JP6560643B2 - Broadcast receiving apparatus and content protection processing method - Google Patents

Description

  The present invention relates to a broadcast receiving apparatus.

  One of the extended functions of the digital broadcasting service is data broadcasting that transmits digital data using broadcast waves and displays various information such as weather forecasts, news, and recommended programs. Many television receivers capable of receiving data broadcasts are already on the market, and many techniques related to data broadcast reception have been disclosed, including Patent Document 1 below.

JP 2001-186486 A

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

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

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

  As an example, a first broadcast receiving unit capable of receiving digital broadcast content transmitted by the first transmission method and control information related to content protection of the content, and a second different from the first transmission method. Received by the second broadcast receiving unit capable of receiving digital broadcast content and control information related to content protection of the content, and the first broadcast receiving unit or the second broadcast receiving unit. A storage unit that stores content; a video output unit that outputs content received by the first broadcast receiving unit or the second broadcast receiving unit or video of content stored in the storage unit to an external device; A control unit, and in the control state of the storage unit and the video output unit by the control unit, content is not stored in the storage unit A first video output processing state to be output from the video output unit to an external device, a content storage processing state in which content is stored in the storage unit, and a content after the content storage process in the storage unit There is a second video output processing state to be output from the output unit to the external device, and the control unit can control content protection processing based on the control information related to the content protection, and the first broadcast receiving unit In the first video output processing state, the content protection processing is switched according to the number of pixels of the content video in the first video output processing state, and according to the number of pixels of the content video in the second video output processing state. The content protection processing is switched, and the content protection processing is switched between the first video output processing state and the second video output processing state. The threshold number of pixels to be switched is equal, and the protection processing of the content having the number of pixels equal to or less than the threshold number of pixels among the content received by the first broadcast receiving unit is received by the second broadcast receiving unit. A broadcast receiving apparatus that is common to the content protection processing in the first video output processing state and the second video output processing state for the content is used.

  By using the technique of the present invention, it is possible to provide a broadcast receiving apparatus that can execute a function with higher added value.

1 is a configuration diagram of a broadcast communication system including a broadcast receiving apparatus according to Embodiment 1. FIG. It is explanatory drawing of the component of the encoding signal in MMT. It is a block diagram of MPU in MMT. It is a block diagram of the MMTP packet in MMT. It is a conceptual diagram of the protocol stack of the broadcasting system using MMT. It is a hierarchical block diagram of the control information used with a broadcast system. It is a list of the tables used by TLV-SI of a broadcasting system. It is a list of descriptors used in the TLV-SI of the broadcasting system. It is a list of messages used in the MMT-SI of the broadcasting system. It is a list of the tables used by MMT-SI of a broadcasting system. It is a list (1) of the descriptor used by MMT-SI of a broadcasting system. It is a list (2) of the descriptor used by MMT-SI of a broadcasting system. It is a list (3) of the descriptor used by MMT-SI of a broadcasting system. It is a figure which shows the relationship between the component of a broadcasting system, and each table. It is a figure which shows the data structure of MPT of a broadcast system. It is a figure which shows the data structure of the location information of a broadcast system. It is a figure which shows the data structure of the MPU time stamp descriptor of a broadcast system. It is a figure which shows the data structure of MH-EIT of a broadcast system. It is a figure which shows the data structure of the event package descriptor of a broadcast system. 1 is a block diagram of a broadcast receiving apparatus according to Embodiment 1. FIG. It is a block diagram of the logical plane structure of the presentation function of the broadcast receiver which concerns on Example 1. FIG. 1 is a software configuration diagram of a broadcast receiving apparatus according to Embodiment 1. FIG. 1 is a block diagram of a broadcast station server according to Embodiment 1. FIG. 1 is a block diagram of a service provider server according to Embodiment 1. FIG. 1 is a block diagram of a portable information terminal according to Embodiment 1. FIG. 1 is a software configuration diagram of a portable information terminal according to Embodiment 1. FIG. 1 is a system configuration diagram of clock synchronization / presentation synchronization of a broadcast receiving apparatus according to Embodiment 1. FIG. It is a figure which shows the data structure of the NTP format of a broadcast system. It is a figure which shows the data structure of MH-TOT of a broadcast system. It is a figure which shows the format of the JST_time parameter of a broadcast system. It is a figure which shows the data structure of the time information of the TMCC extension information area | region of a broadcast system. It is a figure which shows the calculation method of the present date from MJD of the broadcast receiver which concerns on Example 1. FIG. It is an operation | movement sequence diagram at the time of the channel scan of the broadcast receiver which concerns on Example 1. FIG. It is a figure which shows the data structure of TLV-NIT of a broadcast system. It is a figure which shows the data structure of the satellite distribution system descriptor of a broadcast system. It is a figure which shows the data structure of the service list descriptor of a broadcast system. It is a figure which shows the data structure of AMT of a broadcast system. FIG. 3 is an operation sequence diagram at the time of channel selection of the broadcast receiving apparatus according to the first embodiment. It is a conceptual diagram explaining the reference of MPT of each package by PLT of a broadcasting system. It is a figure which shows the data structure of PLT of a broadcast system. 1 is an external view of a remote control capable of controlling a broadcast receiving device according to Embodiment 1. FIG. It is a figure which shows the data structure of the remote control key descriptor of a broadcasting system. It is a figure explaining the channel selection process of a multi organization channel. It is a figure explaining the angle selection process of a multi view corresponding program. It is a figure which shows the data structure of LCT of a broadcast system. It is a figure which shows the data structure of the MPU presentation area | region designation | designated descriptor of a broadcasting system. It is a figure which shows allocation of the layout to the layout number based on LCT. It is a figure which shows allocation of the layout to the layout number based on LCT. It is a figure which shows allocation of the layout to the layout number based on LCT. It is a figure which shows allocation of the layout to the layout number based on LCT. It is a figure explaining the exception process of the screen layout control based on LCT. It is a figure explaining the exception process of the screen layout control based on LCT. It is a figure which shows the data structure of the video component descriptor of a broadcast system. It is a figure explaining the meaning of the video signal aspect ratio of a video component descriptor. It is a figure explaining the aspect-ratio conversion process of the broadcast receiver which concerns on Example 1. FIG. It is a figure explaining the aspect-ratio conversion process of the broadcast receiver which concerns on Example 1. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 1. FIG. It is a screen display figure at the time of the emergency alert broadcast display of the broadcast receiver which concerns on Example 1. FIG. It is a figure which shows the data structure of the content copy control descriptor of a broadcasting system. It is a figure which shows the meaning of the copy control information of a content copy control descriptor. It is a figure which shows the data structure of the content utilization control descriptor of a broadcasting system. 6 is a block diagram of a broadcast receiving apparatus according to Embodiment 2. FIG. It is a figure explaining inconsistency of the present time display at the time of broadcast service switching. It is a figure explaining operation | movement of selection control of the present time information reference source which concerns on Example 2. FIG. FIG. 9 is an operation sequence diagram of current time information update processing according to the second embodiment. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 2. FIG. It is a screen display figure of the EPG screen of the broadcast receiving apparatus which concerns on Example 2. FIG. It is a figure explaining the content protection process which concerns on Example 3. FIG. It is a figure explaining the content protection process which concerns on Example 4. FIG.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

(Example 1)
[System configuration]
FIG. 1 is a system configuration diagram illustrating an example of a broadcast communication system including a broadcast receiving apparatus according to the present 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 200r and an access point 200a, a radio tower 300t and a broadcast satellite (or communication satellite) 300s, a broadcast station A server 300, a service provider server 400, other application servers 500, a mobile telephone communication server 600, a base station 600b of a mobile telephone communication network, and a portable information terminal 700.

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

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

  The radio tower 300t is a broadcasting facility of a broadcasting station, and transmits broadcast waves including encoded data of broadcast programs, caption information, other applications, general-purpose data, and the like. The broadcast satellite (or communication satellite) 300s receives the broadcast wave transmitted from the radio tower 300t of the broadcast station, performs appropriate frequency conversion, etc., and then broadcasts the antenna 100a connected to the broadcast receiving device 100 to the antenna 100a. It is a repeater that retransmits waves. The broadcasting station includes a broadcasting station server 300. The broadcast station server 300 stores metadata such as broadcast programs (video content, etc.) and program titles, program IDs, program outlines, performer information, broadcast date and time of each broadcast program, and the video content and each metadata are stored. Based on the contract, it can be provided to the service provider. The provision of the moving image content and each metadata to the service provider may be performed through an API (Application Programming Interface) provided in the broadcasting station server 300.

  The service provider server 400 is a server device prepared by a service provider, and can provide various services linked to a broadcast program distributed from a broadcasting station. The service provider server 400 also stores, manages, and distributes video content and metadata provided from the broadcast station server 300, various contents and applications linked to broadcast programs, and the like. In addition, in response to an inquiry from a television receiver or the like, it also has a function of searching for available contents and applications and providing a list. 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. Moreover, the function of the service provider server 400 may be provided by the broadcast station server 300.

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

  The mobile telephone communication server 600 is connected to the Internet 200, and is connected to the portable information terminal 700 via the base station 600b. The mobile telephone communication server 600 manages telephone communication (call) and data transmission / reception via the mobile telephone communication network of the portable information terminal 700, and each server device and other communication devices on the portable information terminal 700 and the Internet 200. Data can be sent and received through communication with the. Communication between the base station 600b and the portable information terminal 700 is performed using a W-CDMA (Wideband Code Multiple Access) (registered trademark) method, a GSM (Global System for Mobile communications) (registered trademark) method, an LTE (Long Term Term) method. Alternatively, it may be performed by other communication methods.

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

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

  MPEG2-TS is characterized in that components such as video and audio constituting a program are multiplexed into one stream together with a control signal and a clock. Since it is handled as one stream including a clock, it is suitable for transmitting one content through one transmission path in which transmission quality is ensured, and has been adopted in many conventional digital broadcasting systems. On the other hand, the function of MPEG2-TS in response to environmental changes related to content distribution, such as recent diversification of content, diversification of devices using content, diversification of transmission paths for content distribution, diversification of content storage environment Therefore, MMT is a newly developed media transport system.

  FIG. 2A shows an example of an outline of the encoded signal in the MMT of the present embodiment. As shown in the figure, the MMT of the present embodiment has an MFU (Media Fragment Unit), an MPU (Media Processing Unit), an MMTP (MMT Protocol) payload, and an MMTP packet as elements constituting an encoded signal. And

  The MFU is a format at the time of transmission of video, audio, and the like, and may be configured in units of NAL (Network Abstraction Layer) units or access units. The MPU includes one or more access units, and can perform video and audio decoding processing by the MPU alone. The MPU may be composed of MPU metadata including information on the configuration of the entire MPU, movie fragment metadata including information of encoded media data, and sample data that is encoded media data. A plurality of movie fragment data and sample data may exist in one MPU. Further, it is assumed that MFU can be extracted from the sample data. FIG. 2B shows an example of the configuration of the MPU. Note that, by adding a sequence number to each MPU belonging to the same asset, any MPU can be distinguished from other MPUs by the asset ID for identifying the asset and the MPU sequence number. In the case of media such as video components and audio components, the presentation time and decoding time may be specified in units of MPUs or access units.

  The MMTP packet includes a header part and an MMTP payload, and transmits MFU and MMT control information. The MMTP payload includes a payload header corresponding to the content (data unit) stored in the payload portion. FIG. 2C shows an example of the outline from the construction of the MFU from the video / audio signal, further storing it in the MMTP payload, and configuring the MMTP packet. Note that, in a video signal that is encoded using inter-frame prediction, it is desirable to configure the MPU in GOP (Group Of Pictures) units. Further, when the size of the MFU to be transmitted is small, one MFU may be stored in one payload part, or a plurality of MFUs of the same type may be stored in one payload part. When the size of the MFU to be transmitted is large, one MFU may be divided into a plurality of payload parts and stored. Further, the MMTP packet may be protected using a technique such as Application Layer Forward Error Correction (AL-FEC) or Automatic Repeat Request (ARQ) in order to recover a packet loss on the transmission path.

  In the broadcasting system of the present embodiment, MPEG-H HEVC (High Efficiency Video Coding) is used as the video encoding system, and MPEG-4 AAC (Advanced Audio Coding) or MPEG-4 ALS (Audio Lossless) is used as the audio encoding system. Coding) is used. Encoded data such as video and audio of a broadcast program encoded by each of the above methods is in the MFU or MPU format, is further carried on the MMTP payload, is converted into an MMTP packet, and is transmitted as an IP (Internet Protocol) packet. And Further, data contents related to a broadcast program may be in the MFU or MPU format, further MMTP packetized on the MMTP payload, and transmitted by IP packet. The data content transmission method includes (1) a caption / text super transmission method used for streaming data synchronized with broadcasting, (2) an application transmission method used for data transmission service asynchronous with broadcasting, and (3) from a broadcasting station. There are four types of event message transmission methods used for synchronous / asynchronous message notification to applications running on a television receiver, and (4) general-purpose data transmission methods for transmitting other general-purpose data in a synchronous / asynchronous manner. Shall.

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

  In the broadcasting system of the present 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 configuration of a broadcast program. It is assumed that the format of the MMT control message is MMTP packet on the MMTP payload, and is 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. Note that MPEG2-TS indicates the component display time based on a different clock for each TS, whereas MMT indicates the component display time based on the Coordinated Universal Time (UTC). To do. With these mechanisms, it is possible for the terminal device to synchronously display components transmitted from different transmission points through different transmission paths. In order to provide UTC, it is assumed that an IP packet in NTP (Network Time Protocol) format is used.

[Control information of broadcasting system using MMT]
In the broadcast system supported by the broadcast receiving apparatus 100 according to the present embodiment, as described above, the control information includes the TLV-SI related to the TLV multiplexing method for multiplexing IP packets and the MMT that is the media transport method. Prepare the relevant MMT-SI. TLV-SI provides information for the broadcast receiving apparatus 100 to demultiplex IP packets multiplexed on the broadcast transmission path. The TLV-SI is composed of a “table” and a “descriptor”. The “table” is transmitted in the section format, and the “descriptor” is arranged in the “table”. The MMT-SI is transmission control information indicating information related to the configuration of the MMT package and the broadcast service. MMT-SI is composed of three levels: “message” for storing “table” and “descriptor”, “table” having elements and attributes indicating specific information, and “descriptor” indicating more detailed information. Shall be. An example of the hierarchical structure of the control information used in the broadcasting system of the present embodiment is shown in FIG.

<Table used in TLV-SI>
FIG. 5A shows a list of “tables” used in the TLV-SI of the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment. In the present embodiment, the following table is used as a “table” of TLV-SI.

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

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

(3) Table set by the operator It is also possible to prepare a table uniquely set by the service operator.

<Descriptor used in TLV-SI>
FIG. 5B shows a list of “descriptors” arranged in the TLV-SI of the broadcasting system to which the broadcast receiving apparatus 100 of the present embodiment corresponds. In this embodiment, the following are used as “descriptors” of TLV-SI.

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

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

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

(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 a service to be assigned to the one-touch channel selection button of the receiver remote control.

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

<Messages used in MMT-SI>
FIG. 6A shows a list of “messages” used in the MMT-SI of the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment. In this embodiment, it is assumed that the following message is used as a “message” of MMT-SI.

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

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

(3) CA message The CA message is used to transmit a table for identifying the 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 The data transmission message is a message for storing a table relating to data transmission.

(6) Message set by the operator In addition, it is possible to prepare a message uniquely set by the service operator.

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

(1) MPT
The MMT package table (MPT) provides information constituting the package such as a list of assets and a position of the assets on the network. The MPT may be stored in the PA message.

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

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

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

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

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

(7) DCM
The Download Control Message (DCM) transmits key related information including a key for decrypting a transmission path cipher for downloading. The DCM may be stored in the M2 section message.

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

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

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

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

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

(13) MH-SDT
The MH-Service Description Table (MH-Service Description Table: MH-SDT) has a sub-table that represents a service included in a specific TLV stream, and information on the organization channel such as the name of the organization channel and the name of the broadcaster. Is transmitted. The MH-SDT may be stored in the M2 section message.

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

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

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

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

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

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

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

<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 the present embodiment corresponds. The descriptor is control information that provides more detailed information and is arranged in a table. Note that the table in which the descriptor is arranged may be determined according to the descriptor. In the present embodiment, it is assumed that the following are used as “descriptors” of MMT-SI.

(1) Asset group descriptor The asset group descriptor provides asset group relationships and priorities within groups. The asset group descriptor may be located in the MPT.

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

(3) Background Color Specification Descriptor The background color specification descriptor provides the backmost background color in the layout specification. The background color designation descriptor may be arranged in the LCT.

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

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

(6) Dependency Descriptor The dependency descriptor provides an asset ID of an asset having a dependency relationship. The dependency descriptor may be arranged in the MPT.

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

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

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

(10) Emergency information descriptor (MH)
The emergency information descriptor (MH) is used when emergency alert broadcasting is performed. The emergency information descriptor (MH) may be located in the MPT.

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

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

(13) MH-HEVC video descriptor The MH-HEVC video descriptor is an ITU-T recommendation H.264 standard. H.265 | Used to describe basic encoding parameters of ISO / IEC 23008-2 video stream (HEVC stream). The MH-HEVC video descriptor may be located in the MPT.

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

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

(16) MH-service list descriptor The MH-service list descriptor provides a list of services according to service identification and service type. The MH-service list descriptor may be arranged in the MH-BIT.

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

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

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

(20) MH-stream identification descriptor The MH-stream identification descriptor is used to label the component stream of the service and to refer to the description content indicated by the video component descriptor in the MH-EIT. . The MH-stream identification descriptor may be arranged in the MPT.

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

(22) MH-Parental Rate Descriptor The MH-Parental Rate Descriptor represents viewing restrictions based on age, and is used to extend based on other restriction conditions. The MH-parental rate descriptor may be located in MPT or MH-EIT.

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

(24) MH-Target Area Descriptor The MH-target area descriptor is used to describe an area targeted by a program or a part of streams constituting the program. The MH-target area descriptor may be located in the MPT.

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

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

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

(29) IP Data Flow Descriptor The IP data flow descriptor provides information on the IP data flow constituting the service. The IP data flow descriptor may be located in the MH-SDT.

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

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

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

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

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

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

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

(37) Event message descriptor The event message descriptor conveys information related to event messages in general. The event message descriptor may be located in the EMT.

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

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

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

(41) MPU extended time stamp descriptor The MPU extended time stamp descriptor provides the decoding time of the access unit in the MPU. The MPU extended timestamp descriptor may be placed in the MPT.

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

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

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

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

(46) MH-Simple Application Location Descriptor The MH-simple application location descriptor is described in order to indicate details of an application acquisition destination. 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 described in order to set an application boundary and to set broadcast resource access authority for each area (URL). The MH-application boundary authority setting descriptor may be arranged in the MH-AIT.

(48) MH-Activation Priority Information Descriptor The MH-activation priority information descriptor is described for designating the application activation priority. The MH-activation priority information descriptor may be arranged in the MH-AIT.

(49) MH-cache information descriptor The MH-cache information descriptor is described for use in cache control in the case where resources constituting an application are cached and held when application reuse is assumed. . The MH-cache information descriptor may be arranged in the MH-AIT.

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

(51) Link destination PU descriptor The link destination PU descriptor describes another presentation unit that may transition from the presentation unit (PU). The link destination PU descriptor may be arranged 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. The lock cache designation descriptor may be arranged in the DCC table.

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

(54) MH-Download Protection Descriptor The MH-Download Protection Descriptor describes location information and transmission information of an MMTP packet that transmits DCM or DMM. The MH-download protection descriptor may be located in MPT or MH-SDTT.

(55) Application service descriptor The application service descriptor describes entry information of an application related to the service. The application service descriptor may be located in the MPT.

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

(57) PU configuration descriptor The PU configuration descriptor indicates a list of MPUs constituting the presentation unit as mapping information between the presentation unit and the transmission unit. The PU configuration descriptor may 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. The MH-hierarchical coding descriptor may be located in the MPT.

(59) Content copy control descriptor The content copy control descriptor indicates information for controlling the copy generation in the digital recording device for the entire service. When digital recording is assumed to be performed, the broadcast station (copyright) Used by the user) to communicate information about the copy or the maximum transmission rate to the digital recording device. The content copy control descriptor may be arranged in MPT, MH-EIT, MH-SDT, etc.

(60) Content usage control descriptor The content usage control descriptor indicates information related to copy control and remote viewing control when a program is stored in a hard disk or when a video / audio signal is output from a receiver. Used for. The content usage control descriptor may be arranged in MPT, MH-EIT, MH-SDT, or the like.

(61) Descriptor set by the provider In addition, it is possible to prepare a descriptor uniquely set by the service provider.

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

  In the broadcast system supported by the broadcast receiving apparatus 100 according to the present embodiment, data transmission can be performed through a plurality of paths such as a TLV stream via a broadcast transmission path and an IP data flow via a communication line. The TLV stream includes a TLV-SI such as TLV-NIT or AMT, and an IP data flow that is a data flow of an IP packet. The IP data flow includes video assets including a series of video MPUs and audio assets including a series of audio MPUs. Similarly, a subtitle asset including a series of subtitle MPUs, a character super asset including a series of character super MPUs, a data asset including a series of data MPUs, and the like may be included in the IP data flow.

