JP6734742B2 - How to protect your content - Google Patents

Description

The present invention relates to a content protection method .

One of the extended functions of the digital broadcasting service is data broadcasting in which digital data is transmitted by broadcasting waves and various kinds of information such as weather forecasts, news and recommended programs are displayed. A large number of television receivers capable of receiving data broadcasting have already been put on the market, and a large number of technologies related to data broadcasting reception have been published, including Patent Document 1 below.

JP 2001-186486 A

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

An object of the present invention is to provide a broadcast receiving device 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.

To give an example, a broadcast receiving apparatus for receiving content, a receiving unit for receiving the content, an interface for outputting the content received by the receiving unit, and an output state of the content from the interface A control unit for controlling the control unit, wherein the control unit receives control information indicating the copy control status of the content, which is received by the receiving unit together with the content, and control for designating necessity of protection at the time of outputting the content. A broadcast receiving device is used, which determines an output state of content from the interface according to a combination of information, information indicating a resolution of a video of the content, and information indicating a transfer characteristic of a video of the content.

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

FIG. 1 is a system configuration diagram showing an example of a broadcast communication system including a broadcast receiving apparatus according to a first embodiment. It is explanatory drawing of the outline|summary of the encoded 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 which uses MMT. It is a hierarchical block diagram of control information used in a broadcasting system. It is a list of tables used in TLV-SI of the broadcasting system. 6 is a list of descriptors used in TLV-SI of the broadcasting system. 3 is a list of messages used in MMT-SI of the broadcasting system. It is a list of tables used in MMT-SI of the broadcasting system. It is a list (part 1) of descriptors used in MMT-SI of the broadcasting system. It is a list (part 2) of descriptors used in MMT-SI of the broadcasting system. It is a figure which shows the data transmission of a broadcasting system, and the relationship of each table. FIG. 3 is a block diagram of a broadcast receiving apparatus according to the first embodiment. 3 is a configuration diagram of a logical plane structure of a presentation function of the broadcast receiving apparatus according to the first embodiment. FIG. FIG. 3 is a system configuration diagram of clock synchronization/presentation synchronization of the broadcast receiving apparatus according to the first embodiment. FIG. 3 is a software configuration diagram of the broadcast receiving apparatus according to the first embodiment. FIG. 3 is a block diagram of a broadcasting station server according to the first embodiment. 3 is a block diagram of a service provider server according to the first embodiment. FIG. FIG. 3 is a block diagram of the mobile information terminal according to the first embodiment. 3 is a software configuration diagram of the portable information terminal according to the first embodiment. FIG. It is a figure which shows the data structure of MH-TOT of a broadcasting system. It is a figure which shows the format of the JST_time parameter of a broadcasting system. FIG. 5 is a diagram showing a method of calculating the current date from the MJD of the broadcast receiving device according to the first embodiment. It is a figure which shows the structure of the NTP format of a broadcasting system. It is a figure which shows the data structure of the MPU time stamp descriptor of a broadcasting system. It is a figure which shows the data structure of the time information of the TMCC extended information area of a broadcasting system. FIG. 7 is an operation sequence diagram during channel scanning of the broadcast receiving apparatus according to the first embodiment. It is a figure which shows the data structure of TLV-NIT of a broadcasting system. It is a figure which shows the data structure of the satellite distribution system descriptor of a broadcasting system. It is a figure which shows the data structure of the service list descriptor of a broadcasting system. It is a figure which shows the data structure of AMT of a broadcasting system. FIG. 7 is an operation sequence diagram when the broadcast receiving apparatus according to the first embodiment selects a channel. It is a figure which shows the data structure of MPT of a broadcasting system. It is a figure which shows the data structure of LCT of a broadcasting system. It is a figure which shows the example of the allocation of the layout to the layout number based on LCT. It is a figure which shows the example of the allocation of the layout to the layout number based on LCT. It is a figure which shows the example of the allocation of the layout to the layout number based on LCT. It is a figure which shows the example of the allocation of the layout to the layout number based on LCT. It is a figure explaining operation|movement of the exceptional process of the screen layout control based on LCT. It is a figure explaining operation|movement of the exceptional process of the screen layout control based on LCT. It is a figure which shows the data structure of MH-EIT of a broadcasting system. 3 is a screen display diagram of an EPG screen of the broadcast receiving apparatus according to the first embodiment. FIG. 3 is a screen display diagram of an EPG screen of the broadcast receiving apparatus according to the first embodiment. FIG. 3 is a screen display diagram of an EPG screen of the broadcast receiving apparatus according to the first embodiment. FIG. 3 is a screen display diagram when displaying an emergency alert broadcast of the broadcast receiving apparatus according to the first embodiment. FIG. FIG. 7 is a block diagram of a broadcast receiving device according to a second embodiment. It is a figure explaining the inconsistency of the present time display at the time of broadcast service change. FIG. 9 is a diagram illustrating an operation of selection control of a current time information reference source according to the second embodiment. FIG. 9 is an operation sequence diagram of a current time information update process according to the second embodiment. 7 is a screen display diagram of an EPG screen of the broadcast receiving apparatus according to the second embodiment. FIG. 7 is a screen display diagram of an EPG screen of the broadcast receiving apparatus according to the second embodiment. FIG. FIG. 9 is a system configuration diagram of a broadcast communication system according to a third embodiment. It is a figure which shows the data structure of the content information descriptor of a broadcasting system. It is a figure explaining the meaning of the content type in the content information descriptor of a broadcasting system. It is a figure explaining the meaning of a source device primary color chromaticity coordinate and a source device white chromaticity coordinate in a content information descriptor of a broadcasting system. It is a figure explaining the meaning of EOTF identification in the content information descriptor of a broadcasting system. FIG. 9 is a screen display diagram of an EPG screen of the broadcast receiving device according to the third embodiment. It is a figure explaining the gap of the color gamut of a source device and a monitor device. FIG. 9 is a diagram illustrating a gamut conversion process of the broadcast receiving device according to the third embodiment. FIG. 9 is a diagram illustrating a gamut conversion process of the broadcast receiving device according to the third embodiment. FIG. 9 is a diagram illustrating image quality adjustment items of the broadcast receiving device according to the third embodiment. FIG. 10 is a diagram illustrating a brightness level conversion process of the broadcast receiving device according to the third embodiment. FIG. 10 is a diagram illustrating a brightness level conversion process of the broadcast receiving device according to the third embodiment. FIG. 9 is a system configuration diagram of a broadcast communication system according to a fourth embodiment. FIG. 9 is a block diagram of a broadcast receiving device according to a fourth embodiment. FIG. 9 is a software configuration diagram of a broadcast receiving device according to a fourth embodiment. FIG. 9 is an interface configuration diagram of a broadcast receiving device and a monitor device according to a fourth embodiment. FIG. 11 is a diagram illustrating mastering information output by the broadcast receiving device according to the fourth embodiment. FIG. 10 is a system configuration diagram of a broadcast communication system according to a fifth embodiment. FIG. 16 is a diagram illustrating an example of output control information according to the fifth embodiment. FIG. 16 is a diagram illustrating an example of reception control information according to the fifth embodiment. FIG. 16 is a diagram illustrating an example of reception control information according to the fifth embodiment. FIG. 16 is a diagram illustrating an example of reception control information according to the fifth embodiment. FIG. 16 is a diagram illustrating an example of reception control information according to the fifth embodiment. FIG. 16 is a diagram illustrating an example of a content output protection determination process according to a fifth embodiment. FIG. 16 is a diagram illustrating an example of a content output protection determination process according to a fifth embodiment. FIG. 16 is a diagram illustrating an example of a content output protection determination process according to a fifth embodiment.

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

[System configuration]
FIG. 1 is a system configuration diagram showing an example of a broadcast communication system including the broadcast receiving apparatus of the present embodiment. The broadcast communication system according to the present embodiment includes a broadcast receiving device 100, an antenna 100a, a broadband network such as the Internet 200, a router device 200r, an access point 200a, a radio tower 300t of a broadcasting station, a broadcasting satellite (or communication satellite) 300s, and a broadcasting station. The server 300, the service provider server 400, the other application servers 500, the mobile telephone communication server 600, the base station 600b of the mobile telephone communication network, and the 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 directly received 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 send and receive data by communicating with each server apparatus on the Internet 200 and other communication devices.

The router device 200r is connected to the Internet 200 by wire communication, is connected to the broadcast receiving device 100 by wire communication or wireless communication, and is connected to the portable information terminal 700 by wireless communication. A method such as Wi-Fi (registered trademark) may be used for the wireless communication. As a result, each server device on the Internet 200 or other communication device, the broadcast receiving device 100, and the portable information terminal 700 can exchange data with each other via the router device 200r. The broadcast receiving apparatus 100 and the portable information terminal 700 may communicate directly with each other by a method such as BlueTooth (registered trademark) or NFC (Near Field Communication) without passing through the router apparatus 200r.

The radio tower 300t is a broadcasting facility of a broadcasting station, and sends out a broadcast wave including coded data of a broadcast program, 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 frequency conversion and the like as appropriate, and then transmits the broadcast to the antenna 100a connected to the broadcast receiving apparatus 100. It is a repeater that retransmits waves. In addition, the broadcasting station includes a broadcasting station server 300. The broadcasting station server 300 stores metadata such as broadcast programs (moving image contents, etc.) and program titles, program IDs, program outlines, cast information, broadcasting date and time of each broadcasting program, and stores the moving image contents and each metadata. , It is possible to provide to the service provider based on the contract. It should be noted that the provision of the moving image content and each metadata to the service provider may be performed through an API (Application Programming Interface) included in the broadcasting station server 300.

The service provider server 400 is a server device prepared by the service provider, and is capable of providing various services linked to broadcast programs distributed from a broadcast station. The service provider server 400 also stores, manages, and distributes moving image content and metadata provided by the broadcast station server 300, and various content and applications that cooperate with broadcast programs. In addition, in response to an inquiry from a television receiver or the like, it also has a function of searching available contents and applications and providing a list. Note that the storage, management and distribution of the content and metadata and the storage, management and distribution of the application may be performed by different server devices. The broadcasting station and the service provider may be the same or different. A plurality of service provider servers 400 may be prepared for different services. Also, the function of the service provider server 400 may be included in the broadcasting station server 300.

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

The mobile telephone communication server 600 is connected to the Internet 200, while being 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 mobile information terminal 700, and each server device on the mobile information terminal 700 and the Internet 200 and other communication devices. Data can be sent and received by communicating with. Communication between the base station 600b and the portable information terminal 700 is performed by a W-CDMA (Wideband Code Division Multiple Access) (registered trademark) method, a GSM (Global System for Mobile communications) (registered trademark) method, or an LTE (Long-term Evolution) method. Alternatively, another communication method may be used.

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

[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 method for transmitting data such as video and audio. It is assumed that the television receiver is compatible with MMT (MPEG Media Transport) instead of TS (Transport Stream) (hereinafter, referred to as MPEG2-TS). The television receiver may be compatible with both MPEG2-TS and MMT.

The MPEG2-TS is characterized in that components such as video and audio forming a program are multiplexed into one stream together with a control signal and a clock. Since it is handled as one stream including the clock, it is suitable for transmitting one content through one transmission path with secured transmission quality, and has been adopted in many conventional digital broadcasting systems. On the other hand, the functions of MPEG2-TS against recent environmental changes related to content distribution, such as diversification of content, diversification of devices that use content, diversification of transmission channels for content distribution, diversification of content storage environment, etc. Due to the limitations of MMT, the newly established media transport method is MMT.

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

The MMTP packet is composed of a header part and an MMTP payload, and is supposed to transmit control information of MFU and MMT. The MMTP payload has a payload header according to the contents (data unit) stored in the payload section. FIG. 2C shows an example of an outline of constructing an MFU from a video/audio signal, storing it in an MMTP payload, and constructing an MMTP packet. It should be noted 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 may be stored in one payload part. If 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 AL-FEC (Application Layer Forward Error Correction) or ARQ (Automatic Repeat Request) in order to recover a packet loss on the transmission path.

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

For transmission of the MMTP packet, 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 addition, it is assumed that a TLV (Type Length Value) multiplexing method is used in the broadcast transmission path for efficient transmission of IP packets. FIG. 3 shows an example of the protocol stack of the broadcasting system of this embodiment. In the figure, (A) is an example of a protocol stack in a broadcast transmission path, and (B) is an example of a protocol stack in a communication line.

In the broadcasting system of the present embodiment, a mechanism for transmitting two types of control information of 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 and the like. It is assumed that the format of the MMT control message is such that it is carried in the MMTP payload to form an MMTP packet, which is then transmitted as an IP packet. The TLV-SI is control information related to multiplexing of IP packets, and provides information for channel selection and IP address/service correspondence information.

Also, in a broadcasting system using MMT, time information is transmitted to provide absolute time. It should be noted that while the MPEG2-TS indicates the display time of the component based on a clock that is different for each TS, the MMT indicates that the display time of the component is based on the Coordinated Universal Time (UTC). To do. With these mechanisms, it becomes possible for the terminal device to synchronously display the components transmitted from different transmission points through different transmission paths. It is assumed that an NTP (Network Time Protocol) format IP packet is used to provide UTC.

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

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

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

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

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

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

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

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

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

(4) Network Name Descriptor The network name descriptor describes the network name using character codes.

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

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

(1) PA Message A 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 for transmitting the section short format of MPEG-2 Systems.

(5) Data Transmission Message The data transmission message is a message that stores a table related to data transmission.

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

<Table used in MMT-SI>
FIG. 6B shows a list of “tables” used in MMT-SI of the broadcasting system to which the broadcasting receiving apparatus 100 of the present embodiment corresponds. The table is control information having elements and attributes that indicate specific information, and is stored in a message and transmitted as an MMTP packet. The message that stores 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) gives information that constitutes a package such as a list of assets and a position of the asset on the network. The MPT may be stored in the PA message.

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

(3) LCT
The 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
Entry Control Message (ECM) is common information including program information and control information, and delivers key information for descrambling and the like. The ECM may be stored in the M2 section message.

(5) EMM
The Entitlement Management Message (EMM) transmits individual information including contract information for each subscriber and key information for deciphering ECM (common information) encryption. 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 the conditional access system. The CAT(MH) may be stored in the CA message.

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

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

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

(10) MH-AIT
The MH-Application Information Table (MH-AIT) stores all the information about the application, the 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 to present information on broadcasters existing on the network. The MH-BIT may be stored in the M2 section message.

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

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

(14) MH-TOT
The MH-Time Offset Table (MH-TOT) transmits JST time and date (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 for all receivers that receive the MH-Common Data Table to transmit the common data to be stored in the nonvolatile memory in a section format. The MH-CDT may be stored in the M2 section message.

(16) DDM table A data directory management table (DDM table) provides a directory structure of files that make up an application in order to separate an application file structure and a file transmission structure. The DDM table may be stored in the data transmission message.

(17) DAM table The data asset management table (Data Asset 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 A data content management 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
The event message table (Event Message Table: EMT) is used to transmit information about the event message. The EMT may be stored in the M2 section message.

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

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

(1) Asset Group Descriptor The asset group descriptor provides a group relationship of assets and a priority within the group. 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 placed in the MH-EIT carried in the M2 section message.

(3) Background Color Designation Descriptor The background color designation descriptor provides the background color of the backmost color in the layout designation. The background color designation descriptor may be placed in the LCT.

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

(6) Dependency Descriptor The dependency relationship descriptor provides the asset ID of the asset having a dependency relationship. The dependency descriptor may be located 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 system descriptor The scramble system descriptor provides information for identifying the encryption target and the type of encryption algorithm when scrambling. The scramble method descriptor may be arranged in MPT or CAT (MH).

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

(10) Emergency information descriptor (MH)
The emergency information descriptor (MH) is used when performing an emergency alert broadcast. 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 encoding parameters of an audio stream of ISO/IEC 14496-3 (MPEG-4 audio). Used 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 setting 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 ITU-T Recommendation H.264. H.265|ISO/IEC 23008-2 Used to describe basic coding parameters of a video stream (HEVC stream). The MH-HEVC video descriptor may be located in the MPT.

