broadcasting system is realized, and the first time information is used for the generation processing of the electronic program guide and the recording reservation. A broadcast receiving apparatus can be provided at a low cost by using it for control of viewing reservation, copyright management processing such as temporary storage, and the like.

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

[First modified example of time management]
Next, a first modified example 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 time management function based on NTP already described using FIG. information about the expected delay time in the time information transmission is included in the broadcast signal and transmitted, and in the broadcast receiving device 100, the information about the expected delay time is used for correcting the system clock of the time management function based on NTP. Also good.

At this time, the information about the assumed delay time is not in the TLV multiplexed stream of the protocol stack in the broadcast transmission path shown in FIG. It may be configured to transmit. If transmitted within the TMCC region, it becomes possible for the broadcast receiving apparatus 100 to extract information about the assumed delay time without going through the separation processing (demux processing) of the TLV multiplexed stream. That is, it is possible to obtain information that is less susceptible to the delay caused by the separation processing in the broadcast receiving apparatus 100, and therefore it is possible to correct the system clock with high accuracy. An example of the data structure of time information transmitted by the TMCC signal will be described with reference to FIG. 12E. The time information may be stored in, for example, the TMCC extension information area and transmitted. In the time information in the TMCC extension information area shown in the same figure, the "delta" parameter is the assumed value of the transmission delay from the time management server that distributes UTC or the server device that creates the TMCC signal to a general broadcast receiver. It is represented by a 32-bit signed fixed point. The upper 16 bits describe the integer part, and the lower 16 bits describe the decimal part. The "transmit_timestamp" parameter is a transmission time stamp, and describes the time when this TMCC signal is sent from the server device in the NTP time stamp length format. The upper 32 bits represent the integer part, and the lower 32 bits represent the decimal part.

In the first modified example, the broadcast receiving apparatus 100 of the present embodiment receives information on the assumed delay time described in the time information stored in the TMCC extension 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 of acquiring the current date and Japan Standard Time from the information transmitted by MH-TOT and managing the time. The current date and Japan standard time acquired from the information transmitted by MH-TOT are superimposed on the video information, application information, etc. by the video synthesizing unit 161 of the broadcast receiving device 100, and are displayed on the monitor unit 162 and the video output unit 163. It can be output and provided to the user. As described above, the MH-TOT has the data structure shown in FIG. 12C, 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 encoded data of MJD, overflow will occur on "April 22, 2038", and the predetermined operation A date after "April 23, 2038" cannot be represented by only the Therefore, in the second modification of this embodiment, by switching the calculation method depending on whether the value of MJD is equal to or greater than a predetermined value or less than the predetermined value, dates after "April 23, 2038" are represented. shall be controlled so that

FIG. 12F shows an example of the first calculation method used when the value of MJD is equal to or greater than a predetermined value and the 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", calculates the current date using the second calculation method. Note that the case where the MJD is less than "32768" is equivalent to the case where the most significant bit of the 16-bit data of the MJD is "0". As a result, in the broadcast receiving apparatus 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)", or the like. The switching condition of the arithmetic method may be that the upper 2 bits of the 16-bit data of MJD are "00" and the upper 2 bits of the 16-bit data of MJD are not "11". If the predetermined value is "32768" and the above means is used, dates before "September 4, 1948" cannot be represented, but this poses no particular problem in practical use as a television receiver. .

In addition, 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 in accordance with a partially or entirely replaced flag or a newly added flag. For example, the flag is set to "1" if the MJD indicates "April 23, 2038" or later when the most significant bit of the 16-bit encoded data of the MJD is "0". However, if it does not indicate "April 23, 2038" or later, "0" should be set. Then, when the flag is "1", the second calculation method shown in FIG. 12F 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 NTP format is transmitted, and the broadcast receiving apparatus 100 of this embodiment has a time management function based on the NTP. Furthermore, in the broadcast receiving apparatus 100 of the present embodiment, by referring to the NTP time stamp or the like written in the MPU time stamp descriptor set for each MPU, the decoding timing and presentation time for each presentation unit of the video/audio signal can be determined. controlling the timing. As described above, the NTP format time information has the configuration shown in FIG. 12B. Also, the MPU Timestamp Descriptor has the structure shown in FIG. 7D.

For this reason, in the broadcast receiving apparatus 100 of the present embodiment, the "reference_timestamp" parameter, the "transmit_timestamp" parameter, or the "mpu_presentation_time" parameter, etc. are referred to, and according to the value of the referred time data, etc., the It is also possible to select which one of the first calculation method and the second calculation method is to be used. That is, for example, if the most significant bit of the 64-bit NTP format time data is "0", the second calculation method is used, and if it is not "0", the first calculation method is used. Do, etc.

By any of the methods described above, it is possible to express dates after "April 23, 2038" in the broadcast receiving apparatus 100 of the present embodiment.

[Channel selection processing of broadcast receiving device (initial scan)]
The AMT of the broadcasting system of this embodiment provides a list of IP packet multicast groups for receiving IP packets transmitted by the TLV multiplexing method and IP packets transmitted over communication lines as indistinguishably as possible. shall be One service identification can list multiple IP multicast groups. Address masks can also be used to efficiently describe consecutive IP addresses.

In the broadcast receiving apparatus 100 of the present embodiment, the list of services acquired from the TLV-NIT is stored in a non-volatile memory such as the ROM 103 or the storage unit 110 at the time of channel scanning at the time of initial setting or at the time of rescanning for setting change. Further, a list of IP multicast groups corresponding to each service can be stored in the non-volatile memory as IP-related information in association with each service. do. By storing the list of services and IP-related information in a non-volatile memory so that they can be referenced at all times, there is no need to re-acquire TLV-NIT and AMT when switching channels, etc., and acquisition of broadcast content can be efficiently performed. can be done.

FIG. 13A is a diagram showing an example of an operation sequence during channel scanning (rescanning) in the broadcast receiving apparatus 100 of this embodiment.

When the channel scan is started, the reception function execution section 1102 sets the initial frequency value to the tuner/demodulation section 131 and instructs it to tune 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, original network ID, etc. from the acquired TLV-NIT. (S105). FIG. 13B shows an example of the data structure of TLV-NIT. It is assumed that the information of the TLV stream ID can be obtained from the "tlv_stream_id" parameter, and the information of the original network ID can be obtained from the "original_network_id" parameter. Furthermore, from the distribution system descriptor, obtain the distribution system information on the physical conditions of the broadcast transmission path corresponding to each TLV stream ID/original network ID (S106), and obtain a list of service IDs from the service list descriptor ( S107).

An example data structure for a satellite distribution system descriptor is shown in FIG. 13C. FIG. 13D shows an example data structure of a service list descriptor. If the TLV-NIT has a plurality of different data such as the TLV stream ID, original network ID, distribution system information, service ID list, etc., the processing of S105 to S107 is repeated. Next, the reception function execution unit 1102 creates a service list based on the data such as the TLV stream ID, original network ID, distribution system information, and list of service IDs acquired in the processing of S105 to S107. The service list is stored in the ROM 103, the storage unit 110, or the like (updated when rescanning) (S108).

Next, the receiving function executing unit 1102 acquires AMT from the received signal (S109), and further acquires a list of IP multicast groups for each service ID stored in the service list (S110). FIG. 13E shows an example of the data structure of AMT. Note that if the AMT has a list of IP multicast groups for multiple service IDs, the process of S110 is repeated. If there are multiple AMTs having IP multicast group lists for different service IDs, the processing of S109 to S110 is repeated. Next, the reception function execution unit 1102 associates the list of IP multicast groups acquired in the process of S110 with the service ID as IP-related information and stores it in the ROM 103 or the storage unit 110 (updated when rescanning). (S111).

Note that when 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. If so (S104: No), the processing of S105 to S111 is not performed.

After completing the process of S111, the reception function execution unit 1102 ends the process if the frequency value set in the tuner/demodulator 131 is the final frequency value of the channel scan range (S112: Yes). On the other hand, if the set frequency value is not the final frequency value in 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. In addition, in one TLV-NIT, if it is possible to acquire service IDs for all services that make up the broadcast network, and if it is possible to acquire an AMT having a list of IP multicast groups related to the service IDs, S112 to S113 No processing required.

Through the above-described series of processes, the broadcast receiving apparatus 100 of the present embodiment obtains a list of services (service list) constituting the broadcast network at the time of channel scanning during initial setting or at the time of rescanning for setting change. Simultaneously with creation/updating, a list of IP multicast groups (IP-related information) corresponding to each service is created/updated, and can be stored in a non-volatile memory such as ROM 103 or storage unit 110 .

In addition, rescanning for the above setting change is automatically performed when it detects that there is a change in the information in the table by referring to the "version_number" parameter of TLV-NIT or AMT. can be When a change in the "version_number" parameter of one of the TLV-NIT and AMT is detected, only information relating to the table in which the parameter change is detected may be automatically updated. However, when the aforementioned automatic update is performed, it is desirable to notify the user that rescanning has been automatically performed. Alternatively, the user may be notified that the information in the table has changed, and the user may be allowed to select whether or not to perform the rescan.

[Channel selection processing of broadcast receiving device (channel switching)]
FIG. 14A is a diagram showing an example of an operation sequence at the time of 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 reception function execution unit 1102 interprets the command sent from the remote controller and designates the service ID of the desired service (S201). Next, reception function execution section 1102 starts acquiring AMT from the received signal of tuner/demodulation section 131 . If the AMT is successfully acquired within the predetermined time (S202: Yes), information on the IP multicast group list corresponding to the service ID is acquired from the acquired AMT (S204). On the other hand, if the AMT is not successfully acquired 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 corresponding to the service ID is obtained. Information about the list of multicast groups is obtained (S204). It should be noted that IP-related information stored in the ROM 103, the storage unit 110, or the like may always be referred to without performing the determination processing of S202.

Next, reception function execution section 1102 starts acquiring TLV-NIT from the received signal of tuner/demodulation section 131 . If the TLV-NIT is successfully acquired within the predetermined time (S205: Yes), the distribution system information for acquiring the IP data flow corresponding to the service ID is acquired from the acquired TLV-NIT (S207). On the other hand, if the acquisition of the TLV-NIT has not succeeded 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 Obtain distribution system information for obtaining IP data flow (S207). Alternatively, the service list stored in the ROM 103, the storage unit 110, or the like may always be referred to without performing the judgment processing of S205.

After acquiring the distribution system information in the process of S207, the reception function executing unit 1102 next controls the tuner/demodulator 131 using the frequency value indicated by the acquired distribution system information, and obtains the service ID. (S 208 ), 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 contained in the acquired MMTP packet. (S210). Next, the transport processing unit 1102a refers to the "MMT_package_id_byte" parameter of the acquired MPT, and confirms whether or not the lower 16 bits of the "MMT_package_id_byte" parameter have the same value as the service ID. In the example of the MPT data structure shown in FIG. 7B, when the lower 16 bits of the "MMT_package_id_byte" parameter are the same value as the service ID (S211: Yes), the MMTP packet whose packet ID is "0" is It is determined that the packet is an MMTP packet having program data corresponding to the service ID, and based on the information of the acquired MPT, the MFU acquisition process is started.

On the other hand, if the lower 16 bits of the 'MMT_package_id_byte' parameter are not the same value as the service ID (S211: No), the MMTP packet having the packet ID of '0' contains program data corresponding to the service ID. Judge that it is not a packet. In this case, the transport processing unit 1102a acquires the PLT again (S212), and by confirming the acquired PLT, the packet ID of the MMTP packet for transmitting the MPT having the "MMT_package_id_byte" parameter corresponding to the service ID. (x) is confirmed (S213). Further, the transport processing unit 1102a acquires the MMTP packet whose packet ID is "x" from the input MMT data string (S214), and acquires the MPT contained in the acquired MMTP packet (S215). Furthermore, the MFU acquisition process is started based on the information of the acquired MPT.

It should be noted that the processes of S212 to S215 may be always performed without performing the processes of S209 to S211. In this case, the processing time can be shortened when the program data corresponding to the service ID is stored in an MMTP packet other than packet ID "0".

Here, the process of identifying the packet ID of the MMTP packet having the data of the program corresponding to the service ID by checking the PLT and acquiring the MPT will be described. An MMTP packet with a packet ID of "0" indicates transmission of a PA message. When multiplexing multiple packages, this PA message includes a PLT (Package List Table) as shown in FIG. 14B. The PLT has a list of packet IDs of MMTP packets that transmit PA messages containing MPTs of other packages, and by checking the PLT, PA messages containing MPTs that are entry points for each service can be identified from the package ID. It is possible to specify the MMTP packet that transmits the . FIG. 14C shows an example of the data structure of PLT. The location information for transmitting the PA message of the package indicated by the 'MMT_package_id_byte' parameter shall be specified by 'MMT_general_location_info()'.

Returning to the description of the operation sequence shown in FIG. 14A. In the MFU acquisition process, first, the transport processing unit 1102a refers to the MPT acquired in the process of S210 or S215, and acquires the IP address and packet ID of the IP data flow that transmits the desired MFU (S216). . Further, the presentation time of the MPU is acquired from the MPU time stamp descriptor arranged in the MPT, and the layout number of the MPU is acquired from the MPU presentation area designation descriptor arranged in the MPT (S217, S218), and further, An MFU is obtained based on the obtained IP address and packet ID of the IP data flow (S219). Next, encoded video data, encoded audio data, etc. are extracted from the acquired MFU, video/audio decoding processing is performed under the control of the AV decoding processing unit 1102b, and the acquired data is processed under the control of the presentation processing unit 1102h. A presentation process is performed based on the information on presentation time and the information on layout control (S220).

If the PLT cannot be acquired in the process of S212, and if the "MMT_package_id_byte" parameter that matches the service ID cannot be confirmed in the process of S213, the MMTP packet whose packet ID is "x" is retrieved in the process of S215. If it is not possible to acquire the program image output processing (that is, the processing of S216 to S220) based on the data of the MMTP packet whose packet ID is "0" acquired in the processing of S210 may be performed. . Also, in this case, it is preferable to display a message to the effect that the program corresponding to the service ID selected by the user could not be displayed.

Through the series of processes described above, the broadcast receiving apparatus 100 of the present embodiment can perform channel selection (channel switching) operation. In particular, as described with reference to FIGS. 13A and 14A , the service list and IP-related information are created at the time of channel scanning for initial setting or at the time of rescanning for setting change, and stored in ROM 103 and storage unit. 110 or the like so that it can be referred to at all times, and by referring to the service list and IP-related information stored in the ROM 103 or storage unit 110 or the like in the nonvolatile memory at the time of channel selection (channel switching), It is possible to improve the efficiency of operation during channel selection (channel switching). That is, it is possible to shorten the time from the start of tuning (channel switching) to the end of tuning (channel switching) compared to the case where AMT and TLV-NIT are reacquired at the time of tuning (channel switching). Become.

[Remote control key setting processing of broadcast receiving device]
FIG. 15A shows an example of the appearance of a remote controller (remote controller) 100R used for inputting operation instructions to the broadcast receiving apparatus 100 of this embodiment. The remote controller 100R has at least a power key 100R1, a numeric keypad 100R2, a channel up/down key 100R3, a menu key 100R4, an EPG key 100R5, a cursor key 100R6, an enter key 100R7, and a color key 100R8. A volume up/down key, a network switching key, an input switching key, a recording key, a playback key, etc. may be further provided.

For example, in the process of S201 of the operation sequence at the time of channel selection shown in FIG. 14A, when using the remote control 100R to instruct the broadcast receiving apparatus 100 of the present embodiment to switch channels, the following three methods are available. may be used. The first method is to directly input and designate the service ID of a desired channel (service) by pressing the ten key 100R2 multiple times. The second method is to repeat the depression of the channel up/down key 100R3 as necessary to forward (or reverse) the channels until the desired channel (service) is displayed. A third method is a so-called one-touch channel selection method in which a predetermined channel (service) associated with each key of the numeric keypad 100R2 is called by pressing the numeric keypad 100R2 only once. The one-touch channel selection, which is the third method, is a user-friendly channel selection method, but it is necessary to set the broadcast receiver 100 in advance to associate a predetermined channel (service) with each key of the numeric keypad 100R2. be.

The broadcast receiver 100 corresponding to the broadcast system of the present embodiment can automatically set the association based on the control information included in the digital broadcast wave received by the tuner/demodulator 131. and That is, the broadcasting system of this embodiment prepares a remote control key descriptor as a TLV-SI descriptor. The setting of the association may be performed by referring to the remote control key descriptor.