  These various assets are associated with the “package” by the description of the MPT (MMT package table) transmitted in the PA message. Specifically, the association may be performed by describing a package ID for identifying a package in the MPT and an asset ID for identifying 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 figure corresponds to the package ID, and the “asset_id_byte” parameter corresponds to the asset ID.

  The asset that constitutes the package may be only the asset in the TLV stream, but as shown in FIG. 7A, the asset that is transmitted by the IP data flow of the communication line may be included. This is because the location information of the asset is described in the MPT together with the asset ID for identifying each asset included in the package so that the broadcast receiving apparatus 100 of this embodiment can grasp the reference destination of each asset. realizable. The location information is specified by “MMT_general_location_info ()” in the MPT data structure shown in FIG. 7B. FIG. 7C shows an example of the data structure of the location information.

Depending on 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 the IPv6 data flow (location_type = 0x02)
(4) Data multiplexed in broadcast MPEG2-TS (location_type = 0x03)
(5) Data multiplexed in the IP data flow in MPEG2-TS format (location_type = 0x04)
(6) Data at the specified URL (location_type = 0x05)
For example, the broadcast receiving device 100 can refer to various data transmitted through various transmission paths.

  Among the above-mentioned reference destinations, (1) is an IP data flow included in a TLV stream of a digital broadcast signal received by the broadcast receiving apparatus 100 of the present embodiment via the antenna 100a, for example. However, when the MPT is transmitted including the IP data flow on the communication line side, the reference destination in (1) may be an IP data flow received via the communication line. Also, (2), (3), (5), and (6) are IP data flows received by the broadcast receiving apparatus 100 of this embodiment via a communication line. The above (4) receives a digital broadcast signal using the MMT system and a digital broadcast signal using the MPEG2-TS system, for example, as in the broadcast receiving apparatus 800 of Example 2 described later. In the case of a broadcast receiving apparatus having both reception functions, MPEG2-received by a reception function for receiving a digital broadcast signal using the MPEG2-TS system based on MPT location information included in the digital broadcast signal using the MMT system. It can be used when referring to data multiplexed in a TS.

  In addition, for media such as video components and audio components, presentation time and decoding time can be specified in units of MPUs or access units. Information regarding the presentation time and the 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 a data structure of an MPU time stamp descriptor describing information on the presentation time. The presentation time information of each MPU is specified by the “mpu_presentation_time” parameter of the MPU time stamp descriptor. Further, the MPU to be designated can be identified by the “mpu_sequence_number” parameter. In the broadcast receiving apparatus 100 according to the present embodiment, using the presentation time information, a plurality of MPUs designated by the MPT are presented (displayed and output) in conjunction with a clock based on NTP, which is time information expressed in UTC. Etc.). Similarly, the information related to the decoding time is described by the MPU extended time stamp descriptor, but detailed description thereof is omitted. The presentation control of various data using a clock based on the NTP will be described later.

  In the broadcasting system of this embodiment, a series of data in units of “packages” corresponds to “services” of digital broadcasting. The “service” is a series of “programs” sent according to a schedule. The “program” is treated as an “event” in the MMT system. Each event has a start time and duration specified by MH-EIT. Further, the ID of the MMT package corresponding to each event is specified by the event package descriptor arranged in the MH-EIT. FIG. 7E shows an example of the data structure of MH-EIT. The start time is specified by the “start_time” parameter in the figure, and the duration is specified by the “duration” parameter. FIG. 7F shows an example of the data structure of the event package descriptor. The correspondence between each event and the MMT package can be specified by the “MMT_package_id_byte” parameter of the event package descriptor arranged in the MH-EIT. MH-EIT is a copyright management process such as various processes (for example, an electronic program guide generation process, a recording reservation or a viewing reservation control, a temporary storage, etc.) in the “event” unit in the broadcast receiving apparatus 100 of this embodiment. ) And the like.

[Hardware configuration of broadcast receiver]
FIG. 8A is a block diagram illustrating an example of an internal configuration of the broadcast receiving apparatus 100. The broadcast receiving apparatus 100 includes a main control unit 101, a system bus 102, a ROM 103, a RAM 104, a storage (storage) unit 110, a LAN communication unit 121, an expansion interface unit 124, a digital interface unit 125, a tuner / demodulation unit 131, and a separation unit 132. , Video decoder 141, video color gamut conversion unit 142, audio decoder 143, character super decoder 144, subtitle decoder 145, subtitle synthesis unit 146, subtitle color gamut conversion unit 147, data decoder 151, cache unit 152, application control unit 153, A browser unit 154, an application color gamut conversion unit 155, a sound source unit 156, a video synthesis unit 161, a monitor unit 162, a video output unit 163, a voice synthesis unit 164, a speaker unit 165, a voice output unit 166, and an operation input unit 170. Is done.

  The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving apparatus 100 in accordance with 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 in which a basic operation program such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM (Electrically Erasable Programmable ROM) or a flash ROM is used. 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 a basic operation program and other operation programs. The ROM 103 and the RAM 104 may be integrated with the main control unit 101. Further, the ROM 103 may not use an independent configuration as shown in FIG. 8A but may use a partial storage area in the storage (accumulation) unit 110.

  The storage (storage) unit 110 stores an operation program and an operation setting value of the broadcast receiving apparatus 100, personal information of a user of the broadcast receiving apparatus 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. It is also possible to store content such as moving images, still images, and audio obtained from broadcast waves or downloaded via the Internet 200. All or some of the functions of the ROM 103 may be replaced by a partial area of the storage (storage) unit 110. Further, the storage (accumulation) unit 110 needs to hold stored information even when power is not supplied to the broadcast receiving apparatus 100 from the outside. Therefore, for example, a device such as a nonvolatile semiconductor element memory such as a flash ROM or SSD (Solid State Drive), a magnetic disk drive such as an HDD (Hard Disc Drive), or the like is used.

  The operation programs stored in the ROM 103 and the storage (accumulation) unit 110 can be added, updated, and expanded in function by download processing 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 and other communication devices on the Internet 200. It is also assumed that an MMT data string (or a 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). The LAN communication unit 121 includes an encoding circuit, a decoding circuit, and the like. The broadcast receiving apparatus 100 may further include other communication units such as a BlueTooth (registered trademark) communication unit, an NFC communication unit, and an infrared communication unit.

  The tuner / demodulation unit 131 receives a broadcast wave transmitted from the radio tower 300t via the antenna 100a, and tunes (tunes) to a service channel desired by the user based on the control of the main control unit 101. Further, the tuner / demodulator 131 demodulates the received broadcast signal to obtain an MMT data string. In the example shown in FIG. 8A, a configuration with one tuner / demodulation unit is illustrated. However, for the purpose of simultaneous display of a plurality of screens, back program recording, and the like, the broadcast receiving apparatus 100 includes a tuner / demodulation unit. It is good also as a structure mounted in multiple numbers.

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

  The video decoder 141 decodes the video data sequence 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 needed for video synthesis processing by the video synthesis unit 161. The audio decoder 143 decodes the audio data sequence input from the separation unit 132 and outputs audio information. The video decoder 141 and the audio decoder 143 are also supplied with streaming data in the MPEG-DASH (MPEG-Dynamic Adaptive Streaming HTTP) format obtained from the Internet 200 via the LAN communication unit 121, for example. good. A plurality of video decoders 141, video color gamut conversion units 142, audio decoders 143, and the like may be provided in order to simultaneously decode a plurality of types of video data sequences and audio data sequences.

  The character super decoder 144 decodes the character super data string input from the separation unit 132 and outputs character super information. The caption decoder 145 decodes the caption data string input from the separation unit 132 and outputs caption information. The superimposing information output from the character super decoder 144 and the subtitle information output from the subtitle decoder 145 are subjected to the synthesizing process in the subtitle synthesizing unit 146, and further, the subtitle color gamut converting unit 147 performs the synthesis in the video synthesizing unit 161. For the video composition process, a color space conversion process is performed as necessary. In the present embodiment, among the services centered on character information that are presented simultaneously with the broadcast program video, those related to the content of the video are referred to as subtitles, and other services are referred to as character supermarkets. To do. If they are not distinguished, they are collectively referred to as subtitles.

  The browser unit 154 transmits the multimedia application file acquired from the server device on the Internet 200 via the cache unit 152 or the LAN communication unit 121 and the file system data that is a component of the multimedia application file to the control information or LAN included in the MMT data string. The control information acquired from the server device on the Internet 200 via the communication unit 121 is presented according to an instruction from the application control unit 153 that interprets the control information. 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 as necessary for the video composition processing in the video composition unit 161. The browser unit 154 also plays the application audio information by acting 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 superposition is performed. The video composition unit 161 includes a video RAM (not shown), and the monitor unit 162 and the like are driven based on video information and the like input to the video RAM. Also, the video composition unit 161 is based on the control of the main control unit 101, and an EPG (Electronic Program Guide) created based on information such as scaling processing and MH-EIT included in the MMT-SI as necessary. Electronic program guide) Superimposes screen information. The monitor unit 162 is a display device such as a liquid crystal panel, for example, and provides video information selected and / or superimposed by the video composition unit 161 to the user of the broadcast receiving apparatus 100. The video output unit 163 is a video output interface that outputs the video information that has been selected and / or superimposed by the video composition unit 161.

  It is assumed that the presentation function of the broadcast receiving apparatus 100 of the present 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 in the presentation function of the broadcast receiving apparatus 100 of the present embodiment. In the logical plane structure, a character super plane for displaying a character super is arranged on the foreground, and a subtitle plane for displaying a subtitle is arranged on the next layer. In the third layer, a multimedia plane for displaying a broadcast video, a multimedia application, or a composite video thereof is arranged, and a background plane is arranged on the backmost surface. In the caption synthesizing unit 146 and the video synthesizing unit 161, drawing of the character super information on the character super plane, drawing of the subtitle information on the subtitle plane, and drawing on the multimedia plane such as video information and application information are performed. In addition, the background color is drawn on the background plane based on LCT or the like included in the MMT-SI. Note that a plurality of multimedia planes in the third layer can be prepared according to the number of video decoders 141. However, even when there are a plurality of multimedia planes, the application information and the like output from the application color gamut conversion unit 155 is output only to the foreground multimedia plane.

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

  The extension interface unit 124 is an interface group for extending the function of the broadcast receiving apparatus 100. In this embodiment, the extension interface unit 124 includes an analog video / audio interface, a USB (Universal Serial Bus) interface, a memory interface, and the like. To do. The analog video / audio interface performs input of analog video signals / audio signals from external video / audio output devices, output of analog video signals / audio signals to external video / audio input devices, and the like. The USB interface is connected to a PC or the like to transmit / receive data. A broadcast program or content may be recorded by connecting an HDD. A keyboard or other USB device may be connected. The memory interface transmits and receives data by connecting a memory card and other memory media.

  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 output the MMT data sequence obtained by demodulating by the tuner / demodulation unit 131, the MMT data sequence obtained via the LAN communication unit 121, or the mixed data of each MMT data sequence as it is. Shall. Further, the MMT data string input from the digital interface unit 125 may be controlled to be input to the separation unit 132. Output of digital content stored in the storage (storage) unit 110 or storage of digital content in the storage (storage) unit 110 may be performed via the digital interface unit 125.

  The digital interface unit 125 is a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, or the like, and outputs or inputs data in a format compliant with the DVI specification, the HDMI specification, the Display Port specification, or the like. It may be a thing. It may be output or input in the form of serial data conforming to the IEEE 1394 specification or the like. Further, 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 unit 125 and the LAN communication unit 121 may share the hardware configuration.

  The operation input unit 170 is an instruction input unit that inputs an operation instruction to the broadcast receiving apparatus 100. In this embodiment, a remote control receiving unit that receives a command transmitted from a remote controller (not shown) and a button switch are arranged. It shall consist of operation keys. Either one may be sufficient. Further, the operation input unit 170 may be replaced with a touch panel arranged on the monitor unit 162. A keyboard connected to the extension interface unit 124 may be substituted. The remote controller (not shown) may be replaced with a portable information terminal 700 having a remote command transmission function.

  As described above, when the broadcast receiving apparatus 100 is a television receiver or the like, the video output unit 163 and the audio output unit 166 are not essential components in 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, an 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 having a digital broadcast receiving function or a broadcast communication cooperation function. When the broadcast receiving apparatus 100 is a DVD recorder, HDD recorder, STB, or the like, the monitor unit 162 and the speaker unit 165 may not be provided. By connecting an external monitor and an external speaker to the video output unit 163, the audio output unit 166, or the digital interface unit 125, an operation similar to that of the broadcast receiving apparatus 100 of the present embodiment is possible.

[Broadcast receiving device software configuration]
FIG. 8C is a software configuration diagram of the broadcast receiving apparatus 100 of the present embodiment, and shows a software configuration in the ROM 103, the RAM 104, and the storage (storage) unit 110. In this embodiment, a basic operation program 1001 and other operation programs are stored in the ROM 103, and a reception function program 1002, a cooperation function program 1003, a recording / playback function program 1004, and other operations are stored in the storage (accumulation) unit 110. The program is stored. The storage unit 110 also stores a content storage area 1200 that stores content such as moving images, still images, and audio, and authentication information that is necessary when accessing an external mobile terminal device or each server device. It is assumed that an information storage area 1300 and various information storage areas for storing various other information are provided.

  The basic operation program 1001 stored in the ROM 103 is expanded in the RAM 104, and the main control unit 101 executes the expanded basic operation program 1001 to constitute a basic operation execution unit 1101. Similarly, the reception function program 1002, the linkage function program 1003, and the recording / playback function program 1004 stored in the storage (accumulation) unit 110 are expanded in the RAM 104, and the main control unit 101 further expands the reception function program 1002 and By executing the linkage function program 1003 and the recording / playback function program 1004, the reception function execution unit 1102, the linkage function execution unit 1103, and the recording / playback function execution unit 1104 are configured. The RAM 104 is provided with a temporary storage area that temporarily holds data created when each operation program is executed as necessary.

  In the following, in order to simplify the explanation, the main control unit 101 executes the basic operation processing to control each operation block by expanding the basic operation program 1001 stored in the ROM 103 into the RAM 104 and executing it. The unit 1101 is described as performing control of each operation block. The same description is made for other operation programs.

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

  The cooperation function execution unit 1103 manages device authentication and connection, transmission / reception of each data, and the like when the broadcast receiving apparatus 100 performs a cooperation operation with an external apparatus such as the portable information terminal 700. The recording / playback function execution unit 1104 stores a broadcast program acquired from a digital broadcast wave of this broadcast system, content acquired from each server device on the network, the content storage area 1200 of the storage (storage) unit 110, and the extended interface unit 124. Control is performed when recording in an external storage or the like connected to or when reproducing the broadcast program or content.

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

[Broadcasting station server configuration]
FIG. 9 is a block diagram illustrating an example of the internal configuration of the broadcast station server 300. The broadcast station server 300 includes a main control unit 301, a system bus 302, a RAM 304, a storage unit 310, a LAN communication unit 321 and a digital broadcast signal transmission unit 360.

  The main control unit 301 is a microprocessor unit that controls the entire broadcast station server 300 in accordance with a predetermined operation program. A system bus 302 is a data communication path for performing data transmission / reception between the main control unit 301 and each operation block in the broadcast station server 300. The RAM 304 serves as a work area when executing each operation program.

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

  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 further 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, in order to simplify the description, a process for controlling each operation block by causing the main control unit 301 to expand the basic operation program 3001 stored in the storage unit 310 to the RAM 304 and execute the basic operation program 3001 will be described. The operation execution unit 3101 is described as performing control of each operation block. The same description is made for other operation programs.

  The broadcast content management / distribution execution unit 3102 manages the program content and the like of each broadcast program stored in the broadcast content storage area 3200 and the metadata storage area 3300, the program content of each broadcast program, and the like. Performs control when providing metadata to service providers based on contracts. Furthermore, the broadcast content management / distribution execution unit 3102 provides a service provider based on the contract as necessary when providing the service provider with the program content of each broadcast program and each metadata. Authentication processing of the server 400 may be performed.

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

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

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

  The main control unit 401 is a microprocessor unit that controls the entire service provider server 400 according to a predetermined operation program. 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. The RAM 404 becomes 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 further stores a video content storage area 4200, a metadata storage area 4300, an application storage area 4400, and user information storage. An area 4500 is provided. The video content storage area 4200 stores program content of a broadcast program provided from the broadcast station server 300 as video content. In addition, the video content produced by the service provider is stored. The metadata storage area 4300 stores each metadata provided from the broadcast station server 300, metadata about video content produced by the service provider, and the like. The application storage area 4400 stores various applications for realizing a service linked to a broadcast program for distribution in response to a request from each television receiver. The user information storage area 4500 stores information (such as personal information and authentication information) related to users who are permitted to access the service provider server 400.

  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 expanded in the RAM 404, and the main control unit 401 further expands the basic operation program and the video. By executing the content management / distribution program and the application management / distribution program, a basic operation execution unit 4101, a video content management / distribution execution unit 4102, and an application management / distribution execution unit 4104 are configured.

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

  The video content management / distribution execution unit 4102 obtains the program content and the metadata of the broadcast program from the broadcasting station server 300, the video content stored in the video content storage area 4200 and the metadata storage area 4300, and each metadata. And the distribution of the video content etc. and each metadata to each television receiver. Furthermore, the video content management / distribution execution unit 4102 performs authentication processing and the like of each television receiver as necessary when delivering each video content and each metadata to each television receiver. You can go. The application management / distribution execution unit 4104 performs management of each application stored in the application storage area 4400 and control when each application is distributed in response to a request from each television receiver. Furthermore, the application management / distribution execution unit 4104 may perform authentication processing of each television receiver 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 broadcast receiving device 100 via the broadcast station server 300 on the Internet 200 and the router device 200r. The LAN communication unit 421 includes a coding circuit, a decoding circuit, and the like.

[Hardware configuration of portable information terminal]
FIG. 11A is a block diagram illustrating an example of an internal configuration of the portable information terminal 700. 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 expansion interface unit 724, an operation unit 730, an image processing unit 740, an audio processing unit 750, and a sensor unit 760. , Is composed.

  The 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.

  The ROM 703 is a memory in which a basic operation program such as an operating system and other operation programs are stored. For example, a rewritable ROM such as an EEPROM or a flash ROM is used. The RAM 704 serves as a work area when the basic operation program and other operation programs are executed. The ROM 703 and the RAM 704 may be integrated with the main control unit 701. In addition, the ROM 703 does not have an independent configuration as illustrated in FIG. 11A, and may use a partial storage area in the storage unit 710.

  The storage unit 710 stores an operation program and an operation setting value of the portable information terminal 700, personal information of the user of the portable 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, contents such as moving images, still images, and audio downloaded via the Internet 200 can be stored. All or part of the functions of the ROM 703 may be replaced by a partial area of the storage unit 710. In addition, the storage unit 710 needs to hold stored information even when power is not supplied to the portable information terminal 700 from the outside. Therefore, for example, a device such as a nonvolatile semiconductor element memory such as a flash ROM or SSD, a magnetic disk drive such as an HDD, or the like is used.

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

  The communication processing unit 720 includes a LAN communication unit 721, a mobile telephone network communication unit 722, and an NFC communication unit 723. The LAN communication unit 721 is connected to the Internet 200 via the router device 200r and the access point 200a, and transmits / receives data to / from each server device and other communication devices on the Internet 200. It is assumed that the connection with the router device 200r and the access point 200a is made by wireless connection such as Wi-Fi (registered trademark). The mobile telephone network communication unit 722 performs telephone communication (call) and data transmission / reception by wireless communication with the base station 600b of the mobile telephone communication network. The NFC communication unit 723 performs wireless communication when close to the corresponding reader / writer. The LAN communication unit 721, the mobile telephone network communication unit 722, and the NFC communication unit 723 are each provided with a coding circuit, a decoding circuit, an antenna, and the like. The communication processing unit 720 may further include another communication unit such as a BlueTooth (registered trademark) communication unit or an infrared communication unit.

  The extension interface unit 724 is an interface group for extending the functions of the portable information terminal 700, and in this embodiment, is configured with a video / audio interface, a USB interface, a memory interface, and the like. The video / audio interface performs input of video signals / audio signals from external video / audio output devices, output of video signals / audio signals to external video / audio input devices, and the like. The USB interface is connected to a PC or the like to transmit / receive data. A keyboard or other USB device may be connected. The memory interface transmits and receives data by connecting a memory card and other memory media.

  The operation unit 730 is an instruction input unit that inputs an operation instruction to the portable information terminal 700. In this embodiment, the operation unit 730 includes a touch panel 730t arranged on the display unit 741 and an operation key 730k in which button switches are arranged. Shall. Either one may be sufficient. The portable information terminal 700 may be operated using a keyboard or the like connected to the extension interface unit 724. The portable information terminal 700 may be operated using a separate terminal device connected by wired communication or wireless communication. That is, the portable information terminal 700 may be operated from the broadcast receiving device 100. The touch panel function may be provided in the display unit 741.