(14) MH-Link Descriptor The MH-Link Descriptor identifies the service provided when a viewer requests additional information related to a particular one described in the Program Sequence Information System. The MH-link descriptor may be located in the MPT, MH-EIT, MH-SDT, etc.

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

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

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

(19) Video Component Descriptor The video component descriptor indicates parameters and explanations related to the video component, and is also used to represent the elementary stream in a character format. The video component descriptor may be located in the 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 by this label. .. The MH-stream identification descriptor may be located 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 age-based parental control, and is used to extend the parental rate descriptor based on other restriction conditions. The MH-Parent Rate Descriptor may be located in the MPT or MH-EIT.

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

(24) MH-Target Area Descriptor The MH-Target Area Descriptor is used to describe a target area of 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 placed in the MH-EIT.

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

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

(28) MH-Service Descriptor The MH-Service Descriptor represents the organization channel name and its operator name together with the service format type by character codes. 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 flows that make up 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 base. 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 file transmitted by the application transmission method. The MH-Type descriptor may be placed in the DAM table.

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

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

(35) MH-Data Coding Scheme Descriptor The MH-Data Coding Scheme Descriptor is used to identify the data coding scheme. The MH-Data Coding Scheme Descriptor may be located in the MPT.

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

(37) Event Message Descriptor The event message descriptor conveys information regarding 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 when the actual time (for example, UTC+9 hours) and the display time to the human system have a constant offset value when the summer time is executed. The MH-Local Time Offset Descriptor may be located in the MH-TOT.

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

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

(43) MH-Network Download Content Descriptor The MH-Network Download Content Descriptor is used to describe the attribute information of the 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 and 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 to indicate the details of the acquisition source of the application. The MH-Simple Application Location Descriptor may be located in the MH-AIT.

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

(48) MH-Launch Priority Information Descriptor The MH-Launch priority information descriptor is written to specify the launch priority of the application. The MH-activation priority information descriptor may be located in the MH-AIT.

(49) MH-Cache Information Descriptor The MH-Cache Information Descriptor is written to be used for cache control when the resources constituting the application are cached and retained when the reuse of the application is expected. .. The MH-cache information descriptor may be located in the MH-AIT.

(50) MH-stochastic application delay descriptor The MH-stochastic application delay descriptor delays the timing of application control by a stochastically set delay amount, assuming load distribution of server access for application acquisition. To describe. The MH-Probabilistic Apply Delay Descriptor may be located in the MH-AIT.

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

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

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

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

<Relationship between data transmission and each control information in MMT system>
Here, with reference to FIG. 6E, the relationship between data transmission and a typical table in the broadcast system to which the broadcast receiving apparatus 100 of the present embodiment corresponds will be described.

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 routes such as a TLV stream via a broadcast transmission path and an IP data flow via a communication line. The TLV stream includes TLV-SI such as TLV-NIT and AMT, and IP data flow which is a data flow of IP packet. The IP data flow includes a video asset including a series of video MPUs and an audio asset including a series of audio MPUs. Similarly, the IP data flow may include a subtitle asset including a series of subtitle MPUs, a character superasset including a series of character super MPUs, a data asset including a series of data MPUs, and the like. These various assets are associated in the unit of "package" by the MPT (MMT package table) stored and transmitted in the PA message. Specifically, the MPT has a package ID (corresponding to the “MMT_package_id_byte” parameter shown in FIG. 17 described later) and an asset ID of each asset included in the package (corresponding to the “asset_id_byte” parameter shown in FIG. 17 described later). Is described, the association is performed.

The assets constituting the package may be only the assets in the TLV stream, but may also include the assets transmitted by the IP data flow of the communication line, as shown in FIG. 6E. This is because the location information of each asset included in the package (corresponding to “MMT_general_location_info()” shown in FIG. 17, which will be described later) is included in the MPT, and the broadcast receiving apparatus 100 of the present embodiment refers to each asset. It can be realized by making it possible to grasp. Specifically, by changing the value of the “MMT_general_location_infolocation_type” parameter arranged in the location information,
(1) Data multiplexed in the same IP data flow as MPT (location_type=0x00)
(2) Data multiplexed in IPv4 data flow (location_type=0x01)
(3) Data multiplexed in IPv6 data flow (location_type=0x02)
(4) Data multiplexed in MPEG2-TS for broadcasting (location_type=0x03)
(5) Data multiplexed in the MPEG2-TS format within the IP data flow (location_type=0x04)
(6) Data in specified URL (location_type=0x05)
It is possible to configure the broadcast receiving apparatus 100 to refer to various data transmitted through various transmission paths.

Among the above-mentioned reference destinations, (1) is, for example, an IP data flow received via a digital broadcast signal received by the tuner/demodulation unit 131 of the broadcast receiving apparatus 100 of FIG. 7A described later. When the MPT is also included in the IP data flow on the communication line side and transmitted, the reference destination of (1) may be the IP data flow received by the LAN communication unit 121 to be described later via the communication line. Further, (2), (3), (5), and (6) are IP data flows received by the LAN communication unit 121 described later via a communication line. Further, the above (4) is, for example, a receiving function for receiving a digital broadcast signal using the MMT method and a digital broadcast using the MPEG2-TS method, as in a broadcast receiving apparatus 800 of Embodiment 2 shown in FIG. 24 described later. In the case of a broadcast receiving apparatus having both a reception function of receiving a signal, a digital broadcast using the MPEG2-TS system based on MPT location information (“MMT_general_location_info()”) included in a digital broadcast signal using the MMT system. This can be used when referring to the data multiplexed in the MPEG2-TS that is received by the reception function that receives the signal.

Although the data forming the “package” is designated in this way, in the broadcasting system supported by the broadcast receiving apparatus 100 of the present embodiment, a series of data in the “package” unit is converted into a “service” unit of digital broadcasting. Treat as.

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

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

[Hardware configuration of broadcast receiving device]
FIG. 7A is a block diagram showing an example of the internal configuration of 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. To be done.

The main control unit 101 is a microprocessor unit that controls the entire broadcast receiving apparatus 100 according to a predetermined operation program. The system bus 102 is a data communication path for transmitting and receiving data between the main control unit 101 and each 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 Program 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 when the basic operation program and other operation programs are executed. The ROM 103 and the RAM 104 may be integrated with the main control unit 101. The ROM 103 may use a partial storage area in the storage (accumulation) unit 110 instead of the independent configuration shown in FIG. 7A.

The storage unit 110 stores an operation program and operation setting values of the broadcast receiving apparatus 100, personal information of the user of the broadcast receiving apparatus 100, and the like. Further, it is possible to store the operation program downloaded through the Internet 200, various data created by the operation program, and the like. In addition, it is possible to store contents such as moving images, still images, and sounds acquired from broadcast waves or downloaded via the Internet 200. All or some of the functions of the ROM 103 may be replaced with a partial area of the storage (accumulation) unit 110. Further, the storage (accumulation) unit 110 needs to hold the stored information even when the broadcast receiving apparatus 100 is not supplied with power from the outside. Therefore, for example, a nonvolatile semiconductor element memory such as a flash ROM or an 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 a download process 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/receives data to/from each server device on the Internet 200 and other communication devices. Further, the MMT data string (or part thereof) of the program transmitted via the communication line is also 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 and a decoding circuit. Further, the broadcast receiving device 100 may further include other communication units such as a BlueTooth (registered trademark) communication unit, an NFC communication unit, and an infrared communication unit.

The tuner/demodulation unit 131 receives the broadcast wave transmitted from the radio tower 300t via the antenna 100a, and tunes (tunes in) to the channel of the service desired by the user under the control of the main control unit 101. Further, the tuner/demodulation unit 131 demodulates the received broadcast signal to acquire the MMT data string. Note that the example shown in FIG. 7A illustrates a configuration in which there is one tuner/demodulation unit, but the broadcast receiving device 100 has a tuner/demodulation unit for the purpose of simultaneous display of a plurality of screens, recording of back program, and the like. It may be configured to mount a plurality of units.

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

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

The character super decoder 144 decodes the character super data string input from the separating unit 132 and outputs the character super information. The subtitle decoder 145 decodes the subtitle data string input from the separation unit 132 and outputs subtitle information. The character super information output from the character super decoder 144 and the caption information output from the caption decoder 145 are subjected to a compositing process in the caption composition unit 146, and further, in the caption color gamut conversion unit 147, in the video composition unit 161. Color space conversion processing is performed as necessary for the video composition processing. In the present embodiment, of the services centered on character information, which are presented at the same time as the video of the broadcast program, those related to the content of the video are called subtitles, and other services are called superscripts. To do. When they are not distinguished, they are collectively referred to as subtitles.

The browser unit 154 receives 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 thereof, and outputs the control information and the LAN included in the MMT data string. The application information is presented according to the instruction of the application control unit 153 that interprets the control information acquired from the server device on the Internet 200 via the communication unit 121. The multimedia application file may be an HTML (Hyper Text Markup Language) document, a BML (Broadcast Markup Language) document, or the like. The application information output from the browser unit 154 is further subjected to a color space conversion process in the application color gamut conversion unit 155 for the image combination process in the image combination unit 161. The browser unit 154 also plays back the application voice information by acting on the sound source unit 156.

The video composition unit 161 inputs the video information output from the video color gamut conversion unit 142, the subtitle information output from the subtitle color gamut conversion unit 147, the application information output from the application color gamut conversion unit 155, and the like as appropriate. 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 the video information and the like input to the video RAM. Further, the video synthesizing unit 161 is, under the control of the main control unit 101, an EPG (Electronic Program Guide) created based on information such as scaling processing and MH-EIT included in MMT-SI, as necessary. Superimposes screen information. The monitor unit 162 is, for example, a display device such as a liquid crystal panel, and provides the user of the broadcast receiving apparatus 100 with the video information selected and/or superposed by the video composition unit 161. The video output unit 163 is a video output interface that outputs the video information selected and/or superposed by the video synthesis unit 161.

The presentation function of the broadcast receiving apparatus 100 according to the present embodiment has a logical plane structure in order to display the multimedia service as intended by the provider. FIG. 7B shows an example of the configuration of the logical plane structure included in the presentation function of the broadcast receiving device 100 according to the present embodiment. In the logical plane structure, the character super plane for displaying the character super is arranged on the forefront, and the subtitle plane for displaying the subtitle is arranged on the next layer. On the third layer, a multimedia plane for displaying broadcast images, multimedia applications, or composite images thereof is arranged, and a background plane is arranged at the back. In the subtitle composition unit 146 and the video composition unit 161, drawing of the character super information on the character super plane, drawing of subtitle information on the subtitle plane, and drawing on the multimedia plane of video information, application information, etc. are performed. Further, the background color is drawn on the background plane based on the LCT included in the MMT-SI. A plurality of third-layer multimedia planes can be prepared according to the number of video decoders 141. However, even when there are a plurality of multimedia planes, the application information output from the application color gamut conversion unit 155 is output only to the foremost multimedia plane.

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

The expansion interface unit 124 is an interface group for expanding the function of the broadcast receiving apparatus 100, and in the present embodiment, it is composed of an analog video/audio interface, a USB (Universal Serial Bus) interface, a memory interface, and the like. To do. The analog video/audio interface inputs an analog video signal/audio signal from an external video/audio output device, outputs an analog video signal/audio signal to an external video/audio input device, and the like. The USB interface is connected to a PC or the like to send and receive data. A HDD may be connected to record broadcast programs and contents. Alternatively, a keyboard or other USB device may be connected. The memory interface connects to a memory card or other memory medium to send and receive data.

The digital interface unit 125 is an interface that outputs or inputs encoded digital video data and/or digital audio data. The digital interface unit 125 can output the MMT data sequence demodulated by the tuner/demodulation unit 131, the MMT data sequence acquired via the LAN communication unit 121, or the mixed data of the MMT data sequences as they are. I shall. Further, the MMT data string input from the digital interface unit 125 may be controlled to be input to the separation unit 132. The output of the digital content stored in the storage (storage) unit 110 or the storage of the digital content in the storage (storage) unit 110 may be performed via the digital interface unit 125.

The digital interface unit 125 is a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, or the like, and outputs or inputs data in a format conforming to the DVI specification, the HDMI specification, the Display Port specification, or the like. It may be one. It may be output or input in the form of serial data conforming to the IEEE 1394 specifications and the like. Further, it may be configured as an IP interface that outputs a digital interface via hardware such as Ethernet (registered trademark) or wireless LAN. In this case, the digital interface unit 125 and the LAN communication unit 121 may share the hardware configuration thereof.

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

Note that, as described above, when the broadcast receiving device 100 is a television receiver or the like, the video output unit 163 and the audio output unit 166 are not essential configurations for 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, and an STB (Set Top Box). 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 and a broadcast communication cooperation function. When the broadcast receiving device 100 is a DVD recorder, an HDD recorder, an STB, or the like, the monitor unit 162 and the speaker unit 165 may not be provided. By connecting an external monitor and an external speaker to the video output unit 163 and the audio output unit 166 or the digital interface unit 125, the same operation as that of the broadcast receiving apparatus 100 of this embodiment can be performed.

[System configuration of broadcast receiver clock synchronization/presentation synchronization]
FIG. 7C is an example of a system configuration of clock synchronization/presentation synchronization in the broadcast system to which the broadcast receiving apparatus 100 of the present embodiment corresponds. In the broadcast system of the present embodiment, UTC is transmitted from the broadcast transmission system to the receiver (the broadcast receiving apparatus 100 or the like of this embodiment) in the 64-bit length NTP time stamp format. In the NTP time stamp format, “less than a second” of UTC is represented by 32 bits, and “less than a second” is represented by 32 bits. However, in reality, it is difficult to reproduce 1 second with 32-bit accuracy. Therefore, as the system clock for synchronizing the video system and the system clock for operating the NTP type clock, for example, "2 to the 24th power" Hz (about 16.8 MHz) as shown in FIG. You may make it use the frequency of. In consideration of the fact that the system clock in the conventional broadcasting system is 27 MHz and that the hardware configuration of the receiver can be easily constructed, the number of 2's of "2 to the 24th power" to "2 to the 28th power" is considered. It is desirable to use the power frequency as the system clock.

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

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

On the receiver side, the time information in the NTP length format is received via the broadcast transmission line, and the receiver system clock is reproduced by the PLL system based on the VCO of "2 to the power of n" Hz, similarly to the broadcast transmission system side. As a result, the reception system clock becomes a clock synchronized with the broadcast transmission system side. By operating the signal processing system of the receiver in synchronism 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. Here, the MPT stored in the PA message transmitted by the broadcast signal stores the MPU time stamp descriptor shown in FIG. 13B described later. The “mpu_sequence_number (MPU sequence number)” parameter in the MPU time stamp descriptor of FIG. 13B indicates the sequence number of the MPU describing the time stamp, and the “mpu_presentation_time (MPU presentation time)” parameter indicates the presentation time of the MPU as 64-bit NTP. It is shown in the time stamp format. Therefore, the receiver can refer to the MPU time stamp descriptor stored in the MPT and control the presentation (display, output, etc.) timing of each MPU such as a video signal, an audio signal, a caption, and a character super. ..

When focusing on the control of the decoding timing and the presentation timing of each presentation unit of the above-mentioned video/audio signals, the synchronization of the video/audio signals can be achieved by a clock of about “2 to the 16th power” Hz (about 65.5 KHz). Can be secured, and in this case, it is not necessary to refer to the lower 16 bits of the NTP time stamp format described in the MPU time stamp descriptor or the like. That is, when a "2 m-th power" Hz clock generated by dividing the system clock or the like is used to control the decoding timing and the presentation timing, the lower level of the NTP time stamp format described in the MPU time stamp descriptor or the like is used. It is not necessary to refer to the "32-m" bit. Therefore, the lower "32-m" bits of the NTP time stamp format described in the MPU time stamp descriptor or the like may be fixed to "0" or "1".