FIG. 15B shows an example data structure of a remote control key descriptor. A "service_id" parameter in the figure is a service ID for identifying a channel (service). A 'remote_control_key_id' parameter is a recommended remote control button number for allocating a channel (service) identified by the service ID. The channel (service) identified by the "service_id" parameter may be associated with the key specified by the "remote_control_key_id" parameter value of the numeric keypad 100R2 according to the values of the parameters.

If there are many channels (services) in the same network, the channels (services) may be assigned to keys other than the numeric keypad 100R2. For example, a predetermined channel (service) is assigned to the color key 100R8. In this case, a numeric value corresponding to the "remote_control_key_id" parameter may be assigned in advance to each key of the color key 100R8.

A remote control key descriptor may be described as a TLV-NIT descriptor. Therefore, for example, when the TLV-NIT acquired in the process of S103 of the operation sequence during channel scanning shown in FIG. 13A is valid data, the remote control key descriptor description By storing the contents in the ROM 103 of the broadcast receiving apparatus 100 or a non-volatile memory such as the storage unit 110, the setting of the association may be performed.

The setting of the association can be done according to the description contents of the remote control key descriptor as described above, or the user can appropriately assign the service of an arbitrary channel to each key of the numeric keypad 100R2 according to his/her preference. You can go by the way. Also, in the non-volatile memory of the broadcast receiving apparatus 100, both the association setting corresponding to the description content of the remote control key descriptor and the association setting assigned according to the user's preference are stored at the same time. By choice, only one setting may be used. Also, in this case, association settings assigned by the user according to preference may be preferentially used. Further, according to the value of the priority flag described in the remote control key descriptor, the setting of the association according to the description contents of the remote control key descriptor has priority over the setting of the association assigned according to the preference of the user. It is also possible to use The priority flag may be set by using part or all of the "reserved" parameter of the remote control key descriptor shown in FIG. 15B, or may be set by adding a new parameter. In this case, it may be possible to control the value of the priority flag for each service ID.

Further, when the non-volatile memory stores association settings assigned according to the user's preference, the association settings according to the description content of the remote control key descriptor are not stored in the non-volatile memory. can be Also, in the non-volatile memory of the broadcast receiving apparatus 100, only the setting of association assigned according to the user's preference is stored, and when the TLV-NIT being received contains a remote control key descriptor, Using the association setting according to the description content of the remote control key descriptor, and if the remote control key descriptor is not described in the TLV-NIT being received, the association assigned according to the user's preference You can also use the settings.

The process of changing the association of each key of the numeric keypad 100R2 with a predetermined channel (service) according to the description content of the remote control key descriptor is described in the service list descriptor in the network specified by TLV-NIT. It may be performed simultaneously for all services, or may be performed only for some services. When the above processing is performed only for some services, the old settings may be retained as they are for the other services. Further, when the "service_id" parameter is a predetermined value (for example, 999, etc.), the setting designated by the "remote_control_key_id" parameter among the set contents stored in the non-volatile memory of the broadcast receiving apparatus 100 You may make it erase only about.

That is, in the broadcast receiving apparatus 100 of this embodiment, it is possible to set association of a predetermined channel (service) with each key of the numeric keypad 100R2.

[Channel selection processing for multi-organization channels]
Also in the broadcasting system of this embodiment, it is assumed that multi-programming is possible in which a plurality of programs are broadcast in parallel on one channel (service). In the case of simultaneous broadcasting of a plurality of programs by multi-programming, it is conceivable that the aforementioned one-touch channel selection is possible only for the main channel of the multi-programming and not possible for the sub-channels of the multi-programming. That is, when selecting a sub-channel of a multi-set, a method of directly inputting and specifying a service ID is used, or a one-touch tuning is used to once select a main channel of a multi-set and then press the channel up/down key 100R3. It is necessary to use a method of selecting a desired sub-channel by pressing the button, and there is a problem that the operation becomes complicated.

In order to solve the above problem, in the broadcast receiving apparatus 100 of this embodiment, the function of one-touch channel selection is expanded, and the numeric keypad 100R2 assigned with a predetermined service ID is repeatedly pressed a plurality of times within a predetermined time. This makes it possible to directly select sub-channels of a multi-organization.

Description will be made with reference to FIG. 16A. For example, it is assumed that the "1" key of the numeric keypad 100R2 of the remote controller 100R is assigned in advance the service of the 011 channel. In this case, if the channel selection operation is performed in a state in which the multi-organization is not performed (see (A) in the figure), channel 011 is selected regardless of the number of times the "1" key is pressed. On the other hand, in the case of channel selection operation in the state of multi-organization (see (B) in the figure), if the "1" key is pressed only once, channel 011 is selected, and the first "1" key is pressed. If the "1" key is pressed again within a predetermined time after the key is pressed, channel 012 is selected. Similarly, when the "1" key is pressed three times within a predetermined time, channel 013 is selected. Note that if the "1" key is pressed again after a predetermined period of time has passed since the "1" key was pressed for the first time, the 011 channel may remain selected.

By enabling the operation as described above, the broadcast receiving apparatus 100 of the present embodiment enables direct selection of sub-channels during multi-programming with a simpler operation.

Similarly, angle selection of a multi-view compatible program and selection of a predetermined video asset from a plurality of video assets may be performed by repeatedly pressing the numeric keypad 100R2 a plurality of times. As shown in FIG. 16B, when the service ID of the multi-view compatible program is assigned to the "1" key of the numeric keypad 100R2 of the remote controller 100R, pressing the "1" key only once selects the multi-view compatible program. It shall be closed and the main view shall be displayed. Further, if the "1" key is pressed again within a predetermined time after the "1" key is pressed for the first time, the subview 1 of the multi-view compatible program is displayed. Similarly, when the "1" key is pressed three times within a predetermined period of time, subview 2 of the multiview compatible program is displayed. If the "1" key is pressed again after a predetermined time has passed since the "1" key was pressed for the first time, the main view of the multi-view compatible program may remain displayed. Selection of a predetermined video asset from a plurality of video assets may also be possible by the same operation as described above.

By enabling the operations as described above, the broadcast receiving apparatus 100 of the present embodiment enables angle selection of a multi-view compatible program and selection of a predetermined video asset from a plurality of video assets with a simpler operation. and

Note that when one or more programs in multi-programming are multi-view compatible programs or programs having multiple assets, only one of the above-described operations may be enabled and the other may be disabled. For example, if one or more programs during multi-programming are multi-view compatible programs or programs that have multiple assets, the operation of pressing the same key multiple times within a predetermined period of time directly selects sub-channels during multi-programming. to be assigned to the processing of Which operation is enabled or disabled may be determined in advance or may be selected by the user.

[Screen layout control of broadcast receiver]
It is assumed that the broadcast receiving apparatus 100 of this embodiment is capable of screen layout control based on the LCT description. FIG. 17A shows an example of the data structure of LCT. FIG. 17B shows an example of the data structure of the MPU presentation area specification descriptor.

In the data structure of the LCT, the "left_top_pos_x" parameter and the "right_down_pos_x" parameter are, in particular, the upper left horizontal position and the lower right horizontal position of the area when the left side of the full screen display is "0"/right side is "100" The horizontal position is indicated 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 positions of the upper left and lower right of the area when the upper side of the full screen display is "0" and the lower side is "100". Shown as a ratio to the total number of pixels. Also, the "layer_order" parameter indicates the relative position of the region in the depth direction.

An example of allocation of layouts to layout numbers based on the setting of each parameter will be described below together with the setting values of each parameter.

FIG. 17C shows the default layout setting of the broadcast receiving apparatus 100 of this embodiment, and is an example of setting only one area on the entire screen. FIG. 17D is an example in which the entire screen is divided into three areas, each of which is designated as "area 0", "area 1", and "area 2". For example, when the number of pixels of the entire screen is 7680 horizontal pixels/4320 vertical pixels, "region 0" has a "left_top_pos_x" parameter of "0", a "left_top_pos_y" parameter of "0", and a "right_down_pos_x" parameter of "80". , and the 'right_down_pos_y' parameter is '80', so it is set within the range of (0, 0)-(6143, 3455). Similarly, "area 1" is set in the range of (6144,0)-(7679,4319), and "area 2" is set in the range of (0,3456)-(6143,4319).

FIG. 17E is an example of setting three regions in the same way as in FIG. 2” is placed in front of “area 0” according to the setting of the “layer_order” parameter, in the same range as described above. In FIG. 17F, "area 0" is set to device 0 (default device: broadcast receiving apparatus 100 in this embodiment), and "area 1" is set to device 1 (mobile information terminal 700 in this embodiment). This is an example of when

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 the receiver as intended by the service provider.

It should be noted that a predetermined background color designated by a background color designation descriptor written in the LCT may be displayed in areas where no program video or data screen is displayed by the aforementioned screen layout control. Further, when the background color specification descriptor is not included in the LCT and the broadcast receiving apparatus 100 cannot correctly acquire the background color specification descriptor, the predetermined background color specified by the background color specification descriptor is In cases such as when display is not possible due to hardware limitations, the image display device 100 may display a predetermined pattern in the area. Also, the area may be used as a notification display area for the user from the video display device 100 . Note that the notification may be arbitrary information.

Fractions below the decimal point generated when the screen is divided according to the set values of parameters such as "left_top_pos_x" may be rounded up or down. Rounding (or rounding off to zero in binary numbers) may be used. For example, the number of pixels in the entire screen is 7680 pixels/vertical 4320 pixels, the 'left_top_pos_x' parameter of 'region 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 '51'. parameter is "51", "area 0" may be set in the range of (0, 0)-(3916, 2203) by rounding up, or (0, 0)-(3915, 2203) by rounding down. 2202) may be set to "area 0". Also, in consideration of macroblocks during video compression processing, rounding up/down processing may be performed in units of 8 pixels, 16 pixels, or the like. By the above processing, it is possible to efficiently perform area setting based on LCT and resolution conversion processing of multimedia content in the area.

Alternatively, the setting values of parameters such as "left_top_pos_x" may be limited to "multiples of 5" or "multiples of 10" within the range of "0" to "100". Also in this case, it is possible to preferably perform the area setting.

The content displayed in each area is designated by the MPU presentation area designation descriptor shown in FIG. 17B. It is assumed that the content of the MPU whose sequence number is specified by the 'mpu_sequence_number' parameter in the figure is associated with the description of the LCT by the 'layout_number' parameter and the 'region_number' parameter.

Also, in the first "for" loop of the description of the MPU presentation area specification descriptor, a plurality of "layout_number" parameters and "region_number" parameters are described for one "mpu_sequence_number" parameter, and layout is performed according to any of the descriptions. The user may be allowed to select whether to perform control. For example, in the first "for" loop, if a "layout_number1" parameter, a "region_number1" parameter, a "layout_number2" parameter, and a "region_number2" parameter are described for a predetermined "mpu_sequence_number" parameter, the above " mpu_sequence_number” parameter, let the user select whether the layout control of the MPU is performed based on the “layout_number1” parameter and the “region_number1” parameter, or based on the “layout_number2” parameter and the “region_number2” parameter, etc. is. In this way, the user can control the layout of the video program as desired.

[Exception processing of screen layout control of broadcast receiving device]
In the broadcast receiving apparatus 100 of the present embodiment, even if the screen layout area control is performed by the above-described LCT, when the user instructs to display the EPG screen, etc., as exception processing, It is assumed that it is possible to perform screen layout control ignoring the description content of the LCT. FIG. 18A shows an example of the operation of exception processing of screen layout control based on LCT.

The same screen layout control as in FIG. 17D is performed by the description of LCT, the broadcast program video is displayed in "area 0", and the program link data 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 controller (not shown) while the content is being displayed, the broadcast receiving apparatus 100 of the present embodiment displays the LCT description as shown in FIG. 18A(A). Regardless of the content, the screen layout setting is returned to the default setting (that is, the screen layout is controlled in the same manner as in FIG. 17C), and the EPG screen is displayed on the entire screen. Furthermore, when the user gives an instruction to end the display of the EPG screen, the screen layout control is re-executed according to the description contents of the LCT.

By performing the above-described control, the EPG screen can be displayed larger than when the EPG screen is displayed while maintaining the area control of the screen layout as shown in FIG. Visibility can be improved.

Note that the exception processing of the screen layout control is not only applied when displaying the EPG screen, but as shown in FIG. ) may be applied when displaying a child screen or when displaying two screens.

In the case of the recording setting screen shown in FIG. 8A, the display area of the broadcast content is changed from the entire screen to only the child screen portion at the bottom right of the screen. Similarly, in the case of the two-screen display shown in FIG. 2B, the display area of the broadcast content is changed from the entire screen to only the split screen portion on the left side of the middle stage of the screen. In either case, the display area for displaying the broadcast content is narrower than when the entire screen is used. It is not preferable visually to display a plurality of broadcast contents at the same time. Therefore, in the broadcast receiving apparatus 100 of the present embodiment, only the broadcast content of "area 0" is selected and displayed in the display area in the above situation. It should be noted that the broadcasting content of "area 1" or "area 2" may be selected and displayed according to the state of area selection immediately before.

By performing the control described above, it is possible to improve the visibility of the broadcast content compared to the case where various broadcast content is displayed while maintaining the area control of the screen layout. The same is true for sub-screen display on the recorded program list screen, browser display of Internet content, and the like.

[Video signal aspect ratio conversion processing]
The aspect ratios of video signals in television broadcasting services include "4:3" used in conventional SDTV, "16:9" used in recent HDTV, and "21:9" suitable for movie content. , etc. Information on the aspect ratio of the video signal may be described by a video component descriptor in the broadcasting system of the present embodiment. FIG. 19A shows an example data structure of a video component descriptor. In the figure, the "video_aspect_ratio" parameter is information about the aspect ratio of the video signal. FIG. 19B shows an example of the meaning of the "video_aspect_ratio" parameter. Further aspect ratios different from those shown may be assigned.

On the other hand, the aspect ratio of the display unit of a television receiver capable of receiving the television broadcast service (such as the broadcast receiver 100 of the present embodiment) is generally "16:9". That is, when displaying video content with an aspect ratio of "4:3" or "21:9" on a general television receiver, aspect ratio conversion processing may be performed.

Whether or not to perform the aspect ratio conversion process may be determined by comparing the specifications of the monitor section 162 of the broadcast receiving apparatus 100 and the "video_aspect_ratio" parameter of the video component descriptor. For example, when the aspect ratio of the monitor unit 162 of the broadcast receiving apparatus 100 is "16:9" (3840 horizontal pixels x 2160 vertical pixels, etc.), the value of the "video_aspect_ratio" parameter is "0", "2", or " If it is "3", the aspect ratio conversion process should not be performed, and if it is "1" or "5", the aspect ratio conversion process should be performed. Further, for example, when the aspect ratio of the monitor unit 162 of the broadcast receiving apparatus 100 is "21:9" (5040 horizontal pixels x 2160 vertical pixels, etc.), the value of the "video_aspect_ratio" parameter is "0" or "5". If so, the aspect ratio conversion process should not be performed, and if it is "1", "2", or "3", the aspect ratio conversion process should be performed.

19C and 19D show an example of aspect ratio conversion processing when the aspect ratio of the monitor unit 162 of the broadcast receiving apparatus 100 is "16:9" and the value of the "video_aspect_ratio" parameter is "5". When video content with an aspect ratio of “21:9” is displayed on the monitor unit 162 with an aspect ratio of “16:9”, adding black bars above and below the video content with an aspect ratio of “21:9” reduces the aspect ratio. may be converted to "16:9" (display A in the figure). By doing so, it is possible to display the entire area of the original video content without distortion. Alternatively, only the center portion of the video content with the aspect ratio of "21:9" may be cut out and displayed on the monitor unit 162 (display B in the figure). By doing so, it is possible to display the main portion of the original video content in a large size. Further, it is also possible to add a little black bands to the top and bottom of the video content with the aspect ratio of "21:9" and further cut out the central portion (display C in the figure). In this way, most of the original video content can be displayed in a large size. Also, the left and right edges of the video content with the aspect ratio of "21:9" may be compressed to display the entire area (display D in the figure). By doing so, it is possible to display the entire area of the original video content in a large size and to display the main portion without distortion. In addition, it is also possible to add a little black bands to the top and bottom of the video content with the aspect ratio of "21:9" and further compress the left and right edges to display the entire area (display E in the figure). In this way, it is possible to display the entire area of the original video content with less distortion at the left and right edges.