  The image processing unit 740 includes a display unit 741, an image signal processing unit 742, a first image input unit 743, and a second image input unit 744. The display unit 741 is a display device such as a liquid crystal panel, for example, and provides the image data processed by the image signal processing unit 742 to the user of the portable information terminal 700. 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. In addition, the image signal processing unit 742 has a function of performing format conversion, menu and other OSD (On Screen Display) signal superimposing processing, and the like as necessary. The first image input unit 743 and the second image input unit 744 convert light input from a lens into an electric signal by using an electronic device such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor) sensor. A camera unit for inputting image data of surroundings and objects.

  The audio processing unit 750 includes 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 audio signal processed by the audio signal processing unit 752 to the user of the portable information terminal 700. The voice input unit 753 is a microphone, and converts a user's voice and the like into voice data and inputs the voice data.

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

  The portable 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. Further, it may be a digital still camera, a video camera capable of shooting moving images, a portable game machine, a navigation device, or other portable digital devices.

  Note that the configuration example of the portable information terminal 700 illustrated in FIG. 11A includes a number of configurations that are not essential to the present embodiment, such as the sensor unit 760, but the present embodiment may be configured without these components. There is no loss of effect. Further, a configuration not shown in the figure such as a digital broadcast receiving function and an electronic money settlement function may be further added.

[Software configuration of portable information terminal]
FIG. 11B is a software configuration diagram of the portable information terminal 700 of the present embodiment, and shows a software configuration in the ROM 703, the RAM 704, and the storage unit 710. In this embodiment, a basic operation program 7001 and other operation programs are stored in the ROM 703, and a cooperation control program 7002 and other operation programs are stored in the storage unit 710. In addition, the storage unit 710 includes a content storage area 7200 for storing contents such as moving images, still images, and audio, an authentication information storage area 7300 for storing authentication information necessary for accessing the television receiver and each server device, It is assumed that various information storage areas for storing other various information are provided.

  A basic operation program 7001 stored in the ROM 703 is expanded in the RAM 704, and the main control unit 701 executes the expanded basic operation program to constitute a basic operation execution unit 7101. Similarly, the cooperative control program 7002 stored in the storage unit 710 is also expanded in the RAM 704, and the main control unit 701 executes the expanded cooperative control program to configure the cooperative control execution unit 7102. The RAM 704 includes a temporary storage area that temporarily stores data created when each operation program is executed as necessary.

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

  The cooperation control execution unit 7102 performs management such as device authentication and connection and transmission / reception of each data when the portable information terminal 700 performs a cooperation operation with the television receiver. In addition, the cooperation control execution unit 7102 includes a browser engine function for executing an application that works in conjunction with the television receiver.

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

[Time management of broadcast receivers]
The broadcast receiving apparatus 100 of the present 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. Hereinafter, the two types of time management functions will be described.

<Time management function based on NTP>
First, a 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 broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment. In the broadcast system of the present embodiment, UTC is transmitted from the broadcast transmission system to a receiver (such as the broadcast receiving device 100 of the present embodiment) in the 64-bit NTP timestamp format. In the NTP timestamp format, “seconds or more” of UTC is represented by 32 bits, and “less than seconds” is represented by 32 bits. However, in practice, it is difficult to reproduce 1 second with 32-bit accuracy. For this reason, as a system clock for synchronizing the video system and a system clock for operating an NTP clock, for example, as shown in the figure, “2 24” Hz (about 16.8 MHz) The frequency may be used. In view of the fact that the system clock in the conventional broadcasting system was 27 MHz and the hardware configuration of the receiver can be easily constructed, the number of "2 24" to "2 28" It is desirable to employ a power frequency as the system clock.

  If the system clock is set to a power of 2 such as “2 to the 24th power” to “2 to the 28th power” as described above on the broadcast transmission system side or the receiver side, it is received from the broadcast transmission system side. The lower 8 to 4 bits that are not referred to in the PLL (Phase Locked Loop) system for reproducing the system clock or the NTP clock in the NTP timestamp format transmitted to the machine side are “0” or “1”. You may make it fix to. That is, if the system clock is “2 to the power of n” Hz (n = 24 in the example of FIG. 12A, the same applies hereinafter), the lower “32-n” bits of the NTP timestamp format are set to “0” or “1”. It may be fixed. Alternatively, the receiver may process so as to ignore the lower “32-n” bits of the NTP timestamp format.

  On the broadcast transmission system side, when time information in the NTP format is obtained from the outside, a PLL system is configured by a 32 + n bit counter by a VCO (Voltage Controlled Oscillator) of “2 to the power of n” Hz, and the time information given from the outside Realizing a synchronized sending system clock. Further, the entire signal processing system is operated in synchronization with a system clock of “2 to the power of n” Hz. Further, the output of the transmission system clock is periodically transmitted to the receiver side through the broadcast transmission path as time information in the NTP length format. In the time information in the NTP length format transmitted to the receiver side, the lower “32-n” bits may be fixed to “0” or “1” among the 32 bits representing “less than second”. That is, the system clock counter on the broadcast transmission system side is composed of 32 + n bits.

  On the receiver side, time information in the NTP length format is received via the broadcast transmission path, and the reception system clock is reproduced by a PLL system based on a VCO of “2 to the power of n” Hz as in the broadcast transmission system side. Thereby, 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 power of n” Hz, clock synchronization between the broadcast transmission system side and the receiver side is realized, and stable signal reproduction is possible. 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 specified by an MPU extended time stamp descriptor (not shown) stored in the MPT. The presentation time is specified by an MPU time stamp descriptor (see FIG. 7D) stored in the MPT. The “mpu_sequence_number (MPU sequence number)” parameter in the MPU time stamp descriptor indicates the sequence number of the MPU describing the time stamp, and the “mpu_presentation_time (MPU presentation time)” parameter indicates the MPU presentation time as a 64-bit NTP timestamp. Shown in format. In other words, the receiver can control the presentation (display, output, etc.) timing of each MPU such as a video / audio signal, subtitles, and character superimpose by referring to the MPU time stamp descriptor stored in the MPT. Become.

  When focusing on the decoding timing and presentation timing control for each presentation unit such as the video / audio signal described above, the video / audio signal is synchronized even with a clock of about "2 to the 16th power" Hz (about 65.5 KHz). In this case, it is not necessary to refer to the lower 16 bits of the NTP timestamp format described in the MPU timestamp descriptor or the like. In other words, when a clock of “2 to the power of m” generated by dividing the system clock is used to control the decoding timing and presentation timing, the lower order of the NTP timestamp format described in the MPU timestamp descriptor etc. The “32-m” bit need not be referenced. Therefore, the lower “32-m” bits of the NTP timestamp format described in the MPU timestamp 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 the NTP format in the time management function based on NTP described above. The “reference_timestamp” parameter, the “transmit_timestamp” parameter, and the like in the NTP format are time data in a 64-bit NTP length format, and the “mpu_presentation_time” parameter in the MPU time stamp descriptor shown in FIG. 7D is also 64 bits long. Time data in the NTP timestamp format. The time data in the NTP length format and the time data in the NTP timestamp format are data in which “seconds or more” of UTC is represented by 32 bits and “sub-seconds” is represented by 32 bits. That is, time information up to “less than second” can be transmitted as time information in the NTP format. Furthermore, since the time information in the NTP format is expressed in UTC, unlike the time management in the conventional digital broadcasting, as shown in FIG. 3, it is distributed via the data flow and communication line transmitted through the broadcast transmission path. By managing both of the data flows using the time information in the NTP format, it is possible to easily match both the 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 according to the present embodiment can acquire the current date and the current time from the “JST_time” parameter of the MH-TOT. As shown in FIG. 12D, the “JST_time” parameter includes the lower 16 bits of the encoded data of the current date based on the modified Julian Date (MJD) and six standard times (Japan Standard Time: JST). It is assumed that 24-bit information represented by a binary-coded decimal (BCD) is included. It is possible to calculate the current date by performing a predetermined operation on the 16-bit encoded data of MJD. In addition, six 4-bit binary-coded decimal numbers represent “hour” in two decimal digits by the first two 4-bit binary-coded decimal numbers, and 10 by the next two 4-bit binary-coded decimal numbers. “Minute” is represented by two decimal digits, and “second” is represented by two decimal digits by the last two 4-bit binary-coded decimal numbers.

  That is, the difference between the time management based on the NTP format and the time management based on the MH-TOT is that the time management based on the former NTP format can transmit time information up to “less than second” as described above. In the latter time management based on MH-TOT, only time information up to “second unit” in JST can be transmitted.

  The broadcast receiving apparatus 100 according to the present embodiment has a time management function based on NTP, which is time information in UTC notation, and decoding and display synchronization processing of video, audio, subtitles, text super, and other presentation data that are broadcast signal contents. As a result, it is possible to realize a more accurate synchronization process. Furthermore, video, audio, subtitles, text super, or other data, which is content received as a broadcast signal, and video, audio acquired through a communication line path, by referring to information in UTC not the clock notation of the broadcasting station In addition, it is possible to perform decoding and display synchronization processing with subtitles, superimpose characters, or other data.

  Furthermore, in the broadcast receiving apparatus 100 of the present embodiment, a time management function based on “JST_time” including information of 24 bits represented by six 4-bit binary-coded decimal numbers of MH-TOT is provided. You may use for each process which handles a presentation process or MH-EIT shown to FIG. 7E. In general, in the process of presenting the current time to the user in the broadcast receiving device, accuracy to less than a second is rarely required. Each time information described in the MH-EIT is 24-bit information represented by 6 4-bit binary-coded decimal numbers, like the EIT of the conventional digital broadcast transmitted by the MPEG2-TS system. Stored in “hour”, “minute”, and “second” in two decimal digits. For this reason, it is because the time management function based on MH-TOT in the broadcast receiving apparatus 100 of the present embodiment is easily consistent with each process that handles MH-EIT. Specifically, each process that handles the MH-EIT includes, for example, an electronic program guide generation process, a recording reservation or viewing reservation control, a copyright management process such as temporary storage. This is because the accuracy of subseconds is rarely required for any processing, and accuracy in units of one second is sufficient.

  In addition, the electronic program guide generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage, etc. are functions that are also installed in a receiver of a conventional digital broadcasting system using the MPEG2-TS system. It is. Then, also in the broadcasting system of the present embodiment, the conventional MPEG2-TS digital broadcasting system in processing such as electronic program guide generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage, etc. If it is configured so as to be compatible with time management processing that is consistent with the above, a broadcast receiving apparatus having both a conventional MPEG2-TS digital broadcast reception function and an MMT digital broadcast reception function is configured. This eliminates the need to design processing algorithms separately in these processes (electronic program guide generation processing, recording reservation and viewing reservation control, copyright management processing such as temporary storage, etc.) Can be lowered.

  In addition, even a receiver that does not have a conventional MPEG2-TS digital broadcast reception function but only an MMT digital broadcast reception function, generates an electronic program guide, and controls recording reservation and viewing reservation. Even if the algorithm for copyright management processing such as temporary storage is not completely newly created, the algorithm of the function installed in the receiver of the conventional digital broadcasting system using the MPEG2-TS system can be diverted. Can be developed at lower cost.

  Therefore, the time management function based on the “JST_time” parameter of the MH-TOT is used for these processes (electronic program guide generation process, recording reservation and viewing reservation control, copyright management process such as temporary storage). By adopting the configuration, even an MMT digital broadcast broadcast receiving apparatus can be provided at a lower cost by improving the consistency with the conventional broadcast system.

  As described above, the broadcast receiving apparatus 100 according to the present embodiment includes a time management function using two types of time information with different accuracy. That is, the first time information is notation time information consistent with the 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 the synchronization processing of each content data of the broadcast signal, the information presentation processing that is more advanced than the conventional broadcasting system is realized. By using it for copyright management processing such as control of viewing reservations, temporary storage, etc., it is possible to provide a broadcast receiving apparatus at low cost.

  Therefore, the broadcast receiving apparatus 100 according to the present embodiment can achieve both higher-level information presentation processing and cost reduction by providing the two types of time management functions described above.

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

  In the first modification, from the time management server (not shown) or the broadcast station server 300 to the broadcast receiving device 100 in order to increase the accuracy of the management time of the time management function based on NTP already described with reference to FIG. The information related to the estimated delay time in the time information transmission is transmitted by including in the broadcast signal, and the broadcast receiving apparatus 100 is configured to use the information related to the estimated delay time to correct the system clock of the time management function based on NTP. Also good.

  At this time, the information regarding the assumed delay time is not in the TLV multiplexed stream of the protocol stack in the broadcast transmission path shown in FIG. 3A, but in the TMCC (Transmission and Multiplexing Configuration Control) area outside the TLV multiplexed stream. You may comprise so that it may transmit. If the transmission is performed in the TMCC area, the broadcast receiving apparatus 100 can extract information on the estimated delay time without going through a TLV multiplexed stream separation process (demux process). That is, it is possible to acquire information that is not easily affected by the delay caused by the separation process in the broadcast receiving apparatus 100, and therefore it is possible to perform a highly accurate system clock correction process. An example of the data structure of time information transmitted by the TMCC signal will be described with reference to FIG. 12E. For example, the time information may be stored in the TMCC extended information area and transmitted. In the time information in the TMCC extended information area shown in the figure, the “delta” parameter is an estimated value of transmission delay from a time management server that delivers UTC or a server device that creates a TMCC signal to a general broadcast receiving device. Expressed in 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 the TMCC signal is transmitted from the server device in the NTP time stamp length format. The upper 32 bits represent the integer part, and the lower 32 bits represent the decimal part.

  In the first modification, the broadcast receiving apparatus 100 according to the present embodiment includes information on the estimated delay time described in the time information stored and transmitted in the TMCC extended information area (for example, the above-described “delta”). By using the parameter and / or “transmit_timestamp” parameter), the system clock of the time management function based on the NTP used for the synchronization processing of each content data of the broadcast signal can be corrected with higher accuracy.

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

  As described above, the broadcast receiving apparatus 100 according to the present embodiment has a time management function for managing the time by acquiring the current date and the Japan standard time based on information transmitted by MH-TOT. The current date and Japan standard time acquired by information transmitted by MH-TOT are superimposed on video information, application information, and the like by the video synthesizing unit 161 of the broadcast receiving apparatus 100, thereby being 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 acquire the current date and current 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, an overflow occurs with “April 22, 2038”, and the predetermined calculation is performed. The date after “April 23, 2038” alone cannot be expressed. Therefore, in the second modification of the present embodiment, the date after “April 23, 2038” is expressed by switching the calculation method between the case where the value of MJD is greater than or equal to the predetermined value and the case where it is less than the predetermined value. It shall be controlled as possible.

  FIG. 12F shows an example of the first calculation method used when the MJD value is greater than or equal to a predetermined value and the second calculation method used when the MJD value is less than the predetermined value. For example, when the predetermined value is “32768 (0x8000)”, when the MJD is “32768” or more, the current date is calculated using the first calculation method, and when the MJD is less than “32768”. Calculates the current date using the second calculation method. The case where MJD is less than “32768” is equivalent to the case where the most significant bit of 16-bit data of MJD is “0”. Thereby, in the broadcast receiving apparatus 100 of the present embodiment, it is possible to represent dates after “April 23, 2038”. However, the predetermined value can be arbitrarily set, and the predetermined value may be set to “16384 (0x4000)”, “49152 (0xC000)”, or the like. The calculation method switching condition 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”. When the above-mentioned means is used with the predetermined value being “32768”, dates before “September 4, 1948” cannot be expressed, but there is no particular problem in practical use as a television receiver. .

  Also, 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. You may make it switch said 1st calculation method and said 2nd calculation method according to the flag which replaced a part or all, or the newly added flag. For example, when the most significant bit of MJD 16-bit encoded data is “0”, the flag is set to “1” if the MJD indicates “April 23, 2038” or later. If it does not indicate “April 23, 2038” or later, “0” may be set. When the flag is “1”, the second calculation method shown in FIG. 12F may be used, and when the flag is “0”, the first calculation method may be used. Alternatively, a descriptor having the same meaning as the flag may be newly prepared and placed in the MH-TOT.

  In the broadcasting system of the present embodiment, as described above, the NTP format absolute time is transmitted, and the broadcast receiving apparatus 100 of the present embodiment has a time management function based on the NTP. Furthermore, in the broadcast receiving apparatus 100 according to the present embodiment, the decoding timing and presentation for each presentation unit of the video / audio signal are referred to by referring to the NTP timestamps described in the MPU timestamp descriptor set for each MPU. The timing is controlled. As described above, the time information in the NTP format has the configuration shown in FIG. 12B. The MPU time stamp descriptor has the configuration shown in FIG. 7D.

  For this reason, in the broadcast receiving apparatus 100 according to the present embodiment, the “reference_timestamp” parameter, the “transmit_timestamp” parameter, the “mpu_presentation_time” parameter, or the like is referred to, and the first reference is made according to the value of the referenced time data or the like. Either one of the calculation methods and the second calculation method may be selected. That is, for example, when the most significant bit of the 64-bit time data in the NTP length format is “0”, the second calculation method is used, and when it is not “0”, the first calculation method is used. And so on.

  In any of the above methods, the broadcast receiving apparatus 100 according to the present embodiment can represent dates after “April 23, 2038”.

[Broadcast receiving device channel selection processing (initial scan)]
The AMT of the broadcasting system according to the present embodiment provides a list of multicast groups of IP packets for receiving IP packets transmitted by the TLV multiplexing method as distinctly as possible from IP packets transmitted through a communication line. Shall. It is possible to list a plurality of IP multicast groups in one service identification. In addition, an address mask can be used to efficiently describe successive IP addresses.

  In the broadcast receiving apparatus 100 according to the present embodiment, a list of services acquired from the TLV-NIT is stored in a nonvolatile 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. And a list of IP multicast groups corresponding to the services can be stored in the nonvolatile memory in association with the services as IP related information. To do. By storing the list of services and IP-related information in a non-volatile memory so that they can be referred to at all times, there is no need to re-acquire TLV-NIT or AMT when switching channels, and broadcast contents can be acquired efficiently. Can be done.

  FIG. 13A is a diagram illustrating an example of an operation sequence at the time of channel scanning (rescanning) in the broadcast receiving apparatus 100 of the present embodiment.

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

  When the TLV-NIT acquired in the process of S103 is valid data (S104: Yes), the reception function execution unit 1102 acquires information such as a TLV stream ID and an original network ID from the acquired TLV-NIT. (S105). FIG. 13B shows an example of the data structure of TLV-NIT. The TLV stream ID information can be acquired from the “tlv_stream_id” parameter, and the original network ID information can be acquired from the “original_network_id” parameter. Furthermore, distribution system information regarding the physical conditions of the broadcast transmission path corresponding to each TLV stream ID / original network ID is acquired from the distribution system descriptor (S106), and a list of service IDs is acquired from the service list descriptor ( S107).

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

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

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

  When the process of S111 is completed, the reception function execution unit 1102 ends the process if the frequency value set in the tuner / demodulation unit 131 is the final frequency value in 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, when one TLV-NIT can acquire service IDs related to all the services constituting the broadcast network, and further can acquire an AMT having a list of IP multicast groups related to the service IDs, S112 to S113 No processing is required.

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

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

[Broadcast receiving device channel selection processing (channel switching)]
FIG. 14A is a diagram illustrating an example of an operation sequence at the time of channel selection (channel switching) in the broadcast receiving apparatus 100 of the present embodiment.

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

  Next, the reception function execution unit 1102 starts acquiring TLV-NIT from the reception signal of the tuner / demodulation unit 131. When acquisition of TLV-NIT is successful within a predetermined time (S205: Yes), distribution system information for acquiring an IP data flow corresponding to the service ID is acquired from the acquired TLV-NIT (S207). On the other hand, when the acquisition of TLV-NIT is not successful within a predetermined time (S205: No), the service ID stored in the ROM 103 or the storage unit 110 is referred to (S206), thereby corresponding to the service ID. Distribution system information for acquiring an IP data flow is acquired (S207). Note that the service list stored in the ROM 103 or the storage unit 110 may always be referred to without performing the determination process of S205.

  When the distribution system information is acquired in the process of S207, the reception function execution unit 1102 next controls the tuner / demodulation unit 131 with the frequency value indicated by the acquired distribution system information, and the service ID (S208), an MMT data string is extracted from the received IP data flow and output to the separation unit 132.

  In the separation unit 132, the transport processing unit 1102a acquires an MMTP packet with a packet ID “0” from the input MMT data string (S209), and further acquires an MPT included in the acquired MMTP packet. (S210). Next, the transport processing unit 1102a refers to the “MMT_package_id_byte” parameter of the acquired MPT, and confirms whether 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 have the same value as the service ID (S211: Yes), the MMTP packet whose packet ID is “0” It is determined that the packet is an MMTP packet having program data corresponding to the service ID, and the process proceeds to MFU acquisition processing based on the information of the acquired MPT.

  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 whose packet ID is “0” has the program data corresponding to the service ID. Judge that it is not a packet. In this case, the transport processing unit 1102a acquires the PLT again (S212), and checks the acquired PLT, thereby checking the packet ID of the MMTP packet that transmits the MPT having the “MMT_package_id_byte” parameter corresponding to the service ID. (X is assumed) is confirmed (S213). Further, the transport processing unit 1102a acquires an MMTP packet whose packet ID is “x” from the input MMT data string (S214), and acquires the MPT included in the acquired MMTP packet (S215). Furthermore, the MFU acquisition process is started based on the information that the acquired MPT has.