[Software configuration of broadcast receiving device]
FIG. 7D is a software configuration diagram of the broadcast receiving apparatus 100 of the present embodiment, and shows a software configuration of the ROM 103, the RAM 104, and the storage (accumulation) unit 110. In this embodiment, the ROM 103 stores the basic operation program 1001 and other operation programs, and the storage (accumulation) unit 110 stores the reception function program 1002 and other operation programs. In addition, the storage (accumulation) unit 110 stores a content storage area 1200 that stores content such as moving images, still images, and audio, and authentication that stores authentication information and the like necessary for accessing an external mobile terminal device or each server device. 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 to form a basic operation execution unit 1101. The reception function program 1002 stored in the storage unit 110 is also expanded in the RAM 104, and the main control unit 101 executes the expanded reception function program to configure the reception function execution unit 1102. To do. Further, the RAM 104 has a temporary storage area for temporarily holding the data created at the time of executing each operation program as needed.

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

The reception function execution unit 1102 controls each operation block of the broadcast reception device 100 in order to reproduce components such as video and audio transmitted by the broadcast system of this embodiment. In particular, the transport processing unit 1102a mainly controls the MMT decoder function of the separating 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 subtitle processing unit 1102e mainly controls the subtitle decoder 145. The general-purpose data processing unit 1102f mainly controls the data decoder 151. The EPG generation unit 1102g interprets the description content such as MH-EIT included in MMT-SI to generate an EPG screen. The presentation processing unit 1102h, based on the logical plane structure, 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. Control mainly.

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

[Broadcast server configuration]
FIG. 8 is a block diagram showing 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 controller 301 is a microprocessor unit that controls the entire broadcasting station server 300 according to a predetermined operation program. The system bus 302 is a data communication path for transmitting and receiving data between the main control unit 301 and each operation block in the broadcasting station server 300. The RAM 304 serves as a work area when each operation program is executed.

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

In addition, 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, respectively, and the main control unit 301 executes the expanded programs. Thus, the basic operation execution unit 3101, the broadcast content management/distribution execution unit 3102, and the broadcast content transmission execution unit 3103 are configured.

In order to simplify the description, a process of controlling each operation block by expanding the basic operation program 3001 stored in the storage unit 310 into the RAM 304 and executing the basic operation program 3001 will be basically described below. The operation execution unit 3101 is described as controlling each operation block. The same description is made for other operation programs.

The broadcast content management/delivery execution unit 3102 manages the program content and the like of each broadcast program accumulated in the broadcast content storage area 3200 and the metadata storage area 3300 and each metadata, and the program content of each broadcast program and the like. Controls when providing metadata to service providers based on contracts. Further, the broadcast content management/distribution execution unit 3102, when providing the program content and the like of each broadcast program and each metadata to the service provider, the service provider based on the contract as necessary. Authentication processing or the like 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, the copy control information of the program content, and the like. The time schedule management etc. when transmitting the including MMT data sequence from the radio tower 300t via the digital broadcast signal transmitting unit 360 are performed.

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

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

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

The storage unit 410 stores 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. A region 4500 is provided. The video content storage area 4200 stores the program content of the broadcast program provided by the broadcast station server 300 as video content. In addition, it stores the video content and the like produced by the service provider. The metadata storage area 4300 stores each metadata provided from the broadcasting station server 300, metadata about the video content produced by the service provider, and the like. The application storage area 4400 stores various applications and the like for implementing a service linked to a broadcast program, which is distributed in response to a request from each television receiver. The user information storage area 4500 stores information (personal information, authentication information, etc.) regarding users who are permitted to access the service provider server 400.

Also, 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, respectively, and the main control unit 401 is further expanded by the expanded basic operation program and video. By executing the content management/distribution program and the application management/distribution program, the basic operation execution unit 4101, the video content management/distribution execution unit 4102, and the application management/distribution execution unit 4104 are configured.

It should be noted that, in order to simplify the description, a process of controlling each operation block by expanding the basic operation program 4001 stored in the storage unit 410 into the RAM 404 and executing the basic operation program 4001 will be basically described below. 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/delivery execution unit 4102 acquires the program content and the like of the broadcast program and the metadata from the broadcast station server 300, the video content and the like stored in the video content storage area 4200 and the metadata storage area 4300, and each metadata. And control of distribution of the video content and the like and each metadata to each television receiver. Furthermore, the video content management/distribution execution unit 4102 performs, when necessary, the authentication processing of each TV receiver when distributing each of the video contents and the like and each metadata to each TV receiver. You can go. The application management/distribution execution unit 4104 also manages each application stored in the application storage area 4400 and controls the distribution of each application in response to a request from each television receiver. Further, the application management/distribution executing unit 4104 may perform an authentication process or the like for each of the television receivers as needed when distributing the applications to each of the television receivers.

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 or the router device 200r. The LAN communication unit 421 includes a coding circuit, a decoding circuit, and the like.

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

The main control unit 701 is a microprocessor unit that controls the entire mobile information terminal 700 according to a predetermined operation program. The system bus 702 is a data communication path for transmitting and receiving data between the main control unit 701 and each operation block in the 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, and 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 controller 701. The ROM 703 may use a partial storage area in the storage unit 710 instead of the independent configuration shown in FIG. 10A.

The storage unit 710 stores an operation program and operation setting values of the mobile information terminal 700, personal information of the user of the mobile information terminal 700, and the like. Further, it is possible to store the operation program downloaded through the Internet 200, various data created by the operation program, and the like. It is also possible to store contents such as moving images, still images, and sounds downloaded via the Internet 200. All or some of the functions of the ROM 703 may be replaced with a partial area of the storage unit 710. Further, the storage unit 710 needs to hold the 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.

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

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

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

The operation unit 730 is an instruction input unit for inputting an operation instruction to the portable information terminal 700, and in the present embodiment, it is configured by a touch panel 730t arranged on the display unit 741 and an operation key 730k in which button switches are arranged. I shall. Only one of them may be used. The portable information terminal 700 may be operated using a keyboard or the like connected to the expansion interface unit 724. The portable information terminal 700 may be operated using a separate terminal device connected by wire communication or wireless communication. That is, the portable information terminal 700 may be operated from the broadcast receiving apparatus 100. Further, the touch panel function may be included in the display unit 741.

The image processing unit 740 includes a display unit 741, an image signal processing unit 742, a first image input unit 743, and a second image input unit 744. The display unit 741 is, for example, a display device such as a liquid crystal panel, and provides the user of the portable information terminal 700 with the image data processed by the image signal processing unit 742. The image signal processing unit 742 includes a video RAM (not shown), and the display unit 741 is driven based on the image data input to the video RAM. Further, the image signal processing unit 742 is assumed to have a function of performing format conversion, superimposing processing of a menu and other OSD (On Screen Display) signals, 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 voice processing unit 750 includes a voice output unit 751, a voice signal processing unit 752, and a voice input unit 753. The audio output unit 751 is a speaker and provides the user of the mobile information terminal 700 with the audio signal processed by the audio signal processing unit 752. The voice input unit 753 is a microphone and converts a user's voice or 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. ,,. With these sensor groups, it becomes possible to detect the position, inclination, direction, movement, and ambient brightness of the portable information terminal 700, the proximity of surrounding objects, and the like. Further, the portable information terminal 700 may further include another sensor such as an atmospheric pressure sensor.

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

Note that the configuration example of the portable information terminal 700 shown in FIG. 10A includes a large number of configurations that are not essential to this embodiment, such as the sensor unit 760, but even if these configurations are not provided, this embodiment Does not impair the effect of. Further, a configuration (not shown) such as a digital broadcast receiving function and an electronic money settlement function may be further added.

[Software configuration of mobile information terminal]
FIG. 10B is a software configuration diagram of the portable information terminal 700 of the present embodiment, and shows the software configurations of the ROM 703, the RAM 704, and the storage unit 710. In this embodiment, the ROM 703 stores the basic operation program 7001 and other operation programs, and the storage unit 710 stores the cooperation control program 7002 and other operation programs. The storage unit 710 also stores a content storage area 7200 for storing content such as moving images, still images, and audio, an authentication information storage area 7300 for storing authentication information necessary for accessing a television receiver or each server device, Various information storage areas for storing other various information are provided.

The 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 form a basic operation execution unit 7101. Further, the cooperation control program 7002 stored in the storage unit 710 is similarly expanded in the RAM 704, and the main control unit 701 further executes the expanded cooperation control program to form a cooperation control execution unit 7102. Further, the RAM 704 has a temporary storage area for temporarily holding the data created during the execution of each operation program as needed.

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

The cooperation control execution unit 7102 manages device authentication and connection, transmission and reception of each data, and the like when the portable information terminal 700 performs a cooperative operation with the television receiver. Further, the cooperation control execution unit 7102 is assumed to have a browser engine function for executing an application that works in conjunction with the television receiver.

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

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

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

On the other hand, the information transmitted by MH-TOT is as follows. The broadcast receiving apparatus 100 is assumed to be able to acquire the current date and Japan Standard Time by MH-TOT. FIG. 11A shows an example of the data structure of MH-TOT. The broadcast receiving apparatus 100 can acquire the current date and the current time from the “JST_time” parameter of the MH-TOT. As shown in FIG. 11B, the “JST_time” parameter includes four lower four bits of the lower 16 bits of the encoded data of the current date according to the Modified Julian Date (MJD) and the Japanese Standard Time (JST). It is assumed that it includes 24-bit information represented by a binary-coded decimal (BCD). The current date can be calculated by performing a predetermined calculation on the 16-bit encoded data of MJD. The six 4-bit binary coded decimal numbers represent "time" in two decimal digits with two 4-bit binary coded decimal numbers, and the next two 4-bit binary coded decimal numbers have decimal code 2 The digit represents “minute” and the last two 4-bit binary coded decimal numbers represent “second” in two decimal digits.

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

The broadcast receiving apparatus 100 according to the present embodiment has a time management function based on NTP, which is time information expressed in UTC, and performs a decoding process and a display synchronization process for decoding video data, audio data, subtitles, text superimposition, and other presentation data that are contents of a broadcast signal. Can be used for more accurate synchronization processing. Further, by referring to the information in UTC not the clock notation of the broadcasting station, information such as video, audio, subtitles, superimposition, or other data, which is the content of the broadcasting signal received by the broadcasting signal, is acquired through the communication line route. It is also possible to perform decoding and display synchronization processing with video, audio, subtitles, superimposition, or other data.

Furthermore, the broadcast receiving apparatus according to the present embodiment presents the current time to the user with a time management function based on "JST_time" that includes 24-bit information represented by six 4-bit binary-coded decimal numbers of MH-TOT. It may be used for the processing or each processing for handling the MH-event information table (MH-EIT) described in FIG. 6B. Generally, in the process of presenting the current time to the user in the broadcast receiving device, accuracy of less than seconds is rarely required. Further, each time information described in the MH-event information table (MH-EIT) is represented by 6 4-bit binary-coded decimal numbers like the EIT of the conventional digital broadcasting transmitted by the MPEG2-TS system. The stored 24-bit information is stored in two decimal digits "hour", "minute", and "second". Therefore, the time management function based on MH-TOT in the broadcast receiving apparatus 100 of the present embodiment is easy to match the processing using MH-EIT. Specifically, the process using the MH-EIT includes a program guide generation process (described later), recording reservation and viewing reservation control, and copyright management processing such as temporary storage. This is because it is rare that any processing is required to have an accuracy of less than one second, and the accuracy of one second is sufficient.

In addition, the program guide generation process, the recording reservation and viewing reservation control, and the copyright management process such as temporary storage are functions that are also installed in a receiver of a conventional digital broadcasting system using the MPEG2-TS system. .. Then, also in the broadcasting system of the present embodiment, the conventional MPEG2-TS system digital broadcasting system is used in the processing such as program guide generation processing, recording reservation and viewing reservation control, and copyright management processing such as temporary storage. If it is configured to be compatible with time management processing having consistency, a broadcast receiving apparatus having both a conventional MPEG2-TS system digital broadcast receiving function and an MMT system digital broadcast receiving function is constructed. At this time, in these processes (processes such as program guide generation process, recording reservation/viewing reservation control, and copyright management process such as temporary storage), it is not necessary to separately design a processing algorithm, and the cost is reduced. can do.

Even if the receiver does not have the conventional MPEG2-TS system digital broadcast reception function but has only the MMT system digital broadcast reception function, program guide generation processing, recording reservation and viewing reservation control, Since it is possible to use the algorithm of the function installed in the receiver of the digital broadcasting system using the conventional MPEG2-TS method, it is possible to divert the algorithm of the processing such as the copyright management processing such as temporary storage without completely creating it. It can be developed at a lower cost.

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

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

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

[First Modification of Time Management]
Next, a first modified example of time management in the broadcasting system of this embodiment will be described below.

In the first modification, from the time management server (not shown) or the broadcast station server 300 to the broadcast receiving apparatus 100 in order to improve the accuracy of the management time of the time management function based on NTP already described using FIG. 7C. The broadcast receiving apparatus 100 is configured to transmit the information regarding the estimated delay time in the time information transmission described above in the broadcast signal and use the information regarding the estimated delay time for the correction of the system clock of the time management function based on NTP. Is also good.

At this time, the information regarding the assumed delay time may be transmitted not in the TLV-multiplexed stream shown in FIG. 3A but in the TMCC (Transmission and Multiplexing Configuration Control) area outside the TLV-multiplexed stream. good. By transmitting in the TMCC area, the broadcast receiving apparatus 100 can extract the information regarding the estimated delay time without passing through the TLV multiplexed stream separation processing (demux processing). That is, it is possible to obtain information that is not easily affected by the delay due to the separation processing in the broadcast receiving apparatus 100, and therefore it is possible to perform highly accurate correction processing of the system clock. An example of the data structure of the time information transmitted by the TMCC signal will be described with reference to FIG. 13C. The time information may be stored in the TMCC extended information area and transmitted, for example. In the time information in the TMCC extended information area of FIG. 13C, the “delta” parameter is an assumed value of transmission delay of 32 bits from the time management server that distributes the UTC or the server device that creates the TMCC signal to a general broadcast receiving device. Signed fixed point. The upper 16 bits describe the integer part, and the lower 16 bits describe the part after the decimal point. The “transmit_timestamp” parameter is a transmission time stamp, and describes the time when the present 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 part after the decimal point.

In the first modified example, the broadcast receiving device 100 of the present embodiment stores information about the estimated delay time described in the time information stored and transmitted in the TMCC extended information area (for example, the above-mentioned “delta”). The parameter and/or the “transmit_timestamp” parameter) can be used to more accurately correct 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.

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

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

However, in the above-mentioned "JST_time" parameter, since only the lower 16 bits of the MJD encoded data are used, overflow occurs due to "April 22, 2038", and the predetermined operation The date after "April 23, 2038" cannot be expressed only by itself. Therefore, in the second modified example of the present embodiment, the date after "April 23, 2038" is expressed by switching the calculation method depending on whether the value of MJD is equal to or more than a predetermined value or less than the predetermined value. It shall be controlled so that it can.

FIG. 12 shows an example of a first calculation method used when the value of MJD is equal to or larger than a predetermined value and a second calculation method used when the value of MJD is smaller 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 the MJD is less than “32768” is equivalent to the case where the most significant bit of the 16-bit data of the MJD is “0”. As a result, in the broadcast receiving apparatus 100 of the present embodiment, dates after "April 23, 2038" can be expressed. However, the predetermined value can be set arbitrarily, and the predetermined value may be set to "16384 (0x4000)", "49152 (0xC000)", or the like. The operation method switching condition may be that the upper 2 bits of the MJD 16-bit data are “00” and the upper 2 bits of the MJD 16-bit data are not “11”. When the above-mentioned means is used by setting the predetermined value to "32768", dates before "September 4, 1948" cannot be expressed, but there is no particular problem in practical use as a television receiver. ..

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

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

Therefore, 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 time data or the like is referred to in accordance with the value. It is possible to select which of the one calculation method and the second calculation method is used. That is, for example, if the most significant bit of the 64-bit length NTP length time data is "0", the second operation method is used, and if it is not "0", the first operation method is used. Yes, and so on.

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

[Broadcast receiver tuning process (initial scan)]
The AMT of the broadcasting system of the present embodiment provides a list of multicast groups of IP packets for receiving the IP packets transmitted by the TLV multiplexing method as distinctively as possible from the IP packets transmitted by the communication line. I shall. It is possible to list multiple IP multicast groups in one service identification. Also, an address mask can be used to efficiently describe consecutive IP addresses.