A user can select how to perform the aspect ratio conversion process by setting a menu or the like. Alternatively, switching may be performed by pressing a predetermined key on a remote controller or the like. Note that the aforementioned aspect ratio of "21:9" includes an aspect ratio of roughly "21:9" such as "2.35:1" of the so-called Cinemascope. The same applies to other aspect ratio values.

[EPG display of broadcast receiving device]
In the broadcasting system of this embodiment, it is assumed that the MH-EIT transmits time-series information about events (so-called programs) included in each service that constitutes the broadcasting network. MH-EIT shown in FIG. 7E is identified into two classes by the table ID (corresponding to the "talbe_id" parameter in the figure), the information of the current/next event of the own TLV stream and the information of each event of the own TLV stream It shall be possible to indicate schedule information. The broadcast receiving apparatus 100 of the present embodiment refers to the MH-EIT or the like and performs identification by 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. can be acquired to create an EPG screen, and the created EPG can be superimposed on video information or the like by the video synthesizing unit 161 and displayed on the monitor unit 162 .

FIG. 20A is a diagram showing an example of an EPG screen in broadcast receiving apparatus 100 of this embodiment. The EPG screen 162a displays detailed information of a broadcast program broadcast on each channel in each time zone in a matrix form with the vertical axis representing time and the horizontal axis representing service IDs (channels). Further, the detailed information 162a1 of each broadcast program is mainly composed of a title area 162a2 and a detailed description area 162a3. The detailed information 162a1 of each broadcast program may display program information or the like described in the MH-short format event descriptor or the MH-extended format event descriptor and distributed. If the amount of program information, etc. described in each descriptor is large, it may be displayed in an abbreviated manner normally, and all program information may be displayed in a pop-up or the like when selected by operating a remote controller (not shown). . Alternatively, at the time of selection, the portable information terminal 700 may be instructed to transmit the program information and the like described in each descriptor to the portable information terminal 700 in cooperative operation and display it on the display unit 741 .

In the title area 162a2 of the detailed information 162a1 of each broadcast program, the program title of the broadcast program and symbols representing attributes of the broadcast program are displayed. The symbol or the like representing the attribute of the broadcast program is, for example, a symbol/character indicating that the program is a new program, a symbol/character indicating that the program is a rebroadcast program, or the like. Alternatively, a mark or the like that symbolizes "data", which means that data broadcasting by a broadcasting service is supported, may be used. Alternatively, a mark 162a4 or the like symbolizing "NetWork", which means that contents, applications, and the like related to the broadcast program can be obtained from the network, may be used. Also, the symbol or the like representing the attribute of the broadcast program may be substituted by distinguishing 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.

It should be noted that each control information (message, table, descriptor, etc.) in the broadcasting system of the present embodiment indicates that contents, applications, etc. related to the broadcast program can be obtained from the network. However, if the LAN communication unit 121 of the broadcast receiving apparatus 100 is not connected to the LAN cable, or the server apparatuses on the network cannot be accessed, the mark 162a4 symbolizing "NetWork" is displayed. etc. may be controlled so as not to be displayed.

In addition, when the broadcast program is a distribution program distributed via the Internet 200 and cannot be acquired only from the broadcast wave, the broadcast receiving device 100 is the same as described above, and each server device on the network 20B, the detailed information 162b1 displayed on the EPG screen 162b may be grayed out. That is, control is performed so as not to display detailed information on distribution programs that cannot be viewed. Further, the background color of the detailed information 162b1 may be differentiated from others as an alternative to the grayout processing. Alternatively, a message such as "This program cannot be viewed" may be displayed in the detailed explanation area 162a3 of the distribution program. When the detailed information 162b1 is selected by operating a remote controller (not shown), the broadcast receiving apparatus 100 is notified that the server apparatus on the network cannot be accessed, or the distributed program associated with the detailed information 162b1 is viewed. The user may be notified of the impossibility by pop-up or the like.

Through the above-described controls, the broadcast receiving apparatus 100 can provide program information of each broadcast program in a form that does not give the user a sense of discomfort, depending on the network connection status.

FIG. 20C 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 names of broadcasting stations for each channel. It is assumed that the broadcast program to be distributed and the distribution program to be distributed via the Internet 200 (information 162c1 in the frame indicated by "net broadcasting" in the figure) are provided simultaneously.

As shown in the figure, when there is a channel having only a distribution program distributed via the Internet 200, normally all channels (including information 162c1) are displayed as shown in the EPG screen 162c of the figure (A). control to display the information of On the other hand, when the broadcast receiving device 100 cannot access each server device on the network, etc., as shown in the EPG screen 162d in FIG. It may be controlled not to display the information of the channel of "M2 broadcasting (net broadcasting)" (information 162c1 in FIG. 4A).

Through the above-described controls, the user of the broadcast receiving apparatus 100 can eliminate the need to confirm information on channels that he or she cannot view.

[Emergency warning broadcast display on broadcast receiver]
The broadcast receiving apparatus 100 of the present embodiment performs emergency warning broadcast reception processing when the emergency warning broadcast activation 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 broadcast program on a dedicated channel (service ID), may be provided as a full screen display application, or may be provided as superimposed text as text information. When the emergency warning broadcast is provided in superimposed text as text information, it is preferable to display the superimposed text information regardless of the state of the broadcast receiving apparatus 100 immediately before receiving the emergency warning broadcast. That is, as shown in FIG. 21, when the 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 emergency warning broadcast The character information 162e1 is superimposed on the program screen 162e and displayed. Similarly, when the user instructs the display of the EPG screen and an emergency warning broadcast is received while the EPG screen 162f is being displayed on the monitor unit 162, the character information 162f1 from the emergency warning broadcast is superimposed on the EPG screen 162f. control to display

With the above-described control, in the broadcast receiving apparatus 100 of the present embodiment, even when the user selects and displays an EPG screen, various setting screens, a recorded program list screen, an Internet browser, etc., the emergency warning broadcast is performed. is received, it is possible to avoid overlooking important character information based on the emergency warning broadcast. Note that this control may be performed on normal superimposed character information that is not based on the emergency warning broadcast.

When the emergency warning broadcast is provided as a broadcast program on a dedicated channel (service ID), regardless of the channel (service ID) of the program currently being viewed, the channel (service ID) of the emergency warning broadcast is It is also possible to select a channel automatically. In addition, when the emergency warning broadcast is provided as a broadcast program on a dedicated channel (service ID) or as an application, the cooperation function execution unit 1103 controls an external portable terminal device (this embodiment , the broadcast program and application of the emergency warning broadcast may be distributed to the mobile information terminal 700, etc.).

Further, if the power of the broadcast receiving device 100 is not turned on when the emergency warning broadcast is distributed, the power of the broadcast receiving device 100 may be automatically turned on. Alternatively, control may be performed so as to transmit a notification to the effect that the emergency warning broadcast has started to the portable information terminal 700 that has a history of cooperative operation with the broadcast receiving apparatus 100 .

By the control described above, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to avoid overlooking display of important broadcast programs and application images based on the emergency warning broadcast.

[Display control exception handling]
The broadcast receiving apparatus 100 of this embodiment may, for example, perform the following exception processing when data transmitted through a path other than the TLV stream cannot be acquired among the data constituting the same package.

As described using FIG. 7A, in the broadcasting system to which the broadcast receiving apparatus 100 of the present embodiment is compatible, data obtained from the TLV stream and the TLV stream are based on the location information (see FIG. 7C) stored in the MPT. It is possible to include data obtained from paths other than the one in the same package. However, data transmitted by data transmission paths other than the TLV stream indicated by the location information (for example, IPv4 data flow or IPv6 data flow of the communication line, MPEG2-TS of broadcasting, etc.) is the reception function of the TLV / MMT stream. is the data obtained by another receiving function. Therefore, even when the broadcast receiving apparatus 100 is in operation, there is a situation where the reception function of these transmission paths is not in operation, or even if the reception function itself is in operation, the relay apparatus or the like on the transmission path is in operation. data acquisition from these transmission paths, such as a situation where there is no wired or wireless connection for these transmission paths, a situation where the broadcast receiving apparatus 100 is installed in an environment where these transmission paths cannot be connected in the first place, etc. may not be possible.

Under such circumstances, the location information stored in the MPT receives an event indicating that the data acquired from the TLV stream and the data acquired from the path other than the TLV stream are associated so as to be included in the same package. In this case, the broadcast receiving apparatus 100 of this embodiment may perform the following operations.

For example, LCT, as shown in FIG. 17D and FIG. 17E, has set a plurality of areas in the screen, displays the program video based on the data obtained from the TLV stream in "area 0", "area 1" and When "area 2" is associated so that content based on data acquired from a transmission path other than the TLV stream is displayed, and the TLV stream to be displayed in "area 1" or "area 2" is not displayed When the data of the transmission route cannot be acquired, the layout display of the multiple areas specified by the LCT may be prohibited. Specifically, even if the LCT is received, the program video based on the data acquired from the TLV stream is displayed in the "area 0" of the default layout display shown in FIG. It is preferable not to shift to such a layout display of multiple areas. Furthermore, in this state, even if an instruction to change from the default layout to the layout indicated by the LCT is input to the operation input unit 170 of the broadcast receiving apparatus 100, the default layout display shown in FIG. It is also possible to switch to the data broadcast screen so as not to shift to the layout display of multiple areas as shown in FIGS. 17D and 17E.

In addition, LCT, as shown in FIG. 17D and FIG. 17E, has set a plurality of areas in the screen, and displays the program video based on the data acquired from the TLV stream in "area 0", "area 1" and When "area 2" is associated so that content based on data acquired through a transmission path other than the TLV stream is displayed, and the TLV stream to be displayed in "area 1" or "area 2" is not displayed As another example of operation when the data of the transmission route cannot be acquired, the display frames of the multiple areas shown in FIG. 17D and FIG. or a predetermined still image is displayed, and if data on the transmission path other than the TLV stream indicated by the location information of the MPT cannot be acquired even after the predetermined time has passed, the state of the default layout display shown in FIG. 17C is restored. Display switching may be performed. In this case, when the layout in FIG. 17C is changed to the layout in FIG. 17D or 17E, and when the layout in FIG. 17D or 17E is changed to the layout in FIG. If the program image based on the data obtained from the device is continuously displayed, the user can continue viewing the program image, which is preferable.

In addition, since the data of the transmission path other than the TLV stream to be displayed in "area 1" and "area 2" cannot be acquired, the data acquired from the TLV stream is displayed in "area 0" of the default layout display shown in FIG. 17C. When the program image based on the program image is displayed, the operation of various communication functions and various reception functions of the broadcast receiving device 100 of the present embodiment starts, the communication environment / communication status of various communication functions, and various reception functions Due to changes in the receiving environment/receiving status of , there may be a situation where data on transmission paths other than the TLV stream to be displayed in "area 1" or "area 2" can be acquired. In this case, the broadcast receiving apparatus 100 of this embodiment immediately switches from the default layout display shown in FIG. 17C to the layout of multiple areas shown in FIGS. It may be switched to display the program video based on the data acquired from the TLV stream in , and display the content based on the data acquired from the transmission path other than the TLV stream in "area 1" or "area 2". Alternatively, the layout may not be changed immediately, but may be changed after an instruction to change from the default layout to the layout indicated by the LCT is input from the operation input unit 170 . In this case, it is preferable to notify the user by OSD display or the like that the layout can be changed.

[Copyright protection function]
In the digital broadcasting system to which the broadcast receiving apparatus 100 of the present embodiment is compatible, by transmitting copy control information in the MPT or the like, for example, "unlimited copying"("unlimited copying and encryption during storage and output and "unlimited copying and no encryption processing required during storage and output"), "only one generation copy allowed", "predetermined number of copies allowed" (e.g., 9 times The copy control state of the content referred to by the MPT or the like may be indicated, such as so-called "dubbing 10" if copying is allowed and move is allowed once), or "copying is prohibited." In this case, according to the copy control information, the broadcast receiving apparatus 100 of the present embodiment accumulates the content in the storage (accumulation) unit 110, records it in the removable recording medium, outputs it to the external device, and outputs it to the external device. copy, move processing to an external device, and the like may be controlled.

Note that the object of the accumulation process is not only the storage (accumulation) unit 110 inside the broadcast receiving device 100, but also a removable recording medium subjected to protection processing such as encryption processing so that it can be played back only by the broadcast receiving device 100. External equipment and the like may also be included. Specifically, for example, among external recording devices such as an HDD connected to the expansion interface unit 124, those that are made recordable and reproducible only by the broadcast receiving device 100 are included.

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

First, when the copy control information included in the MPT or the like indicates "unlimited copying", the broadcast receiving apparatus 100 of the present embodiment performs accumulation in the storage (accumulation) section 110, recording on a removable recording medium, external Output to equipment, copy to external equipment, move processing to external equipment, etc. may be performed without restriction. However, if the control based on the copy control information is divided into "unlimited copying allowed and encryption processing required during storage and output" and "unlimited copying allowed and encryption processing unnecessary during storage and output" , ``Unrestricted copying is possible and encryption processing is required at the time of storage and output. , move processing to an external device, etc. can be performed without restriction, but it is necessary to perform encryption processing in each case.

Further, when the copy control information included in the MPT or the like indicates that "only one generation can be copied", the broadcast receiving apparatus 100 of the present embodiment encrypts and accumulates data in the storage (accumulation) unit 110, and receives broadcast data. Recording on a removable recording medium that has undergone protection processing such as encryption processing so that it can be played back only by the device 100 may be possible. Also, when outputting the stored content to an external device for viewing, it is encrypted together with the copy control information of "copy prohibited" and output. Also, a so-called move process to an external device (a process of copying the content to the external device and rendering the content in the storage (accumulation) unit 110 of the broadcast receiving apparatus 100, etc., unreproducible by erasing processing or the like) is allowed.

Further, when the copy control information included in the MPT or the like indicates that "predetermined number of copies are permitted", the broadcast receiving apparatus 100 of the present embodiment performs processing of encrypting and storing in the storage (storage) unit 110, It may be possible to perform processing for recording onto a removable recording medium that has undergone protection processing such as encryption processing so that it can be played back only by the device 100 . Also, when outputting the stored content to an external device for viewing, it is encrypted together with the copy control information of "copy prohibited" and output. Also, it is possible to perform copy and move processing to an external device a predetermined number of times. In the case of the so-called "Dubbing 10" rule, it is possible to perform 9 copies to an external device and 1 move processing.

Further, when the copy control information included in the MPT or the like indicates "copy prohibited", the broadcast receiving apparatus 100 of the present embodiment prohibits accumulation (copying) to the storage (accumulation) section 110 or the like. However, the broadcast receiving apparatus 100 is stored only for a predetermined time period or a predetermined time period specified by control information included in the broadcast signal (for example, by MH-Expire descriptors, content usage control descriptors, etc.). ) may be configured to have a "temporary storage" mode that enables storage in the unit 110 or the like. In this case, even if the copy control information included in the MPT or the like indicates "copy prohibited", the broadcast receiving apparatus 100 can temporarily hold the content in the storage (accumulation) unit 110 or the like. and When outputting a content whose copy control information included in an MPT or the like is "copy prohibited" to an external device for viewing, it is encrypted together with the copy control information "copy prohibited" and output.

In addition, the output for viewing to the external device described above is performed via the video output unit 163 and the audio output unit 166 of the broadcast receiving apparatus 100 of the present embodiment, or the digital I/F unit 125, the LAN communication unit 121, or the like. you should go. The copy or move processing to the external device described above may be performed via the digital I/F unit 125, the LAN communication unit 121, or the like.

FIG. 22A shows an example of the data structure of the content copy control descriptor in the broadcasting system of this embodiment. It is assumed that the "digital_recording_control_data" parameter in the drawing is the digital copy control information and indicates information for controlling the copy generation of the content. FIG. 22B shows an example of parameter values of the digital copy control information and their meanings. For example, if the parameter is "00", it indicates "unlimited copying", if the parameter is "01", it can be defined by the operator, and if the parameter is "10", If the parameter is "11", it indicates "copy prohibited". Also, FIG. 23 shows an example of the data structure of the content usage control descriptor in the broadcasting system of this embodiment. It is assumed that the "copy_restriction_mode" parameter in FIG.