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

  Here, a process for acquiring the MPT by identifying the packet ID of the MMTP packet having the program data corresponding to the service ID by checking the PLT will be described. The MMTP packet with the packet ID “0” indicates that a PA message is transmitted. When a plurality of packages are multiplexed, as shown in FIG. 14B, this PA message includes a PLT (package list table). The PLT has a list of packet IDs of MMTP packets that transmit PA messages including MPTs of other packages, and by checking the PLT, the PA message including the MPT that is the entry point of each service from the package ID. It is possible to specify the MMTP packet that transmits. FIG. 14C shows an example of the data structure of PLT. It is assumed that the location information for transmitting the PA message of the package indicated by the “MMT_package_id_byte” parameter is 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 MPU presentation time is obtained from the MPU time stamp descriptor arranged in the MPT, and the MPU layout number is obtained from the MPU presentation area designation descriptor arranged in the MPT (S217, S218). An MFU is acquired based on the IP address and packet ID of the acquired IP data flow (S219). Next, encoded video data, encoded audio data, and the like are extracted from the acquired MFU, video / audio decoding processing is performed based on the control of the AV decoding processing unit 1102b, and the acquisition is performed under the control of the presentation processing unit 1102h. A presentation process based on information on presentation time and information on layout control is performed (S220).

  If the PLT cannot be acquired in the process of S212, and 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 processed in the process of S215. If it cannot be acquired, etc., the program output processing (that is, the processing of S216 to S220) based on the data of the MMTP packet whose packet ID acquired by the processing of S210 is “0” may be performed. . In this case, a message indicating that the program corresponding to the service ID selected by the user could not be displayed may be displayed.

  Through the series of processes described above, the broadcast receiving apparatus 100 according to the present embodiment can execute a channel selection (channel switching) operation. In particular, as described with reference to FIGS. 13A and 14A, a service list and IP-related information are created at the time of channel scanning at the time of initial setting or at the time of re-scanning for setting change, and the ROM 103 and the storage unit 110, which is stored in a non-volatile memory such as 110, and can always be referred to, and at the time of channel selection (channel switching), by referring to the service list and IP related information stored in the non-volatile memory such as the ROM 103 and the storage unit 110, This makes it 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 channel selection (channel switching) to the end of channel selection (channel switching), compared to the case where AMT and TLV-NIT are reacquired during channel selection (channel switching). Become.

[Remote control key setting process of broadcast receiver]
FIG. 15A shows an example of the appearance of a remote control (remote controller) 100R used for inputting operation instructions to the broadcast receiving apparatus 100 of the present embodiment. The remote controller 100R includes 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, and the like 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 the remote control 100R is used to instruct the broadcast receiving apparatus 100 of this embodiment to switch channels, the following three methods are used. May be used. The first method is to directly input and specify a service ID of a desired channel (service) by pressing the numeric keypad 100R2 a plurality of times. The second method is a method of performing forward (or backward) channel transmission until a desired channel (service) is displayed by repeatedly pressing the channel up / down key 100R3 as necessary. The third method is a method of performing so-called one-touch tuning, 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 an easy-to-use channel selection method, but it is necessary to set the association of a predetermined channel (service) to each key of the numeric keypad 100R2 in the broadcast receiving apparatus 100 in advance. is there.

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

  FIG. 15B shows an example of the data structure of the remote control key descriptor. The “service_id” parameter in the figure is a service ID for identifying a channel (service). The “remote_control_key_id” parameter is a recommended value of a remote control button number for assigning a channel (service) identified by the service ID. In accordance with the value of each parameter, 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.

  If the number of channels (services) in the same network is large, 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 numerical value corresponding to the “remote_control_key_id” parameter may be assigned to each key of the color key 100R8 in advance.

  The remote control key descriptor may be described as a TLV-NIT descriptor. Therefore, for example, when the TLV-NIT acquired in the processing of S103 in the operation sequence at the time of channel scanning shown in FIG. 13A is valid data, the description of the remote control key descriptor is combined with the processing of S105 to S107. The association may be set by storing the contents in a ROM 103 or a non-volatile memory such as the storage unit 110 of the broadcast receiving apparatus 100.

  In addition to the method of setting the association according to the description content of the remote control key descriptor as described above, the user appropriately assigns a service of an arbitrary channel to each key of the numeric keypad 100R2 according to his / her preference. It may be done by. Further, both the association setting according to the description content of the remote control key descriptor and the association setting assigned by the user according to preference are stored in the nonvolatile memory of the broadcast receiving apparatus 100 at the same time. Depending on the selection, only one setting may be used. In this case, the association setting 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 association setting according to the description content of the remote control key descriptor is prioritized over the association setting assigned by the user according to preference. And may be used. The priority flag may be set by using a 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, the priority flag value may be controllable for each service ID.

  In addition, when the association setting assigned by the user according to preference is stored in the nonvolatile memory, the association setting according to the description content of the remote control key descriptor is not stored in the nonvolatile memory. May be. Further, in the nonvolatile memory of the broadcast receiving apparatus 100, only the association setting assigned by the user according to preference is stored, and when the remote control key descriptor is described in the receiving TLV-NIT. If the remote control key descriptor is not described in the receiving TLV-NIT using the association setting according to the description content of the remote control key descriptor, the association assigned by the user according to preference is used. You may make it use a setting.

  The process of changing the association of a predetermined channel (service) with each key of the numeric keypad 100R2 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 for all services at the same time, or may be performed only for some services. When the above process is performed only for a part of services, the old setting may be held as it is for other services. Further, when the “service_id” parameter is a predetermined value (for example, 999), the setting designated by the “remote_control_key_id” parameter among the set contents stored in the nonvolatile memory of the broadcast receiving apparatus 100 You may make it erase only about.

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

[Multi-channel selection processing]
Also in the broadcasting system of the present embodiment, it is assumed that multi-organization in which a plurality of programs are broadcast in parallel on one channel (service) is possible. When simultaneous broadcasting of a plurality of programs by multi-organization is performed, it is conceivable that the above-described one-touch channel selection is possible only for a main channel of multi-organization and not for a sub-channel of multi-organization. That is, when selecting a multi-organization sub-channel, a method of directly inputting and specifying a service ID is used, or after selecting a multi-organization main channel by one-touch tuning, the channel up / down key 100R3 is used. It is necessary to use a method of selecting a desired subchannel by pressing, and there is a problem that the operation becomes complicated.

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

  This will be described using FIG. For example, it is assumed that the 011 channel service is assigned in advance to the “1” key of the numeric keypad 100R2 of the remote controller 100R. In this case, if the channel selection operation is in a state where multi-knitting is not performed (see (A) in the figure), the 011 channel is selected regardless of the number of times the “1” key is pressed. On the other hand, in the case of a channel selection operation in a multi-knitting state (see (B) in the figure), pressing the “1” key only once selects channel 011 and the first “1” key. If the “1” key is pressed again within a predetermined time from the pressing, the 012 channel is selected. Similarly, when the “1” key is pressed three times within a predetermined time, the 013 channel is selected. If the “1” key is pressed again after a predetermined time from the first pressing of the “1” key, the 011 channel may remain selected.

  By enabling the operation as described above, the broadcast receiving apparatus 100 according to the present embodiment enables direct channel selection of subchannels during multi-organization with a simpler operation.

  Similarly, angle selection of a multi-view compatible program or selection of a predetermined video asset from a plurality of video assets may be performed by repeatedly pressing the ten key 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, the multi-view compatible program is selected by pressing the “1” key only once. Assume that the main view is displayed. Further, when the “1” key is pressed again within a predetermined time after the first “1” key is pressed, the subview 1 of the multi-view compatible program is displayed. Similarly, when the “1” key is pressed three times within a predetermined time, the subview 2 of the multi-view compatible program is displayed. If the “1” key is pressed again after a predetermined time has elapsed since the first “1” key is pressed, 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 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 can select the angle of a multi-view compatible program or select a predetermined video asset from a plurality of video assets with a simpler operation. It is said.

  If one or more programs at the time of multi-organization are multi-view compatible programs or programs having a plurality of assets, only one of the above-described operations may be validated and the other may be invalidated. For example, if one or more programs at the time of multi-organization are multi-view compatible programs or programs having a plurality of assets, direct channel selection of sub-channels at the time of multi-organization is performed by pressing the same key multiple times within a predetermined time. To be assigned to the process. Which operation is valid or invalid may be determined in advance or may be selected by the user.

[Screen layout control of broadcast receiver]
In the broadcast receiving apparatus 100 of the present embodiment, it is assumed that screen layout control based on the description of LCT is possible. 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 designation descriptor.

  In the LCT data structure, in particular, the “left_top_pos_x” parameter and the “right_down_pos_x” parameter indicate the horizontal position at the upper left and the lower right when the left side of the full screen display is “0” / the right side is “100”. The horizontal position is indicated by a ratio to the total number of pixels in the horizontal direction. The “left_top_pos_y” parameter and the “right_down_pos_y” parameter indicate the vertical position at the upper left and the lower right of the area when the upper side of the full screen display is “0” / lower side is “100”. It shall be shown as a percentage of the total number of pixels. The “layer_order” parameter indicates the relative position in the depth direction of the region.

  An example of layout assignment to a layout number based on the setting of each parameter will be described below together with the setting values of each parameter.

  FIG. 17C is a default layout setting of the broadcast receiving apparatus 100 of the present embodiment, and is an example in which only one area is set on the entire screen. FIG. 17D shows an example in which the entire screen is divided into three areas, and the areas are “area 0”, “area 1”, and “area 2”. For example, when the number of pixels of the entire screen is set to 7680 horizontal / vertical 4320 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”. ”,“ Right_down_pos_y ”parameter is“ 80 ”, and is set in 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 shows an example in which three areas are set in the same manner as FIG. 17D. However, “area 0” is set in the range of (0,0) − (7679,4319), and “area 1” and “area” are set. “2” is in the same range as described above, and is arranged in front of “area 0” according to the setting of the “layer_order” parameter. FIG. 17F shows that “area 0” is set in device 0 (default device: broadcast receiving apparatus 100 in this embodiment), and “area 1” is set in device 1 (mobile information terminal 700 in this embodiment). This is an example of the case.

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

  It should be noted that a predetermined background color designated by the background color designation descriptor described in the LCT may be displayed in an area where the program video or data screen is not displayed by the screen layout control described above. Further, when the background color designation descriptor is not included in the LCT, when the broadcast receiving apparatus 100 cannot correctly obtain the background color designation descriptor, the predetermined background color designated by the background color designation descriptor is If the display is not possible due to hardware restrictions, the video display device 100 may display a predetermined pattern in the area. Further, the region may be used as a notification display region from the video display device 100 to the user. The notice may be arbitrary information.

  Note that fractions after the decimal point generated when the screen is divided according to the set value of the parameter such as “left_top_pos_x” may be rounded up or down. Rounding off (or rounding to zero in a binary number) may be used. For example, the number of pixels of 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”, “right_down_pos_y_ When the parameter is “51”, “Region 0” may be set in the range of (0, 0) − (3916, 2203) by rounding up processing, or (0, 0) − (3915, 2202) may be set to “area 0”. Further, rounding up / down processing in units of 8 pixels or 16 pixels may be performed in consideration of a macroblock in video compression processing. By the processing, it is possible to efficiently perform region setting based on LCT and resolution conversion processing of multimedia content in the region.

  Alternatively, the set value of the parameter such as “left_top_pos_x” may be limited to “multiple of 5” or “multiple of 10” in the range of “0” to “100”. Also in this case, the region setting can be suitably performed.

  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 related to the description of the LCT by the “layout_number” parameter and the “region_number” parameter.

  In addition, 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 the layout is determined according to any description. The user may be allowed to select whether to perform control. For example, in the first “for” loop, when the “layout_number1” parameter, the “region_number1” parameter, the “layout_number2” parameter, and the “region_number2” parameter are described for a predetermined “mpu_sequence_number” parameter, Let the user select whether to perform layout control of the MPU specified by the “mpu_sequence_number” parameter based on the “layout_number1” parameter and the “region_number1” parameter, or based on the “layout_number2” parameter and the “region_number2” parameter, etc. It is. In this way, the user can perform layout control related to the video program according to his / her preference.

[Exceptional processing for screen layout control of broadcast receivers]
In the broadcast receiving apparatus 100 of the present embodiment, even when the area control of the screen layout is performed by the above-described LCT, when the display of the EPG screen is instructed by the user, as an exception process, 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 for screen layout control based on LCT.

  The screen layout control similar to that of FIG. 17D is performed by the description of LCT, the broadcast program video is displayed in “Area 0”, and the program linkage data linked to the broadcast program is broadcast in “Area 1” and “Area 2”. When the user instructs display of the EPG screen with a remote controller (not shown) while the content is displayed, the broadcast receiving apparatus 100 according to the present embodiment describes 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 control similar to that in FIG. 17C is performed), and the EPG screen is controlled to be displayed on the entire screen. Further, when the user instructs the display end of the EPG screen, the screen layout control according to the description content of the LCT is re-executed.

  By performing the above-described control, the EPG screen can be displayed larger than the case where the EPG screen is displayed while maintaining the area control of the screen layout as shown in FIG. 18A (B). It is possible to improve visibility.

  The screen layout control exception process is not applied only when displaying an EPG screen. As shown in FIG. 18B, various setting screens of the broadcast receiving apparatus 100 (in the illustrated example, a recording setting screen). ) May be applied when a sub-screen is displayed or when a two-screen is displayed.

  In the case of the recording setting screen shown in FIG. 5A, the broadcast content display area is changed from the entire screen to only the sub-screen portion at the lower right of the screen. Similarly, in the case of the two-screen display shown in FIG. 5B, the broadcast content display area is changed from the entire screen to only the divided screen portion on the left side of the middle stage of the screen. In any case, since the display area for displaying the broadcast content is narrower than when the entire screen is used, the area control of the screen layout is maintained in the display area (that is, the area division is performed). It is not preferable from the viewpoint of visual recognition that a plurality of broadcast contents are displayed 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. Note that the broadcast content of “region 1” or “region 2” may be selected and displayed according to the immediately preceding region selection situation.

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

[Video signal aspect ratio conversion processing]
The aspect ratio of the video signal in the TV broadcasting service includes “4: 3” used in the conventional SDTV, “16: 9” used in the recent HDTV, and “21: 9” suitable for movie contents. ”, 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 of the data structure of the video component descriptor. In the figure, the “video_aspect_ratio” parameter is information relating to the aspect ratio of the video signal. FIG. 19B shows an example of the meaning of the “video_aspect_ratio” parameter. An aspect ratio different from that shown may be further assigned.

  On the other hand, the aspect ratio of the display unit of a television receiver (such as the broadcast receiving device 100 of this embodiment) that can receive the television broadcast service 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, an aspect ratio conversion process may be performed.

  Whether or not to perform the aspect ratio conversion process may be determined by comparing the specification of the monitor unit 162 of the broadcast receiving apparatus 100 with 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 pixels × 2160 pixels, etc.), the value of the “video_aspect_ratio” parameter is “0”, “2”, “ If “3”, the aspect ratio conversion process is not performed, and if “1” or “5”, the aspect ratio conversion process is performed. For example, when the aspect ratio of the monitor unit 162 of the broadcast receiving apparatus 100 is “21: 9” (width 5040 pixels × length 2160 pixels, etc.), the value of the “video_aspect_ratio” parameter is “0” or “5”. Then, the aspect ratio conversion process is not performed, and if “1”, “2”, or “3”, the aspect ratio conversion process may be performed.

  An example of the aspect ratio conversion process 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” is shown in FIGS. 19C and 19D. When video content having an aspect ratio of “21: 9” is displayed on the monitor unit 162 having an aspect ratio of “16: 9”, by adding black bands above and below the video content having an aspect ratio of “21: 9”, the aspect ratio May be converted to “16: 9” (display A in the figure). In this way, the entire area of the original video content can be displayed without distortion. Alternatively, only the central portion of the video content having the aspect ratio “21: 9” may be cut out and displayed on the monitor unit 162 (display B in the figure). In this way, it is possible to display a large part of the original video content. Further, a little black band may be added to the top and bottom of the video content having the aspect ratio “21: 9” to further cut out the center portion (display C in the figure). In this way, it is possible to display a large portion of the original video content. Further, the left and right ends of the video content having the aspect ratio “21: 9” may be compressed to display the entire area (display D in the figure). In this way, the entire area of the original video content can be enlarged and the main part can be displayed without distortion. Further, a little black belt may be added to the top and bottom of the video content having the aspect ratio “21: 9”, and the entire left and right ends may be further compressed (display E in the figure). In this way, the entire area of the original video content can be enlarged and displayed with less distortion at the left and right ends.

  How the aspect ratio conversion process is performed may be selectable by the user by setting a menu or the like. Alternatively, it may be switched by pressing a predetermined key on a remote controller or the like. Note that the aspect ratio “21: 9” includes an aspect ratio of approximately “21: 9” such as a so-called cinemascope “2.35: 1”. The same applies to other aspect ratio values.

[EPG display of broadcast receiver]
In the broadcasting system of the present embodiment, it is assumed that time-series information regarding events (so-called programs) included in each service constituting the broadcasting network is transmitted by MH-EIT. The MH-EIT shown in FIG. 7E is identified into two classes by the table ID (corresponding to the “talbe_id” parameter in the figure), and information on the current / next event of the own TLV stream and each event of the own TLV stream. It is possible to show schedule information. The broadcast receiving apparatus 100 according to the present embodiment performs identification by service ID (corresponding to the “service_id” parameter in the figure) with reference to the MH-EIT or the like, thereby providing information such as the start time and broadcast time of each event. The EPG screen can be created by acquiring the EPG, and the created EPG can be displayed on the monitor unit 162 by superimposing the created EPG on the video information or the like by the video composition unit 161.

  FIG. 20A is a diagram illustrating an example of an EPG screen in the broadcast receiving apparatus 100 according to the present embodiment. The EPG screen 162a has a matrix shape with the vertical axis representing time and the horizontal axis representing service ID (channel), and displays detailed information of broadcast programs broadcast on each channel in each time slot. 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 described in the MH-short format event descriptor or the MH-extended event descriptor and distributed. When there is a large amount of program information or the like described in each of the descriptors, abbreviated display is normally performed, and all program information may be displayed by a pop-up or the like when selected by operating a remote controller (not shown). . Alternatively, at the time of selection, the program information described in each descriptor may be transmitted to the portable information terminal 700 that is operating in cooperation, and the portable information terminal 700 may be instructed to be displayed 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, symbols representing the attributes of the broadcast program, and the like are displayed. The symbol or the like indicating the attribute of the broadcast program is, for example, a symbol / character indicating a new program, a symbol / character indicating a re-broadcast program, or the like. Alternatively, it may be a sign or the like that symbolizes “data” meaning that it corresponds to data broadcasting by a broadcasting service. Moreover, the mark 162a4 etc. which symbolized "NetWork" which means that the content, application, etc. relevant to the said broadcast program are acquirable from a network may be sufficient. Further, 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, symbols or the like representing the attributes of the broadcast program may be substituted.

  This is a case where each control information (message, table, descriptor, etc.) in the broadcasting system of the present embodiment indicates that content, application, etc. related to the broadcast program can be acquired from the network. However, if the LAN communication unit 121 of the broadcast receiving apparatus 100 is not connected to the LAN communication unit 121 and cannot access each server apparatus on the network, the mark 162a4 symbolized “NetWork” is used. Etc. may be controlled so as not to be displayed.

  In addition, the broadcast program is a distribution program distributed via the Internet 200 and cannot be obtained only from the broadcast wave. Further, as described above, the broadcast receiving device 100 is connected to each server device on the network. For example, when it is in an inaccessible state, the detailed information 162b1 displayed on the EPG screen 162b may be grayed out as shown in FIG. 20B. That is, control is performed so as not to display the detailed information of the distribution program that cannot be viewed. Further, the background color of the detailed information 162b1 may be differentiated from the others to replace the grayout process. Alternatively, a message such as “This program cannot be viewed” may be displayed in the detailed explanation area 162a3 of the distributed program. When the detailed information 162b1 is selected by operating the remote controller (not shown), the broadcast receiving device 100 is in a state where it cannot access each server device on the network, or the distribution program associated with the detailed information 162b1 is viewed. You may make it alert | report to a user by a popup etc. that it cannot do.

  Through the above-described controls, the broadcast receiving apparatus 100 can provide program information of each broadcast program in a format that is less uncomfortable to the user according to the network connection status.

  FIG. 20C is a diagram illustrating another example of the EPG screen in the broadcast receiving device 100 according to the present embodiment. In the figure, “M1 TV”, “M2 Broadcast”, “M3 Channel”, “M4TV”, “TV M5”, etc. are broadcast station names of each channel. It is assumed that a broadcast program to be distributed and a distribution program distributed via the Internet 200 (frame information 162c1 indicated by “net broadcast” 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, all channels (including information 162c1) are normally displayed as shown in the EPG screen 162c of FIG. Control to display the information. On the other hand, when the broadcast receiving device 100 cannot access each server device on the network, as shown in the EPG screen 162d of FIG. Control may be performed so as not to display the channel information (information 162c1 in FIG. 1A) of “M2 broadcast (net broadcast)”.