In the broadcast receiving apparatus 100 according to the present embodiment, the list of services acquired from the TLV-NIT is stored in the 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 changing the setting. Further, it is possible to store a list of IP multicast groups corresponding to each of the services as IP related information in association with each of the services in the non-volatile memory. 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, it is not necessary to re-acquire TLV-NIT or AMT when switching channels, etc. It becomes possible to do it.

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

When 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 then acquires TLV-NIT from the reception 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 the TLV stream ID and the original network ID from the acquired TLV-NIT. (S105). FIG. 15A shows an example of the data structure of TLV-NIT. The information of the TLV stream ID can be obtained from the “tlv_stream_id” parameter, and the information of the original network ID can be obtained from the “original_network_id” parameter. Further, distribution system information regarding the physical condition 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. 15B shows an example of the data structure of the satellite distribution system descriptor. FIG. 15C shows an example of the data structure of the service list descriptor. When the TLV-NIT has a plurality of different data such as the TLV stream ID, the original network ID, the distribution system information, the service ID list, and the like, the processes of S105 to S107 are repeated. Next, the reception function execution unit 1102 creates a service list based on the data such as the TLV stream ID, the original network ID, the distribution system information, the list of service IDs, etc. acquired in the processing of S105 to S107, and creates the service list. The service list is stored in the ROM 103, the storage unit 110, or the like (updated when rescanning) (S108).

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

In the process of S102, if the tuner/demodulation unit 131 has not succeeded in locking to the set frequency value (S102: No), and the TLV-NIT acquired in the process of S103 is not valid data. In the case (S104: No), the processes of S105 to S111 are 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 of the channel scan range (S112: Yes). On the other hand, if the set frequency value is not the final frequency value in the channel scan range (S112: No), the frequency value set in the tuner/demodulation unit 131 is increased (S113), and the processes of S102 to S111 are performed. repeat. If one TLV-NIT can acquire the service IDs of all the services that make up the broadcasting network and further can acquire the AMT having the list of IP multicast groups related to the service IDs, the steps S112 to S113 are performed. No processing is required.

Through the series of processes described above, the broadcast receiving apparatus 100 according to the present exemplary embodiment displays a list (service list) of services that configure the broadcast network at the time of channel scanning at the time of initial setting or at the time of rescanning for changing settings. At the same time as the creation/updating, it is possible to create/update the list of the IP multicast groups (IP related information) corresponding to each service, and further store it in the nonvolatile 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 one of the “version_number” parameters of TLV-NIT and AMT is detected, only the information regarding the table in which the change of 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 is automatically performed. Further, the user may be notified that the information in the table has changed, and the user may be allowed to select whether or not to perform the rescan.

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

When the user operates a remote controller or the like (not shown) to instruct to switch channels, the reception function execution unit 1102 interprets the command transmitted from the remote controller and specifies the service ID of the target service (S201). Next, the reception function execution unit 1102 starts acquisition of AMT from the reception signal of the tuner/demodulation unit 131. When the AMT is successfully acquired within the predetermined time (S202: Yes), the information about the list of IP multicast groups corresponding to the service ID is acquired from the acquired AMT (S204). On the other hand, when the AMT is not successfully acquired within the predetermined time (S202: No), by referring to the IP related information stored in the ROM 103 or the storage unit 110 (S203), the IP corresponding to the service ID is obtained. Information on the list of multicast groups is acquired (S204). The determination process of S202 may not be performed, and the IP related information stored in the ROM 103, the storage unit 110, or the like may be constantly referred to.

Next, the reception function execution unit 1102 starts acquisition of TLV-NIT from the reception signal of the tuner/demodulation unit 131. When the TLV-NIT is successfully acquired within the predetermined time (S205: Yes), distribution system information for acquiring the IP data flow corresponding to the service ID is acquired from the acquired TLV-NIT (S207). On the other hand, when the TLV-NIT is not successfully acquired within the predetermined time (S205: No), the service ID stored in the ROM 103 or the storage unit 110 is referred to (S206) to correspond to the service ID. Distribution system information for acquiring the IP data flow is acquired (S207). Note that the service list stored in the ROM 103, the storage unit 110, or the like may always be referred to without performing the determination process of S205. When the distribution system information is acquired in the process of S207, next, the reception function execution unit 1102 controls the tuner/demodulation unit 131 with the frequency value instructed by the acquired distribution system information, and the service ID (S208), the MMT data string is extracted from the received IP data flow, and is output to the separation unit 132.

In the separation unit 132, the transport processing unit 1102a acquires the MMTP packet having the packet ID “0” from the input MMT data string (S209), and further acquires the MPT included in the acquired MMTP packet. (S210). Next, the transport processing unit 1102a refers to the "MMT_package_id_byte" parameter included in 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 data structure of the MPT shown in FIG. 17, when the lower 16 bits of the “MMT_package_id_byte” parameter has the same value as the service ID (S211: Yes), the MMTP packet with the packet ID “0” is It is determined that the packet is an MMTP packet having program data corresponding to the service ID, and MFU is acquired based on the information of the acquired MPT (S216).

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 with the packet ID “0” has the MMTP having the program data corresponding to the service ID. Judge that it is not a packet. In this case, the transport processing unit 1102a newly acquires the PLT (S212), and confirms the acquired PLT to confirm the packet ID of the MMTP packet that transmits the MPT having the "MMT_package_id_byte" parameter corresponding to the service ID. Confirm (denoted as x) (S213). Further, the transport processing unit 1102a acquires the MMTP packet having the packet ID “x” from the input MMT data string (S214), and acquires the MPT included in the acquired MMTP packet (S215). Further, the MFU is acquired based on the information included in the acquired MPT (S216).

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

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

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

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

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

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

FIG. 19A is a default layout setting of the broadcast receiving apparatus 100 according to the present embodiment, and is an example in which only one area is set on the entire screen. FIG. 19B is an example in which the entire screen is divided into three areas, and each area is defined as “area 0”, “area 1”, and “area 2”. For example, when the number of pixels of the entire screen is horizontal 7680 pixels/vertical 4320 pixels, in the “region 0”, the “left_top_pos_x” parameter is “0”, the “left_top_pos_y” parameter is “0”, and the “right_down_pos_x” parameter is “80”. , And “right_down_pos_y” parameters are “80”, the range is set to (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. 19C is an example in which three areas are set similarly to FIG. 19B, but “area 0” is set in the range of (0, 0)−(7679, 4319), and “area 1” and “area "2" is placed in front of "area 0" according to the setting of the "layer_order" parameter in the same range as described above. In FIG. 19D, “area 0” is set in device 0 (default device: broadcast receiving apparatus 100 in this embodiment), and “area 1” is set in device 1 (portable information terminal 700 in this embodiment). This is an example of the case of being performed.

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

The fractional part after the decimal point generated when the screen is divided according to the setting value of the parameter such as “left_top_pos_x” may be rounded up or rounded down. Rounding (or rounding to zero in 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 the “region 0” is “0”, the “left_top_pos_y” parameter is “0”, the “right_down_pos_x” parameter is “51”, and the “right_down_down_pos”. If the parameter is "51", "region 0" may be set in the range of (0,0)-(3916,2203) by rounding up, or (0,0)-(3915, "Area 0" may be set in the range 2202). Further, in consideration of macroblocks at the time of video compression processing, rounding up/down processing may be performed in units of 8 pixels or 16 pixels. By the above processing, it becomes possible to efficiently perform area setting based on LCT and resolution conversion processing of multimedia contents in the area.

[Exceptional processing of screen layout control of broadcast receiving device]
In the broadcast receiving apparatus 100 of the present embodiment, even when the area control of the screen layout is performed by the above-mentioned LCT, when the user instructs the display of the EPG screen, the exceptional processing is performed. It is assumed that it is possible to perform screen layout control ignoring the description content of the LCT. FIG. 20A shows an example of an operation of an exceptional process of screen layout control based on LCT.

The screen layout control similar to that of FIG. 19B is performed by the description of LCT, the broadcast program video is displayed in “area 0”, and the broadcast of the program cooperation data or the like that cooperates with the broadcast program in “area 1” and “area 2”. When the user gives an instruction to display an EPG screen with a remote controller (not shown) while contents are being displayed, the broadcast receiving apparatus 100 of the present embodiment describes the LCT as shown in FIG. 20A(A). Regardless of the contents, the screen layout setting is returned to the default setting (that is, the same screen layout control as in FIG. 19A is performed), and the EPG screen is controlled to be displayed on the entire screen. Further, when the user gives an instruction to end the display 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 in a larger size than the case where the EPG screen is displayed while maintaining the area control of the screen layout as shown in FIG. It is possible to improve the visibility.

The exception process of the screen layout control is not applied only when the EPG screen is displayed. As shown in FIG. 20B, various setting screens of the broadcast receiving apparatus 100 (recording setting screen in the illustrated example) ) May be applied when the child screen is displayed or when the two screens are displayed.

In the case of the recording setting screen shown in FIG. 7A, the display area of the broadcast content is changed from the entire screen to only the child screen portion at the lower right of the screen. Similarly, in the case of the dual screen display shown in FIG. 7B, the display area of the broadcast content is changed from the entire screen to only the split screen portion on the left side of the middle stage of the screen. In either case, the display area for displaying the broadcast content is narrower than in the case where the entire screen is used, so that the area control of the screen layout is maintained within the display area (that is, the area division is performed). It is not visually preferable to go and leave multiple broadcast contents displayed simultaneously. Therefore, in the broadcast receiving apparatus 100 of the present embodiment, in the above situation, only the broadcast content of "area 0" is selected and displayed in the display area. It should be noted that the broadcast contents of "area 1" and "area 2" may be selected and displayed according to the immediately preceding area selection situation.

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

[EPG display of broadcast receiving device]
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. FIG. 21 shows an example of the data structure of the MH-EIT of this embodiment. The MH-EIT is identified into two classes by the table ID (corresponding to the "talbe_id" parameter in the figure), and indicates the current/next event information of the own TLV stream and the schedule information of each event of the own TLV stream. Shall be possible. The broadcast receiving apparatus 100 of the present embodiment refers to the MH-EIT or the like and performs identification by the service ID (corresponding to the “service_id” parameter in the figure) to thereby obtain information such as the start time and broadcast time of each event. It is assumed that it is possible to obtain the EPG screen and create the EPG screen, and the created EPG can be displayed on the monitor unit 162 by being superimposed on the video information or the like by the video synthesizing unit 161.

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

In the title area 162a2, a program title of the broadcast program and a symbol representing the attribute of the broadcast program are displayed. The symbol or the like indicating the attribute of the broadcast program is, for example, a symbol/character indicating that it is a new program or a symbol/character indicating that it is a rebroadcast program. Alternatively, it may be a mark or the like that symbolizes "data", which means that it corresponds to data broadcasting by a broadcasting service. Further, it may be a mark 162a4 or the like that symbolizes "NetWork", which means that it is possible to acquire contents, applications, etc. related to the broadcast program from the network. Further, by differentiating the background color of the detailed information 162a1 from others, or by enclosing the display area of the detailed information 162a1 with a thick frame, the symbols representing the attributes of the broadcast program may be replaced.

It should be noted that the control information (messages, tables, descriptors, etc.) in the broadcasting system of the present embodiment indicates that the contents and applications related to the broadcasting program can be acquired from the network. However, if the LAN communication unit 121 of the broadcast receiving apparatus 100 is not connected to a LAN cable or the like cannot access each server apparatus on the network, the mark 162a4 symbolizing "NetWork" is displayed. You may control not to display etc.

Further, in the case where the broadcast program is a distribution program distributed via the Internet 200 and cannot be acquired only from the broadcast wave, the broadcast receiving apparatus 100 is further connected to each server apparatus on the network as described above. When it is not possible to access, the control may be performed so that the detailed information 162b1 portion displayed on the EPG screen 162b is grayed out, as shown in FIG. 22B. That is, control is performed so that detailed information of a distribution program that cannot be viewed is not displayed. Further, by differentiating the background color of the detailed information 162b1 from others, the grayout processing may be replaced. When the detailed information 162b1 is selected by the operation of 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. The fact that it cannot be performed may be notified to the user by a popup or the like.

By the above-mentioned respective controls, the broadcast receiving apparatus 100 can provide the program information of each broadcast program in a format that is more comfortable for the user according to the network connection status.

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

As shown in the figure, when there is a channel having only distribution programs to be distributed via the Internet 200, normally, all channels (including information 162c1) are displayed as shown in the EPG screen 162c of FIG. Control to display the information. On the other hand, when the broadcast receiving apparatus 100 is in a state where it cannot access each server apparatus on the network, as shown in the EPG screen 162d of FIG. 7B, it has only a delivery program to be delivered via the Internet 200. The control may be performed so that the information of the "M2 broadcast (net broadcast)" channel (information 162c1 in FIG. 9A) is not displayed.

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

[Emergency warning broadcast display of broadcast receiver]
The broadcast receiving apparatus 100 according to the present embodiment performs the reception processing of the emergency alert broadcast 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 full-screen display application, or may be provided as text information in a text superimposition. When the emergency alert broadcast is provided in text superimposition as text information, it is preferable to display the text information of the text superimposition regardless of the state of the broadcast receiving apparatus 100 immediately before receiving the emergency alert broadcast. That is, as shown in FIG. 23, when the user watches a normal broadcast program and receives the emergency alert broadcast while the program screen 162e of the broadcast program is displayed on the monitor unit 162, the emergency alert broadcast is performed. The character information 162e1 is displayed so as to be superimposed on the program screen 162e. Similarly, when the user instructs to display the EPG screen and receives the emergency alert broadcast while the EPG screen 162f is displayed on the monitor unit 162, the character information 162f1 by the emergency alert broadcast is superimposed on the EPG screen 162f. Control to display.

By the control described above, in the broadcast receiving apparatus 100 of the present embodiment, even when the user selects and displays the EPG screen, various setting screens, recorded program list screen, Internet browser, etc., the emergency alert broadcast is performed. When it receives, it is possible to avoid missing important character information based on the emergency alert broadcast. Note that this control may be performed on character information of a normal character superimposing that does not depend on the emergency alert broadcast.

[Various exception handling]
The broadcast receiving apparatus 100 of the present embodiment may perform the following exceptional processing when the data outside the TLV stream in the same package cannot be acquired, for example.

As described with reference to FIG. 6E, in the broadcasting system to which the broadcast receiving apparatus 100 of the present embodiment corresponds, in the TLV stream based on the location information (corresponding to “MMT_general_location_info()” in FIG. 17) stored in the MPT. The data to be acquired and the data to be acquired by a route other than the TLV stream can be included in the same package. However, the data transmission path (for example, IPv4 data flow, IPv6 data flow, broadcast MPEG2-TS, etc.) other than the TLV stream indicated by the location information is a reception function different from the reception function of the TLV/MMT stream. Therefore, even when the broadcast receiving apparatus 100 is operating, a situation in which the receiving function of these transmission paths is not operating, a situation in which the receiving function itself is operating but the relay device or the like is not operating, and There may be situations in which data cannot be acquired from these transmission paths, such as a situation in which no wired or wireless connection is made to these transmission paths, or a situation in which the broadcast receiving apparatus 100 is installed in an environment in which these transmission paths cannot be connected in the first place. ..

Under such a situation, an event indicating that the location information stored in the MPT indicates that the data acquired in the TLV stream and the data acquired by the route other than the TLV stream are associated with each other so as to be included in the same package. When receiving, the broadcast receiving apparatus 100 of the present embodiment may perform the following operation, for example.

For example, as shown in FIGS. 19B and 19C, the LCT sets a plurality of areas on the screen, displays the video included in the TLV stream in “area 0”, and displays “area 1” and “area 2”. ] Is associated with data acquired through a transmission route other than the TLV stream so that the data of the transmission route other than the TLV stream to be displayed in the “region 1” or the “region 2” is displayed. If it cannot be acquired, layout display of a plurality of regions designated by the LCT may be prohibited. Specifically, even if the LCT is received, the image of the content received in the TLV stream is displayed in the “area 0” of the default layout display shown in FIG. 19A, and as shown in FIGS. 19B and 19C. It suffices not to shift to the layout display of multiple areas. Further, in this state, even if a change instruction from the default layout to the layout indicated by LCT is input to the operation input unit 170 of FIG. 7A, the default layout display shown in FIG. The display may be switched to the layout display of a plurality of areas as shown in FIGS. 19B and 19C by switching the display mode to.