In the broadcast receiving apparatus 100 of the present embodiment, when the digital copy control information is "01", it is assumed that the storage process is capable of performing a predetermined number of copies predetermined by the broadcaster. Alternatively, when the digital copy control information is not "11" and the copy restriction mode indicates that the number of limited copies is allowed, it is possible to execute storage processing that allows copying a predetermined number of times predetermined by the broadcaster. Also good. Alternatively, in this case, the allowable number of copies for each content may be specified by using part or all of the "reserved_future_use" parameter of the digital content usage descriptor.

By the above processing, the broadcast receiving apparatus 100 of the present embodiment can realize the above-described content copy control of "predetermined number of copies allowed".

Also, when the 'retention_mode' parameter in the content usage control descriptor shown in FIG. It indicates whether or not to Also, the "retention_state" parameter is the allowable temporary accumulation time, and indicates the allowable temporary accumulation time when the temporary accumulation allowable bit permits the temporary accumulation of the target content.

In the broadcast receiving apparatus 100 of the present embodiment, by referring to the information of the temporary accumulation control bit and the temporary accumulation allowable time, temporary It is possible to control whether or not to perform the accumulation and the accumulation time.

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

<Content output control>
Next, a specific example of processing for controlling output of content to an external device will be described below.

In the content usage control descriptor shown in FIG. 23, the "image_constraint_token" parameter is a resolution restriction bit, and indicates whether or not image quality restriction is necessary when outputting content to an external device. When the resolution restriction bit indicates that image quality restriction is necessary, the broadcast receiving apparatus 100 of this embodiment restricts the image quality of the target content when outputting the target content to an external device. It should be noted that the image quality limitation may not be necessary when storing in the storage (accumulation) unit 110 or the like. The image quality limitation is, for example, converting received (or accumulated) UHD (7680 pixels x 4320 pixels) video content into SHD (3840 pixels x 2160 pixels) video and outputting it, or HD (1920 pixels x 1080 pixels) For example, a pixel) image is converted into an SD (640 pixels×480 pixels) image and output. The extent to which the image quality of the target content is restricted, that is, the resolution of the image quality after image quality restriction is specified by using part or all of the "reserved_future_use" parameter of the digital content usage descriptor. You can do it.

In the same way as described above, for example, by using some or all of the "reserved_future_use" parameters, a frame rate limit bit and a pixel resolution limit bit are prepared, and when content is output to an external device, the frame rate limit and the pixel resolution limit can be set. You may make it control. When the frame rate limit bit indicates that the frame rate must be limited, the broadcast receiving apparatus 100 of the present embodiment limits the frame rate of the target content when outputting the target content to an external device. Assumed to be performed. For example, video content with a frame rate of 120 Hz is converted to a frame rate of 60 Hz and output. Further, when the pixel resolution limit bit indicates that the pixel resolution needs to be limited, the broadcast receiving apparatus 100 according to the present embodiment, when outputting the target content to an external device, sets each pixel of the target content to The resolution shall be limited. For example, each pixel of video content in which each pixel consists of 12 bits is converted to 8 bits and output.

Furthermore, a resolution limit control flag, a frame rate limit control flag, and a pixel resolution limit control flag are prepared by using a part or all of the "reserved_future_use" parameter, and the resolution limit control flag, the frame rate limit control flag, and the pixel It may be controlled whether or not to perform the image quality limitation, frame rate limitation, and pixel resolution limitation according to the resolution limitation control flag. For example, when the resolution limit control flag indicates that the resolution limit control is to be performed according to the interface specification, if the interface that outputs the target content has a predetermined content protection technology, the image quality limit is not performed, and the predetermined If the content protection technology is not provided, control may be performed so that the image quality is restricted.

Specifically, for example, when the digital interface unit 125 is an HDMI interface and the target content is output to an external device connected to the HDMI interface, the HDMI interface of the external device is HDCP (High-bandwidth Digital Content Protection) Version 2.2 or later, the target content is output without the image quality restriction, and if the HDCP version of the HDMI interface of the external device is less than 2.2, the image quality restriction is performed. to output the target content. That is, depending on whether or not the interface that outputs the target content is equipped with a predetermined content protection technology, or if it is equipped with the content protection technology, depending on the version of the content protection technology. , whether or not to restrict the image quality of the target content may be controlled. If the resolution limit control flag does not indicate that the resolution limit control is to be performed in accordance with the interface specification, whether or not the image quality is limited may be controlled based on only the resolution limit bit. Similar processing may be performed for the frame rate limit control flag and the pixel resolution limit control flag.

In addition, the above-mentioned copy control information indicates copy restrictions such as "only one generation copy allowed", "predetermined number of copies allowed", "copy prohibited", etc., to an external device via the LAN communication unit 121. The copy process is possible only when the IP address of the external device, which is the destination of the transmission packet from the broadcast receiving device 100, is in the same subnet as the IP address of the broadcast receiving device 100, and the IP address of the external device is the same as that of the broadcast receiving device 100. If it is outside the same subnet as the IP address of the receiving device 100, it may be prohibited. Contents whose copy control information is ``Unrestricted copying is permitted and encryption processing is required at the time of storage and output'' may be handled in the same manner.

Similarly, content for which the above-mentioned copy control information indicates copy restrictions, such as "one generation copy only", "predetermined number of copies allowed", "unlimited copy allowed and encryption processing required for storage and output" Once stored in the storage (accumulation) unit 110, the move processing or copy processing to the external device via the LAN communication unit 121 also involves the IP This is possible only when the address is within the same subnet as the IP address of the broadcast receiving apparatus 100, and may be prohibited when the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving apparatus 100.

Also, in principle, viewing video output and audio output for content stored in the storage (accumulation) unit 110 of the broadcast receiving device 100 is performed when the IP address of the external device, which is the destination of the transmission packet from the broadcast receiving device 100, is It is possible only when it is in the same subnet as the IP address of the broadcast receiver 100, and is prohibited when the IP address of the external device is outside the same subnet as the IP address of the broadcast receiver 100. However, the external device is connected within a predetermined period within the same subnet as the IP address of the broadcast receiving device 100 and 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 (paired) device, even if the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving device 100, storage (accumulation) of the broadcast receiving device 100 in the external device ) section 110 may be configured to enable viewing video output and audio output for the content stored in the section 110 . In this case, the viewing video output and audio output are performed by encrypting the contents.

However, the encryption process may be controlled according to the value of the "encryption_mode" parameter of the content usage control descriptor shown in FIG. That is, when the value of the "encryption_mode" parameter indicates that output protection of the IP interface output is required, the encryption process is performed, and when it indicates that output protection of the IP interface output is not required. , the video output for viewing and the audio output may be performed without performing the encryption processing. Further, when the value of the "encryption_mode" parameter indicates that output protection of the IP interface output is required, encryption processing is performed by using part or all of the "reserved_future_use" parameter of the content usage control descriptor. Alternatively, the range of IP addresses of the external devices capable of outputting the video and audio for viewing may be specified without applying the That is, for a predetermined IP address, even if the IP address is not in the same subnet as the IP address of the broadcast receiving apparatus 100, it is possible to perform viewing video output and audio output.

Also, a period during which the registration process (pairing) is valid may be specified by using part or all of the "reserved_future_use" parameter of the content usage control descriptor. In this case, if the date and time when the registration process (pairing) of the external device is executed is within the specified period, even if the external device is outside the same subnet as the IP address of the broadcast receiving apparatus 100, the external device Control may be performed so that viewing video output and audio output to the device are permitted, and are not permitted outside the specified period.

Further, the above-described moving processing, copying processing, output processing, etc. of content to an external device via the LAN communication unit 121 may be controlled according to the value of the "remote_view_mode" parameter of the content usage control descriptor. . That is, when the value of the "remote_view_mode" parameter does not allow remote viewing of the target content, all processing such as move processing, copy processing, and output processing of the content to an external device via the LAN communication unit 121 is performed. You may control so that it may be prohibited.

According to the processing described above, appropriate content protection can be achieved even when the content is output to an external device.

<Exception processing 1 of content copy control>
In the data structure of the content copy control descriptor shown in FIG. 22A, the first digital copy control information (“digital_recording_control_data” parameter located immediately after “descriptor_length”) is copy generation control information regarding the entire content. The second digital copy control information (“digital_recording_control_data” parameter located immediately after “component_tag”) is copy generation control information relating to each component constituting the content. It should be noted that each component is designated by the "component_tag" parameter.

In the broadcasting system of the present embodiment, when controlling the copy generation of the entire content (program), only the first digital copy control information is described in the content copy control descriptor, and the first digital copy control information is described in the content copy control descriptor. The copy generation is controlled by control information. On the other hand, when controlling the copy generation for each component constituting the content, both the first digital copy control information and the second digital copy control information are described in the content copy control descriptor, Control copy generation. Furthermore, when copy generation control is performed for each component constituting the content, the descriptions of the first digital copy control information and the second digital copy control information described in the content copy control descriptor do not match. situation can be considered. In the above-described situation, the broadcast receiving apparatus 100 of this embodiment should perform the following operations.

First, in the first operation example, when the descriptions of the first digital copy control information and the description of the second digital copy control information do not match, the copy generation control indicated in the first digital copy control information is executed. It is a method of controlling to operate based on In this case, simple copy generation control common to each component constituting the same content is possible.

Next, in a second operation example, when the descriptions of the first digital copy control information and the description of the second digital copy control information do not match, the copy generation indicated in the second digital copy control information is It is a method of controlling to operate based on the control. In this case, it is possible to perform different copy generation control for each component even if the components constitute the same content, that is, more precise copy generation control is possible.

Furthermore, in the third operation example, if the descriptions of the first digital copy control information and the descriptions of the second digital copy control information do not match, the stricter condition of the two different digital copy control information is set. This is a method of performing control so as to operate based on digital copy control information. For example, if one is "unlimited copying" and the other is "copying only one generation", the information "copying one generation only" is followed. Alternatively, if one is "copyable a predetermined number of times" and the other is "copying prohibited", the "copying prohibited" information is followed. Alternatively, if both are "copyable a predetermined number of times", the separately specified information with the smaller number of copies is followed. In this case, stricter copy generation control becomes possible.

By performing the above processing, the broadcast receiving apparatus 100 of the present embodiment can preferably operate even when two different pieces of digital copy control information are written in the content copy control descriptor.

<Exception processing 2 of content copy control>
As described with reference to FIG. 7A, in the digital broadcasting system to which the broadcast receiving apparatus 100 of the present embodiment is compatible, the location information in the MPT (see FIG. 7C) indicates that the data acquired in the TLV stream of the broadcast path and a different path Data acquired by (IPv4, IPv6, MPEG2-TS, URL, etc.) may be included in the same package and in the same event as data acquired by TLV stream, but at this time copy control information is included in MPT etc. Describe content protection when

First, when copy control information is included in MPT etc., the data included in the same package and the same event in the location information is a path different from the data acquired in the TLV stream of the broadcast path (IPv4, IPv6, MPEG2-TS, URL, etc.) may be controlled according to the copy control information included in the TLV stream. As described above, the copy control statuses of the content specified by these pieces of copy control information include "unlimited copying" ("unlimited copying and encryption processing required at storage and output" and "unlimited copying"). and no encryption processing is required at the time of storage and output”), “only one generation can be copied”, and “predetermined number of copies are allowed” (for example, if nine copies are allowed + one move is allowed, the so-called “ Dubbing 10”), “copy prohibition”, 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 is also associated with the copy control information of the other digital broadcasting signal. are being broadcast. Then, according to which information and how to perform copy control of the MPEG2-TS data (whether according to the copy control information included in the TLV/MMT stream or according to the copy control information included in MPEG2-TS) becomes a problem. .

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

<Operation example 1>
In the first operation example, when copy control information is included in MPT or the like, and data included in the same package and in the same event as location information includes MPEG2-TS data transmitted by another digital broadcasting signal, MPEG2 - Prioritize the copy control state indicated by the copy control information included in the TLV stream over the copy control state indicated by the copy control information included in the TS.

For example, the copy control status indicated by the copy control information included in the TLV stream is "one generation copy allowed", and the copy control status indicated by the copy control information included in the MPEG2-TS is "predetermined multiple copies allowed". If so, even if the data is acquired through a route (digital broadcasting in MPEG2-TS transmission format) different from that acquired through the TLV stream, copy control may be performed as the content of "1st generation copy permitted". For example, the copy control status indicated by the copy control information included in the TLV stream is "unlimited copying allowed", and the copy control status indicated by the copy control information included in the MPEG2-TS is "predetermined multiple copies allowed". If so, even if the data is acquired through a route (digital broadcasting in MPEG2-TS transmission format) different from that acquired through the TLV stream, copy control may be performed as "unlimited copying" content.

In the case of this operation, it is possible to put the data acquired through a path other than the TLV stream into a copy state desired to be managed in the broadcasting system supported by the broadcast receiving apparatus 100 of the present embodiment.

<Operation example 2>
In the second operation example, when copy control information is included in MPT or the like, and data included in the same package and the same event as location information includes MPEG2-TS data transmitted by another digital broadcasting signal, TLV The copy control state indicated by the copy control information included in the stream 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 to the storage (accumulation) unit 110 or the like, recording processing to a removable recording medium, or output processing from the digital interface is performed. When doing so, the MPEG2-TS data is excluded from the contents to be processed.

In the case of this operation, for data acquired through a route other than the TLV stream, while respecting the original copy control information set in the broadcasting system that transmits the data, the broadcast receiving apparatus 100 of the present embodiment copies 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 state as the copy control state indicated by the copy control information included in the TLV stream or is in a looser copy control state In other words, MPEG2-TS data included in the same package and in the same event with the location information may be copy-controlled as content in the copy-controlled state indicated by the copy control information included in the TLV stream.

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

In the above explanation, the copyright protection function of the broadcast receiving apparatus 100 of this embodiment is explained 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 the MPT, the MH-service description table (MH-SDT) and MH-event information table (MH-EIT) described in FIG. 6B, or other tables are placed and transmitted, and the broadcast receiving apparatus 100 follows these tables. Copyright protection processing may be performed.

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

(Example 2)
A second embodiment of the present invention will be described below. It should be noted that the configuration, processing, effects, etc. of this embodiment are the same as those of the first embodiment unless otherwise specified. Therefore, the differences between the present embodiment and the first embodiment will be mainly described below, and descriptions of common points will be omitted as much as possible to avoid duplication. Also, the broadcast receiving apparatus of this embodiment will be described below assuming that it is a television receiver compatible with both the MMT system and the MPEG2-TS system as media transport systems.

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

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

The first tuner/demodulator 831 receives broadcast waves of a broadcast service adopting 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 (tune) to the channel of Furthermore, the first tuner/demodulator 831 demodulates the received broadcast signal to obtain an MMT data string, and outputs it to the MMT decoding processor 841 . The second tuner/demodulator 832 receives broadcast waves of a broadcast service that employs MPEG2-TS as a media transport method via an antenna (not shown), and, based on the control of the main control unit 801, reproduces the signals desired by the user. Tune in (tune) to the channel of the service you want. Furthermore, the second tuner/demodulator 832 demodulates the received broadcast signal to acquire an MPEG2-TS data string and outputs it to the MPEG2-TS decoding processor 842 .

The MMT decoding processing unit 841 receives the MMT data string output from the first tuner/demodulation unit 831, and converts video data string, audio data string, Separation processing of superimposed text data string, caption data string, etc., decoding processing, etc. are performed. The MMT decoding processing unit 841 includes the separation unit 132, the video decoder 141, the video color gamut conversion unit 142, the audio decoder 143, the text super decoder 144, the subtitle decoder 145, the subtitle synthesizing unit 146, Functions corresponding to the subtitle color gamut conversion unit 147, the data decoder 151, the cache unit 152, the application control unit 153, the browser unit 154, the application color gamut conversion unit 155, the sound source unit 156, and the like are provided. The MMT decoding processing unit 841 can perform various types of processing described in the first embodiment. The details of the various processes are the same as those described in the first embodiment, so descriptions thereof will be omitted.

The MPEG2-TS decoding processing unit 842 receives the MPEG2-TS data string output from the second tuner/demodulation unit 832, and converts video data, which is a real-time presentation element, based on the control signal included in the MPEG2-TS data string. It performs separation processing, decoding processing, and the like for strings, audio data strings, superimposed character data strings, subtitle data strings, and the like. 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 broadcasting services that employ MPEG2-TS as a media transport method. Detailed description is omitted.