  With the above-described controls, the user of the broadcast receiving apparatus 100 can make it unnecessary to confirm information on channels that cannot be viewed by the user.

[Emergency warning broadcast display of broadcast receiver]
The broadcast receiving apparatus 100 according to the present embodiment performs emergency alert broadcast reception processing when the emergency alert 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.

  The emergency alert broadcast may be provided as a broadcast program of a dedicated channel (service ID), may be provided as a full-screen display application, or may be provided as character information at a character supermarket. When the emergency alert broadcast is provided as text information at the text superimpose, it is preferable to display the text information of the text supermarket regardless of the state of the broadcast receiving apparatus 100 immediately before receiving the emergency alert broadcast. That is, as shown in FIG. 21, when a user views a normal broadcast program and receives an emergency warning broadcast in a state where the broadcast program screen 162e is displayed on the monitor unit 162, the emergency warning broadcast The character information 162e1 is displayed superimposed on the program screen 162e. Similarly, when the user gives an instruction to display the EPG screen and the emergency warning broadcast is received while the EPG screen 162f is displayed on the monitor unit 162, the character information 162f1 by the emergency warning broadcast is superimposed on the EPG screen 162f. Control to display.

  By 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., an emergency warning broadcast Is received, it is possible to avoid overlooking important text information based on the emergency alert broadcast. Note that this control may be performed on character information of a normal character supermarket that is not based on emergency alert broadcasting.

  Further, when the emergency alert broadcast is provided as a broadcast program of a dedicated channel (service ID), the emergency alert broadcast channel (service ID) is set regardless of the channel (service ID) of the currently viewed program. Automatic tuning may be performed. Further, when the emergency alert broadcast is provided as a broadcast program of a dedicated channel (service ID) or as an application, an external portable terminal device (in this embodiment) is linked under the control of the linkage function execution unit 1103. , The emergency warning broadcast program or application may be distributed to the portable information terminal 700 or the like.

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

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

[Display control exception handling]
The broadcast receiving apparatus 100 according to the present embodiment may perform exception processing as described below, for example, when data transmitted through a route other than the TLV stream cannot be acquired among the data configuring the same package.

  As described with reference to FIG. 7A, in the broadcast system supported by the broadcast receiving apparatus 100 of the present embodiment, the data acquired from the TLV stream and the TLV stream based on the location information stored in the MPT (see FIG. 7C). Data acquired from other routes can be included in the same package. However, data transmitted via a data transmission path other than the TLV stream (for example, IPv4 data flow or IPv6 data flow of a communication line, MPEG2-TS of broadcasting, etc.) indicated by the location information has a function of receiving a TLV / MMT stream. Is data acquired by another receiving function. Therefore, even when the broadcast receiving apparatus 100 is in operation, the reception function of these transmission paths is not operating, or the relay apparatus on the transmission path is operating even though the receiving function itself is operating. Data acquisition from these transmission paths, such as a situation where there is no wired or wireless connection of these transmission paths, or a situation where the broadcast receiving apparatus 100 is installed in an environment where these transmission paths cannot be connected in the first place There may be situations where you can't.

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

  For example, as shown in FIGS. 17D and 17E, the LCT sets a plurality of areas in the screen, displays a program video based on the data acquired from the TLV stream in “area 0”, and displays “area 1” and When “area 2” is associated with content based on data acquired from a transmission path other than the TLV stream, other than the TLV stream to be displayed in “area 1” or “area 2” If the transmission path data cannot be acquired, the layout display of a plurality of areas designated 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 “area 0” of the default layout display shown in FIG. What is necessary is just not to shift to the layout display of such multiple areas. Further, 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 illustrated in FIG. Switching to a data broadcasting screen may be performed so as not to shift to a layout display of a plurality of areas as shown in FIGS. 17D and 17E.

  Also, as shown in FIG. 17D and FIG. 17E, the LCT sets a plurality of areas in the screen, displays a program video based on the data acquired from the TLV stream in “area 0”, and displays “area 1” and When “area 2” is associated with content based on data acquired through a transmission path other than the TLV stream, other than the TLV stream to be displayed in “area 1” or “area 2” As another example of the operation when the data of the transmission path cannot be acquired, the display frames of the plurality of areas shown in FIGS. 17D and 17E indicated by the LCT are temporarily displayed, and the background colors of “area 1” and “area 2” are displayed. Or when a predetermined still image is displayed and data of a transmission path other than the TLV stream indicated by the MPT location information cannot be acquired even after a predetermined time has elapsed, the default shown in FIG. It may be subjected to a display switching back to the layout view of the state. In this case, the TLV stream is also transferred to “area 0” of each layout when the layout of FIG. 17C is changed to the layout of FIG. 17D or 17E and when the layout of FIG. 17D or 17E is changed to the layout of FIG. 17C. If it operates so that the program video based on the data acquired from can be continuously displayed, it is preferable because the user can continue watching the program video.

  In addition, since the data of the transmission path other than the TLV stream to be displayed in “area 1” or “area 2” cannot be acquired, the data acquired from the TLV stream in “area 0” of the default layout display illustrated in FIG. The operation of various communication functions and various reception functions of the broadcast receiving apparatus 100 according to the present embodiment is started when the program video based on the program is displayed, and the communication environment / communication status and various reception functions of the various communication functions are started. As the reception environment / reception status of the network changes, there may be a situation where data on a transmission path 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 according to the present embodiment immediately switches from the default layout display shown in FIG. 17C to the layout of a plurality of areas shown in FIG. 17D and FIG. The program video based on the data acquired from the TLV stream may be displayed, and the content based on the data acquired from the transmission path other than the TLV stream may be displayed in “area 1” or “area 2”. Alternatively, the layout change may be executed after an instruction to change from the default layout to the layout indicated by the LCT is input from the operation input unit 170 without performing the layout change immediately. 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 supported by the broadcast receiving apparatus 100 according to the present embodiment, by transmitting the MPT or the like including the copy control information, for example, “unlimited copying is possible” (“unlimited copying is possible and encryption is performed during storage and output. Can be divided into two types: “copying required without limitation and encryption processing not required during storage and output”), “copying for only one generation”, “copying a predetermined number of times” (for example, 9 times) The copy control state of the content referred to by the MPT or the like may be indicated, such as “copy possible + movable once”, so-called “dubbing 10”) or “copy prohibited”. In this case, the broadcast receiving apparatus 100 according to the present embodiment stores the content in the storage (storage) unit 110, records it on a removable recording medium, outputs it to an external device, and sends it to an external device according to the copy control information. It may be configured to control copying, moving processing to an external device, and the like.

  The target of the accumulation process is not only the storage (accumulation) unit 110 inside the broadcast receiving apparatus 100 but also a removable recording medium subjected to a protection process such as an encryption process that can be reproduced only by the broadcast receiving apparatus 100, An external device etc. may be included. Specifically, for example, an external recording device such as an HDD connected to the extension interface unit 124 that can be recorded and reproduced only by the broadcast receiving device 100 is 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 is possible”, the broadcast receiving apparatus 100 of the present embodiment accumulates in the storage (accumulation) unit 110, records in a removable recording medium, and externally. The output to the device, the copy to the external device, the move process to the external device, etc. may be performed without limitation. However, the control based on the copy control information is divided into “unlimited copy is possible and encryption processing is required for storage and output” and “unlimited copy is possible and encryption processing is not required for storage and output”. , When “Unlimited copy is possible and encryption is required during storage and output”, storage in the storage (storage) unit 110, recording on a removable recording medium, output to an external device, copy to an external device The move processing to the external device can be performed without limitation, but all of them need to be encrypted.

  When the copy control information included in the MPT or the like indicates “copying is possible for only one generation”, the broadcast receiving apparatus 100 according to the present embodiment stores encrypted data in the storage (storage) unit 110 or receives broadcast data. Recording on a removable recording medium that has been subjected to protection processing such as encryption processing that can be reproduced only by the apparatus 100 may be possible. In addition, when the stored content is output to an external device for viewing, the content is encrypted and output together with copy control information of “copy prohibited”. In addition, a so-called move process to an external device (a process of copying content to the external device and making the content in the storage (storage) unit 110 of the broadcast receiving apparatus 100 unplayable by an erasure process or the like) is possible.

  When the copy control information included in the MPT or the like indicates “copying is allowed a predetermined number of times”, the broadcast receiving apparatus 100 according to the present embodiment encrypts and stores the data in the storage (accumulation) unit 110 and broadcast reception. Processing for recording on a removable recording medium subjected to protection processing such as encryption processing that can be reproduced only by the apparatus 100 may be possible. In addition, when the stored content is output to an external device for viewing, the content is encrypted and output together with copy control information of “copy prohibited”. Further, a predetermined number of times of copying and moving to an external device may be possible. In the case of so-called “dubbing 10”, it is possible to perform nine copies to an external device and one move process.

  When the copy control information included in the MPT or the like indicates “copy prohibited”, the broadcast receiving apparatus 100 of this embodiment prohibits accumulation (copying) in the storage (accumulation) unit 110 or the like. However, the broadcast receiving apparatus 100 stores (accumulates) only for a predetermined time determined in advance or for a predetermined time specified by control information included in the broadcast signal (for example, based on an MH-Expire descriptor, a content use control descriptor, etc.). ) It may be configured to have a “temporary storage” mode that enables holding in the unit 110 or the like. In this case, the broadcast receiving apparatus 100 can temporarily hold the content in the storage (storage) unit 110 or the like even when the copy control information included in the MPT or the like indicates “copy prohibited”. And When the content whose copy control information included in MPT or the like is “copy prohibited” is output to an external device for viewing, the content is encrypted and output together with the copy control information “copy prohibited”.

  Note that the output for viewing to the external device described above is transmitted via the video output unit 163 and the audio output unit 166 of the broadcast receiving apparatus 100 of the present embodiment, the digital I / F unit 125, the LAN communication unit 121, or the like. Just do it. The copying or moving process 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 the present embodiment. The “digital_recording_control_data” parameter in the figure is 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, when the parameter is “00”, it indicates “unlimited copying is possible”, when the parameter is “01”, definition by the operator is possible, and when the parameter is “10” “Copying only one generation” is indicated, and when the parameter is “11”, “copy prohibited” is indicated. 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 the figure is the copy restriction mode and indicates whether or not the number-limited copy is possible.

  In the broadcast receiving apparatus 100 according to the present embodiment, it is assumed that when the digital copy control information is “01”, it is possible to execute a storage process that allows a predetermined number of copies to be made in advance determined by the broadcaster. Alternatively, when the digital copy control information is not “11” and the copy restriction mode indicates that the number-restricted copy is permitted, it is possible to execute a storage process that allows a predetermined number of copies to be made in advance determined by the broadcaster. Also good. Alternatively, in this case, the number of possible copies for each content may be specified by using a part or all of the “reserved_future_use” parameter of the digital content usage descriptor.

  Through the above processing, the broadcast receiving apparatus 100 according to the present embodiment can realize the content copy control of “copying a predetermined number of times” described above.

  Further, when the “retention_mode” parameter in the content usage control descriptor shown in FIG. 23 is a temporary storage control bit and the digital copy control information indicates “copy prohibited”, temporary storage of the target content is permitted. It indicates whether or not to do. In addition, the “retention_state” parameter is the temporary storage allowable time, and the temporary storage allowable bit indicates the temporary storage allowable time when the target content is temporarily stored.

  In the broadcast receiving apparatus 100 according to the present embodiment, the temporary copy when the digital copy control information of each content indicates “copy prohibited” by referring to the information of the temporary storage control bit and the temporary storage allowable time. It is possible to control whether or not the data can be stored and its storage 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 according to the present embodiment performs image quality restriction on the target content when outputting the target content to an external device. It should be noted that the image quality restriction is not necessary when storing in the storage (storage) unit 110 or the like. The image quality limitation is, for example, converted from received (or accumulated) UHD (7680 pixels × 4320 pixels) video content to SHD (3840 pixels × 2160 pixels) video, or output HD (1920 pixels × 1080). Pixel) video is converted into SD (640 pixels × 480 pixels) video and output, and so on. It should be noted that to what extent the image quality of the target content is restricted, that is, to which resolution the image quality after the image quality restriction is to be specified is specified by using a part or all of the “reserved_future_use” parameter of the digital content usage descriptor. You may do it.

  Similar to the above, for example, a frame rate limit bit and a pixel resolution limit bit are prepared using part or all of the “reserved_future_use” parameter, and when outputting content to an external device, the frame rate limit and the pixel resolution limit are set. You may make it control. When the frame rate limit bit indicates that the frame rate needs to be limited, the broadcast receiving apparatus 100 according to 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. In addition, when the pixel resolution limit bit indicates that the pixel resolution needs to be limited, the broadcast receiving device 100 according to the present embodiment, when outputting the target content to the external device, each pixel of the target content. The resolution is limited. For example, each pixel of video content in which each pixel is composed of 12 bits is converted into 8 bits and output.

  Further, a resolution limiting control flag, a frame rate limiting control flag, and a pixel resolution limiting control flag are prepared by using a part or all of the “reserved_future_use” parameter, and the resolution limiting control flag, the frame rate limiting control flag, the pixel Whether or not to limit the image quality, the frame rate, or the pixel resolution may be controlled according to the resolution limit control flag. For example, when the resolution restriction control flag indicates that the resolution restriction control is performed according to the interface specification, the image quality restriction is not performed if the interface for outputting the target content has a predetermined content protection technology. If the content protection technology is not provided, control may be performed so as to perform the image quality restriction.

  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 performing the image quality restriction. If the HDMI interface HDCP version 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 the interface for outputting the target content is provided with a predetermined content protection technology, or depending on the version of the content protection technology if the content protection technology is provided. It is sufficient to control whether or not to limit the image quality of the target content. When the resolution restriction control flag does not indicate that the resolution restriction control is performed according to the interface specification, the presence / absence of the image quality restriction may be controlled according to only the resolution restriction bit. Similar processing may be performed for the frame rate limiting control flag and the pixel resolution limiting control flag.

  In addition, the above-described copy control information indicates that content that indicates copy restrictions such as “copying is allowed for only one generation”, “copying for a predetermined number of times”, “copying prohibited”, etc., to the external device via the LAN communication unit 121. Copy processing is possible only when the IP address of the external device that is the destination of the transmission packet from the broadcast receiving device 100 is in the same subnet as the IP address of the broadcast receiving device 100, and the IP address of the external device is broadcast. If it is outside the same subnet as the IP address of the receiving apparatus 100, it may be prohibited. Content whose copy control information is “unlimited copy is possible and encryption processing is required during storage and output” may be handled in the same manner.

  Similarly, the content in which the above-mentioned copy control information indicates copy restrictions such as “copying is possible for only one generation”, “copying is allowed a predetermined number of times”, “unlimited copying is possible and encryption processing is required during storage and output”, etc. Is stored in the storage (storage) unit 110, and the IP address of the external device that is the destination of the transmission packet from the broadcast receiving device 100 is also used for the move processing and copy processing to the external device via the LAN communication unit 121. 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.

  In addition, viewing video output and audio output for content stored in the storage (storage) unit 110 of the broadcast receiving apparatus 100 are, in principle, the IP address of the external device that is the destination of the transmission packet from the broadcast receiving apparatus 100, This is possible only when the IP address of the broadcast receiving apparatus 100 is within the same subnet, and is prohibited when the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving apparatus 100. However, registration processing as a device in which the external device is connected within the same subnet as the IP address of the broadcast receiving device 100 within a predetermined period and can be viewed 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 to the external device is performed. ) Unit 110 may be configured to enable viewing video output and audio output for content stored in unit 110. In this case, the viewing video output and audio output are performed by encrypting the content.

  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 the output protection of the IP interface output is required, the encryption process is performed, and the output protection of the IP interface output is not required The viewing video output and audio output may be performed without performing the encryption process. Further, when the value of the “encryption_mode” parameter indicates that output protection of the IP interface output is required, an encryption process is performed by using a part or all of the “reserved_future_use” parameter of the content usage control descriptor. An IP address range of an external device that can perform the viewing video output and audio output without performing the above may be designated. That is, for a predetermined IP address determined in advance, 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.

  Further, a period during which the registration process (pairing) is valid may be specified by using a 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 external device registration processing (pairing) is performed is within the specified period, the external device is included even if the external device is outside the same subnet as the IP address of the broadcast receiving device 100. Control may be made so that viewing video output and audio output to the device are allowed and not allowed outside the specified period.

  Further, the above-described move processing, copy processing, output processing, and the like of content to the 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, if the value of the “remote_view_mode” parameter does not permit remote viewing of the target content, all of the content move processing, copy processing, output processing, etc. to the external device via the LAN communication unit 121 are performed. You may control to prohibit.

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

<Exception processing for content copy control 1>
In the data structure of the content copy control descriptor shown in FIG. 22A, the first digital copy control information (the “digital_recording_control_data” parameter located immediately after “descriptor_length”) is copy generation control information related to the entire content. The second digital copy control information (the “digital_recording_control_data” parameter located immediately after “component_tag”) is copy generation control information for each component constituting the content. Note that each component is specified by a “component_tag” parameter.

  In the broadcasting system of the present embodiment, when the copy generation of the entire content (program) is controlled, only the first digital copy control information is described in the content copy control descriptor, and the first digital copy The copy generation is controlled by the control information. On the other hand, when performing copy generation control for each component constituting the content, describe both the first digital copy control information and the second digital copy control information in the content copy control descriptor, Control copy generation. Further, 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. The situation is possible. In the situation described above, the broadcast receiving apparatus 100 of the present embodiment may perform the following operation.

  First, in the first operation example, when the descriptions of the first digital copy control information and the second digital copy control information do not match, the copy generation control indicated in the first digital copy control information is performed. This is a method of performing control based on the above. In this case, simple copy generation control common to each component constituting the same content can be performed.

  Next, in the second operation example, when the descriptions of the first digital copy control information and the second digital copy control information do not match, the copy generation indicated in the second digital copy control information is displayed. In this method, control is performed so as to operate based on the control. In this case, even for components constituting the same content, different copy generation control is possible for each component, that is, more precise copy generation control is possible.

  Further, in the third operation example, when the descriptions of the first digital copy control information and the second digital copy control information do not match, the stricter condition of the two different digital copy control information This is a method for performing control based on digital copy control information. For example, when one is “unlimited copy is possible” and the other is “1 generation can be copied”, the information of “1 generation can be copied” is followed. Or, when one is “copying a predetermined number of times” and the other is “copy prohibited”, the information of “copy prohibited” is followed. Or, in the case of both “copying a predetermined number of times”, the information of the smaller number of times that can be copied is specified separately. In this case, stricter copy generation control is possible.

  By performing the above processing, the broadcast receiving apparatus 100 according to the present embodiment can operate favorably even when two different digital copy control information are described in the content copy control descriptor.

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

  First, when copy control information is included in MPT or the like, the data included in the same package and the same event in the location information is different from the data acquired by the TLV stream of the broadcast route (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 status of the specified content based on these copy control information is “Unlimited copy allowed” (“Unlimited copy allowed and encryption required during storage and output”) and “Unlimited copy allowed” In addition, it may be divided into two types, “no encryption processing is required at the time of storage and output”), “copying is possible for only one generation”, “copying for a predetermined number of times” (for example, copying is possible 9 times + movement is allowed once) “Dubbing 10”), “copy prohibited”, etc. can be specified.

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

  In the digital broadcasting system of 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 MPEG2-TS data transmitted by another digital broadcast signal is included in the data included in the same package and the same event as the location information, MPEG2 Control is performed with priority given to 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 is permitted”, and the copy control status indicated by the copy control information included in the MPEG2-TS is “predetermined multiple times of copying”. If there is, even if it is data acquired by a different route (MPEG2-TS transmission format digital broadcasting) from the data acquired by the TLV stream, the copy control may be performed as the content of “one generation copy is possible”. For example, the copy control state indicated by the copy control information included in the TLV stream is “unlimited copying is allowed”, and the copy control state indicated by the copy control information included in the MPEG2-TS is “predetermined to allow multiple times of copying”. If there is, even if the data is acquired through a different route (MPEG2-TS transmission format digital broadcasting) from the data acquired by the TLV stream, the copy control may be performed as the content of “unlimited copying”.

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

<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 location in the location information includes MPEG2-TS data transmitted by another digital broadcasting signal, TLV The copy control status indicated by the copy control information included in the stream is compared with the copy control status indicated by the copy control information included in the MPEG2-TS, and the copy control status indicated by the copy control information included in the MPEG2-TS is compared. If this is stricter than the copy control state indicated by the copy control information included in the TLV stream, the storage process to the storage (storage) unit 110, the recording process to the removable recording medium, or the output process from the digital interface is performed. Process the MPEG2-TS data It operates to exclude the elephants content.

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

  Further, as a result of the comparison, when the copy control state indicated by the copy control information included in the MPEG2-TS is the same as the copy control state indicated by the copy control information included in the TLV stream or a looser copy control state For the MPEG2-TS data included in the same package and the same event in the location information, copy control may be performed as content in the copy control 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, copying on the broadcast receiving apparatus 100 of this embodiment is performed while respecting the original copy control information set in the broadcast system that transmits the data. Duplicate control states can be eliminated.