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

Further, since the data of the transmission path other than the TLV stream to be displayed in the "area 1" or the "area 2" cannot be acquired, the content received in the TLV stream in the "area 0" of the default layout display shown in FIG. 19A. The operation of various communication functions and various reception functions of the broadcast receiving apparatus 100 of the present embodiment is started while the image of the above is displayed, the communication environment of various communication functions, the communication status and various reception functions. Due to changes in the receiving environment and the receiving situation, there may be a situation where the data of the transmission path other than the TLV stream to be displayed in the “area 1” or the “area 2” can be acquired. In this case, the broadcast receiving apparatus 100 of the present embodiment immediately switches from the default layout display shown in FIG. 19A to the layout of a plurality of areas as shown in FIG. 19B and FIG. 19C indicated by the LCT and sets the TLV to “area 0”. The video of the content received in the stream may be displayed, and the data acquired from the transmission path other than the TLV stream may be displayed in the “area 1” and the “area 2”. Alternatively, the layout change may be executed immediately after the instruction to change the layout 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.

[Copyright protection function]
In the digital broadcasting system supported by the broadcast receiving apparatus 100 of the present embodiment, by transmitting the copy control information in the MPT, for example, “unlimited copying is possible” (“unlimited copying is possible and storage is possible according to the copy control information. It may be divided into two types: "encryption processing is required at the time of output" and "unlimited copying is possible and encryption processing is not required at the time of storage and output"), "copying is possible only for one generation", "copying a predetermined number of times" ( For example, if it is possible to copy 9 times + move 1 time, so-called "dubbing 10"), "copy prohibited", or the like, the copy control state of the content referred to by the MPT may be indicated and transmitted. In this case, the broadcast receiving apparatus 100 according to the present embodiment stores the content in the storage (storage) unit 110, records it in a removable recording medium, outputs it to an external device, or outputs it to an external device according to the copy control information. It may be configured to control copying, move processing to an external device, and the like. Note that the target of the accumulation processing may include not only the storage (accumulation) unit 110 inside the broadcast receiving apparatus 100, but also the recording that has been subjected to the protection processing such as the encryption processing so that it can be reproduced only by the broadcast receiving apparatus 100. .. Specifically, the target of the accumulation process includes, among the external recording devices and the like, those that can be recorded and reproduced only by the broadcast receiving device 100.

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

First, when the copy control information included in the MPT indicates “unlimited copying is possible”, the broadcast receiving apparatus 100 according to the present embodiment stores in the storage unit 110, records on a removable recording medium, and external devices. Output to, external device copy, external device move processing without restriction. However, if "Unlimited copying is possible and encryption processing is required for storage and output" and "Unlimited copying is required and encryption processing is not required for storage and output" are separate, "Unlimited copying is possible, storage and output When "encryption process is required", storage in storage (storage) unit 110, recording on removable recording medium, output to external device, copy to external device, move process to external device is limited to the number of times. This can be done without any encryption, but both require encryption processing.

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

Further, when the copy control information included in the MPT indicates “permitted copying a predetermined number of times”, the broadcast receiving apparatus 100 according to the present embodiment can encrypt and store in the storage unit 110. When the stored content is output to an external device for viewing, it is encrypted and output together with the copy control information of “copy prohibited”. However, a predetermined number of copies and move processes to an external device may be possible. In the case of the so-called “dubbing 10”, the copying may be performed 9 times and the moving processing may be performed once to the external device.

Further, when the copy control information included in the MPT indicates “copy prohibition”, the broadcast receiving apparatus 100 of the present embodiment prohibits copying to the storage (accumulation) unit 110. However, the broadcast receiving apparatus 100 stores (accumulates) the storage unit 110 only for a predetermined time or a predetermined time specified by control information (for example, by the MH-Expire descriptor shown in FIG. 6D) included in the broadcast signal. In the case of being configured to have the “temporary storage” mode that enables the storage (storage) to the storage (storage) unit 110, even if the copy control information included in the MPT indicates “copy prohibited”. The content can be held temporarily. When the content whose copy control information included in the MPT is “copy prohibited” is output for viewing on an external device, it is encrypted and output together with the copy control information “copy prohibited”.

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

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

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

Similarly, once the copy control information indicates that the content has a copy restriction such as "copy only for one generation", "copy for a predetermined number of times", "copy unlimited and encryption required for storage and output". Also in the process of moving to the external device via the LAN communication unit 121 after storing in the storage (storage) unit 110, the IP address of the external device which is the destination of the packet transmitted from the broadcast receiving device 100 is the broadcast receiving device 100. If the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving apparatus 100, it may be prohibited.

As a general rule, for viewing video output and audio output of the content stored in the storage (storage) unit 110 of the broadcast receiving apparatus 100, the IP address of the external device, which is the destination of the packet transmitted from the broadcast receiving apparatus 100, is broadcast received. This is possible only when the IP address of the apparatus 100 is in 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, the external device is connected within the same subnet as the IP address of the broadcast receiving apparatus 100 within a predetermined period, and is registered as a device that can be viewed even outside the same subnet as the IP address of the broadcast receiving apparatus 100. In the case of (paired) devices, even if the IP address of the external device is outside the same subnet as the IP address of the broadcast receiving device 100, the storage (accumulation) of the broadcast receiving device 100 in the external device is performed. The contents stored in the unit 110 may be output for viewing video and audio. In this case, the video output for viewing and the audio output are performed by encrypting the content.

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

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

First, when the MPT includes copy control information, the data included in the same package and the same event in the location information is different from the data acquired in the TLV stream of the broadcast route (IPv4, IPv6, MPEG2-TS, URL, etc.). Even if it is the data acquired in step (4), it may be controlled according to the copy control information included in the TLV stream. As described above, the copy control status of the content specified by these copy control information is "unlimited copy allowed" ("unlimited copy allowed and encryption processing required for storage and output" and "unlimited copy allowed". Also, it may be divided into two types, "no encryption processing is required at the time of storage and output", "only one generation can be copied", "a predetermined number of times can be copied" (for example, 9 times copy + 1 move is so-called "so-called" Dubbing 10"), "copy prohibited", etc. can be specified.

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

In the digital broadcast 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 the MPT includes copy control information and the data included in the same package and the same event in the location information includes the data of MPEG2-TS transmitted by another digital broadcast signal, the MPEG2- The copy control state indicated by the copy control information included in the TLV stream is preferentially controlled over the copy control state indicated by the copy control information included in TS.

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

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

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

In the case of this operation, regarding the data acquired through the route other than the TLV stream, the original copy control information set in the broadcasting system transmitting the data is respected while the copy is performed on the broadcast receiving apparatus 100 of the present embodiment. Duplication of 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, the copy control may be performed as the content in the copy control state indicated by the copy control information included in the TLV stream.

In the case of this operation, regarding the data acquired through the route other than the TLV stream, the original copy control information set in the broadcasting system transmitting the data is respected while the copy is performed on the broadcast receiving apparatus 100 of the present embodiment. Duplication of 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 in which the copy control information is arranged is not limited to MPT. In addition to the MPT, the MH-service description table (MH-SDT) and MH-event information table (MH-EIT) described in FIG. 6B are arranged and transmitted, and the broadcast receiving apparatus 100 follows them. You may perform copyright protection processing.

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

The second embodiment of the present invention will be described below. 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, in the following, differences between the present embodiment and the first embodiment will be mainly described, and common points will be omitted as much as possible to avoid duplication. Further, the broadcast receiving apparatus of the present embodiment will be described below as a television receiver compatible with both the MMT system and the MPEG2-TS system as the media transport system.

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

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, The main control unit 101, the system bus 102, the ROM 103, the RAM 104, the storage (accumulation) unit 110, the expansion interface unit 124, the digital interface unit 125, the monitor unit 162, and the video output unit 163 in the broadcast receiving apparatus 100 according to the first embodiment. , The speaker unit 165, the voice output unit 166, the operation input unit 170, and the like, and have the same functions, and detailed description thereof will be omitted.

The first tuner/demodulation unit 831 receives a broadcast wave of a broadcasting service adopting MMT as a media transport system via an antenna (not shown), and a service desired by the user based on the control of the main control unit 801. Tune in to the channel of. Further, the first tuner/demodulation unit 831 demodulates the received broadcast signal to acquire an MMT data string, and outputs it to the MMT decoding processing unit 841. The second tuner/demodulation unit 832 receives a broadcast wave of a broadcasting service adopting MPEG2-TS as a media transport system via an antenna (not shown), and controls the main control unit 801 to request the user. Tune to the channel of the service you want to select. 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 decoding processing unit 842.

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

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

The video synthesizing unit 861 inputs the video information, subtitle information, and application information output from the MMT decoding processing unit 841, and the video information, subtitle information, and application information output from the MPEG2-TS decoding processing unit 842, Processing such as appropriate selection and/or superposition is performed. The video composition unit 861 includes a video RAM (not shown), and the monitor unit 862 and the like are driven based on the video information and the like input to the video RAM. In addition, the video synthesizing unit 861 performs scaling processing, EPG screen information superimposing processing, and the like, as needed, under the control of the main control unit 801. The audio synthesis unit 164 inputs the audio information output from the MMT decoding processing unit 841 and the audio information output from the MPEG2-TS decoding processing unit 842, and appropriately performs selection and/or mixing processing.

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 on the Internet 200 or other communication devices. Further, the MMT data sequence (or a part thereof) or the MPEG2-TS data sequence (or a part thereof) of the program transmitted via the communication line is acquired, and the MMT decoding processing unit 841 and the MPEG2-TS are appropriately acquired. It is output to the decoding processing unit 842.

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

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

However, since there are differences in the encoding process/decoding process, the transmission route, etc. between the broadcasting service that uses MMT as the media transport system and the broadcasting service that uses MPEG2-TS as the media transport system, the current time display In the above, there is a possibility that inconsistency may occur at the time of selecting a broadcast service adopting MMT as a media transport method and at the time of selecting a broadcast service adopting MPEG2-TS as a media transport method. For example, as shown in FIG. 25, an EPG screen 162g displaying channel information of a broadcasting service adopting MMT as a media transport system, an EPG displaying channel information of a broadcasting service adopting MPEG2-TS as a media transport system from an EPG screen 162g. When the screen display is switched to the screen 162h, there is a possibility that the user may feel a sense of visual discomfort due to the inconsistency caused by switching the display of the current time from the current time display 162g1 to the current time display 162h1.

In the broadcast receiving apparatus 800 of the present embodiment, even in the case where the video synthesizing unit 861 mainly selects the video information and the like output from the MMT decoding processing unit 841 in order to prevent the user's visual discomfort. , And controls to superimpose the information about the current date and the current time acquired from the TOT on the video information and the like. That is, the 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 the 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 the broadcasting service that uses MMT as the media transport method and the broadcasting service that uses MPEG2-TS as the media transport method, the user feels a visual discomfort due to the mismatch of the display of the current time. It is possible to prevent this.

It should be noted that FIG. 26A shows an example of the 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, the current time information is always referred to by referring to the TOT when the broadcast service adopting the MPEG2-TS as the media transport system can be received. The MH-TOT is available only when the broadcast service adopting the MPEG2-TS as the media transport method cannot be received and the broadcast service adopting the MMT as the media transport method can be received. Control is performed by referring to to obtain the current time information.

Also, 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 the MPEG2-TS as the media transport method. Even if controlled, the same effect as described above can be obtained.

In addition, as described above, when control is performed so that the current time information provided by the broadcast service that employs MPEG2-TS as the media transport method is superimposed on the content of the broadcast service that uses the MMT as the media transport method. And a case where control is performed so that the current time information provided by the broadcast service that uses MMT as the media transport method is superimposed on the content of the broadcast service that uses MPEG2-TS as the media transport method. In the same manner, the current time information can be corrected by referring to the "delta" parameter of the time information in the TMCC extended information area, as in the case of [Time management of broadcast receiving device] in the first embodiment. It is possible.

In addition, in both cases of the broadcasting service that uses MMT as the media transport method and the broadcasting service that uses MPEG2-TS as the media transport method, the MH-TOT or TOT transmitted by each broadcasting service that constitutes the network is It is conceivable that there is an error due to a malfunction of the transmission side system or a transmission error. In the broadcast receiving apparatus 800 of the present embodiment, as a countermeasure against the error of the MH-TOT or TOT, when it is determined that the MH-TOT or TOT acquired from the service being received has an error, the other network Which has a function to update the time information of the built-in clock by acquiring MH-TOT or TOT from other broadcasting services of other networks or referring to the current time information. And

FIG. 26B shows an example of the update processing of the current time information when receiving the broadcast service adopting MPEG2-TS as the media transport method in the broadcast receiving apparatus 800 of the present embodiment. It should be noted that even when a broadcast service that uses MMT as the media transport method is being received, the same processing as the processing shown in FIG.

When updating the time information of the built-in clock in the broadcast receiving apparatus 800 of the present embodiment, first, the receiving function executing unit 1102 receives MPEG2 of the broadcasting service currently being received (broadcasting service adopting MPEG2-TS as a media transport system). -Obtain the TOT from the TS data string (S301), and further obtain the current time information by referring to the obtained 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 with the current time information acquired in the process of S302 (S306). On the other hand, as a result of the comparison process, when the difference between the current time information acquired in S302 and the time information of the internal clock is not within a predetermined value (S303: No), or the TOT acquired in S301 is included in the data. When the reception function execution unit 1102 has a flag 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 an arbitrary TOT of another network. MH-TOT is acquired from the MMT data string of the broadcasting service (broadcasting service adopting MMT as a 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 with the current time information acquired in the process of S305.

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

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

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

However, the broadcast receiving apparatus 800 of the present embodiment is displaying the video information or the like provided by the broadcasting service adopting MMT as the media transport system, or the MPEG2-TS as the media transport system. It is possible to obtain both the MH-EIT and the EIT even while displaying the video information and the like provided by the broadcasting service adopting the above, and the usability for the user is improved.

FIG. 27A shows an example of the EPG screen in the broadcast receiving device 800 of this embodiment. In the figure, an EPG screen 162i is an EPG screen created based on MH-EIT, which is a broadcasting service that employs MMT as a media transport system, and includes "M1 TV", "M2 broadcast", "M3 channel", and "M4TV". , “TV M5” and the like are the names of broadcasting stations of broadcasting services that adopt MMT as a media transport system. The EPG screen 162j is an EPG screen created based on the EIT of a broadcasting service that employs MPEG2-TS as a media transport system, and is "T6 TV", "T7 broadcast", "T8 channel", "T9TV". , "TV TA" and the like are broadcasting station names of broadcasting 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 watching a broadcast program provided by a broadcasting service that employs MMT as a media transport system, an initial screen of the EPG screen (illustrated Is omitted) is displayed. The initial screen of the EPG screen is an EPG screen created based on MH-EIT, which is a broadcasting service that employs MMT as a media transport system, and is from “17:00 to October 7, 2014 (today)”. Detailed information of the broadcast program of each channel of "(near current time)" is displayed. Next, the user desires to confirm the detailed information of the broadcast program of each channel of "October 9th, 2014" from "20:00", 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 the detailed information of the broadcast program provided by the broadcast service that employs MPEG2-TS as the media transport method, and operates the remote controller (not shown) to instruct the switching of the network, the EPG The screen 162j is displayed. At this time, in the broadcast receiving apparatus 800 of the present embodiment, the initial screen of the EPG screen created based on the EIT of the broadcasting service that employs MPEG2-TS as the media transport system (that is, “October 7, 2014”). ”Of “17:00-” of the broadcast program of each channel), not the EPG screen 162i displayed immediately before the same time period (ie, “October 9th, 2014”, “20:00-”). )) Control to display detailed information of the broadcast program of each channel.

By the control described above, the user can continuously check detailed information on broadcast programs in the same time zone on the same day in a plurality of networks with different media transport systems by a simple operation. That is, the usability of the broadcast receiving device 800 is improved.