The video synthesizing unit 861 receives the video information, subtitle information, and application information output from the MMT decoding processing unit 841, and the video information, subtitle information, and application information output from the MPEG2-TS decoding processing unit 842, Processing such as selection and/or superimposition is performed as appropriate. The video synthesizing unit 861 includes a video RAM (not shown), and the monitor unit 862 and the like are driven based on the video information and the like input to the video RAM. Also, the video synthesizing unit 861 performs scaling processing, EPG screen information superimposing processing, etc., as necessary, based on the control of the main control unit 801 . The audio synthesizing unit 164 receives 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 on the Internet 200 and other communication devices. Also, it obtains an MMT data string (or a part thereof) or an MPEG2-TS data string (or a part thereof) of a program transmitted via a communication line, Output to the decoding processing unit 842 .

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

Generally, when the video synthesizing unit 861 mainly selects the video information output from the MMT decoding processing unit 841, the information about the current date and the current time obtained from the MH-TOT is When superimposed on video information and the like, and when the video synthesizing unit 861 mainly selects the video information and the like output from the MPEG2-TS decoding processing unit 842, the information on the current date and the current time obtained from the TOT is Control may be performed so as to be superimposed on video information or the like.

However, there are differences in encoding/decoding processes and transmission paths between broadcasting services that use MMT as a media transport method and broadcasting services that use MPEG2-TS as a media transport method. , there is a possibility that inconsistency may occur between the selection of a broadcasting service that employs MMT as the media transport scheme and the selection of a broadcasting service that employs MPEG2-TS as the media transport scheme. For example, as shown in FIG. 25, an EPG screen 162g displaying channel information of a broadcasting service adopting MMT as a media transport method is changed to an EPG screen 162g displaying channel information of a broadcasting service adopting MPEG2-TS as a media transport method. When the screen display is switched to the screen 162h, the inconsistency caused by the switching of the display of the current time from the current time display 162g1 to the current time display 162h1 may cause a visual discomfort to the user.

In the broadcast receiving apparatus 800 of the present embodiment, even when the video synthesizing unit 861 mainly selects the video information or the like output from the MMT decoding processing unit 841, in order to prevent the user's visual discomfort. , the information relating to the current date and the current time obtained from the TOT is superimposed on the video information or the like. That is, control is performed to superimpose the current time information provided by the broadcasting service adopting MPEG2-TS as the media transport method on the contents of the broadcasting service adopting MMT as the media transport method.

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 adopting MMT as a media transport method and a broadcasting service adopting MPEG2-TS as a media transport method, the user will feel a visual discomfort due to inconsistency in the display of the current time. It is possible to prevent

FIG. 26A 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. In the broadcast receiving apparatus 800 of the present embodiment, when it is possible to receive a broadcast service adopting MPEG2-TS as a media transport method, the TOT is always referenced to acquire the current time information. , the MH-TOT only when reception of broadcast services adopting MPEG2-TS as a media transport method is disabled and reception of broadcast services adopting MMT as a media transport method is possible. to get the current time information.

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

As described above, when controlling to superimpose the current time information provided by the broadcasting service adopting MPEG2-TS as the media transport method on the content of the broadcasting service adopting MMT as the media transport method. and control to superimpose the current time information provided by the broadcasting service adopting MMT as the media transport method on the contents of the broadcasting service adopting MPEG2-TS as the media transport method. , the current time information can be corrected by referring to the "delta" parameter of the time information in the TMCC extension information area, in the same manner as described in [Time management of broadcast receiving device] in Embodiment 1. It is possible.

Also, in both cases of broadcasting services adopting MMT as a media transport method and broadcasting services adopting MPEG2-TS as a media transport method, MH-TOT or TOT transmitted by each broadcasting service constituting the network is It is conceivable that there may be an error due to a malfunction of the transmission side system or a transmission error. In the broadcast receiving apparatus 800 of the present embodiment, as a countermeasure against the MH-TOT or the TOT error, when it is determined that the MH-TOT or the TOT acquired from the service being received has an error, other than the same network MH-TOT or TOT from the broadcasting service of another network or from any broadcasting service of another network, and refer to the current time information to update the time information of the built-in clock. and

FIG. 26B shows an example of update processing of the current time information when receiving a broadcast service adopting MPEG2-TS as the media transport method in the broadcast receiving apparatus 800 of this embodiment. It should be noted that even when receiving a broadcast service that employs MMT as a media transport method, processing similar to that shown in the figure is possible.

When updating the time information of the built-in clock in the broadcast receiving apparatus 800 of the present embodiment, first, the receiving function execution unit 1102 receives MPEG2 - Acquire the TOT from the TS data string (S301), and acquire current time information by referring to the acquired TOT (S302). Next, the reception function execution unit 1102 performs processing for comparing the current time information acquired in the processing of S302 and the time information of the built-in clock.

As a result of the comparison process, if the difference between the current time information acquired in the process of S302 and the time information of the internal clock is within a predetermined value (for example, within 3 minutes) (S303: Yes), the reception function execution unit 1102 The time information of the built-in clock is updated using the current time information acquired in the process of S302 (S306). On the other hand, as a result of the comparison processing, if the difference between the current time information acquired in the processing of S302 and the time information of the internal clock is not within a predetermined value (S303: No), or if the TOT acquired in S301 is included in the data If there is a flag or the like indicating that there is an error, the reception function execution unit 1102 acquires the TOT from the MPEG2-TS data string of another broadcast service in the same network, or obtains the TOT from any other network. MH-TOT is acquired from the MMT data string of a broadcast service (broadcast service adopting MMT as a media transport method) (S304), and current time information is acquired from the acquired TOT or MH-TOT (S305). . The reception function execution unit 1102 may perform the comparison process of S303 again using the current time information acquired in the process of S305.

By the above processing, the broadcast receiving apparatus 800 of the present embodiment determines that the MH-TOT or TOT acquired from the service being received has an error, from another broadcast service on the same network, or from another broadcast service. By obtaining the MH-TOT or TOT from any broadcast service on the network and referring to the current time information, it is possible to update the time information of the built-in clock.

If it is not possible to acquire the current time information within a predetermined range from the time information of the built-in clock by repeating the processing of S304 to S305, such as during initial setting after shipment from the factory, the current time information is acquired by the processing of S302. The time information of the built-in clock may be set again using the current time information. By doing so, it is possible to cope with the case where there is an error in the time information side of the built-in clock of the broadcast receiving apparatus 800 of this embodiment.

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

However, the broadcast receiving apparatus 800 of the present embodiment can display video information and the like provided by a broadcasting service that employs MMT as a media transport method, or even when MPEG2-TS is used as a media transport method. Both the MH-EIT and the EIT can be acquired even when displaying video information provided by a broadcasting service employing .

FIG. 27A shows an example of an EPG screen in broadcast receiving apparatus 800 of this embodiment. In the figure, an EPG screen 162i is an EPG screen created based on MH-EIT of a broadcasting service adopting MMT as a media transport method, and includes "M1 TV", "M2 Broadcast", "M3 Channel", "M4 TV , “Television M5”, etc. are the names of broadcasting stations of broadcasting services that employ MMT as a media transport method. The EPG screen 162j is an EPG screen created based on the EIT of a broadcasting service that employs MPEG2-TS as a media transport method, and includes "T6 TV", "T7 Broadcast", "T8 Channel", and "T9 TV". , “Television TA” and the like are the names of broadcasting stations of broadcasting services that employ MPEG2-TS as the media transport method.

For example, while a user is watching a broadcast program provided by a broadcasting service that employs MMT as a media transport method, if a remote controller (not shown) is operated to instruct display of an EPG screen, an initial screen (shown in the figure) of the EPG screen is displayed. omitted) is displayed. The initial screen of the EPG screen is an EPG screen created based on MH-EIT of a broadcasting service adopting MMT as a media transport method. (neighborhood of current time)” is displayed. Next, the user desires to check the detailed information of the broadcast program of each channel on "October 9, 2014" from "20:00", and instructs to update the EPG screen by operating the remote controller (not shown). Then, the EPG screen 162i is displayed.

Furthermore, when the user desires to check detailed information about broadcast programs provided by a broadcasting service that employs MPEG2-TS as a media transport method, and instructs network switching by operating a remote controller (not shown), EPG Screen 162j is displayed. At this time, in the broadcast receiving apparatus 800 of the present embodiment, the initial screen of the EPG screen created based on the EIT of the broadcast service adopting MPEG2-TS as the media transport method (that is, "October 7, 2014 (detailed information of the broadcast program of each channel from "17 o'clock"), but the same day and time zone as the EPG screen 162i displayed immediately before (that is, "from 20 o'clock ]) to display the detailed information of the broadcast program of each channel.

With the above-described control, the user can continuously confirm detailed information about broadcast programs on the same day and at the same time on a plurality of networks with different media transport methods with a simple operation. That is, the usability of the broadcast receiving apparatus 800 is improved.

FIG. 27B is a diagram showing a different example of the EPG screen in broadcast receiving apparatus 800 of this embodiment. The EPG screen 162k shows a state in which the EPG screen 162i shown in FIG. 27A is displayed and 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 adopting MMT as a media transport method can be displayed. The channel information created based on the EIT of the broadcasting service adopting MPEG2-TS as the transport method is seamlessly displayed on the same time axis.

Therefore, while the user confirms the channel information created based on the MH-EIT of the broadcasting service adopting MMT as the media transport method, the channel information created based on the EIT of the broadcasting service using MPEG2-TS as the media transport method is Even when the user desires to check the received channel information, it is possible to eliminate the need for instructing network switching by operating a remote controller (not shown). Furthermore, the user can simultaneously confirm detailed information about broadcast programs on the same day and at the same time on a plurality of networks with different media transport methods. That is, the usability of the broadcast receiving apparatus 800 is improved.

(Example 3)
A third embodiment of the present invention will be described below. It should be noted that the configuration, processing, effects, etc. of this embodiment are the same as those of the first embodiment unless otherwise specified. Therefore, the differences between the present embodiment and the first embodiment will be mainly described below, and descriptions of common points will be omitted as much as possible to avoid duplication.

Embodiment 3 of the present invention has the same hardware configuration as the broadcast receiver 100 in Embodiment 1, and performs control for realizing a different copyright protection function. It should be noted that what will be described in this embodiment is the content protection control for video among the contents, and for audio, the same control as in the following description may be performed, or a different content protection control may be performed. .

FIG. 28 is a table summarizing processing of the copyright protection function in the broadcast receiving apparatus 100 of the third embodiment. In the broadcast receiving apparatus 100 of the third embodiment, the received content is 2K content (pixel number exceeding 1920×1080) such as 4K content (pixel number 3840×2160) or 8K content (pixel number 7680×4320). content) or content of 2K or less (content having pixels of 1920×1080 or less), the copyright protection processing for the content before and after the content storage processing is switched.

Specifically, parameters included in the content copy control descriptor described with reference to FIGS. ] parameter) is switched as shown in FIG. Also, in the broadcast receiving apparatus 100 of the third embodiment of the present invention, the "image_constraint_token" parameter is substantially invalidated in the content usage control descriptor shown in FIG. That is, the broadcast receiving apparatus 100 according to the third embodiment may determine that the resolution of the video signal output is not limited regardless of what value is entered in the "image_constraint_token" parameter. That is, the concept of copyright protection of the broadcast receiving apparatus 100 of the third embodiment does not impose restrictions on the resolution of the video signal output for the user according to the "image_constraint_token" parameter, but according to the table of FIG. Appropriate content protection is performed according to the state of the number of pixels before and after accumulation processing.

In the table of FIG. 28, based on the accumulation process, which is a process of recording the received content in the storage unit 110 of FIG. The pre-processing and the post-accumulation processing performed after accumulation are explained separately. First, the pre-accumulation process will be described. In this embodiment, when the expression "before storage" of the content is used, the content does not necessarily need to be stored afterwards. It has both the meaning of ``the state before actually storing the content'' and the meaning of ``without storing the content''.

[Contents when receiving]
Since the broadcast receiver 100 according to the third embodiment receives content in the MMT transmission method, all the transmission methods in the example of FIG. 28 are the MMT transmission method. Here, the content at the time of receiving the content includes 4K content (3840 x 2160 pixels), 8K content (7680 x 4320 pixels), and more than 2K content (content with more than 1920 x 1080 pixels). ), and there are also cases of content of 2K or less (content of 1920×1080 pixels or less).

Broadcast receiver 100 may use data transmitted by the MMT method to determine whether the received content is over 2K content or 2K or less content. Specifically, the pixel number information included in the header of the content video encoded stream (for example, H.265/HEVC encoded stream) may be used, and the video component descriptor of FIG. Pixel number information stored in the included "video_resolution" may be used. The determination may be made using any data transmitted by the MMT method.

[Pixel number conversion processing after content reception and before storage]
The broadcast receiver 100 of the third embodiment has a pixel number conversion unit (not shown) that converts the number of pixels of a video either before or after the video synthesizing unit in FIG. 8A. Make it executable. As shown in the table of FIG. 28, when the received over 2K content (content with a pixel count exceeding 1920×1080 pixels) is not subjected to pixel count conversion, the pixel count is converted to other over 2K content. In the case of conversion into content, pixel number conversion may be performed to convert to content of 2K or less (content of pixel number of 1920×1080 or less). Further, as shown in the table of FIG. 28, for the received content of 2K or less (content of 1920×1080 pixels or less), the case where the pixel count conversion is not performed or the content of 2K or less after the pixel count conversion is performed. (Content with 1920×1080 pixels or less) may be converted.

[Processing for output to external device after content reception and before storage]
In the broadcast receiver 100 according to the third embodiment, after receiving the content, when outputting the content before storage to an external device, the protection processing of the content is switched according to the state of the number of pixels of the content. Specifically, whether the number of pixels of the content when outputting the content to the external device after receiving the content and before accumulating it exceeds 1920×1080 pixels or is 1920×1080 pixels or less. , to change the content protection process accordingly. 22A and 22B (for example, the "digital_recording_control_data" parameter) included in the content copy control descriptor described with reference to FIGS. 22A and 22B. It is to change the interpretation of parameters (for example, the 'encryption_mode' parameter) and switch the content protection processing performed on these parameters.

A specific example of output processing to an external device after content reception and before storage shown in FIG. 28 will be described below. The output processing to the external device is applied to the video output processing when the video decoded by the video decoder 141 in FIG. 8A or the video obtained by converting the decoded video by the pixel number conversion unit is output from the video output unit 163 to the external device. do it. As another example, the video output may be performed via an IP interface having the LAN communication unit 121 of FIG. 8A as hardware.

(1-1) When content exceeding 2K (content with a pixel count exceeding 1920 x 1080 pixels) is output to an external device without performing pixel count conversion on reception, or when pixel count conversion is performed and other When outputting to an external device after converting to content exceeding 2K pixels (content with a pixel count exceeding 1920 x 1080 pixels)

In this case, the value of "encryption_mode" of the content usage control descriptor is not taken into consideration for content output protection. When "digital_recording_control_data" of the content copy control descriptor is 00, the content is output without being protected by HDCP. When "digital_recording_control_data" of the content copy control descriptor is 10, the content is output with advanced content protection of HDCP Revision 2.2 or later. When "digital_recording_control_data" of the content copy control descriptor is 01, the output itself is prohibited. When "digital_recording_control_data" of the content copy control descriptor is 11, the content is output after applying advanced content protection of HDCP Revision 2.2 or later. If the content copy control descriptor of the received content is not included in the received data for some reason, the content is output without being protected by HDCP.

When outputting to an external device before storage, content protection processing for interpreting the "digital_recording_control_data" parameter included in the content copy control descriptor and the parameter "encryption_mode" included in the content usage control descriptor as described above will be described below. This is referred to as the previous “over 2K content protection process” when outputting to an external device.

(1-2) At the time of reception, pixel count conversion is performed on content exceeding 2K (content with a pixel count exceeding 1920 x 1080 pixels) to convert to 2K or less content (content with a pixel count of 1920 x 1080 or less). and output to an external device

If 'digital_recording_control_data' of the content copy control descriptor is 00 or if the content copy control descriptor of the received content is not included in the received data for some reason, according to the value of 'encryption_mode' of the content usage control descriptor , to switch whether or not to protect the content during output. At this time, if the "encryption_mode" value of the content usage control descriptor is 1 and content protection is not specified, the content can be output without being protected by HDCP. When the "encryption_mode" value of the content usage control descriptor is 0 and content protection is specified, the content is protected by HDCP Revision 1 or Revision 2 or later and output.