  In the above description, the copyright protection function of the broadcast receiving apparatus 100 of the present embodiment has been described as being performed based on the copy control information included in the MPT. However, the table for arranging copy control information is not limited to MPT. In addition to the MPT, the MH-service description table (MH-SDT), the MH-event information table (MH-EIT) described in FIG. You may perform a copyright protection process.

  According to the present embodiment described above, a broadcast receiver compatible with MMT digital broadcasting can be provided.

(Example 2)
Hereinafter, Example 2 of the present invention will be described. Note that the configuration, processing, effects, and the like in this embodiment are the same as those in the first embodiment unless otherwise specified. For this reason, below, the difference between a present Example and Example 1 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible. In the following description, the broadcast receiving apparatus according to the present embodiment is a television receiver that supports both the MMT system and the MPEG2-TS system as the media transport system.

[Hardware configuration of broadcast receiver]
FIG. 24 is a block diagram illustrating an example of an internal configuration of the broadcast receiving apparatus 800. The broadcast receiving apparatus 800 includes a main control unit 801, a system bus 802, a ROM 803, a RAM 804, a storage unit 810, a LAN communication unit 821, an expansion interface unit 824, a digital interface unit 825, a first tuner / demodulation unit 831, a second tuner / Demodulator 832, MMT decode processor 841, MPEG2-TS decode processor 842, video synthesizer 861, monitor 862, video output 863, audio synthesizer 864, speaker 865, audio output 866, operation input 870 , Composed 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, Are the main control unit 101, system bus 102, ROM 103, RAM 104, storage (storage) unit 110, expansion interface unit 124, digital interface unit 125, monitor unit 162, video output unit 163 in the broadcast receiving apparatus 100 of the first embodiment. The speaker unit 165, the audio output unit 166, the operation input unit 170, and the like have the same functions, and detailed description thereof is omitted.

  The first tuner / demodulator 831 receives a broadcast wave of a broadcast service that employs MMT as a media transport method via an antenna (not shown), and a service desired by the user based on the control of the main controller 801. (Tune to) the selected channel. Further, the first tuner / demodulator 831 demodulates the received broadcast signal to acquire an MMT data string, and outputs it to the MMT decode processor 841. The second tuner / demodulation unit 832 receives a broadcast wave of a broadcast service that employs MPEG2-TS as a media transport method via an antenna (not shown), and receives a user's request based on the control of the main control unit 801. Tune in (tune to) the channel of the service you want to use. Further, the second tuner / demodulation unit 832 demodulates the received broadcast signal to acquire an MPEG2-TS data string, and outputs it to the MPEG2-TS decode processing unit 842.

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

  The MPEG2-TS decoding processing unit 842 receives the MPEG2-TS data sequence output from the second tuner / demodulation unit 832 and, based on the control signal included in the MPEG2-TS data sequence, video data that is a real-time presentation element Separation processing, decoding processing, and the like of columns, audio data sequences, character super data sequences, caption data sequences, and the like are performed. The MPEG2-TS decoding processing unit 842 has a function equivalent to an IRD (Integrated Receiver Decoder) unit of a conventional television receiver that receives broadcast waves of a broadcasting service that employs MPEG2-TS as a media transport system. Detailed description is omitted.

  The video composition unit 861 inputs the video information, subtitle information, and application information output from the MMT decode processing unit 841, and the video information, subtitle information, and application information output from the MPEG2-TS decode processing unit 842. Processing such as selection and / or superimposition is performed as appropriate. The video composition unit 861 includes a video RAM (not shown), and the monitor unit 862 and the like are driven based on video information and the like input to the video RAM. In addition, the video composition unit 861 performs scaling processing, EPG screen information superimposition processing, and the like as necessary based on the control of the main control unit 801. The voice synthesis unit 164 receives the voice information output from the MMT decoding processing unit 841 and the voice information output from the MPEG2-TS decoding processing unit 842, and 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 / receives data to / from each server device and other communication devices on the Internet 200. Also, an MMT data string (or part thereof) and an MPEG2-TS data string (or part thereof) of a program transmitted via a communication line are acquired, and an MMT decoding processing unit 841 and MPEG2-TS are appropriately selected. The data is output to the decoding processing unit 842.

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

  In general, when the video composition unit 861 mainly selects the video information output from the MMT decoding processing unit 841, the information on the current date and the current time acquired from the MH-TOT is displayed. When the video composition unit 861 mainly selects the video information and the like output from the MPEG2-TS decoding processing unit 842, the information related to the current date and the current time acquired from the TOT is superimposed on the video information and the like. What is necessary is just to control so that it may superimpose on image | video information etc.

  However, there is a difference in encoding processing / decoding processing, transmission path, etc. between a broadcasting service that employs MMT as a media transport method and a broadcasting service that employs MPEG2-TS as a media transport method. However, there is a possibility of inconsistency between the selection of a broadcast service that employs MMT as the media transport method and the selection of a broadcast service that employs MPEG2-TS as the media transport method. For example, as shown in FIG. 25, an EPG displaying channel information of a broadcast service adopting MPEG2-TS as a media transport method from an EPG screen 162g displaying channel information of a broadcast service adopting MMT as a media transport method. When the screen display is switched to the screen 162h, there is a possibility of causing the user to feel a visual discomfort due to inconsistency due to switching of the current time display from the current time display 162g1 to the current time display 162h1.

  In the broadcast receiving apparatus 800 according to the present embodiment, even when the video composition unit 861 mainly selects video information output from the MMT decoding processing unit 841 in order to prevent the user from having a visual discomfort. , Control is performed so that information relating to the current date and the current time acquired from the TOT is superimposed on the video information and the like. That is, control is performed so as to superimpose the current time information provided by the broadcast service adopting MPEG2-TS as the media transport method on the content of the broadcast service adopting MMT as the media transport method.

  By performing the control, the broadcast receiving apparatus 800 of the present embodiment always displays the current time information acquired by referring to the TOT when displaying the current time. Therefore, even when switching between a broadcast service that employs MMT as the media transport method and a broadcast service that employs MPEG2-TS as the media transport method, the user feels a visual discomfort due to inconsistent display of the current time. Can be prevented.

  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 the present embodiment. In the broadcast receiving apparatus 800 of the present embodiment, when the broadcast service adopting MPEG2-TS as a media transport system is in a state capable of being received, the current time information is always obtained by referring to the TOT. The MH-TOT can be used only when the broadcast service using MPEG2-TS as a media transport system cannot be received and the broadcast service using MMT as a media transport system can be received. To obtain the current time information.

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

  Note that, as described above, control is performed so that the current time information provided by the broadcast service adopting MPEG2-TS as the media transport method is superimposed on the content of the broadcast service adopting MMT as the media transport method. And any case of controlling to superimpose the current time information provided by the broadcast service adopting MMT as the media transport method on the content of the broadcast service adopting MPEG2-TS as the media transport method In the same manner as in the description of [Broadcast receiving apparatus time management] in the first embodiment, the current time information can be corrected by referring to the “delta” parameter of the time information in the TMCC extended information area. Is possible.

  Also, in any case of a broadcast service that employs MMT as a media transport system and a broadcast service that employs MPEG2-TS as a media transport system, the MH-TOT or TOT transmitted by each broadcast service constituting the network is There is a possibility that the transmission side system has an error due to a malfunction or a transmission error. In the broadcast receiving apparatus 800 of the present embodiment, as a countermeasure against the MH-TOT or TOT error, when it is determined that the MH-TOT or TOT acquired from the service being received has an error, Having a function to update the time information of the built-in clock by acquiring MH-TOT or TOT from any broadcast service of other networks or from any broadcast service of other networks and referring to the current time information And

  FIG. 26B shows an example of update processing of current time information when the broadcast receiving apparatus 800 of this embodiment receives a broadcast service that employs MPEG2-TS as the media transport method. Even when a broadcast service that employs MMT as the media transport method is being received, the same processing as that shown in FIG.

  When the time information of the built-in clock is updated in the broadcast receiving apparatus 800 of the present embodiment, first, MPEG2 of the broadcast service (broadcast service adopting MPEG2-TS as the media transport system) currently being received by the reception function execution unit 1102. -A TOT is acquired from the TS data string (S301), and the current time information is acquired by referring to the acquired TOT (S302). Next, the reception function execution unit 1102 performs a process of comparing the current time information acquired in the process of S302 with the time information of the built-in clock.

  As a result of the comparison process, when 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, if the difference between the current time information acquired in the process of S302 and the time information of the built-in clock is not within a predetermined value as a result of the comparison process (S303: No), or the TOT acquired in S301 is included in the data When it has 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 any other network MH-TOT is acquired from the MMT data string of the broadcast service (broadcast service adopting MMT as the media transport method) (S304), and further, 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.

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

  If the current time information in which the difference from the time information of the built-in clock is within the predetermined range cannot be acquired by repeating the processing of S304 to S305, such as at the time of initial setting after factory shipment, the processing is acquired in the processing of S302. The time information of the built-in clock may be set again with the current time information. In this way, it is possible to cope with a 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 receiver]
Event schedule information of a broadcast service adopting MMT as a media transport system is transmitted by MH-EIT or the like. On the other hand, event schedule information of a broadcast service that employs MPEG2-TS as a media transport system is transmitted by an EIT (Event Information Table) provided in SI defined in the MPEG-2 system. Therefore, in general, when displaying video information or the like provided by a broadcast service that employs MMT as a media transport method, event schedule information (MH-EIT) of the broadcast service that employs MMT is displayed. ) Can be obtained, and when displaying video information provided by a broadcast service adopting MPEG2-TS as a media transport method, event schedule information of the broadcast service employing MPEG2-TS is displayed. (EIT) can be acquired.

  However, the broadcast receiving apparatus 800 according to the present embodiment displays MPEG-2 TS as a media transport method even when displaying video information or the like provided by a broadcast service adopting MMT as a media transport method. Even when displaying video information and the like provided by a broadcasting service adopting the above, both the MH-EIT and the EIT can be acquired, improving the usability for the user.

  FIG. 27A shows an example of an EPG screen in the broadcast receiving apparatus 800 of the present embodiment. In the figure, an EPG screen 162i is an EPG screen created based on the MH-EIT of a broadcast service adopting MMT as a media transport method, and is “M1 TV”, “M2 broadcast”, “M3 channel”, “M4TV”. ”,“ TV M5 ”, and the like are broadcast station names of broadcast services that employ MMT as the media transport method. The EPG screen 162j is an EPG screen created based on the EIT of a broadcast service that employs MPEG2-TS as a media transport system. “T6 TV”, “T7 broadcast”, “T8 channel”, “T9TV” “TV TA” and the like are broadcast station names of broadcast services that employ MPEG2-TS as a media transport system.

  For example, when a user operates a remote controller (not shown) to instruct display of an EPG screen while viewing a broadcast program provided by a broadcast service that employs MMT as a media transport method, an initial screen of the EPG screen (shown) (Omitted) is displayed. The initial screen of the EPG screen is an EPG screen created based on the MH-EIT of a broadcasting service that employs MMT as a media transport method. Detailed information on the broadcast program of each channel “Nearby current time” is displayed. Next, the user desires to check the detailed information of the broadcast program of each channel “October 9th” of “October 9, 2014”, and operates the remote controller (not shown) to instruct to update the EPG screen. Then, the EPG screen 162i is displayed.

  Further, when the user desires to confirm detailed information of a broadcast program provided by a broadcast service adopting MPEG2-TS as a media transport method and operates a remote controller (not shown) to instruct switching of the network, EPG A screen 162j is displayed. At this time, in the broadcast receiving apparatus 800 of this embodiment, the initial screen of the EPG screen created based on the EIT of the broadcast service adopting MPEG2-TS as the media transport system (that is, “October 7, 2014” "17: 00-" of the broadcast program detailed information of each channel), and the same time zone as the EPG screen 162i displayed immediately before (that is, "October 9, 2014" ]) To display the detailed information of the broadcast program of each channel.

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

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

  Therefore, the user creates based on the EIT of the broadcast service adopting MPEG2-TS as the media transport method while the channel information created based on the MH-EIT of the broadcast service adopting MMT as the media transport method is confirmed. Even when it is desired to confirm the channel information, an instruction to switch the network by operating a remote controller (not shown) can be made unnecessary. Furthermore, the user can simultaneously confirm detailed information regarding broadcast programs in the same day and same time zone of a plurality of networks having different media transport methods. That is, the usability of the broadcast receiving apparatus 800 is improved.

Example 3
Hereinafter, Example 3 of the present invention will be described. Note that the configuration, processing, effects, and the like in this embodiment are the same as those in the first embodiment unless otherwise specified. For this reason, below, the difference between a present Example and Example 1 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible.

  The third embodiment of the present invention has a hardware configuration similar to that of the broadcast receiver 100 in the first embodiment, and performs control for realizing different copyright protection functions. In the present embodiment, the content protection control for video in the content will be described, and for audio, the same control as described below may be performed, or different content protection control may be performed. .

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

  Specifically, parameters included in the content copy control descriptor described in FIGS. 22A and 22B (for example, “digital_recording_control_data” parameter) and parameters included in the content use control descriptor described in FIG. 23 (for example, “encryption_mode_mode”). The content protection process based on the parameter) is controlled to be switched as shown in FIG. 28 according to the number of pixels of the content received by the broadcast receiving apparatus 100 or after the pixel number conversion when the pixel number conversion is performed. In the broadcast receiving apparatus 100 according to 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 the value of the “image_constraint_token” parameter. That is, the copyright protection concept of the broadcast receiving apparatus 100 according to the third embodiment is that the resolution of the video signal output is not limited to the user according to the “image_constraint_token” parameter, but according to the table of FIG. Appropriate content protection is performed according to the number of pixels before and after the accumulation process.

  In the table of FIG. 28, the accumulation that can be performed before the accumulation process is based on the accumulation process that is a process of recording the received content in the storage unit 110 of FIG. 8A so that it cannot be played back by an apparatus other than the broadcast receiver 100. The description is divided into pre-processing and post-storage processing performed after storage. First, the pre-storage process will be described. In the present embodiment, when the expression “before accumulation” of content is used, it is not always necessary that the content is subjected to accumulation processing thereafter. It includes both the meanings of “the previous state when content is actually stored” and “do not store content”.

[Content when receiving]
Since the broadcast receiver 100 according to the third embodiment receives the content of the MMT transmission method, all the transmission methods are the MMT transmission method in the example of FIG. Here, the content at the time of receiving the content is a content having a number of pixels exceeding 2K (number of pixels exceeding 1920 × 1080) such as 4K content (number of pixels 3840 × 2160) or 8K content (number of pixels 7680 × 4320). ) And 2K or less content (content having a pixel count of 1920 × 1080 or less).

  The broadcast receiver 100 may use data transmitted by the MMT method in order to determine whether the received content is more than 2K content or less than 2K content. Specifically, the pixel number information included in the header of the video encoded stream of content (for example, H.265 / HEVC encoded stream) may be used, and the video component descriptor of FIG. 19A described in the first embodiment may be used. The pixel number information stored in “video_resolution” included 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 according to the third embodiment includes a pixel number conversion unit (not shown) that converts the number of pixels of video before or after the video composition unit in FIG. Make it executable. As shown in the table of FIG. 28, when the pixel number conversion is not performed on the received content exceeding 2K (content having the number of pixels exceeding 1920 × 1080), the pixel number conversion is performed and another over 2K content is obtained. When converting to content, the number of pixels may be converted to a content of 2K or less (content of a pixel number of 1920 × 1080 or less). In addition, as shown in the table of FIG. 28, when the received 2K or less content (content having a pixel number of 1920 × 1080 or less) is not subjected to the pixel number conversion and the pixel number conversion is performed, another 2K or less content is performed. There are cases where the content is converted to (contents having a pixel count of 1920 × 1080 or less).

[Output processing to external device after content is received but not stored]
In the broadcast receiver 100 according to the third embodiment, when content before storage is output to an external device after content reception, the content protection processing is switched according to the state of the number of pixels of the content. Specifically, whether the number of pixels of the content when the content is output to an external device after receiving the content and before being stored is greater than 1920 × 1080 or less than 1920 × 1080 , The content protection process is changed. Here, changing the content protection processing includes a parameter (for example, “digital_recording_control_data” parameter) included in the content copy control descriptor described with reference to FIGS. 22A and 22B and a content usage control descriptor described with reference to FIG. Changing the interpretation of parameters (for example, “encryption_mode” parameter) and switching the content protection processing to be performed for 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. Just do it. As another example, the video output may be performed via an IP interface using the LAN communication unit 121 in FIG. 8A as hardware.

  (1-1) When receiving a content of more than 2K content (content having a pixel number exceeding 1920 × 1080) and outputting it to an external device without performing the pixel number conversion, or by performing a pixel number conversion When the content is converted to content exceeding 2K (content having a pixel count exceeding 1920 × 1080) and output to an external device

  In this case, the value of “encryption_mode” of the content usage control descriptor is not considered for content output protection. When “digital_recording_control_data” in the content copy control descriptor is 00, the content is not protected by HDCP and output. When “digital_recording_control_data” of the content copy control descriptor is 10, the content is output after applying advanced content protection after HDCP Revision 2.2. When “digital_recording_control_data” of the content copy control descriptor is 01, 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 after HDCP Revision 2.2. 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 HDCP content protection.

  The content protection process 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 at the time of output to the external device before storage is stored thereafter. This is referred to as “2K super content protection processing” at the time of output from the previous external device.

  (1-2) Upon reception, content of content exceeding 2K (content having a pixel number exceeding 1920 × 1080) is converted to 2K or less content (content having a pixel number of 1920 × 1080 or less) To output to an external device

  When “digital_recording_control_data” of the content copy control descriptor is 00 or when 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 to protect the content at the time of output. At this time, when the “encryption_mode” value of the content usage control descriptor is 1 and content protection is not designated, 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 designated, protection is performed by HDCP Revision 1 or Revision 2 or later and output.

  Further, when “digital_recording_control_data” of the content copy control descriptor is 10, protection is performed by HDCP Revision 1 or Revision 2 or later regardless of the “encryption_mode” value of the content usage control descriptor. 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, protection is performed by HDCP Revision 1 or Revision 2 or later regardless of the “encryption_mode” value of the content usage control descriptor. 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 HDCP content protection.

  The content protection process 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 at the time of output to the external device before storage is stored thereafter. This is referred to as “2K or less content protection processing” at the time of the previous external device output.

  (1-3) When receiving 2K or less content (contents having a pixel number of 1920 × 1080 or less) to an external device without converting the number of pixels at the time of reception, or by performing pixel number conversion and other 2K or less content (pixels) When converting to a content of 1920 × 1080 or less) and outputting to an external device

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

  As described above in (1-1), (1-2), and (1-3), at the time of output to the external device before accumulation, the number of content pixels when output to the external device before accumulation is set. In response, 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 content exceeding 2K with copy restrictions (pixels exceeding 1920 × 1080 pixels) If the content is output to an external device in a state of 2), the content protection is higher than that in the case of output to an external device in the state of 2K or less content with a copy restriction (content of 1920 × 1080 pixels or less). Output. This makes it possible to appropriately protect higher-value added 2K content (content having a pixel number exceeding 1920 × 1080 pixels) even in an external device.

[Content protection processing during content storage]
In the broadcast receiver 100 according to the third embodiment, in the output process to the external device after the content is received and before the storage, the content protection process is already switched according to the state of the number of pixels of the content. This is because the playback device that plays back content at the output destination is an external device, and the level of content protection processing may differ depending on the device.

  On the other hand, when the content is stored by the content storage function that can be reproduced only by the broadcast receiver 100 that receives and records the content, it is not necessary to change the process according to the state of the number of pixels of the content. is there. This is because the content is managed only by the broadcast receiver 100 in the first place, and there is no need to consider a plurality of correspondence levels of content protection processing. Therefore, in order to simplify the management in the broadcast receiver 100, when content is stored by a content storage function that can be reproduced only by the broadcast receiver 100 that has received and recorded the content, It is desirable to perform common storage protection processing for both contents exceeding 2K (contents having a pixel number exceeding 1920 × 1080) and contents not exceeding 2K (contents having a pixel number 1920 × 1080). The content accumulation process may be performed on, for example, the storage unit 110 (FIG. 8A) that is a recording medium built in the broadcast receiver 100 of the third embodiment. However, if a local encryption process unique to the broadcast receiver 100 is performed and management that can be reproduced only by the broadcast receiver 100 is performed, storage may be performed using an external recording medium such as a hard disk.

  In the content storage process shown in FIG. 28, content that has not undergone pixel number conversion for content that exceeds 2K content (content having a pixel count exceeding 1920 × 1080) at the time of reception, and content that exceeds 2K (pixels at the time of reception) Content converted to content exceeding 2K (content having a pixel number exceeding 1920 × 1080) by converting the number of pixels to the content) (content having a pixel number exceeding 1920 × 1080), Content that has been converted to 2K or less content (content that has a pixel count of 1920 × 1080 or less) by converting the number of pixels of the content that exceeds 2K content (content that has a pixel count exceeding 1920 × 1080) at the time of reception; 2K or less content (number of pixels 1920 x 1080 The content that has not undergone pixel number conversion for the lower content) and content that is 2K or less (content that has a pixel number of 1920 × 1080 or less) at the time of reception and other 2K or less content (pixel number 1920) The following common storage protection processing is performed in any case of content converted into (content of × 1080 or less).