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

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

The third embodiment of the present invention will be described below. Note that the configuration, effects, and the like in this embodiment are the same as those in the first embodiment unless otherwise specified. For this reason, in the following, differences between the present embodiment and the first embodiment will be mainly described, and common points will be omitted as much as possible to avoid duplication.

It is assumed that the broadcast receiving apparatus 100 of the present embodiment is compatible with HDR (High Dynamic Range), which is a technology for expanding the luminance width of colors of video contents, and expansion of the color gamut. In addition, in the MMT that is the media transport method supported by the broadcast receiving apparatus 100 of the present embodiment, video reproduction as intended by the content creator can be performed on the monitor device used by the user (the broadcast receiving apparatus 100 or the like in the present embodiment). In order to make it possible, it is assumed that the content information relating to the HDR and the color gamut expansion can be transmitted together with the encoded data of the program content.

[System configuration]
The system configuration in this embodiment is basically the same as the system configuration shown in FIG. As the encoded data of the program content included in the broadcast wave transmitted from the radio tower 300t, as shown in FIG. 28, the content data output from the imaging device 390c is temporarily stored in the broadcast station server 300. Instead of performing the processing, the encoding processing and the modulation processing may be appropriately performed and transmitted. Alternatively, the content data output from the photographing device 390c is stored in the broadcasting station server 300, and the stored content data is subjected to various video/audio editing processing by the editing device 390e and further encoded. It may be one that has been appropriately processed and modulated, and then transmitted.

Further, the broadcast wave includes encoded data of program contents, character information, other applications, general-purpose data, and the like, as well as luminance information of the program contents and a device used when creating/editing the program contents ( A content information descriptor that describes information about color reproduction performance of the photographing device 390c, the editing device 390e, etc.) is used as the control information (content information) about the program content, and each message of the above-mentioned MMT-SI. It shall be sent with the table/descriptor.

[Data structure of content information descriptor]
FIG. 29A shows an example of the data structure of the content information descriptor. The content information descriptor may be placed in MPT or MH-EIT. Each parameter in the data structure of the content information descriptor has a function described below.

・"Descriptor_tag (descriptor tag)"
The descriptor tag has a function of uniquely identifying each descriptor with a 16-bit field.

・"Descriptor_length (descriptor length)"
The descriptor length shall indicate the total number of data bytes of each parameter following this field.

・"Component_tag (component tag)"
The component tag is a label for uniquely identifying the component stream, and is described in a 16-bit field. It has the same value as the component tag described in the MH-stream identification descriptor.

・"Content_type (content type)"
The content type represents the type of video content included in the component stream according to FIG. 29B. When this parameter is “0”, it means that the video content is one that has been edited and edited by the editing device 390e (recorded program etc.). If this parameter is "1", it means that the video content is one that has been edited and edited by the editing device 390e (recorded program etc.) and that this content is compatible with HDR. To do. When this parameter is “2”, it means that the video content is content data (live broadcast program etc.) output from the photographing device 390c. If this parameter is “3”, it means that the video content is content data (a live broadcast program, etc.) output from the photographing device 390c, and that this content is compatible with HDR. Furthermore, other classification may be performed using this parameter.

・"Source_primaries_rx (source device primary color chromaticity coordinates (Rx))"
"Source_primaries_ry (source device primary color chromaticity coordinates (Ry))"
"Source_primaries_gx (source device primary color chromaticity coordinates (Gx))"
"Source_primaries_gy (source device primary color chromaticity coordinates (Gy))"
"Source_primaries_bx (source device primary color chromaticity coordinates (Bx))"
"Source_primaries_by (source device primary color chromaticity coordinates (By))"

The source device primary color chromaticity coordinates are parameters indicating information regarding color reproduction performance of the source device, and the color gamut that the source device can support is R (red)/G (green)/B (blue) primary colors. The coordinate values on the CIE chromaticity diagram (CIExy chromaticity diagram) of FIG. The source device is a monitor device of the editing device 390e when the "content_type" parameter is "0" or "1". In this case, the source device primary color chromaticity coordinates represent the chromaticity coordinate values of the color gamut that can be displayed on the monitor device of the editing device 390e. When the “content_type” parameter is “2” or “3”, the source device is the image capturing device 390c. In this case, the source device primary color chromaticity coordinates represent the chromaticity coordinate values of the color gamut that can be output by the photographing device 390c.

Each coordinate value on the CIE chromaticity diagram is represented by a value in the range of "0.000" to "1.000", and is described in the range of "0000000000b" to "1111101000b" in a 10-bit field. Shall be done. For example, as shown in FIG. 29C, BT. If the chromaticity coordinate value of R (red) in the 709 standard is “x=0.640 (1010000000b)” and “y=0.330 (0101001010b)”, BT. For G (green) chromaticity coordinate values in the 2020 standard, “x=0.170 (0010101010b)” and “y=0.977 (1100011101b)” are obtained.

-"Source_white_point_x (source device white chromaticity coordinates (x))"
"Source_white_point_y (source device white chromaticity coordinate (y))"
The source device white chromaticity coordinate is a parameter indicating information regarding the color reproduction performance of the source device, and shall indicate the coordinate value on the CIE chromaticity diagram of the white reference point that the source device can support. The source device is a monitor device of the editing device 390e when the “content_type” parameter is “0” or “1”. In this case, the source device white chromaticity coordinate indicates the chromaticity coordinate value of the white reference point of the monitor device of the editing device 390e. When the “content_type” parameter is “2” or “3”, the source device is the photographing device 390c. In this case, the source device white chromaticity coordinate indicates the chromaticity coordinate value of the white reference point that can be output by the photographing device 390c.

Each coordinate value on the CIE chromaticity diagram is shown as a value in the range of "0.0000" to "1.0000", and is described in the range of "0000000000000000b" to "10011100010000b" in a 14-bit field. Shall be done. For example, as shown in FIG. 29C, BT. 709 standard and BT. In the case of the chromaticity coordinate value of the white reference point in the 2020 standard, “x=0.3127 (001100000110111b)” and “y=0.3290 (00110011011010b)”.

・"Source_luminance_max (source device maximum brightness)"
"Source_luminance_min (source device minimum brightness)"
The maximum brightness of the source device and the minimum brightness of the source device are parameters indicating information about the maximum brightness and the minimum brightness that the source device can support. The source device is a monitor device of the editing device 390e when the “content_type” parameter is “0” or “1”. In this case, the maximum brightness of the source device and the minimum brightness of the source device indicate the maximum value and the minimum value of the brightness that can be displayed on the monitor device of the editing device 390e. When the “content_type” parameter is “2” or “3”, the source device is the photographing device 390c. In this case, the maximum luminance of the source device and the minimum luminance of the source device indicate the maximum value and the minimum value of the luminance that the photographing device 390c can output.

Source device maximum brightness, "1 (cd / m ^2: candela / square meter)" - "65535 (cd / m ^2)" shall be indicated by a value in the range of a 16-bit field "0000h" - "FFFFh ] Shall be described in the range. The minimum luminance of the source device shall be indicated by a value in the range of "0.0001 (cd/m ² )" to "6.5535 (cd/m ² )", and in a 16-bit field, "0000h" to "FFFFh. ] Shall be described in the range.

・"Num_of_scene (number of scenes)"
The number of scenes indicates the number of scenes (which may be referred to as chapters or the like) forming the video content included in the component stream. When the number of scenes is "1", description of this parameter may be omitted.

・"Scene_start_time (scene start time)"
The scene start time indicates the start time of the scene (chapter) in a 40-bit field. The upper 16 bits of this field indicate the lower 16 bits of the modified Julian day (MJD), and the lower 24 bits indicate the hour, minute, second of Japan Standard Time (JST) by a 6-digit BCD code. When the number of scenes is "1", description of this parameter may be omitted.

・“Scene_duration”
The scene duration is a 24-bit field indicating the duration of the scene (chapter). This field indicates the hour, minute, and second of the duration in a 6-digit BCD code. When the number of scenes is "1", description of this parameter may be omitted.

-"Max_light_level_of_content (content maximum brightness)"
The maximum content brightness indicates the maximum brightness in each scene (chapter) in a 16-bit field. When the number of scenes is "1", this parameter indicates the maximum value of brightness throughout the entire content. The maximum content brightness is indicated by a value in the range of "1 (cd/m ² )" to "65535 (cd/m ² )", and is described in the range of "0000h" to "FFFFh" in a 16-bit field. Shall be done.

-"Max_frame_ave_light_level (maximum frame average brightness)"
The maximum frame average brightness indicates the maximum value of the frame average brightness in each scene (chapter) in a 16-bit field. When the number of scenes is "1", this parameter indicates the maximum value of the average frame brightness over the entire content. The maximum frame average brightness shall be indicated by a value in the range of “1 (cd/m ² )” to “65535 (cd/m ² )”, and in the range of “0000h” to “FFFFh” in a 16-bit field. It shall be described.

-"Max_light_level_of_frame (maximum brightness in frame)"
The maximum brightness within a frame indicates the maximum brightness within each frame in a 16-bit field. The maximum luminance within a frame is represented by a value in the range of “1 (cd/m ² )” to “65535 (cd/m ² )”, and in the range of “0000h” to “FFFFh” in a 16-bit field. It shall be described.

-"Frame_average_light_level (average luminance in frame)"
The average brightness within a frame indicates the average brightness of each frame in a 16-bit field. The average luminance within a frame is represented by a value in the range of “1 (cd/m ² )” to “65535 (cd/m ² )”, and in the range of “0000h” to “FFFFh” in a 16-bit field. It shall be described.

・"EOTF_identification (EOTF identification)"
EOTF (Electro-Optical Transfer Function) identification is to identify the type of conversion characteristics (transfer characteristics) between an electric signal and an optical signal such as gamma correction applied to a video signal of video content included in a component stream. .. For example, in the example shown in FIG. 29D, when this parameter is “0”, the video content is BT. It is shown that gamma correction suitable for a monitor device having a display characteristic conforming to 709 is applied. If this parameter is “2”, the video content is BT. This indicates that gamma correction of 10-bit processing suitable for a monitor device having 2020-compliant display characteristics has been performed. If this parameter is “3”, the video content is BT. It is shown that gamma correction of 12-bit processing suitable for a monitor device having 2020-compliant display characteristics is performed. If this parameter is "4", it indicates that the video content has been subjected to gamma correction suitable for a monitor device having SMPTE2084-compliant display characteristics. Furthermore, other classification may be performed using this parameter. The "EOTF identification" parameter may be capable of identifying the type of colorimetry. It should be noted that the types of conversion characteristics (transfer characteristics) of electric signals and optical signals shown in FIG. 29D are examples, and video signals of video contents are processed for conversion characteristics (transfer characteristics) of other electric signals and optical signals. The characteristic may be identified by the "EOTF identification" parameter.

Here, the broadcast receiving apparatus 100 that has received the video content and the “EOTF identification” parameter refers to the “EOTF identification” parameter associated with the video content, and further displays the display characteristics of the monitor device that displays the video content. By performing appropriate processing such as electro-optical conversion based on the above, it becomes possible to display each of the video contents in a state suitable for the monitor device. For example, when the transfer characteristic identified by the “EOTF identification” parameter associated with the video content corresponds to the display characteristic of the monitor device that displays the video content, the “EOTF identification” parameter is used in the display process. The electrical-optical conversion identified by can be performed as it is. If the transfer characteristic identified by the “EOTF identification” parameter associated with the video content does not correspond to the display characteristic of the monitor device that displays the video content, the transfer characteristic is identified by the “EOTF identification” parameter. The electro-optical conversion is not performed as it is, but the video signal obtained by converting the electric signal and the optical signal according to the identification of the “EOTF identification” parameter is subjected to the electro-optical conversion corresponding to the display characteristics of the monitor device. After the conversion processing for converting into a video signal suitable for the above processing is performed, the display processing for performing the electro-optical conversion corresponding to the display characteristics of the monitor device may be performed.

The above-mentioned video signal, which has been subjected to the conversion processing between the electric signal and the optical signal according to the identification of the "EOTF identification" parameter, is converted into the video signal suitable for the processing of the electro-optical conversion corresponding to the display characteristic of the monitor device. The conversion process for conversion will be described below. In the following, the above process will be referred to as a transfer characteristic conversion process.

The video content having the values “2”, “3”, and “4” in the “EOTF identification” parameter is HDR video content having a wide range of light and dark that can be expressed and a wide color gamut. On the other hand, the video content having a value of “0” in the “EOTF identification” parameter is an SDR (Standard Dynamic Range) video content in which the range of light and dark that can be expressed is narrower than the HDR video content.

In addition, BT. A display device having a display characteristic conforming to 2020 and a display device having a display characteristic conforming to SMPTE2084 can be referred to as an HDR compatible display device. On the other hand, BT. A display device having a display characteristic conforming to 709 can be referred to as an SDR compatible display device. Furthermore, BT. 709, a display device having display characteristics according to BT.709. A display device that does not support HDR display characteristics such as 2020 or SMPTE 2084 may be referred to as an SDR-compatible display device (non-HDR compatible display device) as a subordinate concept of the SDR-compatible display device.

Here, the HDR video content is referred to as BT. When displaying on an SDR-compatible display device (non-HDR-compatible display device) such as a monitor device having a display characteristic conforming to 709, if the transfer characteristic conversion process is not performed, a wide light-dark range or color gamut of the HDR video content is obtained. And the like cannot be fully displayed on the monitor device, resulting in a display image having a crushed luminance and a crushed color. That is, in this case, in the transfer characteristic conversion process, a process of converting a wide light-dark range, a color gamut, or the like of the HDR video content into a light-dark range, a color gamut, or the like expressible by the monitor device is performed. I'm fine. The processing may be expressed as light-dark dynamic range reduction conversion or gamut reduction conversion. Further, since it is a process for converting HDR video content having a wide range of expressible brightness and color gamut into SDR video content having a narrow range of expressible light and dark range and color gamut, it is referred to as HDR-SDR conversion processing. Is also good.

On the other hand, the video content having a value of “0” in the “EOTF identification” parameter is an SDR video content having a narrow expressible light-dark range, a color gamut, and the like. If the SDR video content is BT. When displaying on an HDR-compatible display device such as a monitor device having a display property conforming to 2020, if the transfer characteristic conversion process is not performed, the wide bright-dark display performance, the color gamut display performance, and the like of the monitor device can be fully utilized. I can't. That is, in this case, in the transfer characteristic conversion process, the conversion process may be performed on the SDR video content so that the wide light-dark display performance, the color gamut display performance, and the like of the monitor device can be fully utilized. The processing may be expressed as bright and dark dynamic range expansion conversion and color gamut expansion conversion. Further, since it is a process of converting SDR video content having a narrow expressible light/dark range, color gamut, etc. into HDR video content having a wide expressible light/dark range, color gamut etc., it is referred to as an SDR-HDR conversion process. Is also good. It should be noted that the SDR-HDR conversion process is not always necessary, and the SDR video content is set to BT. The SDR-HDR conversion process may not be performed when displaying on an HDR-compatible display device such as a monitor device having 2020-compliant display characteristics. In this case, the bright and dark display performance and the color gamut display performance remain within the range of the display characteristics of the SDR, but there is no problem because the display image does not have a crushed luminance or a crushed color and is difficult to see.

It should be noted that if the “EOTF identification” parameter is not associated with the video content received by the broadcast receiving apparatus 100 and cannot be obtained (when it is not originally transmitted), or if the “EOTF identification” parameter is associated with the video content received by the broadcast receiving apparatus 100. The following processing may be performed as an example of the processing in the case where the value of the “EOTF identification” parameter cannot be obtained and cannot be determined due to a transmission error or the like.