Also, when the "digital_recording_control_data" of the content copy control descriptor is 10, regardless of the "encryption_mode" value of the content usage control descriptor, the data is output after being protected by HDCP Revision 1 or Revision 2 or later. When "digital_recording_control_data" of the content copy control descriptor is 01, the output itself is prohibited regardless of the "encryption_mode" value of the content usage control descriptor. When 'digital_recording_control_data' of the content copy control descriptor is 11, regardless of the 'encryption_mode' value of the content usage control descriptor, the data is output after being protected by HDCP Revision 1 or Revision 2 or later. If the content copy control descriptor of the received content is not included in the received data for some reason, the content is output without being protected by HDCP.

When outputting to an external device before storage, content protection processing for interpreting the "digital_recording_control_data" parameter included in the content copy control descriptor and the parameter "encryption_mode" included in the content usage control descriptor as described above will be described below. This is referred to as the previous “2K or less content protection processing” when outputting to an external device.

(1-3) When outputting content of 2K or less (content of pixels of 1920×1080 or less) to an external device without performing pixel count conversion at the time of reception, or performing pixel count conversion of other content of 2K or less (pixel (1920 x 1080 or less content) and output to an external device

In this case, the “2K or less content protection process” at the time of outputting to an external device before storage described in (1-2) is performed.

As described in (1-1), (1-2), and (1-3) above, when outputting to an external device before accumulation, the number of pixels of the content when outputting to the external device before accumulation is Accordingly, the interpretation of the "digital_recording_control_data" parameter included in the content copy control descriptor and the parameter "encryption_mode" included in the content usage control descriptor is switched, and copy-restricted content exceeding 2K (pixel count exceeding 1920 x 1080 pixels When outputting to an external device in the state of 2K or less content with copy restrictions (content with a pixel count of 1920 x 1080 or less), more advanced content protection is applied than when outputting to an external device in the state of output. As a result, more value-added content exceeding 2K (content having a pixel count exceeding 1920×1080 pixels) can be appropriately protected even in an external device.

[Content protection processing when storing content]
In the broadcast receiver 100 according to the third embodiment, it has already been explained that, in output processing to an external device after content reception and before storage, content protection processing is switched according to the state of the number of pixels of the content. This is because the reproduction device that reproduces the content at the output destination is an external device, and the level of support for content protection processing may differ depending on the device.

On the other hand, if content is stored by a content storage function that can be reproduced only by the broadcast receiver 100 that received and recorded the content, it is not necessary to change the processing according to the state of the number of pixels of the content. be. This is because the content is originally managed only by the broadcast receiver 100 itself, so there is no need to consider multiple levels of content protection processing. Therefore, in order to simplify the management within the broadcast receiver 100, when accumulating content using a content accumulation function that can be reproduced only by the broadcast receiver 100 that received and recorded the content, It is desirable to perform a common storage protection process for over 2K content (content with a pixel count exceeding 1920×1080 pixels) and 2K or less content (content with a pixel count of 1920×1080 or less). It should be noted that the content accumulation process may be performed, for example, on the storage unit 110 (FIG. 8A), which is a recording medium built into the broadcast receiver 100 of the third embodiment. However, if local encryption processing specific to the broadcast receiver 100 is performed and management is performed so that playback can only be performed by the broadcast receiver 100, the data may be stored on a recording medium such as an external hard disk.

In the content storage process shown in FIG. 28, content exceeding 2K (content with a pixel count exceeding 1920×1080 pixels) is received without conversion of the number of pixels, and content exceeding 2K (pixel count) is received. content having a number of pixels exceeding 1920 x 1080), and converted to other content with a number of pixels exceeding 2K (content having a number of pixels exceeding 1920 x 1080); When receiving content that exceeds 2K (content with a pixel count exceeding 1920 x 1080), the pixel count is converted to 2K or less content (content with a pixel count of 1920 x 1080 or less). 2K or less content (content with 1920 x 1080 pixels or less) was not subjected to pixel count conversion, and content of 2K or less (content with 1920 x 1080 or less pixels) was subjected to pixel count conversion at the time of reception. The following common storage protection processing is performed in any case of content converted into content of 2K or less (content of 1920×1080 pixels or less).

Here, the ``common storage protection processing'' means that the interpretation processing of the ``digital_recording_control_data'' parameter included in the content copy control descriptor, the parameter ``encryption_mode'' parameter included in the content usage control descriptor, and other parameters is performed at the time of storage. It means that content exceeding 2K (content having a pixel count exceeding 1920×1080 pixels) and content of 2K or less (content having a pixel count of 1920×1080 or less) are common.

A specific example of the "common storage protection processing" of the content storage processing shown in FIG. 28 will be described below.

First, when the value of the 'digital_recording_control_data' parameter included in the content copy control descriptor is 00 and 'copyable without restrictions', storage can be performed without restrictions on copying. The copy control information on the recording medium at the time of storage, which manages the content stored on the recording medium, may be stored as "copyable without restrictions". Note that the copy control information on the recording medium used for copy control of the stored content may be generated and managed separately from the value of the "digital_recording_control_data" parameter included in the content copy control descriptor. There is no need to rewrite the value of the "digital_recording_control_data" parameter contained in the child.

In this case, the value of the "encryption_mode" parameter included in the content usage control descriptor is taken into consideration. Local encryption processing unique to the broadcast receiver 100 is applied to store the data so that it cannot be reproduced. If the value of the "encryption_mode" parameter included in the content usage control descriptor is 0 and content protection is not specified, the local encryption process does not have to be performed (however, in this case, the local encryption process may be applied). While the content is stored as "copyable without restrictions", the content protection process does not change according to the number of pixels of the content until the external device output, external device copy, or external device move described later is performed. Perform common content protection processing. As a result, management within the broadcast receiver 100 can be simplified.

When the value of the 'digital_recording_control_data' parameter included in the content copy control descriptor is 10 and the 'copy_restriction_mode' parameter (see FIG. 23) included in the content usage control descriptor is 1, the content of 'copyable only for one generation' In the accumulation process, the copy control information on the recording medium at the time of accumulation for managing the content to be accumulated on the recording medium is accumulated as "repeat prohibited". Note that the copy control information on the recording medium used for copy control of the stored content may be generated and managed separately from the value of the "digital_recording_control_data" parameter included in the content copy control descriptor. There is no need to rewrite the value of the "digital_recording_control_data" parameter contained in the child. Note that when performing the storage processing with "repeat prohibited", local encryption processing unique to the broadcast receiver 100 is performed and stored so that it can only be reproduced by the broadcast receiver 100. FIG. Copy processing is prohibited for content that is being stored as "re-copy prohibited". While the content is stored with "recopy prohibited", the content protection process does not change according to the number of pixels of the content, until the external device output or external device move is performed as "recopy prohibited", which will be described later. Perform common content protection processing. As a result, management within the broadcast receiver 100 can be simplified.

If the value of the 'digital_recording_control_data' parameter included in the content copy control descriptor is 10 and the 'copy_restriction_mode' parameter included in the content usage control descriptor is 0, then the content is interpreted as 'copyable with a limited number of copies' and stored. In , the copy control information on the recording medium at the time of storage that manages the content stored on the recording medium can be stored as "copyable with limited number". Note that the copy control information on the recording medium used for copy control of the stored content may be generated and managed separately from the value of the "digital_recording_control_data" parameter included in the content copy control descriptor. There is no need to rewrite the value of the "digital_recording_control_data" parameter contained in the child. Note that when performing the storage processing with "number-limited copying allowed", local encryption processing specific to the broadcast receiver 100 is performed and stored so that only the broadcast receiver 100 can reproduce it. While content is stored as "copyable with limited number", content is protected according to the number of pixels of the content until it is output to an external device, copied to an external device, or moved to an external device as "recopy prohibited" described later. Common content protection processing is performed without changing the processing. As a result, management within the broadcast receiver 100 can be simplified.

When the value of the "digital_recording_control_data" parameter included in the content copy control descriptor is 11, it is interpreted as "copy prohibited" content. In this case, if the broadcast receiver 100 supports the "temporary storage" function, temporary storage is possible. , accumulation is prohibited and accumulation processing is not performed. When the broadcast receiver 100 supports the "temporary storage" function, in the storage process, the copy control information on the recording medium at the time of storage for managing the content to be stored on the recording medium is set as "temporary storage". It is possible to accumulate contents for a certain period of time (for example, 1 hour and 30 minutes). In this case, the accumulation time must be managed in units of one minute, and the reproduction of the accumulated content must be disabled before the predetermined time plus one minute elapses from the time of reception (=start of accumulation). Specific examples of disabling content reproduction include erasing the content itself, erasing the encryption key, and the like. Copy processing and move processing are prohibited for content that is being stored as "temporary storage". Common content protection without changing the content protection processing according to the number of pixels of the content while the content is being stored with "Recopy prohibited" until output to an external device as "Recopy prohibited" described later. process. As a result, management within the broadcast receiver 100 can be simplified.

As described above, when accumulating content, the "digital_recording_control_data" parameter included in the content copy control descriptor and the parameter "encryption_mode" included in the content usage control descriptor are set according to the number of pixels of the content at the time of storage. Content protection processing is standardized without switching interpretations. As a result, management within the broadcast receiver 100 can be simplified.

[Pixel number conversion processing after content storage]
The broadcast receiver 100 of the third embodiment has a pixel number conversion unit (not shown) that converts the number of pixels of a video either before or after the video synthesis unit in FIG. , the video decoder 141 decodes the video data and converts the number of pixels of the video. Make it executable.

As shown in the table of FIG. 28, received over 2K content (content with a pixel count exceeding 1920×1080 pixels) is accumulated without pixel count conversion (1920×1080 pixels). content with a number of pixels exceeding 1920 x 1080) or the received content with a number of pixels exceeding 1920 x 1080) is converted into other content with a number of pixels exceeding 1920 x 1080 For content exceeding 2K (content with a number of pixels exceeding 1920 x 1080) that has been converted to 2K content (content with a number of pixels) and stored, even if the number of pixels is not converted when outputting, moving, or copying after storage be. In this case, content to be output, moved, or copied is content exceeding 2K (content having a pixel count exceeding 1920×1080 pixels).

In addition, over 2K content (content with a pixel count exceeding 1920 x 1080) stored without performing pixel count conversion on the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) Or perform pixel number conversion on the received over 2K content (content with a pixel count exceeding 1920 x 1080) and convert it to other over 2K content (content with a pixel count exceeding 1920 x 1080) When converting over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) that has been accumulated to other over 2K content by converting the number of pixels when outputting, moving, or copying after accumulation There is also In this case, content to be output, moved, or copied is content exceeding 2K (content having a pixel count exceeding 1920×1080 pixels).

In addition, over 2K content (content with a pixel count exceeding 1920 x 1080) stored without performing pixel count conversion on the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) Or perform pixel number conversion on the received over 2K content (content with a pixel count exceeding 1920 x 1080) and convert it to other over 2K content (content with a pixel count exceeding 1920 x 1080) For content over 2K (content with a pixel count exceeding 1920 x 1080 pixels) that has been stored as above, pixel count conversion is performed at the time of output, move, or copy after storage to convert content to 2K or less (content with a pixel count of 1920 x 1080 The following content) may be converted. In this case, content to be output, moved, or copied is content of 2K or less (content of pixels of 1920×1080 or less).

In addition, the received 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted into 2K content or less (content with a pixel count of 1920 x 1080 or less) and stored. In some cases, pixel number conversion is not performed for the following contents (contents with a number of pixels of 1920×1080 or less) at the time of output, move, or copy after accumulation. In this case, content to be output, moved, or copied is content of 2K or less (content of pixels of 1920×1080 or less).

In addition, the received 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted into 2K content or less (content with a pixel count of 1920 x 1080 or less) and stored. For the following content (content with 1920 x 1080 pixels or less), perform pixel count conversion at the time of output, move, or copy after accumulation to convert to other 2K or less content (content with 1920 x 1080 pixels or less). In some cases. In this case, content to be output, moved, or copied is content of 2K or less (content of pixels of 1920×1080 or less).

In addition, received content of 2K or less (content of pixels of 1920 x 1080 or less) accumulated without performing pixel count conversion, or received content of 2K or less (content of pixels of 1920 x 1080 or less) 2K or less content (1920 x 1080 or less pixel count content) converted to other 2K or less content (1920 x 1080 or less pixel count content) and accumulated Content) may not be subjected to pixel number conversion at the time of output, move, or copy after accumulation. In this case, content to be output, moved, or copied is content of 2K or less (content of pixels of 1920×1080 or less).

In addition, received content of 2K or less (content of pixels of 1920 x 1080 or less) accumulated without performing pixel count conversion, or received content of 2K or less (content of pixels of 1920 x 1080 or less) 2K or less content (1920 x 1080 or less pixel count content) converted to other 2K or less content (1920 x 1080 or less pixel count content) and accumulated Contents) may be converted into other contents of 2K or less (contents of 1920×1080 pixels or less) by converting the number of pixels when outputting, moving, or copying after accumulation. In this case, content to be output, moved, or copied is content of 2K or less (content of pixels of 1920×1080 or less).

[Output processing to external device after content storage]
It has already been explained that in the content storage process, the broadcast receiver 100 according to the third embodiment performs a common content protection process without switching the content protection process depending on the number of pixels of the content. This is because when content is stored by a content storage function that can be reproduced only by the broadcast receiver 100 that received and recorded the content, the content is originally managed only by the broadcast receiver 100 itself. This is because there is no need to consider multiple levels of protection processing. On the other hand, when the stored content is output to an external device, the corresponding level of content protection processing may differ depending on the playback device that plays back the content at the output destination. Therefore, it is desirable to vary the content protection process according to the number of pixels of the content when outputting the stored content to an external device.

A specific example of output processing to an external device after content accumulation shown in FIG. 28 will be described below. Output processing to the external device after the content is stored is the image of the content stored in the storage unit 110 in FIG. 163 to an external device. As another example, the video output may be performed via an IP interface having the LAN communication unit 121 of FIG. 8A as hardware.

(2-1) Over 2K content (content with a pixel count exceeding 1920 x 1080) stored without performing pixel count conversion on the received over 2K content (content with a pixel count exceeding 1920 x 1080) content) or the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) ) converted to 2K content (content with a number of pixels exceeding 1920 x 1080 pixels), when the number of pixels is not converted when outputting to an external device after storage.

In this case, the target content for external output is content exceeding 2K (content having a pixel count exceeding 1920×1080 pixels).

Content stored with the copy control information on the recording medium at the time of storage as "copyable without restrictions" can be output without content protection by HDCP when it is reproduced and output externally after storage. . At this time, it is not considered whether or not protection was designated by the value of the "encryption_mode" parameter included in the content usage control descriptor at the time of storage. This makes it possible to share the processing with the case where the content copy control descriptor "digital_recording_control_data" is 00 in (1-1) for external output of content before accumulation.

Content stored with the copy control information on the recording medium at the time of storage as "Recopy prohibited", Content stored with the copy control information on the recording medium at the time of storage with "Number of copies permitted", Content at the time of storage For content whose copy control information is stored as "temporary storage" on the recording medium, when the content is played back after storage and output to the outside, advanced content protection of HDCP Revision 2.2 or later is applied and output.

Content protected as described above according to the copy control information on the recording medium when outputting stored content to an external device as over 2K content (content with a pixel count exceeding 1920×1080 pixels). The protection process is hereinafter referred to as "2K content protection process" when outputting to an external device after storage.

(2-2) Over 2K content (content exceeding 1920 x 1080 pixels) stored without performing pixel count conversion on the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) content) or the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) ) and stored (content with a pixel count exceeding 1920 x 1080 pixels), the number of pixels is converted at the time of output to an external device after storage and converted to other over 2K content.

In this case, the target content for external output is over 2K content (content with a pixel count exceeding 1920×1080 pixels), which is the same as in (2-1) above, so in (2-1) The above-described “2K content protection processing” when outputting to an external device after accumulation is performed.