  Here, the “common storage protection process” means that 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 are interpreted during storage. This means that the content exceeding 2K (content having a pixel count exceeding 1920 × 1080) and 2K or less content (content having a pixel count of 1920 × 1080 or less) are common.

  A specific example of the “common storage protection process” of the content storage process 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 “copying is possible without restriction conditions”, the content can be stored without restrictions on copying. The copy control information on the recording medium at the time of accumulation for managing the contents accumulated on the recording medium may be accumulated as “copying possible without restriction”. The copy control information on the recording medium used for copy control of the accumulated content may be generated and managed separately from the value of the “digital_recording_control_data” parameter included in the content copy control descriptor. It is not necessary to rewrite the value of the “digital_recording_control_data” parameter included in the child.

  In this case, in consideration of the value of the “encryption_mode” parameter included in the content usage control descriptor, when this value is 1 and content protection is specified, only the broadcast receiver 100 performs the accumulation process. In order to prevent reproduction, the broadcast receiver 100 is subjected to local encryption processing and stored. When 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 may not be performed (in this case, however, the local encryption process is not performed). May be applied). While accumulating content as `` Copyable without restrictions '', before changing external device output, external device copy, and external device move described later, content protection processing is not changed according to the number of pixels of the content, Perform common content protection processing. Thereby, 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 (see FIG. 23) included in the content usage control descriptor is 1, the content “only one generation can be copied” In the storage process, the copy control information on the recording medium at the time of storage for managing the content stored on the recording medium is stored as “recopy prohibited”. The copy control information on the recording medium used for copy control of the accumulated content may be generated and managed separately from the value of the “digital_recording_control_data” parameter included in the content copy control descriptor. It is not necessary to rewrite the value of the “digital_recording_control_data” parameter included in the child. In addition, when performing the accumulation process as “recopy prohibited”, the broadcast receiver 100 performs a local encryption process so as to be reproduced only by the broadcast receiver 100 and accumulates it. Copy processing is prohibited for content that has been stored as “recopy prohibited”. While accumulating the content as “Recopy prohibited”, before performing external device output and “Move external device” as “Recopy prohibited” described later, the content protection processing is not changed according to the number of pixels of the content, Perform common content protection processing. Thereby, 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 included in the content usage control descriptor is 0, the content is interpreted as “number limited copy allowed” content, and storage processing In this case, the copy control information on the recording medium at the time of storage for managing the content stored on the recording medium can be stored as “number limited copy allowed”. The copy control information on the recording medium used for copy control of the accumulated content may be generated and managed separately from the value of the “digital_recording_control_data” parameter included in the content copy control descriptor. It is not necessary to rewrite the value of the “digital_recording_control_data” parameter included in the child. In addition, when performing the accumulation process as “number limited copy permitted”, the broadcast receiver 100 performs a local encryption process so as to be reproduced only by the broadcast receiver 100 and accumulates it. Content is protected according to the number of pixels of the content while accumulating the content as “Number Restricted Copy Allowed” and before external device output, external device copy, and external device move as “Recopy prohibited” described later A common content protection process is performed without changing the process. Thereby, 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, when the broadcast receiver 100 supports the “temporary storage” function, temporary storage is possible, but when the broadcast receiver 100 does not support the “temporary storage” function. Is prohibited from accumulating and does not perform accumulation processing. When the broadcast receiver 100 is compatible with the “temporary accumulation” function, in the accumulation process, the copy control information on the recording medium at the time of accumulation for managing the contents accumulated on the recording medium is set as “temporary accumulation”. The content is accumulated and content can be accumulated for a certain time (for example, 1 hour 30 minutes). In this case, the storage time must be managed in units of one minute, and the stored content must be disabled before the above-described fixed time + 1 minute from the time of reception (= start of storage). As a specific example of disabling the reproduction of content, there is a method such as deleting the content itself or deleting the encryption key, so that the content cannot be reproduced. Copy processing and move processing are prohibited for content that is stored as “temporary storage”. While accumulating content as “Recopy prohibited”, before content output as “Recopy prohibited” described later is performed, content protection processing is not changed according to the number of pixels of content, and common content protection is performed. Process. Thereby, management within the broadcast receiver 100 can be simplified.

  As described above, at the time of content accumulation, 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 according to the number of content pixels at the time of accumulation. Interpretation is not switched and content protection processing is shared. Thereby, management within the broadcast receiver 100 can be simplified.

[Pixel number conversion after content storage]
The broadcast receiver 100 according to the third embodiment includes a pixel number conversion unit (not shown) that converts the number of pixels of video before or after the video composition unit in FIG. 8A, and stores the content after storage in the storage unit 110 in FIG. 8A. The video data is decoded by the video decoder 141 to convert the number of pixels of the video, and the number of pixels of the decoded video stored in the storage unit 110 is converted. Make it executable.

  As shown in the table of FIG. 28, the received 2K content (content having the number of pixels exceeding 1920 × 1080) is stored without converting the number of pixels and the 2K content (number of pixels 1920 × 1080) is stored. Content having a pixel count exceeding 2) or content exceeding 2K received (content having a pixel count exceeding 1920 × 1080) and converting the other 2K content (pixels exceeding 1920 × 1080 pixels) In some cases, the number of pixels exceeding 2K (content having a number of pixels exceeding 1920 × 1080) that has been converted and stored into a number of content) is not converted during output, move, or copy after storage. is there. In this case, the content to be output, moved, or copied is content exceeding 2K (content having the number of pixels exceeding 1920 × 1080).

  Also, the content exceeding 2K (content having the number of pixels exceeding 1920 × 1080) accumulated without performing the pixel number conversion on the received content exceeding 2K (content having the number of pixels exceeding 1920 × 1080) Alternatively, the received 2K content (content having a pixel number exceeding 1920 × 1080) is converted to other 2K content (content having a pixel number exceeding 1920 × 1080) by converting the number of pixels. When the content exceeding 2K (content having the number of pixels exceeding 1920 × 1080) is converted to other content exceeding 2K by performing pixel number conversion during output, move, or copy after storage There is also. In this case, the content to be output, moved, or copied is content exceeding 2K (content having the number of pixels exceeding 1920 × 1080).

  Also, the content exceeding 2K (content having the number of pixels exceeding 1920 × 1080) accumulated without performing the pixel number conversion on the received content exceeding 2K (content having the number of pixels exceeding 1920 × 1080) Alternatively, the received 2K content (content having a pixel number exceeding 1920 × 1080) is converted to other 2K content (content having a pixel number exceeding 1920 × 1080) by converting the number of pixels. The content exceeding 2K (content having the number of pixels exceeding 1920 × 1080) is converted to the number of pixels (pixel number 1920 × 1080) by converting the number of pixels at the time of output, moving, or copying after storage. The following content may be converted. In this case, the output, move, or copy target content is 2K or less content (content having a pixel number of 1920 × 1080 or less).

  In addition, the received 2K content (content having a pixel number exceeding 1920 × 1080) is converted into 2K or less content (content having a pixel number of 1920 × 1080 or less) by converting the number of pixels to 2K stored For the following contents (contents having a pixel number of 1920 × 1080 or less), the pixel number conversion may not be performed at the time of output after accumulation, move or copy. In this case, the output, move, or copy target content is 2K or less content (content having a pixel number of 1920 × 1080 or less).

  In addition, the received 2K content (content having a pixel number exceeding 1920 × 1080) is converted into 2K or less content (content having a pixel number of 1920 × 1080 or less) by converting the number of pixels to 2K stored For the following contents (contents with a pixel number of 1920 × 1080 or less), the number of pixels is converted at the time of output, move, or copy after storage, and converted to other 2K or less content (contents with a pixel number of 1920 × 1080 or less). In some cases. In this case, the output, move, or copy target content is 2K or less content (content having a pixel number of 1920 × 1080 or less).

  Also, 2K or less content (content having a pixel number of 1920 × 1080 or less) accumulated without performing pixel number conversion on the received 2K or less content (content of a pixel number of 1920 × 1080 or less) or 2K or less content ( Content with a pixel count of 1920 × 1080 or less) is converted to other 2K content (content with a pixel count of 1920 × 1080 or less) by converting the number of pixels to be stored (content with a pixel count of 1920 × 1080 or less) In some cases, the number of pixels is not converted during output, move, or copy after content. In this case, the output, move, or copy target content is 2K or less content (content having a pixel number of 1920 × 1080 or less).

  Also, 2K or less content (content having a pixel number of 1920 × 1080 or less) accumulated without performing pixel number conversion on the received 2K or less content (content of a pixel number of 1920 × 1080 or less) or 2K or less content ( Content with a pixel count of 1920 × 1080 or less) is converted to other 2K content (content with a pixel count of 1920 × 1080 or less) by converting the number of pixels to be stored (content with a pixel count of 1920 × 1080 or less) In some cases, the content is converted to other 2K or less content (content of 1920 × 1080 or less) by converting the number of pixels during output, movement, or copying after storage. In this case, the output, move, or copy target content is 2K or less content (content having a pixel number of 1920 × 1080 or less).

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

  Hereinafter, a specific example of output processing to an external device after content storage shown in FIG. 28 will be described. The output processing to the external device after the content is stored includes a video output unit which is a video obtained by decoding the video of the content stored in the storage unit 110 in FIG. 8A by the video decoder 141 or a video obtained by converting the decoded video by the pixel number conversion unit. What is necessary is just to apply to the video output process at the time of outputting to 163 from an external device. As another example, the video output may be performed via an IP interface using the LAN communication unit 121 in FIG. 8A as hardware.

  (2-1) The content exceeding 2K (the number of pixels exceeding 1920 × 1080) accumulated without performing the pixel number conversion on the received content exceeding 2K (content having the number of pixels exceeding 1920 × 1080) Content) or received 2K content (content having a pixel number exceeding 1920 × 1080) and converting the number of pixels to other 2K content (content having a pixel number exceeding 1920 × 1080) ) When converting to 2K content that has been converted and stored (content having a pixel count exceeding 1920 × 1080), the number of pixels is not converted when output to the external device after storage

  In this case, the content to be externally output is content exceeding 2K (content having a pixel number exceeding 1920 × 1080 pixels).

  Content that has been stored with the copy control information on the recording medium at the time of storage as “Copyable without restrictions” can be output without being protected by HDCP when played back and output externally after storage. . At this time, it is not considered whether protection is specified or not according to 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 “digital_recording_control_data” of the content copy control descriptor in the above (1-1) of the external output of the content before accumulation is 00.

  Content that has been stored as “Recopy prohibited” as copy control information on the recording medium at the time of storage, Content that has been stored as “Copy limit limited” as the copy control information on the recording medium at the time of storage, Content stored as copy storage information on the recording medium as “temporary storage” is output with high content protection after HDCP Revision 2.2 when it is reproduced and output externally after storage.

  Content that protects content as described above according to copy control information on a recording medium when the content after storage is output to an external device as content exceeding 2K (content having a pixel count exceeding 1920 × 1080) The protection process is hereinafter referred to as “over 2K content protection process” when the external device is output after storage.

  (2-2) Over 2K content (the number of pixels exceeding 1920 × 1080) accumulated without performing pixel number conversion on the received 2K super content (content having a pixel number exceeding 1920 × 1080) Content) or received 2K content (content having a pixel number exceeding 1920 × 1080) and converting the number of pixels to other 2K content (content having a pixel number exceeding 1920 × 1080) ) When converting 2K content that has been converted and stored (content having a pixel count exceeding 1920 × 1080) into an external device after storage and converting it to other 2K content

  In this case, the content to be externally output is content exceeding 2K (content having a pixel count exceeding 1920 × 1080), which is the same as in the case of (2-1) above. The “exceeding 2K content protection processing” at the time of output of the external device described after accumulation is performed.

  (2-3) Over 2K content (the number of pixels exceeding 1920 × 1080) accumulated without performing pixel number conversion on the received 2K super content (content having a pixel number exceeding 1920 × 1080). Content) or received 2K content (content having a pixel number exceeding 1920 × 1080) and converting the number of pixels to other 2K content (content having a pixel number exceeding 1920 × 1080) 2K content (content having a number of pixels exceeding 1920 × 1080) converted to a 2K content (number of pixels 1920 × 1080) by converting the number of pixels at the time of output to the external device after storage. When converting to the following content)

  In this case, the target content to be externally output is 2K or less content (content having a pixel number of 1920 × 1080 or less).

  In this case, the content stored as copy control information on the recording medium at the time of storage as “Copyable without constraint” is protected by the value of the “encryption_mode” parameter included in the content usage control descriptor at the time of storage. The content protection processing is switched in consideration of whether or not was specified. Specifically, when the value of “encryption_mode” is 1 and the protection of content is not designated, the content can be output without being protected by HDCP when being reproduced and output externally after storage. When the value of “encryption_mode” is 0 and protection of content is designated, protection is performed by HDCP Revision 1 or Revision 2 or later when playing back after storage and outputting to an external device. This makes it possible to share the processing with the case where “digital_recording_control_data” of the content copy control descriptor in the above (1-2) of the external output of the content before accumulation is 00.

  In addition, content that has been stored as “recopy prohibited” copy control information on the recording medium at the time of storage, content that has been stored as “copy limit limited” on the copy control information on the recording medium at the time of storage, storage Content that has been stored as “temporary storage” with copy control information on the recording medium at the time is output after being protected by HDCP Revision 1 or Revision 2 or later.

  When the content after storage is output to an external device as content of 2K or less (content of 1920 × 1080 pixels or less), content protection processing that performs content protection as described above according to the copy control information on the recording medium, Hereinafter, this is referred to as “2K or less content protection processing” when the external device is output after storage.

  (2-4) The received 2K content (content having a pixel number exceeding 1920 × 1080) is converted into 2K or less content (content having a pixel number of 1920 × 1080) by converting the number of pixels. When the number of pixels stored is 2K or less (contents with a pixel count of 1920 x 1080 or less) and the number of pixels is not converted when the external device is output

  In this case, the content to be externally output is 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (2-3) above, and therefore, after the accumulation described in (2-3) “2K or less content protection processing” is performed when the external device is output.

  (2-5) The received 2K content (content having a pixel number exceeding 1920 × 1080) is converted to a 2K or less content (content having a pixel number of 1920 × 1080) by converting the number of pixels. The stored 2K or less content (contents with a pixel count of 1920 × 1080 or less) is converted to other 2K or less content (contents with a pixel count of 1920 × 1080 or less) by converting the number of pixels when the external device is output after storage. Case

  In this case, the content to be externally output is 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (2-3) above, and therefore, after the accumulation described in (2-3) “2K or less content protection processing” is performed when the external device is output.

  (2-6) 2K or less content (content having a pixel number of 1920 × 1080 or less) accumulated without performing pixel number conversion on the received 2K or less content (content of a pixel number of 1920 × 1080 or less) or 2K received Below 2K content (number of pixels 1920 ×) which is converted and accumulated to other 2K or less content (content of pixel number 1920 × 1080 or less) by converting the number of pixels to the content (content of pixel number 1920 × 1080 or less) When the number of pixels is not converted when outputting to external devices after storage

  In this case, the content to be externally output is 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (2-3) above, and therefore, after the accumulation described in (2-3) “2K or less content protection processing” is performed when the external device is output.

  (2-7) 2K or less content (content having a pixel number of 1920 × 1080 or less) accumulated without performing pixel number conversion on the received 2K or less content (content of a pixel number of 1920 × 1080 or less) or 2K received Below 2K content (number of pixels 1920 ×) which is converted and accumulated to other 2K or less content (content of pixel number 1920 × 1080 or less) by converting the number of pixels to the content (content of pixel number 1920 × 1080 or less) When converting to other 2K content or less (contents of 1920 × 1080 pixels or less) by converting the number of pixels of the content (1080 or less content) to an external device after storage

  In this case, the content to be externally output is 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (2-3) above, and therefore, after the accumulation described in (2-3) “2K or less content protection processing” is performed when the external device is output.

  As described above in (2-1) to (2-7), at the time of output to the external device after storage, the content protection processing is switched according to the number of content pixels when output to the external device after storage. . When output to an external device in the state of copy-limited content exceeding 2K (content having a pixel count exceeding 1920 × 1080), copy-restricted content of 2K or less (content having a pixel count of 1920 × 1080 or less) When output to an external device in the state of, output with more advanced content protection. This makes it possible to appropriately protect higher-value added 2K content (content having a pixel number exceeding 1920 × 1080 pixels) even in an external device.

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

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

  (3-1) A content exceeding 2K (a pixel number exceeding 1920 × 1080) accumulated without performing pixel number conversion on the received content exceeding 2K (content having a pixel number exceeding 1920 × 1080). Content) or received 2K content (content having a pixel number exceeding 1920 × 1080) and converting the number of pixels to other 2K content (content having a pixel number exceeding 1920 × 1080) ) When converting to 2K content that has been converted to and stored (contents with a pixel count exceeding 1920 × 1080), the number of pixels is not converted when moving to the external device after storage

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

  Content that has been stored with the copy control information on the recording medium at the time of storage as “Copyable without constraint” can be moved without being protected by DTCP when moved to an external device after storage. At this time, it is not considered whether protection is specified or not according to the value of the “encryption_mode” parameter included in the content usage control descriptor at the time of storage.

  For contents that have been stored as “recopy prohibited” copy control information on the recording medium at the time of storage, and for contents that have been stored as “number limited copy allowed” as the copy control information on the recording medium at the time of storage, DTCP -Content protection can be performed by DTCP2 (described in Reference 1), which is a more advanced content protection system than IP, and can be moved to an external device. Note that even if the external device supports content protection by DTCP-IP, it cannot play back content protected by DTCP2 unless it supports content protection by DPCT2 (transmit content protected by DTCP2). I can't get it.) Therefore, although content protection is stronger in DPCT2, existing external devices cannot support content protected by DTCP2. On the other hand, content protection by DTCP-IP cannot operate a new content protection flag of DPCT2, but can move a target for an existing DTCP-IP compatible external device not compatible with DPCT2.

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

  Content that protects content as described above according to copy control information on a recording medium when moving the accumulated content to an external device as content exceeding 2K (content having a pixel count exceeding 1920 × 1080) The protection process is hereinafter referred to as “2K super content protection process” when moving to an external device after storage.

  (3-2) The content exceeding 2K (the number of pixels exceeding 1920 × 1080) accumulated without performing the pixel number conversion on the received content exceeding 2K (content having the number of pixels exceeding 1920 × 1080) Content) or received 2K content (content having a pixel number exceeding 1920 × 1080) and converting the number of pixels to other 2K content (content having a pixel number exceeding 1920 × 1080) ) Converted to 2K content (contents with a pixel count exceeding 1920 × 1080) and converted to other 2K content by converting the number of pixels when moving to an external device after storage. When to

  In this case, the content to be moved to the external device is a content exceeding 2K (content having a pixel number exceeding 1920 × 1080 pixels), which is the same as in the case of (3-1) above. The “2K super content protection process” is performed when moving to the external device after accumulation described in (1).

  (3-3) Over 2K content (the number of pixels exceeding 1920 × 1080) accumulated without performing pixel number conversion on the received 2K super content (content having a pixel number exceeding 1920 × 1080) Content) or received 2K content (content having a pixel number exceeding 1920 × 1080) and converting the number of pixels to other 2K content (content having a pixel number exceeding 1920 × 1080) 2K content (contents having a pixel number exceeding 1920 × 1080) converted and stored in an external device after the storage is converted to 2K or less content (pixel number 1920) When converting to content of × 1080 or less)

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

  In this case, the content stored as copy control information on the recording medium at the time of storage as “Copyable without constraint” is protected by the value of the “encryption_mode” parameter included in the content usage control descriptor at the time of storage. The content protection processing is switched in consideration of whether or not was specified. Specifically, when the value of “encryption_mode” is 1 and the protection of content is not designated, the content can be moved without being protected by DTCP when moving to an external device after storage. If the value of “encryption_mode” is 0 and protection of content is specified, protection by DTCP (or DTCP-IP when moving via the IP interface) is performed when moving to an external device after storage. Can move. At this time, content protection by DTCP2 is not necessary.

  For content that has been stored as “Recopy prohibited” as the copy control information on the recording medium at the time of storage, and content that has been stored as “No copy limit allowed” as the copy control information on the recording medium at the time of storage , DTCP (DTCP-IP when moving through the IP interface) is used for protection. At this time, content protection by DTCP2 is not necessary.

  When the content after storage is moved to an external device as content of 2K or less (content of pixels of 1920 × 1080 or less), content protection processing that performs content protection as described above according to the copy control information on the recording medium, Hereinafter, this is referred to as “2K or less content protection processing” when moving to an external device after storage.

  (3-4) Pixel number conversion is performed on the received content exceeding 2K (content having a pixel number exceeding 1920 × 1080) to convert it to 2K or less content (content having a pixel number of 1920 × 1080 or less). When the number of pixels that have been stored is less than 2K (content that has the number of pixels of 1920 x 1080 or less) and the number of pixels is not converted when moving to the external device after storage

  In this case, the content to be moved to the external device is 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (3-3), and is described in (3-3). Perform “2K or less content protection processing” when moving to an external device after storage.