As a first processing example, the value of the “EOTF identification” parameter of the received video content may be treated as being “2” or “3”, for example. That is, when the value of the “EOTF identification” parameter cannot be identified, the video content may be treated as HDR video content. With this configuration, the monitor device can display the BT. An HDR-compatible display device such as a monitor device having a display property conforming to 2020 does not perform the transfer characteristic conversion process, but if the actual content is an HDR video content, an appropriate display is made, and the actual content is an SDR video content. Even so, the bright and dark display performance and the color gamut display performance remain within the range of the display characteristics of the SDR, but the display image does not become difficult to see with the brightness collapse and the color collapse. Further, the monitor device is BT. In the case of an SDR compliant display device (non-HDR compliant display device) such as a monitor device having a display characteristic conforming to 709, the transfer characteristic conversion process is performed by handling the video content as HDR video content. If the content is HDR video content, it is appropriately subjected to HDR-SDR conversion processing and displayed, and even if the actual content is SDR video content, the light/dark display performance and the color gamut display performance are better than the display characteristic range of SDR. Although it will be further limited, it is possible to prevent the display image from being difficult to see with a brightness collapse or a color collapse that cannot at least express the bright and dark range or color gamut of the video content. (When the SDR-HDR conversion process is performed when the actual content is the HDR video content, or when the actual content is the HDR video content, the HDR-SDR conversion is performed on the SDR compatible display device (the HDR non-compatible display device). In the case of displaying it as it is without performing it, there is a possibility that such an unreadable display image with a crushed brightness and a crushed color may be displayed, but this situation can be avoided in the first processing example.)

According to the first processing example described above, if the value of the “EOTF identification” parameter cannot be identified, the video content is treated as the HDR video content, so that the monitor device is an HDR compatible display device. Whether the display device is an SDR-compatible display device (non-HDR-compatible display device) or the actual content is an HDR video content or an SDR video content, it is possible to display a video with few problems for the user.

Also, as another second processing example of the processing when the value of the “EOTF identification” parameter cannot be acquired (including the case where it is not transmitted, the case of a transmission error, etc., the case of an invalid value), the video component descriptor It is also possible to decide whether to handle the video signal as HDR video content or SDR video content by referring to the parameter regarding the resolution of the video signal included in the above.

For example, even if the value of the “EOTF identification” parameter cannot be identified, the parameter relating to the resolution of the video signal is that the resolution of the video content is high resolution content such as 3840×2160 pixels or 7680×4320 pixels. In the case where it is shown, it may be determined that it is HDR video content. Specifically, it may be interpreted that the value of the “EOTF identification” parameter is “2” or “3”. It is expected that high-resolution contents of 3840×2160 pixels or 7680×4320 pixels will be prepared as HDR video contents in the future in many cases, and thus such processing facilitates stochastically appropriate display.

Even if the value of the “EOTF identification” parameter cannot be identified, if the parameter related to the resolution of the video signal indicates that the resolution of the video content is 1920×1080 pixels or less, the SDR video is displayed. You may judge that it is content. Specifically, it may be interpreted that the value of the "EOTF identification" parameter is "0". Since many existing SDR contents exist for contents having a resolution of 1920×1080 pixels or less, such processing facilitates stochastic appropriate display.

According to the second processing example described above, when the value of the “EOTF identification” parameter cannot be identified, the display is probabilistically appropriate by making a determination by referring to the parameter related to the resolution.

Next, processing will be described when the value of the “EOTF identification” parameter associated with the video content received by the broadcast receiving apparatus 100 is a value for which the relationship with the display characteristic is not prepared in the table of FIG. 29D. Here, in the table of FIG. 29D, a value that does not have a relationship with the display characteristics means that the value of the “EOTF identification” parameter in the table of FIG. 29D will be “1” or “5” to “15” in the future. This is the case when the reserved value for or for an unexpected value is stored. These values may be expressed as invalid values. Even in the case of such an invalid value (a value for which a relationship with the display characteristic is not prepared), the same effect can be obtained by performing either the first processing example or the second processing example described above. Is obtained.

In the configuration diagram of FIG. 7A, the video color gamut conversion unit 142 controlled by the control of the main control unit 101 based on the data separated by the separation unit 132 performs the various video processing according to the “EOTF identification” parameter described above. I'm fine.

Here, when the video content to be displayed is switched between the HDR video content and the SDR video content due to a program change or channel switching, the timing at which the decoded video from the video decoder 141 in FIG. 7A is switched between the HDR video content and the SDR video content. Ideally, the timing at which the video processing of the video color gamut conversion unit 142 switches between processing for HDR video content and processing for SDR video content is ideal. However, in reality, it is conceivable that a timing deviation will occur.

In the HDR compatible display device that performs the SDR-HDR conversion process on the SDR video content, when the HDR video content is switched to the SDR video content, the timing of the video processing of the video color gamut conversion unit 142 is switched from the video decoder 141. If it becomes earlier than the switching timing of the decoded video, it takes time to perform the SDR-HDR conversion process on the HDR video content, and there is a possibility that an unreadable display video with crushed brightness and crushed color may be displayed. .. Therefore, when the HDR video content is switched to the SDR video content, the main control unit 101 sets the switching timing of the video processing of the video color gamut conversion unit 142 to be later than the switching timing of the decoded video from the video decoder 141. The processing timing of the video decoder 141 and the video color gamut conversion unit 142 may be controlled. Alternatively, the video may be controlled to be in a video mute state such as black display before the switching of the both starts processing, and the video mute state such as a black display of the video may be released after the switching between the both is completed. ..

Further, in the HDR compatible display device that performs the SDR-HDR conversion process on the SDR video content, when the SDR video content is switched to the HDR video content, the timing of switching the video processing of the video color gamut conversion unit 142 is the video decoder 141. If it is later than the switching timing of the decoded video from, the time for performing the SDR-HDR conversion process on the HDR video content will occur, and there is a possibility that a display video with crushed brightness or crushed color will be difficult to see. Will end up. Therefore, when switching from the SDR video content to the HDR video content, the main control unit 101 sets the switching timing of the video processing of the video color gamut conversion unit 142 to be earlier than the switching timing of the decoded video from the video decoder 141. The processing timing of the video decoder 141 and the video color gamut conversion unit 142 may be controlled. Alternatively, the video may be controlled to be in a video mute state such as black display before the switching of the both starts processing, and the video mute state such as a black display of the video may be released after the switching between the both is completed. ..

In an SDR-compatible display device that performs HDR-SDR conversion processing on HDR video content and displays it without transfer characteristic conversion processing on SDR video content, when switching from HDR video content to SDR video content, When the switching timing of the video processing of the color gamut conversion unit 142 becomes earlier than the switching timing of the decoded video from the video decoder 141, the HDR video content is displayed as it is on the SDR compatible display device without performing the transfer characteristic conversion processing. Therefore, there is a possibility that a hard-to-see display image with crushed brightness and crushed colors may be displayed. Therefore, when the HDR video content is switched to the SDR video content, the main control unit 101 sets the switching timing of the video processing of the video color gamut conversion unit 142 to be later than the switching timing of the decoded video from the video decoder 141. The processing timing of the video decoder 141 and the video color gamut conversion unit 142 may be controlled. Alternatively, the video may be controlled to be in a video mute state such as black display before the switching of the both starts processing, and the video mute state such as a black display of the video may be released after the switching between the both is completed. ..

In an SDR-compatible display device that performs HDR-SDR conversion processing on HDR video content and displays without performing transfer characteristic conversion processing on SDR video content, the video when switching from SDR video content to HDR video content When the switching timing of the video processing of the color gamut conversion unit 142 becomes later than the switching timing of the decoded video from the video decoder 141, the HDR video content is displayed on the SDR-compatible display device without performing the transfer characteristic conversion processing. Therefore, there is a possibility that a hard-to-see display image with crushed brightness and crushed colors may be displayed. Therefore, when switching from the SDR video content to the HDR video content, the main control unit 101 sets the switching timing of the video processing of the video color gamut conversion unit 142 to be earlier than the switching timing of the decoded video from the video decoder 141. The processing timing of the video decoder 141 and the video color gamut conversion unit 142 may be controlled. Alternatively, the video may be controlled to be in a video mute state such as black display before the switching of the both starts processing, and the video mute state such as a black display of the video may be released after the switching between the both is completed. ..

As described above, it is possible to avoid presenting to the user an unsightly display image with crushed luminance or crushed colors by performing processing related to the timing of switching the decoded video and the timing of switching the transfer characteristic conversion processing. Becomes

In place of or in addition to the identification processing and various video processing using the "EOTF_identification" parameter in the content information descriptor described above, the same identification as the above-mentioned "EOTF_identification" parameter can be performed in the encoded video stream. The flag may be inserted, and the identification processing and various video processing using the inserted flag may be performed. The identification processing and various video processing when the “EOTF_identification” flag is used as the flag in the encoded video stream is the same as the identification processing and various video processing when the “EOTF_identification” parameter in the content information descriptor is used. In the description, instead of referring to the “EOTF_identification” parameter in the content information descriptor, it may be performed by referring to the “EOTF_identification” flag inserted in the encoded video stream, and thus detailed description is omitted. To do.

However, if the "EOTF_identification" flag as the flag in the encoded video stream is inserted into the encoded video stream in units of frames or GOPs, for example, the contents information descriptor set in units of assets or programs will be set. Switching between HDR video content and SDR video content and switching of various video processing corresponding to each video content can be realized in a finer time unit than when the “EOTF_identification” parameter is used. That is, the video decoder 141 can recognize the switching between the HDR video content and the SDR video content in frame units or GOP units, and the video color gamut conversion unit 142 in the subsequent stage further determines the HDR video content and the SDR video content in frame units or GOP units. Since it is possible to refer to the identification information of the content, the synchronization accuracy of the switching timing of the video processing in the video color gamut conversion unit 142 is improved as compared with the case of using the "EOTF_identification" parameter in the content information descriptor. There is.

When the transmission of the “EOTF_identification” flag in the encoded video stream and the transmission of the “EOTF_identification” parameter in the content information descriptor are used together, the identification process using the “EOTF_identification” flag in the encoded video stream is The “EOTF_identification” parameter in the content information descriptor, which is used for switching the video processing of the video color gamut conversion unit 142, is, for example, a program for displaying a program guide or a program information for each HDR video content program. If it is used for display to inform the user whether it is an SDR video content program or the like, it is possible to properly use the identification information of both.

Further, when the transmission of the “EOTF_identification” flag in the encoded video stream and the transmission of the “EOTF_identification” parameter in the content information descriptor are used in combination, the processing when the identification information of the both is inconsistent, The following are possible: The first processing example is an example of preferentially using the "EOTF_identification" flag in the encoded video stream. In this case, there is an advantage that the switching between the HDR video content and the SDR video content as described above can be accurately synchronized with the switching timing of the corresponding video processing. A second processing example is an example of preferentially using the "EOTF_identification" parameter in the content information descriptor. In this case, there is an advantage that the transfer characteristics and the like can be quickly identified without referring to the encoded video stream.

The content information descriptor described above may have a data structure different from that shown in FIG. 29A. For example, another parameter different from each of the parameters may be further included, or all of the parameters may not be included. Also, different names may be used for the respective parameters. Further, each parameter does not necessarily need to be described in one descriptor, and may be described in two different descriptors, for example. Further, each of the parameters may be described in the descriptor and arranged in the table, or may be directly described in the table.

[EPG display of broadcast receiving device]
Also in the broadcast receiving apparatus 100 of the present embodiment, as in the first embodiment, the information such as the start time and the broadcast time of each event (broadcast program) is identified by referring to the MH-EIT and the like to identify the service ID. It is assumed that it is possible to obtain the EPG screen and create the EPG screen, and the created EPG can be displayed on the monitor unit 162 by being superimposed on the video information or the like by the video synthesizing unit 161.

Further, in the broadcast receiving apparatus 100 of the present embodiment, the “content_type” parameter of the content information descriptor is referred to, and when the video content type of each broadcast program is “1” or “3”, As shown in 30, a symbol or the like representing an attribute indicating that the broadcast program is a program compatible with HDR may be displayed. The symbol or the like indicating the attribute may be, for example, a symbol/character indicating that it is a broadcast program compatible with HDR, or “HDR” that means a broadcast program compatible with HDR is symbolized. The marked mark 162a5 may be used. The symbol or the like indicating the attribute may be displayed in the title area 162a2 of the detailed information 162a1. Alternatively, when the cursor is placed on the detailed information 162a1, it may be displayed in a pop-up. It may be displayed by other methods.

If the content information descriptor additionally has a parameter “HDR_flag” or the like indicating whether or not the video content of the broadcast program is compatible with HDR, refer to the “HDR_flag” parameter. By doing so, it may be possible to control whether or not to display a symbol or the like indicating an attribute indicating that the broadcast program is a program compatible with HDR. The name of the “HDR_flag” parameter is an example, and different names may be used.

When all or any of the “source_luminance_max” parameter, the “max_light_level_of_content” parameter, the “max_light_level_of_frame” parameter, or the like of the content information descriptor exceeds a predetermined value (for example, “100 (cd/m ² )”), Control may be performed so as to display a symbol or the like indicating an attribute indicating that the broadcast program is a program compatible with HDR.

It should be noted that by referring to the “content_type” parameter or the like of the content information descriptor, even when the type of the video content of each broadcast program is “1” or “3”, or when the “source_luminance_max” of the content information descriptor is used. Even if all or any of the “” parameter, the “max_light_level_of_content” parameter, the “max_light_level_of_frame” parameter, or the like exceeds a predetermined value (for example, “100 (cd/m ² )” or the like), the monitor unit of the broadcast receiving apparatus 100. If 162 does not support HDR, a symbol/character indicating that the broadcast program corresponds to the HDR or a mark 162a5 that encodes "HDR" that means that the broadcast program corresponds to the HDR is displayed. You may control so that it may not be performed.

Also, the broadcast receiving apparatus 100 of the present embodiment refers to the “EOTF_identification” parameter of the content information descriptor, and the type of gamma correction applied to the video content of each broadcast program is the monitor unit 162 of the broadcast receiving apparatus 100. If the type is compatible with the display characteristics, a symbol or the like indicating an attribute indicating that the broadcast program is a program that can be displayed with a correct luminance expression may be displayed. The symbol or the like representing the attribute may be, for example, a symbol/character indicating that the program can be displayed with the correct luminance expression, or a program that can be displayed with the correct luminance expression. It may be a mark 162a6 in which “Contrast” is symbolized. The case where the type of gamma correction applied to the video content of each broadcast program is a type that can be supported by the display characteristics of the monitor unit 162 of the broadcast receiving apparatus 100 is, for example, “EOTF_identification related to the video content. Parameter is “0”, and the display characteristic of the monitor unit 162 of the broadcast receiving apparatus 100 is BT. 709, and so on.

By displaying the symbols representing the attributes as described above on the detailed information 162a1 of the EPG screen 162a, the user can determine whether or not each broadcast program displayed on the EPG screen 162a is compatible with HDR and a correct luminance expression. It is possible to easily grasp whether or not the program can be displayed by.

[Color gamut conversion processing of broadcast receiving device]
In this embodiment, it is assumed that the video content, which is a recorded program, has been subjected to video/audio editing processing by the editing device 390e, as shown in FIG. That is, the video content provider edits and edits the video content while checking it on the monitor device of the editing device 390e. Therefore, the video content is suitable under the color reproduction performance of the monitor device of the editing device 390e. There is a high possibility that it will be displayed. On the other hand, it is general that the monitor unit 162 of the broadcast receiving apparatus 100, which is a monitor apparatus used by the user to view the video content, also has different color reproduction performance depending on the manufacturer and the model. In this case, if the color reproduction performance of the monitor device of the editing device 390e and the color reproduction performance of the monitor unit 162 of the broadcast reception device 100 are significantly different, the video content is displayed on the monitor unit 162 of the broadcast reception device 100. In doing so, there is a possibility that a problem may occur in which the video content provider cannot correctly express the intended video expression.

That is, in the broadcasting system of the present embodiment, as described above, the content information descriptor is transmitted as the MMT-SI descriptor. In this content information descriptor, as a parameter indicating information about the color reproduction performance of the source device, each primary color of R/G/B of the color gamut that the source device can support and a white reference point on the CIE chromaticity diagram are shown. Coordinate values are shown.