(2-3) Over 2K content (content exceeding 1920 x 1080 pixels) stored without converting the received over 2K content (content exceeding 1920 x 1080 pixels) content) or the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) ) converted to 2K content (content with a pixel count exceeding 1920 x 1080) is converted to 2K content (content with a pixel count of 1920 x 1080 When converting to the following content)

In this case, the content to be externally output is content of 2K or less (content of 1920×1080 pixels or less).

In this case, the content that is stored with the copy control information on the recording medium at the time of storage as "copyable without restrictions" is protected by the value of the "encryption_mode" parameter included in the content usage control descriptor at the time of storage. Switches the content protection processing considering whether is specified or not. Specifically, when the value of "encryption_mode" is 1 and content protection is not specified, the content can be output without HDCP-based content protection when it is reproduced and output after storage. When the value of "encryption_mode" is 0 and content protection is specified, when the content is reproduced after being stored and output to an external device, the content is output after being protected by HDCP Revision 1 or Revision 2 or later. This makes it possible to share the processing with the case where the content copy control descriptor "digital_recording_control_data" is 00 in (1-2) above for the external output of the content before storage.

In addition, content stored with the copy control information on the recording medium at the time of storage set as "re-copy prohibited", content stored with the copy control information on the recording medium at the time of storage set as "copyable with limited number", and storage The content stored with the copy control information on the recording medium at that time as "temporary storage" is protected by HDCP Revision 1 or Revision 2 or later before being output.

When outputting stored content to an external device as content of 2K or less (content of pixels of 1920×1080 or less), content protection processing for performing content protection as described above according to copy control information on a recording medium, Hereinafter, it will be referred to as “2K or less content protection processing” when outputting to an external device after accumulation.

(2-4) Convert the received over 2K content (content with a pixel count exceeding 1920×1080 pixels) into 2K or less content (content with a pixel count of 1920×1080 or less). For stored content of 2K or less (content with pixels of 1920 x 1080 or less), when the number of pixels is not converted when outputting to an external device after storage

In this case, the target content for external output is content of 2K or less (content with pixels of 1920×1080 or less), which is the same as in the case of (2-3) above. "2K or less content protection processing" is performed when outputting to an external device.

(2-5) Convert the received over 2K content (content with a pixel count exceeding 1920×1080 pixels) into 2K or less content (content with a pixel count of 1920×1080 or less). Stored content of 2K or less (content of 1920 x 1080 pixels or less) is converted to other content of 2K or less (content of 1920 x 1080 pixels or less) by performing pixel count conversion when outputting to an external device after storage. case

In this case, the target content for external output is content of 2K or less (content with pixels of 1920×1080 or less), which is the same as in the case of (2-3) above. "2K or less content protection processing" is performed when outputting to an external device.

(2-6) Received content of 2K or less (content of 1920×1080 pixels or less) accumulated without pixel conversion (content of 1920×1080 pixels or less) or received 2K content 2K or less content (1920 x 1080 pixels or less) converted to other 2K or less content (1920 x 1080 or less pixels) content (1920 x 1080 or less pixels) 1080 pixels or less) when not converting the number of pixels when outputting to an external device after storage

In this case, the target content for external output is content of 2K or less (content with pixels of 1920×1080 or less), which is the same as in the case of (2-3) above. "2K or less content protection processing" is performed when outputting to an external device.

(2-7) Content of 2K or less (content of 1920 x 1080 pixels or less) stored without performing pixel count conversion on received content of 2K or less (content of pixels of 1920 x 1080 or less) or received 2K content 2K or less content (1920 x 1080 pixels or less) converted to other 2K or less content (1920 x 1080 or less pixels) content (1920 x 1080 or less pixels) 1080 pixels or less content) is converted to other content of 2K pixels or less (1920 x 1080 pixels or less content) when outputting to an external device after storage.

In this case, the target content for external output is content of 2K or less (content with pixels of 1920×1080 or less), which is the same as in the case of (2-3) above. "2K or less content protection processing" is performed when outputting to an external device.

As described in (2-1) to (2-7) above, when outputting to an external device after accumulation, content protection processing is switched according to the number of pixels of the content when outputting to the external device after accumulation. . When outputting content over 2K with copy restrictions (content with a pixel count exceeding 1920 x 1080) to an external device, copy restricted content of 2K or less (content with a pixel count of 1920 x 1080 or less). When outputting to an external device in the state of , the content is output with more advanced content protection. As a result, more value-added content exceeding 2K (content having a pixel count exceeding 1920×1080 pixels) can be appropriately protected even in an external device.

[Move processing to external device after content storage]
It has already been explained that in the content storage process, the broadcast receiver 100 according to the third embodiment performs a common content protection process without switching the content protection process depending on the number of pixels of the content. This is because when content is stored by a content storage function that can be reproduced only by the broadcast receiver 100 that received and recorded the content, the content is originally managed only by the broadcast receiver 100 itself. This is because there is no need to consider multiple levels of protection processing. On the other hand, when moving stored content to an external device, the corresponding level of content protection processing may differ depending on the device to which the content is moved. Therefore, it is desirable to change content protection processing according to the number of pixels of content when moving stored content to an external device.

A specific example of move processing to an external device after content storage shown in FIG. 28 will be described below. Note that the move processing to the external device after the content is stored in the storage unit 110 shown in FIG. 8A may be performed via an IP interface using the LAN communication unit 121 shown in FIG. 8A as hardware, for example.

(3-1) Over 2K content (content exceeding 1920 x 1080 pixels) accumulated without performing pixel conversion on received over 2K content (content exceeding 1920 x 1080 pixels) content) or the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) ) converted to 2K and stored (content with a pixel count exceeding 1920 x 1080 pixels), when the pixel count is not converted when moving to an external device after storage

In this case, the content to be moved to the external device is content exceeding 2K (content having a pixel count exceeding 1920×1080 pixels).

Content stored with the copy control information on the recording medium at the time of storage as ``copyable without restrictions'' can be moved without content protection by DTCP when moving to an external device after storage. At this time, it is not considered whether or not protection was designated by the value of the "encryption_mode" parameter included in the content usage control descriptor at the time of storage.

DTCP is used for content stored with the copy control information on the recording medium at the time of storage as "re-copy prohibited" and content stored with the copy control information on the recording medium at the time of storage as "copy permitted". - The content can be protected by DTCP2 (described in Reference 1), which is a more advanced content protection system than IP, and can be moved to an external device. Even if the external device supports content protection by DTCP-IP, if it does not support content protection by DPCT2, it cannot play back content protected by DTCP2. not available). Therefore, although DPCT2 provides stronger content protection, existing external devices cannot handle content protected by DTCP2. On the other hand, content protection by DTCP-IP cannot operate new content protection flags of DPCT2, but it is possible to move content to existing DTCP-IP compatible external devices that do not support DPCT2.

[Reference 1: Digital Transmission Licensing Administrator DTCP2 Presentation to CPTWG January 27, 2016]

Content that is protected as described above in accordance with the copy control information on the recording medium when the stored content is moved to an external device as over 2K content (content with a pixel count exceeding 1920×1080 pixels). The protection process is hereinafter referred to as "over 2K content protection process" at the time of moving to an external device after storage.

(3-2) Over 2K content (content exceeding 1920 x 1080 pixels) accumulated without performing pixel conversion on the received over 2K content (content exceeding 1920 x 1080 pixels) content) or the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) ) and stored (content with a pixel count exceeding 1920 x 1080 pixels), pixel count conversion is performed when moving to an external device after storage and conversion to other 2K content. When to

In this case, the content to be moved to the external device is over 2K content (content with a pixel count exceeding 1920×1080 pixels), which is the same as in (3-1) above, so (3-1 ), the “2K content protection processing” is performed when moving to an external device after storage.

(3-3) Over 2K content (content exceeding 1920 x 1080 pixels) stored without performing pixel conversion on the received over 2K content (content exceeding 1920 x 1080 pixels) content) or the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) ) converted to 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to 2K or less content (content with a pixel count of 1920 x 1080 x1080 or less content)

In this case, the content to be moved to the external device is content of 2K or less (content of which the number of pixels is 1920×1080 or less).

In this case, the content that is stored with the copy control information on the recording medium at the time of storage as "copyable without restrictions" is protected by the value of the "encryption_mode" parameter included in the content usage control descriptor at the time of storage. Switches the content protection processing considering whether is specified or not. Specifically, when the value of "encryption_mode" is 1 and content protection is not specified, content can be moved without being protected by DTCP when it is moved to an external device after storage. If the value of "encryption_mode" is 0 and content protection is specified, DTCP (DTCP-IP when moving via an IP interface) is applied when moving to an external device after storage. can be moved. At this time, content protection by DTCP2 is not required.

In addition, for content stored with the copy control information on the recording medium at the time of storage set as "recopy prohibited" and content stored with the copy control information on the recording medium at the time of storage set as "number of copies permitted" , protection by DTCP (DTCP-IP when moving via an IP interface). At this time, content protection by DTCP2 is not required.

Content protection processing for protecting the content as described above according to the copy control information on the recording medium when the stored content is moved to an external device as content of 2K or less (content with pixels of 1920×1080 or less), Hereinafter, it will be referred to as “2K or less content protection processing” when moving to an external device after storage.

(3-4) Convert the received over 2K content (content with a pixel count exceeding 1920×1080 pixels) into 2K or less content (content with a pixel count of 1920×1080 or less). When moving stored content of 2K or less (1920 x 1080 pixels or less) to an external device after storage without converting the number of pixels

In this case, the content to be moved to the external device is content of 2K or less (content of pixels of 1920×1080 or less), which is the same as in (3-3) above. Performs "2K or less content protection processing" when moving to an external device after storage.

(3-5) Convert the received over 2K content (content with a pixel count exceeding 1920×1080 pixels) into 2K or less content (content with a pixel count of 1920×1080 or less). Stored content of 2K or less (content of 1920 x 1080 pixels or less) is converted to other content of 2K or less (content of 1920 x 1080 pixels or less) when moved to an external device after storage. When converting

In this case, the content to be moved to the external device is content of 2K or less (content of pixels of 1920×1080 or less), which is the same as in (3-3) above. Performs "2K or less content protection processing" when moving to an external device after storage.

(3-6) Received 2K or less content (1920 x 1080 or less pixel content) stored without pixel count conversion (1920 x 1080 or less pixel content) or received 2K or less 2K or less content (1920 x 1080 pixels or less) converted to other 2K or less content (1920 x 1080 or less pixels) content (1920 x 1080 or less pixels) 1080 pixels or less), when the number of pixels is not converted when moving to an external device after storage

In this case, the content to be moved to the external device is content of 2K or less (content of pixels of 1920×1080 or less), which is the same as in (3-3) above. Performs "2K or less content protection processing" when moving to an external device after storage.

(3-7) Content of 2K or less (content of 1920 x 1080 pixels or less) stored without performing pixel count conversion on received content of 2K or less (content of pixels of 1920 x 1080 or less) or received 2K content 2K or less content (1920 x 1080 pixels or less) converted to other 2K or less content (1920 x 1080 or less pixels) content (1920 x 1080 or less pixels) 1080 pixels or less) is converted to other 2K or less content (1920 x 1080 pixels or less) when moving to an external device after storage.

In this case, the content to be moved to the external device is content of 2K or less (content of pixels of 1920×1080 or less), which is the same as in (3-3) above. Performs "2K or less content protection processing" when moving to an external device after storage.

As described in (3-1) to (3-7) above, when moving to an external device after storage, content protection processing is performed according to the number of pixels of content when moving to an external device after storage. switch. When moving copy-restricted content over 2K (content with a pixel count exceeding 1920 x 1080) to an external device, copy-restricted content of 2K or less (content with a pixel count of 1920 x 1080 or less) When moving to an external device in the state of , move with more advanced content protection. As a result, more value-added content exceeding 2K (content having a pixel count exceeding 1920×1080 pixels) can be appropriately protected even in an external device.

In any of the above cases (3-1) to (3-7), when moving content to an external device, the content is copied only to one authenticated external device. Includes a series of processes to render the original content unplayable. At this time, the original content must be rendered unreproducible within one minute after the content is copied to the external device. Specific examples of disabling content reproduction include erasing the content itself, erasing the encryption key, and the like.

[Copy processing to external device after content storage]
It has already been explained that in the content storage process, the broadcast receiver 100 according to the third embodiment performs a common content protection process without switching the content protection process depending on the number of pixels of the content. This is because when content is stored by a content storage function that can be reproduced only by the broadcast receiver 100 that received and recorded the content, the content is originally managed only by the broadcast receiver 100 itself. This is because there is no need to consider multiple levels of protection processing. On the other hand, when copying stored content to an external device, the corresponding level of content protection processing may differ depending on the copy destination device. Therefore, it is desirable to vary the content protection process according to the number of pixels of the content when copying the stored content to the external device.

A specific example of copy processing to an external device after content storage shown in FIG. 28 will be described below. It should be noted that the copying process to the external device after the content is stored in the storage unit 110 shown in FIG. 8A may be performed via an IP interface having the LAN communication unit 121 shown in FIG. 8A as hardware, for example.

In addition, copying to an external device is prohibited for content that has been stored with copy control information on the recording medium at the time of storage set to "re-copy prohibited". For content stored with the copy control information on the recording medium at the time of storage set as "limited number of copies allowed", up to nine copies can be generated in addition to the original content. However, for example, in the case where the storage unit 110 in FIG. 8A that accumulates the content is configured by a RAID system that performs backup processing that is not directly accessible by the user, the copy for backup purpose that is not directly accessible by the user is not covered by the above 9. You can exclude it from the number limit. When making copies within the above nine copy limit numbers to an external device via an IP interface, it is necessary to make copies in a state where the number of copies, such as one copy, is managed for one authenticated external device. There is The original content after the number limit (nine) of copies has been generated can be moved to the external device by the move processing described above. The nine copy processing and the one original content move processing generate nine copies within the broadcast receiver 100 at the time of accumulation of the content, and transfer the ten pieces of content including the original content one by one to the external device. This process is equivalent to the move process.

A specific process of changing the content protection process according to the number of pixels of the content when copying the stored content to an external device will be described below.

(4-1) Over 2K content (content exceeding 1920 x 1080 pixels) stored without converting the received over 2K content (content exceeding 1920 x 1080 pixels) content) or the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) ) converted to 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is not converted to a pixel count when copied to an external device after storage.

In this case, the content to be copied to the external device is content exceeding 2K (content having a number of pixels exceeding 1920×1080).

Content stored with the copy control information on the recording medium at the time of storage as ``copyable without restrictions'' can be copied without content protection by DTCP when copying to an external device after storage. At this time, it is not considered whether or not protection was designated by the value of the "encryption_mode" parameter included in the content usage control descriptor at the time of storage.

Copying to an external device is prohibited for content that has been stored with copy control information on the recording medium at the time of storage set to "repeat prohibited". When copying content stored with the copy control information on the recording medium at the time of storage as "copyable with limited number" to an external device within the above-mentioned 9 limited numbers, more advanced than DTCP-IP is required. Content can be protected by DTCP2, which is a content protection system, and can be copied to an external device (in this case, by sending each content to be copied to the external device using DTCP2 move processing, In this case, the number of contents to be copied is reduced, and the number of contents to be copied is reduced to the extent that reproduction is disabled. However, it is not necessary to disable playback of the original content itself that is outside the 9 limit.) Even if the external device supports content protection by DTCP-IP, if it does not support content protection by DPCT2, it cannot play back content protected by DTCP2. not available). Therefore, DPCT2 provides stronger content protection, but existing external devices cannot handle content protected by DTCP2. On the other hand, content protection by DTCP-IP cannot operate a new content protection flag or the like of DPCT2, but can be copied for existing DTCP-IP compatible external devices that are not compatible with DPCT2.

Content that is protected as described above according to the copy control information on the recording medium when copying stored content to an external device as over 2K content (content with a pixel count exceeding 1920×1080 pixels). The protection process is hereinafter referred to as "2K content protection process" when copying to an external device after storage.

(4-2) Over 2K content (content exceeding 1920 x 1080 pixels) stored without performing pixel conversion on the received over 2K content (content exceeding 1920 x 1080 pixels) content) or the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) ) converted to over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content by converting the number of pixels when copying to an external device after storage. When to

In this case, the content to be copied to the external device is over 2K content (content with a pixel count exceeding 1920×1080 pixels), which is the same as in (4-1) above, so (4-1 ) is performed when copying to an external device after storage as described in ) above.