  (3-5) Convert the received content exceeding 2K (content having a pixel number exceeding 1920 × 1080) into 2K or less content (content having a pixel count of 1920 × 1080) The stored 2K or less content (contents with a pixel number of 1920 × 1080 or less) is converted to other 2K or less content (contents with a pixel number of 1920 × 1080 or less) by converting the number of pixels when moving to an external device after storage. When converting

  In this case, the content to be moved to the external device is 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (3-3), and is described in (3-3). Perform “2K or less content protection processing” when moving to an external device after storage.

  (3-6) 2K or less content (content of pixel number 1920 × 1080 or less) stored without performing pixel number conversion on the received 2K or less content (content of pixel number 1920 × 1080 or less) or 2K received Below 2K content (number of pixels 1920 ×) which is converted and accumulated to other 2K or less content (content of pixel number 1920 × 1080 or less) by converting the number of pixels to the content (content of pixel number 1920 × 1080 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 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (3-3), and is described in (3-3). Perform “2K or less content protection processing” when moving to an external device after storage.

  (3-7) 2K or less content (content having a pixel number of 1920 × 1080 or less) accumulated without performing pixel number conversion on the received 2K or less content (content of a pixel number of 1920 × 1080 or less) or 2K received Below 2K content (number of pixels 1920 ×) which is converted and accumulated to other 2K or less content (content of pixel number 1920 × 1080 or less) by converting the number of pixels to the content (content of pixel number 1920 × 1080 or less) When converting to a 2K or less content (contents of 1920 × 1080 or less) by converting the number of pixels to an external device after storage (content of 1080 or less)

  In this case, the content to be moved to the external device is 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (3-3), and is described in (3-3). Perform “2K or less content protection processing” when moving to an external device after storage.

  As described above in (3-1) to (3-7), when moving to an external device after storage, content protection processing is performed according to the number of pixels of the content when moving to the external device after storage. Switch. When moving to an external device in the state of copy-limited content exceeding 2K (content having a pixel count exceeding 1920 × 1080), copy-restricted content of 2K or less (content having a pixel count of 1920 × 1080 or less) When moving to an external device in the state of, move with advanced content protection. This makes it possible to appropriately protect higher-value added 2K content (content having a pixel number exceeding 1920 × 1080 pixels) even in an external device.

  In any case of the above (3-1) to (3-7), the movement of the content to the external device copies the content to only one authenticated external device, It includes a series of processes for making the original content unplayable. At this time, it is necessary to disable the reproduction of the original content within one minute after the content is copied to the external device. As a specific example of disabling the reproduction of content, there is a method such as deleting the content itself or deleting the encryption key, so that the content cannot be reproduced.

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

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

  In addition, copying to external devices is prohibited for content that is stored with the copy control information on the recording medium at the time of storage as “recopy prohibited”. With respect to content that is stored with the copy control information on the recording medium at the time of storage as “Number Limited Copy Allowed”, up to 9 copies can be generated in addition to the original content. However, for example, in the case where the storage unit 110 in FIG. 8A for accumulating contents is configured with a RAID system that performs backup processing that cannot be directly accessed by the user, the above-described 9 copies for backup purposes that cannot be directly accessed by the user are described. It may be excluded from the number limit. When copying within the above 9 copy limit number to an external device via the IP interface, it is necessary to copy to a single authenticated external device in a state where the number of one is managed. There is. The original content after generation of the number-limited (9) copies can be moved to an external device by the above-described move processing. The nine copy processes and one original content move process generate nine copies in the broadcast receiver 100 at the time of content accumulation, and each of the ten contents including the original contents one by one This is equivalent to performing a move process.

  Hereinafter, a specific process for making the content protection process different in accordance with the number of pixels of the content when copying the accumulated content to an external device will be described.

  (4-1) The content exceeding 2K (the number of pixels exceeding 1920 × 1080) accumulated without performing the pixel number conversion on the received content exceeding 2K (content having the number of pixels exceeding 1920 × 1080). Content) or received 2K content (content having a pixel number exceeding 1920 × 1080) and converting the number of pixels to other 2K content (content having a pixel number exceeding 1920 × 1080) ) When converting to 2K content that has been converted and stored (contents with a pixel count exceeding 1920 × 1080) and not being converted when copying 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 pixel number exceeding 1920 × 1080 pixels).

  Content stored as “Copyable without constraint” in the copy control information on the recording medium at the time of storage can be copied without being protected by DTCP when copying to an external device after storage. At this time, it is not considered whether protection is specified or not according to the value of the “encryption_mode” parameter included in the content usage control descriptor at the time of storage.

  Copying to the external device is prohibited for the content that is stored as “recopy prohibited” in the copy control information on the recording medium at the time of storage. When copying content that has been stored with the copy control information on the recording medium at the time of storage as “Number Limited Copy Allowed” to an external device within the above nine limited numbers, it is more sophisticated than DTCP-IP. Content protection can be performed by the above-described DTCP2 which is a content protection system, and can be copied to an external device (in this case, by sending each copy target content to the external device using the DTCP2 move process, Copying in which the number of contents is managed may be realized, in which case the moving process is performed on one piece of content within the limit of nine, so that the number of contents to be copied is reduced, which is equivalent to disabling playback. Although it is handled, it is not necessary to disable the reproduction of the original content itself outside the limit of nine.) Note that even if the external device supports content protection by DTCP-IP, it cannot play back content protected by DTCP2 unless it supports content protection by DPCT2 (transmit content protected by DTCP2). I can't get it.) Therefore, although content protection is stronger in DPCT2, existing external devices cannot support content protected by DTCP2. On the other hand, content protection by DTCP-IP cannot operate a new content protection flag of DPCT2, but can copy an existing external device compatible with DTCP-IP that does not support DPCT2.

  Content that protects content as described above according to copy control information on a recording medium when copying the stored content to an external device as content exceeding 2K (content having a pixel number exceeding 1920 × 1080) The protection process is hereinafter referred to as “2K super content protection process” when copying to an external device after storage.

  (4-2) The content exceeding 2K (the number of pixels exceeding 1920 × 1080) accumulated without performing the pixel number conversion on the received content exceeding 2K (content having the number of pixels exceeding 1920 × 1080). Content) or received 2K content (content having a pixel number exceeding 1920 × 1080) and converting the number of pixels to other 2K content (content having a pixel number exceeding 1920 × 1080) 2K content (contents with more than 1920 x 1080 pixels) converted and stored, and converted to other 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 a content exceeding 2K (content having a pixel number exceeding 1920 × 1080 pixels), which is the same as the case of (4-1) above, and (4-1 The “2K super-content protection process” is performed at the time of copying to the external device after accumulation described in (1).

  (4-3) The content exceeding 2K (the number of pixels exceeding 1920 × 1080) accumulated without performing the pixel number conversion on the received content exceeding 2K (content having the number of pixels exceeding 1920 × 1080) Content) or received 2K content (content having a pixel number exceeding 1920 × 1080) and converting the number of pixels to other 2K content (content having a pixel number exceeding 1920 × 1080) 2K content (content having a pixel number exceeding 1920 × 1080) converted and stored, and the content is converted to 2K or less (pixel number 1920) by performing pixel number conversion when copying to the external device after storage. When converting to content of × 1080

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

  In this case, the content stored as copy control information on the recording medium at the time of storage as “Copyable without constraint” is protected by the value of the “encryption_mode” parameter included in the content usage control descriptor at the time of storage. The content protection processing is switched in consideration of whether or not was specified. Specifically, when the value of “encryption_mode” is 1 and the protection of content is not designated, the content can be copied without being protected by DTCP when copying to an external device after accumulation. When the value of “encryption_mode” is 0 and the protection of content is designated, protection by DTCP (DTCP-IP when copying via the IP interface) is performed when copying to an external device after accumulation. Can be copied. At this time, content protection by DTCP2 is not necessary.

  Copying to the external device is prohibited for the content that is stored as “recopy prohibited” in the copy control information on the recording medium at the time of storage. When copying content that has been stored with the copy control information on the recording medium at the time of storage as “Number Limited Copy Allowed” to an external device within the above nine limited numbers, DTCP (via the IP interface) In the case of copying, the data is protected by DTCP-IP). At this time, content protection by DTCP2 is not necessary. At this time, in order to realize copying in which the number of contents is managed, a DTCP move function may be used for copying contents one by one. In this case, since the move process is performed for one content within the limit number of nine, the number of contents to be copied is reduced, which is equivalent to disabling playback, but an element outside the limit number of nine It is not necessary to disable the reproduction of the content itself.

  When the content after storage is copied to an external device as content of 2K or less (content of 1920 × 1080 pixels or less), content protection processing for content protection as described above according to copy control information on the recording medium is performed. Hereinafter, this is referred to as “2K or less content protection processing” at the time of copying to an external device after storage.

  (4-4) Pixel number conversion is performed on the received content exceeding 2K (content having a pixel number exceeding 1920 × 1080) to convert it to 2K or less content (content having a pixel number of 1920 × 1080 or less). When the number of pixels stored is 2K or less (contents with a pixel number of 1920 x 1080 or less) and 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 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (4-3) above, and is described in (4-3). Perform “2K or less content protection processing” when copying to an external device after storage.

  (4-5) Convert the received content exceeding 2K (content having a pixel number exceeding 1920 × 1080) into 2K or less content (content having a pixel count of 1920 × 1080) The stored 2K or less content (contents with a pixel number of 1920 × 1080 or less) is converted to other 2K or less content (contents with a pixel number of 1920 × 1080 or less) by converting the number of pixels when copying to an external device after storage. When converting

  In this case, the content to be copied to the external device is 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (4-3) above, and is described in (4-3). Perform “2K or less content protection processing” when copying to an external device after storage.

  (4-6) 2K or less content (content of pixel number 1920 × 1080 or less) that has been stored without performing pixel number conversion on the received 2K or less content (content of pixel number 1920 × 1080 or less) or 2K received Below 2K content (number of pixels 1920 ×) which is converted and accumulated to other 2K or less content (content of pixel number 1920 × 1080 or less) by converting the number of pixels to the content (content of pixel number 1920 × 1080 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 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (4-3) above, and is described in (4-3). Perform “2K or less content protection processing” when copying to an external device after storage.

  (4-7) 2K or less content (content having a pixel number of 1920 × 1080 or less) stored without performing pixel number conversion on the received 2K or less content (content of a pixel number of 1920 × 1080 or less) or 2K received Below 2K content (number of pixels 1920 ×) which is converted and accumulated to other 2K or less content (content of pixel number 1920 × 1080 or less) by converting the number of pixels to the content (content of pixel number 1920 × 1080 or less) When the number of pixels is converted at the time of copying to an external device after storage to other 2K or less contents (contents having a number of pixels of 1920 × 1080 or less)

  In this case, the content to be copied to the external device is 2K or less content (content having a pixel number of 1920 × 1080 or less), which is the same as in the case of (4-3) above, and is described in (4-3). Perform “2K or less content protection processing” when copying to an external device after storage.

  As described above in (4-1) to (4-7), 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 copying to an external device in the state of copy-limited content exceeding 2K (content having a pixel count exceeding 1920 × 1080), copy-restricted content of 2K or less (content having a pixel count of 1920 × 1080 or less) When copying to an external device in this state, copy with more advanced content protection. This makes it possible to appropriately protect higher-value added 2K content (content having a pixel number exceeding 1920 × 1080 pixels) even in an external device.

  Note that the case where the content stored as “number limited copy allowed” is copied to an external device within the above-mentioned nine limited numbers has been described in (4-1) to (4-7) above. Regardless of whether you use “2K content protection processing” when copying to an external device after storage, or “2K or less content protection processing” when copying to an external device after storage, the remaining number of copies is equal It is assumed that the number is reduced by one, and it is not necessary to provide a difference in the number of copies that can be copied based on the difference in the content protection processing at the time of copying.

  In any of the external output processing, external move processing, and external copy processing described above, output, move, or copy should be prohibited for external devices that do not support the content protection function described in the respective conditions. What is necessary is just to comprise.

  It should be noted that “digital_recording_control_data” information and “encryption_mode” information, which protects the same received content, are transmitted via a broadcast transmission path with a plurality of different tables and descriptors, or communicate with the broadcast transmission path. If the same or different tables or descriptors are transmitted via both lines, the highest priority is determined using a predetermined priority judgment process based on the type of table or descriptor and the type of transmission path. Information having a high value may be used for the content protection processing described in this embodiment.

  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, and the external device after storage. DTCP, DTCP-IP, and DTCP2, which are used for processing such as moving to, copying, etc., are content protection methods for protecting content such as encoded video, and the aspects of the content to be protected are different. In spite of this, the threshold when the content protection processing is switched according to the number of content pixels in the broadcast receiver 100 according to the third embodiment is more than 2K content (the number of pixels exceeding 1920 × 1080 pixels). Content) and 2K or less content (content having a pixel number of 1920 × 1080 or less). In this way, even in content protection methods with different aspects of the content to be protected, by setting the same switching threshold when switching content protection processing according to the number of pixels, the types of conditional branches for switching content protection processing do not increase as much as possible. It is possible to simplify the processing, and it is effective.

  According to the third embodiment of the present invention described above, not only the output process to the external device before the content is accumulated, but also the output process to the external device after the content is accumulated, the move process 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 the content. As a result, high-value content with higher added value can be appropriately protected even in the external device. In addition, during content accumulation, processing can be simplified by performing common content protection regardless of the number of pixels of the content. That is, in the case of output processing, move processing, or copy processing for external devices with various content protection levels, the content protection processing is switched according to the number of pixels of the content, and content storage itself that can be played back only by the own device is content. The processing can be simplified by performing common content protection regardless of the number of pixels.

(Example 4)
Hereinafter, Example 4 of the present invention will be described. The fourth embodiment of the present invention has the same hardware configuration as that of the broadcast receiver 800 in the second embodiment, and the configuration, processing, effects, and the like in this embodiment are the same as those in the second embodiment except for content protection processing. To do. For this reason, below, the difference between a present Example and Example 2 is mainly demonstrated, and in order to avoid duplication about a common point, description is abbreviate | omitted as much as possible.

  The fourth embodiment of the present invention has a hardware configuration similar to that of the broadcast receiver 800 in the second embodiment, and performs control for realizing different copyright protection functions. In the present embodiment, the content protection control for video in the content will be described, and for audio, the same control as described below may be performed, or different content protection control may be performed. .

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

  In FIG. 29, the content protection processing whose transmission method is shown in the row of MMT is content protection processing applied to content to be received by the MMT decoding processing unit 841 of the broadcast receiver 800 in FIG. Since this is the same as the content protection process of FIG. 28 described in Example 3, the description thereof is omitted.

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

  It is assumed that any content received by the broadcast receiver 800 according to the fourth embodiment of the present invention by the MPEG2-TS transmission method is 2K or less content (content having a pixel number of 1920 × 1080 or less).

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

  Here, the format of the table for transmitting control information used for content protection differs between the MMT transmission system and the MPEG2-TS transmission system. Specifically, in the MMT transmission method, the content copy control descriptor and the content usage control descriptor are mainly transmitted by, for example, MPT (others are MH-EIT and MH-SDT). On the other hand, in the MPEG2-TS transmission system, corresponding copy control related information, such as a digital copy control descriptor and a content use descriptor, are mainly transmitted by, for example, a PMT (program map table) (in addition, EIT, SDT). Is done. Therefore, the format of the table and descriptor to which the copy control related information is transmitted is 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 that specifies content protection and the “copy_restriction_mode” parameter are made common in the MMT transmission method and the MPEG2-TS transmission method.

  As a result, in the case of 2K or less content (content having a pixel number of 1920 × 1080 or less) received by the MPEG2-TS transmission method and in the case of 2K or less content (content having a pixel number of 1920 × 1080 or less) received by the MMT transmission method So, common external output processing before content storage, content storage processing, external output processing after content storage, move processing to external devices after content storage, and copy processing to external devices after content storage Can simplify the process. Each specific process performs a content protection process for 2K or less content (content having a pixel number of 1920 × 1080 or less) received by the MMT transmission method described in the third embodiment. Since the contents have been described in the third embodiment, the description thereof is omitted.

  Furthermore, by sharing this processing, the content protection processing in the case of 2K or less content (contents having a pixel number of 1920 × 1080 or less) received by the MPEG2-TS transmission method is performed for 2K or less content (number of pixels) received by the MMT transmission method. In addition to content protection processing in the case of (content of 1920 × 1080 or less), content exceeding 2K (content having a pixel number exceeding 1920 × 1080) received by the MMT transmission method is stored before or after content storage. Since the pixel number conversion process can share the process with the content protection process in the case of content of 2K or less (content of the number of pixels 1920 × 1080 or less), the effect of simplifying the process is very high.

  According to the fourth embodiment of the present invention described above, the same effect as that of the third embodiment can be obtained for the content received by the MMT transmission method. In addition, for content of a predetermined number of pixels or less, content received by the MMT transmission method and content received by MPEG2-TS are not only output processing to an external device before content storage but also content after content storage Content protection processing can be shared in both cases of output processing to external devices, move processing to external devices, and copy processing to external devices, simplifying processing beyond the transmission method It becomes possible.

  As mentioned above, although the example of embodiment of this invention was demonstrated using Examples 1-4, the structure which implement | achieves the technique of this invention is not restricted to the said Example, Various modifications can be considered. For example, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. These all belong to the category of the present invention. In addition, numerical values, messages, and the like appearing in sentences and drawings are merely examples, and the use of different ones does not impair the effects of the present invention.

  The functions and the like of the present invention described above may be realized by hardware by designing some or all of them, for example, by an integrated circuit. Further, the microprocessor unit or the like may be realized by software by interpreting and executing an operation program that realizes each function or the like. Hardware and software may be used together.

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

  In addition, the control lines and information lines shown in the figure are those that are considered necessary for the explanation, and do not necessarily indicate all the control lines and information lines on the product. Actually, it may be considered that almost all the components are connected to each other.

  DESCRIPTION OF SYMBOLS 100,800 ... Broadcast receiving apparatus, 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 unit, 124, 824 ... extended interface unit, 125, 825 ... digital interface unit, 131, 831, 832 ... tuner / demodulation unit, 132 ... separation unit, 141 ... video decoder, 142 ... video color gamut conversion unit, 143 ... Audio decoder, 144 ... Character 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, 61, 861 ... Video synthesis unit, 162, 862 ... Monitor unit, 163, 863 ... Video output unit, 164, 864 ... Audio synthesis unit, 165, 865 ... Speaker unit, 166, 866 ... Audio output unit, 170, 870 ... Operation input unit, 841... MMT decoding processing unit, 842... MPEG2-TS decoding processing unit, 200... Internet, 200r... Router device, 200a... Access point, 300t ... radio tower, 300s ... broadcasting satellite (or communication satellite), 300 ... broadcast station server, 400 ... service provider server, 500 ... other application server, 600 ... mobile telephone communication server, 600b ... base station, 700 ... portable information terminal.

Claims (2)

A first broadcast receiving unit capable of receiving digital broadcast content transmitted by the first transmission method and control information related to content protection of the content;
A second broadcast receiving unit capable of receiving digital broadcast content transmitted in a second transmission method different from the first transmission method and control information relating to content protection of the content;
An accumulator that accumulates content received by the first broadcast receiver or the second broadcast receiver;
A video output unit for outputting video of content received in the first broadcast receiving unit or the second broadcast receiving unit or content stored in the storage unit to an external device;
A control unit,
In the control state of the storage unit and the video output unit by the control unit,
A first video output processing state for outputting from the video output unit to an external device without storing content in the storage unit;
Content storage processing state for storing content in the storage unit;
There is a second video output processing state in which content is output from the video output unit to an external device after content storage processing in the storage unit,
The control unit can control content protection processing based on the control information related to the content protection, and the content received by the first broadcast receiving unit is the content video in the first video output processing state. The content protection processing is switched according to the number of pixels of the content, and the content protection processing is switched according to the number of pixels of the content video even in the second video output processing state, and the first video output processing state and the The threshold number of pixels for switching the content protection processing is the same in the second video output processing state, and the content protection processing of the number of pixels equal to or less than the threshold number of pixels among the content received by the first broadcast receiving unit In the first video output processing state and the second video output processing state for the content received by the second broadcast receiving unit Content is the same as the protection processing of,
Broadcast receiving device. A first receiving step capable of receiving a digital broadcast transmitted by the first transmission method;
A second receiving step capable of receiving a digital broadcast transmitted by a second transmission method different from the first transmission method;
An accumulation step for accumulating the content received in the first reception step;
A first video output step of outputting the content received in the first reception step to an external device without storing in the storage step;
A second video output step of outputting the video of the content stored in the storage step to an external device,
With respect to the broadcast content received in the first reception step, the content protection processing can be controlled based on the control information regarding the content protection received in the first reception step, and the broadcast content received in the first reception step. For the content video, in the output processing in the first video output step, the content protection processing is switched according to the number of pixels of the content video to be output, and the broadcast content received in the first reception step In the output processing in the second video output step, the content protection processing is switched according to the number of pixels of the content video,
A threshold value for switching the content protection process between the output process in the first video output step and the output process in the second video output step for the broadcast content received in the first reception step. The number of pixels is equal,
Content protection processing in the output processing in the first video output step and the second video output step for the content having the number of pixels equal to or less than the threshold number of pixels among the content received in the first reception step The content protection processing in the output processing in the above is common to the content protection processing in the corresponding video output processing for the content received in the second reception step, respectively.
Content protection processing method.

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