(4-3) Over 2K content (content exceeding 1920 x 1080 pixels) accumulated without performing pixel count conversion on received over 2K content (content having a pixel count exceeding 1920 x 1080 pixels) content) or the received over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to other over 2K content (content with a pixel count exceeding 1920 x 1080 pixels) ) converted to 2K content (content with a pixel count exceeding 1920 x 1080 pixels) is converted to 2K or less content (1920 pixels x1080 or less content)

In this case, the content to be copied to the external device is content of 2K or less (content of pixels of 1920×1080 or less).

In this case, the content that is stored with the copy control information on the recording medium at the time of storage as "copyable without restrictions" is protected by the value of the "encryption_mode" parameter included in the content usage control descriptor at the time of storage. Switches the content protection processing considering whether is specified or not. Specifically, when the value of "encryption_mode" is 1 and content protection is not specified, content can be copied without DTCP-based content protection when copying to an external device after storage. If the value of "encryption_mode" is 0 and content protection is specified, DTCP (DTCP-IP when copying via an IP interface) is used when copying to an external device after storage. can be copied. At this time, content protection by DTCP2 is not required.

Copying to an external device is prohibited for content that has been stored with copy control information on the recording medium at the time of storage set to "repeat prohibited". When copying the content stored with the copy control information on the recording medium at the time of storage as "copyable with limited number" to an external device within the above-mentioned 9 limited numbers, DTCP (via IP interface When copying, the data is protected by DTCP-IP). At this time, content protection by DTCP2 is not required. At this time, in order to realize copying while managing the number of contents, the move function of DTCP may be used in each copy of contents. In this case, since the move process is performed for one content within the nine limit number, the number of contents to be copied is reduced and treated as equivalent to disabling reproduction. content itself does not need to be made unplayable.

When copying stored content to an external device as content of 2K or less (content of pixels of 1920×1080 or less), content protection processing for performing content protection as described above according to copy control information on a recording medium, Hereinafter, it will be referred to as “2K or less content protection processing” when copying to an external device after storage.

(4-4) Convert the received over 2K content (content with a pixel count exceeding 1920×1080 pixels) into 2K or less content (content with a pixel count of 1920×1080 or less). When the stored content of 2K or less (content of 1920 x 1080 pixels or less) is not converted to the number of pixels when copied to an external device after storage

In this case, the content to be copied to the external device is content of 2K or less (content of pixels of 1920×1080 or less), which is the same as in (4-3) above. Performs "2K or less content protection processing" when copying to an external device after accumulation.

(4-5) Convert the received over 2K content (content with a pixel count exceeding 1920×1080 pixels) into 2K or less content (content with a pixel count of 1920×1080 or less). Stored content of 2K or less (content of 1920 x 1080 pixels or less) is converted to other content of 2K or less (content of 1920 x 1080 pixels or less) when copied to an external device after storage. When converting

In this case, the content to be copied to the external device is content of 2K or less (content of pixels of 1920×1080 or less), which is the same as in (4-3) above. Performs "2K or less content protection processing" when copying to an external device after accumulation.

(4-6) 2K or less content (content of 1920 x 1080 or less pixels) stored without performing pixel count conversion on the received content of 2K or less (content of 1920 x 1080 or less pixels) or received 2K content 2K or less content (1920 x 1080 pixels or less) converted to other 2K or less content (1920 x 1080 or less pixels) content (1920 x 1080 or less pixels) 1080 pixels or less), when the number of pixels is not converted when copying to an external device after storage

In this case, the content to be copied to the external device is content of 2K or less (content of pixels of 1920×1080 or less), which is the same as in (4-3) above. Performs "2K or less content protection processing" when copying to an external device after accumulation.

(4-7) 2K or less content (content of 1920 x 1080 or less pixels) stored without performing pixel count conversion on the received content of 2K or less (content of 1920 x 1080 or less pixels) or received 2K content 2K or less content (1920 x 1080 pixels or less) converted to other 2K or less content (1920 x 1080 or less pixels) content (1920 x 1080 or less pixels) 1080 pixels or less content) is converted to other 2K or less content (1920 x 1080 pixels or less content) when copying to an external device after storage.

In this case, the content to be copied to the external device is content of 2K or less (content of pixels of 1920×1080 or less), which is the same as in (4-3) above. Performs "2K or less content protection processing" when copying to an external device after accumulation.

As described in (4-1) to (4-7) above, when copying to an external device after storage, content protection processing is performed according to the number of pixels of the content when copying to the external device after storage. switch. When copy-restricted content over 2K (content with a pixel count exceeding 1920 x 1080) is copied to an external device, copy-restricted content of 2K or less (content with a pixel count of 1920 x 1080 or less) When copying to an external device in the state of , copy with more advanced content protection. As a result, more value-added content exceeding 2K (content having a pixel count exceeding 1920×1080 pixels) can be appropriately protected even in an external device.

It should be noted that the case of copying the content stored as "number-restricted copy allowed" to the external device within the above-mentioned 9 limited number has been explained in (4-1) to (4-7) above. The remaining number of copies that can be copied is the same regardless of whether "2K or less content protection processing" is used when copying to an external device after storage or "2K or less content protection processing" is used when copying to an external device after storage. It is assumed that one is subtracted, and there is no need to provide a difference in the number of copies that can be managed per se based on the difference in content protection processing at the time of copying.

In any of the external output processing, external move processing, and external copy processing described above, for external devices that do not support the content protection function described in each condition, output, move, or copy is prohibited. should be configured to

It should be noted that when 'digital_recording_control_data' information and 'encryption_mode' information for which the same received content is to be protected is transmitted via a broadcast transmission path using a plurality of different tables and descriptors, or when communication with the broadcast transmission path When the same or different tables and descriptors are transmitted via both lines, the highest priority is determined using a predetermined priority determination process based on the types of tables and descriptors and the type of transmission path. Information with a high value may be used for the content protection processing described in this embodiment.

Further, HDCP, which is a content protection method used for the external device output processing before storage and the external device output processing after storage, is a content protection method for protecting content such as decoded video. DTCP, DTCP-IP, and DTCP2, which are used for processes such as moving and copying to and from a network, are content protection schemes for protecting content such as encoded video, and the content to be protected is different. In spite of this, the threshold for switching the content protection process according to the number of pixels of the content in the broadcast receiver 100 of the third embodiment is the content exceeding 2K (the number of pixels exceeding 1920×1080). content) and content of 2K or less (content of pixels of 1920×1080 or less) are set equally at the boundary. In this way, by equalizing the switching threshold value for switching content protection processing according to the number of pixels even in content protection schemes in which the aspects of content to be protected are different, the number of types of conditional branching for switching content protection processing is minimized. It is possible to make the processing simple and effective.

According to the third embodiment of the present invention described above, not only the process of outputting content to an external device before accumulating the content, but also the process of outputting the content to an external device after accumulating the content, the process of moving the content to the external device, or In any case of copy processing to an external device, content protection processing is switched according to the number of pixels of content. As a result, content with a higher added value and a high number of pixels can be appropriately protected even in an external device. In addition, while the content is being stored, the processing can be simplified by performing common content protection regardless of the number of pixels of the content. In other words, in the case of output processing, move processing, or copy processing to external devices with various content protection levels, content protection processing is switched according to the number of pixels of the content, and content that can be played only on the device itself is stored as content. Processing can be simplified by performing common content protection regardless of the number of pixels.

(Example 4)
A fourth embodiment of the present invention will be described below. The fourth embodiment of the present invention has the same hardware configuration as the broadcast receiver 800 of the second embodiment, and the configuration, processing, effects, etc. of this embodiment are the same as those of the second embodiment except for the content protection processing. do. Therefore, the differences between the present embodiment and the second embodiment will be mainly described below, and descriptions of common points will be omitted as much as possible to avoid duplication.

A fourth embodiment of the present invention has the same hardware configuration as the broadcast receiver 800 in the second embodiment, and performs control for realizing a different copyright protection function. It should be noted that what will be described in this embodiment is the content protection control for video among the contents, and for audio, the same control as in the following description may be performed, or a different content protection control may be performed. .

FIG. 29 is a table summarizing processing of the copyright protection function in the broadcast receiving apparatus 800 of the fourth embodiment. In the broadcast receiving apparatus 800 of the fourth embodiment, the received content is content exceeding 2K (pixel count exceeding 1920×1080) such as 4K content (pixel count 3840×2160) or 8K content (pixel count 7680×4320). content) or content of 2K or less (content having pixels of 1920×1080 or less), the copyright protection processing for the content before and after the content storage processing is switched.

In FIG. 29, the content protection processing shown in the row of MMT as the transmission method is the content protection processing applied to the content for which reception processing is performed by the MMT decoding processing unit 841 of the broadcast receiver 800 in FIG. Since it is the same as the content protection processing in FIG. 28 described in Example 3, the description thereof is omitted.

On the other hand, in FIG. 29, the content protection processing shown in the line of MPEG2-TS as the transmission method is the content protection processing applied to the content to be received by the MPEG2-TS decoding processing unit 842 of the broadcast receiver 800 in FIG. be.

It is assumed that all contents received by the broadcast receiver 800 according to the fourth embodiment of the present invention in the MPEG2-TS transmission system are contents of 2K or less (contents of 1920×1080 pixels or less).

Since the contents received by the MPEG2-TS transmission system are all contents of 2K or less (contents with pixels of 1920×1080 or less), the broadcast receiver 800 according to the fourth embodiment of the present invention receives by the MPEG2-TS transmission system. 2K or less content (content with 1920×1080 pixels or less) and 2K or less content (content with 1920×1080 or less pixels) received by the MMT transmission method share processing. Specifically, in any case, content protection processing may be performed on content of 2K or less (content of 1920×1080 pixels or less) received by the MMT transmission method described in the third embodiment.

Here, the MMT transmission method and the MPEG2-TS transmission method differ in the format of the table in which the control information used for content protection is transmitted. Specifically, in the MMT transmission system, content copy control descriptors and content usage control descriptors are mainly transmitted by MPT (also MH-EIT and MH-SDT), for example. On the other hand, in the MPEG2-TS transmission system, the digital copy control descriptor and content use descriptor, which are the corresponding copy control related information, are mainly transmitted by PMT (program map table) (also EIT and SDT), for example. be done. Therefore, the formats of the tables and descriptors in which the copy control related information is transmitted are different.

However, for the "digital_recording_control_data" parameter and the "copy_restriction_mode" parameter stored in the descriptor, the same format can be used for the MMT transmission method and the MPEG2-TS transmission method. Therefore, in the broadcast receiver 800 according to the fourth embodiment of the present invention, the interpretation of the 'digital_recording_control_data' parameter and the 'copy_restriction_mode' parameter designating content protection is shared between the MMT transmission system and the MPEG2-TS transmission system.

As a result, content of 2K or less (content of pixels of 1920×1080 or less) received by the MPEG2-TS transmission method and content of 2K or less (content of pixels of 1920×1080 or less) received by the MMT transmission method , external output processing before content storage, content storage processing, external output processing after content storage, move processing to an external device after content storage, and copy processing to an external device after content storage are common. can be simplified and processing can be simplified. Each specific process performs content protection processing for content of 2K or less (content of pixels of 1920×1080 or less) received by the MMT transmission method described in the third embodiment. Since the content has already been explained in the third embodiment, the explanation is omitted.

Furthermore, by standardizing this process, content protection processing for content of 2K or less (content of 1920 x 1080 pixels or less) received by the MPEG2-TS transmission method is equivalent to content of 2K or less (content of pixels of 1920 x 1080 or less) received by the MMT transmission method. 1920×1080 or less content), content exceeding 2K (content with a pixel count exceeding 1920×1080) received by the MMT transmission method is protected before or after content storage. The pixel number conversion process makes it possible to share the process with the content protection process in the case of content of 2K or less (content of 1920×1080 pixels or less), so the effect of simplifying the process is very high.

According to the fourth embodiment of the present invention described above, it is possible to obtain the same effects as those of the third embodiment for the content received by the MMT transmission method. In addition, for content with a predetermined number of pixels or less, the content received by the MMT transmission method and the content received by MPEG2-TS are processed not only for output processing to an external device before content storage, but also for content after content storage. Content protection processing can be standardized for output processing to external devices, move processing to external devices, or copy processing to external devices, simplifying processing beyond transmission methods. becomes possible.

Although the embodiments of the present invention have been described above using Examples 1 to 4, the configuration for realizing the technology of the present invention is not limited to the above-described examples, and various modifications are conceivable. For example, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, or to add the configuration of another embodiment to the configuration of one embodiment. These all belong to the scope of the present invention. Numerical values, messages, and the like appearing in the sentences and drawings are only examples, and even if different ones are used, the effect of the present invention is not impaired.

Some or all of the above-described functions and the like of the present invention may be realized by hardware by designing them in an integrated circuit, for example. Alternatively, the functions may be realized by software, in which the microprocessor unit or the like interprets and executes an operation program for realizing each function. Hardware and software may be used together.

The software for controlling the broadcast receiver 100 may be stored in the ROM 103 and/or the storage (accumulation) unit 110 of the broadcast receiver 100 in advance at the time of product shipment. It may be obtained from another application server 500 or the like on the Internet 200 via the LAN communication unit 121 after product shipment. Also, the software stored in a memory card, an optical disc, or the like may be acquired via the expansion interface section 124 or the like.

Also, the control lines and information lines shown in the drawings are those considered necessary for explanation, and do not necessarily show all the control lines and information lines on the product. In fact, it may be considered that almost all configurations are interconnected.

DESCRIPTION OF SYMBOLS 100,800...Broadcast receiver, 100a...Antenna, 101,801...Main control part, 102,802...System bus, 103,803...ROM, 104,804...RAM, 110,810...Storage part, 121,821... LAN communication section 124, 824... Expansion 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 unit 147 Subtitle color gamut conversion unit 151 Data decoder 152 Cache unit 153 Application control unit 154 Browser unit 155 Application color gamut conversion unit 156 Sound source unit 161, 861 Video synthesizing unit 162, 862 Monitor unit 163, 863 Video output unit 164, 864 Audio synthesizing unit 165, 865 Speaker unit , 166, 866... Audio output unit 170, 870... Operation input unit 841... MMT decoding unit 842... MPEG2-TS decoding unit 200... Internet 200r... Router device 200a... Access point 300t... Radio wave Tower 300s...Broadcasting satellite (or communication satellite) 300...Broadcasting station server 400...Service provider server 500...Other application servers 600...Mobile phone communication server 600b...Base station 700...Portable information terminal .

Claims (1)

A content protection processing method in a broadcast receiving device that receives digital broadcast content,
a receiving step of receiving 4K content having a pixel count of 3840×2160 and control information regarding content protection of the 4K content, which are transmitted by the digital broadcasting;
an accumulation step of accumulating the 4K content received in the receiving step;
The image of the 4K content received in the receiving step or the image of the 4K content accumulated in the accumulation step is output to the outside as it is without pixel number conversion, or is output to the outside after pixel number conversion. a step;
a copy step of copying the 4K content accumulated in the accumulation step to the outside as it is without pixel number conversion, or copying the content to the outside after pixel number conversion;
a move processing step of moving the 4K content accumulated in the accumulation step to the outside via an interface;
with
The processing states of the storage step, the video output step, and the copy step include:
a first video output processing state in which the 4K content is output to the outside in the video output step without storing the 4K content in the storage step;
a content accumulation processing state in which the 4K content is accumulated in the accumulation step;
a second video output processing state in which the content is output to the outside in the video output step after the storage processing of the 4K content in the storage step;
a copy processing state in which the content is copied to the outside by the copy step after the accumulation processing of the 4K content in the accumulation step;
there is
In the first video output processing state and the second video output processing state which are output to the outside, content protection processing is switched according to the number of pixels of the video of the content to be output,
Even in the copy processing state, which is copying to the outside, the content protection processing is switched according to the number of pixels of the video of the content to be copied,
Even if the content protection method in the copy processing state is a different type of content protection method from the content protection methods in the first video output processing state and the second video output processing state, , switching of content protection processing for the content to be copied, and switching of content protection processing for the content to be output in the first video output processing state and the second video output processing state. is to equalize the threshold conditions for the number of pixels to perform
In the move processing step, when the 4K content stored in the storage step is moved to the outside via the interface, the content is protected by DTCP2,
The video output in the video output step is performed via a video output unit having an HDMI terminal,
Content protection handling method.

Images