Further, in the broadcast receiving apparatus 100 of the present embodiment, various information storage areas of the storage unit 110 have a color gamut R/G/that can be supported by the monitor unit 162 as a parameter indicating information regarding color reproduction performance of the monitor unit 162. It is assumed that the coordinate values of each primary color of B and the white reference point on the CIE chromaticity diagram are stored. In the above situation, the coordinates of each primary color of R/G/B and the white reference point of the color gamut that the source device can support, which are described in the content information descriptor, are R0/ G0/B0 and W0, and the coordinates of each primary color of R/G/B and the white reference point of the color gamut which can be supported by the monitor unit 162 stored in the various information storage areas of the storage unit 110 are R1/ In the case of G1/B1 and W1, in particular, of the area configured by R0/G0/B0 which is the color gamut which the source device can support, R1/G1/ which is the color gamut which the monitor unit 162 can support. A portion that does not overlap with the area configured by B1 is an area that may not be correctly displayed on the monitor unit 162.

In order to solve the above-mentioned problem, the broadcast receiving apparatus 100 of the present embodiment stores the color gamut described in the content information descriptor that the source device can support and various information storage areas of the storage unit 110. A color gamut conversion processing function for converting the video data of the video content into video data suitable for display on the monitor 162 when there is a deviation from the color gamut that the monitor 162 can support is provided. .. Hereinafter, the color gamut conversion function included in the broadcast receiving apparatus 100 will be described.

The color gamut conversion processing function provided in the broadcast receiving apparatus 100 of the present embodiment is, in other words, the color gamut of the video data (R0/G0/B0 shown in FIG. This is a function of converting a color gamut based on the color reproduction performance of the monitor unit 162 (area equivalent to the configured area) (an area configured by R1/G1/B1 shown in FIG. 31A).

The color gamut conversion processing function provided in the broadcast receiving apparatus 100 of the present embodiment is such that the color gamut of the video data is R/G/of the color gamut that can be supported by the source device described in the content information descriptor. By referring to the coordinate value of each primary color of B and the coordinate value of each primary color of R/G/B of the color gamut that can be supported by the monitor unit 162 stored in the various information storage areas of the storage unit 110, The conversion may be performed so that correct color reproduction can be performed on the monitor unit 162.

On the line segment R0/G0 (or in the vicinity thereof), the R/G primary color coordinate values of the color gamut compatible with the source device and the R/G primary colors of the color gamut compatible with the monitor unit 162 are supported. The color gamut conversion processing may be performed by referring to only the coordinate values of. On the line segment G0/B0 (or in the vicinity thereof), the coordinate values of the G/B primary colors of the color gamut compatible with the source device and the G/B primary colors of the color gamut compatible with the monitor unit 162 are displayed. The gamut conversion process may be performed by referring to only the coordinate values. On the line segment R0/B0 (or in the vicinity thereof), the coordinate values of the R/B primary colors of the color gamut compatible with the source device and the R/B primary colors of the color gamut compatible with the monitor unit 162 are displayed. The gamut conversion process may be performed by referring to only the coordinate values.

Alternatively, as shown in FIG. 31B, the color gamut of the video data may be divided into three areas, and the color gamut conversion processing may be different for each of the divided areas. For example, in the region formed by R0/G0/W0 in the color gamut of the video data, the coordinate values of each primary color of R/G and the white reference point of the color gamut that the source device can support and the monitor. The color gamut conversion processing is performed by referring to each primary color of R/G of the color gamut that the unit 162 can support and the coordinate value of the white reference point. In the area formed by G0/B0/W0 in the color gamut of the video data, the coordinate values of each primary color of G/B and the white reference point of the color gamut that the source device can support and the monitor unit 162. The color gamut conversion processing is performed by referring to each of the G/B primary colors of the color gamut that can be supported by and the coordinate value of the white reference point. In the area formed by R0/B0/W0 in the color gamut of the video data, the R/B primary colors of the color gamut compatible with the source device and the coordinate values of the white reference point and the monitor unit 162. The color gamut conversion process is performed by referring to each of the R/B primary colors of the color gamut that can be processed by and the coordinate value of the white reference point.

Further, when the color gamut conversion processing is different for each of the divided areas, further, on the line segment R0/W0 (or in the vicinity thereof), the R primary color and the white reference point of the color gamut that the source device can support are The color gamut conversion process may be performed by referring to only the coordinate values and the coordinate values of the R primary color and the white reference point of the color gamut that the monitor 162 can correspond to. On the line segment G0/W0 (or in the vicinity thereof), the G primary color of the color gamut compatible with the source device and the coordinate value of the white reference point and the G primary color of the color gamut compatible with the monitor unit 162 and The color gamut conversion process may be performed by referring to only the coordinate values of the white reference point. On the line segment B0/W0 (or in the vicinity thereof), the B primary color of the color gamut compatible with the source device and the coordinate value of the white reference point and the B primary color of the color gamut compatible with the monitor unit 162 and The color gamut conversion process may be performed by referring to only the coordinate values of the white reference point.

An example of the color gamut conversion processing will be described with reference to FIG. 31C. In the figure, R0, G0, and B0 are the coordinates of each primary color of R/G/B of the color gamut that can be supported by the source device described in the content information descriptor, respectively (R0x, R0y), It has the coordinate values of (G0x, G0y) and (B0x, B0y). Further, R1, G1, and B1 are coordinates of each primary color of R/G/B of a color gamut that can be supported by the monitor unit 162 stored in various information storage areas of the storage unit 110, respectively (R1x, R1y). ), (G1x, G1y), and (B1x, B1y). Further, P0 is predetermined color gamut data of the video content and has a coordinate value of (P0x, P0y). In this case, the color gamut data of P0 is converted into the color gamut data of P1 by the color gamut conversion processing. It should be noted that P1 has a coordinate value of (P1x, P1y), and is calculated by the arithmetic expression of the color gamut conversion processing shown below as an example.

<Example of arithmetic expression for color gamut conversion processing>
P1=αR1+βG1+γB1
However,
α={(G0y-B0y)(P0x-B0x)+(B0x-G0x)(P0y-B0y)}/{(G0y-B0y)(R0x-B0x)
+(B0x-G0x)(R0y-B0y)}
β={(B0y-R0y)(P0x-B0x)+(R0x-B0x)(P0y-B0y)}/{(G0y-B0y)(R0x-B0x)
+(B0x-G0x)(R0y-B0y)}
γ=1-α-β

It should be noted that the arithmetic expression is a color gamut R/R that is compatible with the source device described in the content information descriptor for the color gamut conversion processing of all color gamut data in the color gamut area of the video content. By referring to the coordinate value of each primary color of G/B and the coordinate value of each primary color of R/G/B of the color gamut that can be supported by the monitor unit 162 stored in various information storage areas of the storage unit 110 This is an example of the case. Even when the color gamut of the video data is divided into three areas and the color gamut conversion processing is different for each divided area, the same calculation can be performed. (However, the parameters to be referred to are different.) Further, since the arithmetic expression is a known arithmetic expression using a barycentric coordinate system, detailed description regarding the derivation of the arithmetic expression will be omitted. Further, the above-mentioned arithmetic expression is merely an example, and the coordinate value of P1 may be calculated using a different arithmetic expression.

Further, when the entire gamut area of the video content is included in the gamut area that can be supported by the monitor device (broadcast receiving device 100 or the like), the gamut conversion process may not be performed. .. For example, the color gamut of the video content is BT. 709 system color gamut, and a color gamut that a monitor device (broadcast receiving device 100 or the like) can support is the same as the BT. When the color gamut is equivalent to that of the 2020 system, the BT. 709. The entire color gamut of the 709 system is the BT. Since it is included in the color gamut of the 2020 system, it is not necessary to perform the color gamut conversion processing. That is, the monitor device (broadcast receiving device 100 or the like) can display all color gamut data included in the video content.

As described above, according to the color gamut conversion processing function of the broadcast receiving apparatus 100 of the present embodiment, the color reproduction performance of the source device differs from the color reproduction performance of the monitor unit 162 of the broadcast receiving apparatus 100. Even when the video content is displayed, the video content can be preferably displayed when the video content is displayed on the monitor unit 162 of the broadcast receiving apparatus 100.

[Brightness adjustment processing of broadcast receiving device]
The broadcast receiving apparatus 100 according to the present embodiment is assumed to have image quality adjustment items as shown in FIG. Each of the image quality adjustment items can be adjusted by the user's operation according to the user's preference. On the other hand, among the image quality adjustment items, the items related to the brightness adjustment may be capable of automatic brightness adjustment with reference to the description of the content information descriptor. Hereinafter, the process of the automatic brightness adjustment will be described.

In the broadcast receiving apparatus 100 of the present embodiment, automatic brightness adjustment is performed by referring to (1) “source_luminance_max” parameter and “source_luminance_min” parameter of the content information descriptor, (2) “max_light_level_of_content” parameter and “source_luminance_min”. It is assumed that the automatic brightness adjustment can be performed by referring to the parameter, and (3) the automatic adjustment can be performed by referring to only the “max_light_level_of_content” parameter.

In the broadcast receiving apparatus 100 according to the present embodiment, the maximum value and the minimum value of the brightness that can be displayed on the monitor unit 162 are stored in the various information storage areas of the storage unit 110 as parameters indicating the information regarding the brightness display performance of the monitor unit 162. It is assumed that

The automatic brightness adjustment of the above method (1) is displayed on the “source_luminance_max” parameter and “source_luminance_min” parameter described in the content information descriptor, and the monitor unit 162 stored in various information storage areas of the storage unit 110. This is performed by referring to the maximum value/minimum value of possible brightness.

That is, as shown in FIG. 33A, the brightness level indicated by the “source_luminance_max” parameter is approximately matched to the brightness level of the maximum value of the brightness that can be displayed on the monitor unit 162, and the “source_luminance_min” parameter is changed. The conversion processing of the luminance expression range of the video content is performed so that the indicated luminance level substantially matches the luminance level of the minimum value of the luminance that can be displayed on the monitor unit 162. By performing the conversion process of the brightness expression range, the user can monitor the video content of which the brightness expression is similar to that of the monitor device of the editing device 390e used by the content provider for editing the content by the monitor unit of the broadcast receiving apparatus 100. It becomes possible to watch at 162.

The automatic brightness adjustment of the method (2) is displayed on the “max_light_level_of_content” parameter and the “source_luminance_min” parameter described in the content information descriptor, and the monitor unit 162 stored in various information storage areas of the storage unit 110. This is performed by referring to the maximum value/minimum value of possible brightness.

That is, as shown in FIG. 33B, the brightness level indicated by the “max_light_level_of_content” parameter is approximately matched to the maximum brightness level that can be displayed on the monitor 162, and the “source_luminance_min” parameter is set. The conversion processing of the luminance expression range of the video content is performed so that the indicated luminance level substantially matches the luminance level of the minimum value of the luminance that can be displayed on the monitor unit 162. By performing the conversion process of the brightness expression range, the user can enjoy the video content while making full use of the contrast performance of the monitor unit 162 of the broadcast receiving apparatus 100.

When the content information descriptor further has a parameter indicating the minimum brightness in each scene (chapter) (for example, “min_light_level_of_content (minimum content brightness)”), the “source_luminance_min” parameter is substituted. By referring to the “min_light_level_of_content” parameter, the contrast performance of the monitor unit 162 of the broadcast receiving apparatus 100 can be used more effectively.

Further, the conversion processing of the luminance expression range in the above method (2) may be performed by changing the reference parameter for each scene (chapter) when the “num_of_scene” parameter is not “1”. In this case, it is possible to ensure suitable contrast performance in the monitor unit 162 of the broadcast receiving apparatus 100 for each scene (chapter).

In the automatic brightness adjustment of the method (3), the “max_light_level_of_content” parameter described in the content information descriptor and the maximum value of the brightness that can be displayed on the monitor unit 162 stored in the various information storage areas of the storage unit 110. Is done by referring to. The minimum value of luminance is based on "0 (cd/m ² )". In this case, it is possible to obtain the same effect as the automatic brightness adjustment of the method of (2), and it is possible to perform the conversion processing of the brightness expression range by a simple calculation by referring to a small number of parameters.
Further, the conversion processing of the luminance expression range can be displayed on the monitor unit 162 in which various parameters of the “source_luminance_max” parameter and the “max_light_level_of_content” parameter described in the content information descriptor are stored in various information storage areas of the storage unit 110. It may be performed only when the brightness is larger than the maximum value.

That is, when the “source_luminance_max” parameter and the “max_light_level_of_content” parameter described in the content information descriptor are larger than the maximum value of the brightness that can be displayed by the monitor unit 162 stored in the various information storage areas of the storage unit 110, This is because when the received video content is displayed as it is on the monitor unit of the broadcast receiving apparatus 100, the luminance collapse may occur, but in the opposite case, the luminance collapse may not occur.

As described above, according to the process of the automatic brightness adjustment of the broadcast receiving apparatus 100 of the present embodiment, the user can refer to the content information descriptor so that the user can display the content on the monitor unit 162 of the broadcast receiving apparatus 100. It becomes possible to view the video content by expressing the brightness.

According to the present embodiment, by referring to the content information attached to the program content included in the broadcast wave, it is possible to perform the above-described processes corresponding to the HDR and the expansion of the color gamut, and more useful MMT compatible broadcast reception. A device can be provided.
(Example 4)

Example 4 of the present invention will be described below. Note that the configuration, effects, and the like in this embodiment are the same as those in the third embodiment unless otherwise specified. Therefore, in the following, differences between the present embodiment and the third embodiment will be mainly described, and common points will be omitted as much as possible to avoid duplication.

[System configuration]
FIG. 34 is a system configuration diagram showing an example of a broadcast communication system including the broadcast receiving apparatus according to the present embodiment. The broadcast communication system according to the present embodiment includes a broadcast receiving device 40100, an antenna 40100a, a connection cable 40200, a monitor device 40300, a broadband network such as the Internet 200 and a router device 200r, a radio tower 300t of a broadcasting station, and a broadcasting satellite (or a communication satellite). 300s, broadcasting station server 300, service provider server 400, and other application server 500. Although illustration is omitted, the access point 200a, the mobile telephone communication server 600, and the base station 600b of the mobile telephone communication network are connected by the same connection as the system configuration diagram (see FIG. 1) of the broadcast communication system of the first embodiment. , Portable information terminal 700 may be further included. In that case, the mobile information terminal 700 may be capable of directly communicating with the broadcast receiving device 40100 without using the router device 200r or the like.

Further, as shown in FIG. 28, the encoded data of the program content included in the broadcast wave transmitted from the radio tower 300t may be the one output from the photographing device 390c, or may be various data from the editing device 390e. The image/audio may be edited.

The broadcast receiving device 40100 receives the broadcast wave transmitted from the radio tower 300t via the broadcast satellite (or communication satellite) 300s and the antenna 40100a. Alternatively, the broadcast wave transmitted from the radio tower 300t may be directly received from the antenna 40100a without passing through the broadcast satellite (or communication satellite) 300s. The broadcast receiving device 40100 can be connected to the Internet 200 via the router device 200r, and can send and receive data by communicating with each server device on the Internet 200 and other communication devices.

The connection cable 40200 is a communication cable that connects the broadcast receiving apparatus 40100 and the monitor apparatus 40300, and transmits encoded video/audio data output from the broadcast receiving apparatus 40100. The monitor device 40300 provides video information and audio information obtained by subjecting encoded video/audio data and the like received via the connection cable 40200 to predetermined signal processing, via a display device such as a liquid crystal panel and a speaker. The video display device provided to the user.

Further, the monitor device 40300 may be connectable to the Internet 200 via the router device 200r and may be capable of transmitting and receiving data by communication with each server device on the Internet 200 and other communication devices. Further, the monitor device 40300 may be capable of receiving the broadcast wave transmitted from the radio tower 300t via the antenna 40300a (not shown).

[Hardware configuration of broadcast receiving device]
FIG. 35A is a block diagram showing an example of the internal configuration of broadcast receiving apparatus 40100. The broadcast receiving device 40100 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 40125, 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 video output unit 163, a voice synthesis unit 164, a voice output unit 166, an operation input unit 170, and a transcode processing unit 40181. ..

The broadcast receiving apparatus 40100 of the present embodiment is assumed to be an optical disk drive recorder such as a DVD recorder or a BD recorder, a magnetic disk drive recorder such as an HDD recorder, or an STB. That is, as compared with the broadcast receiving apparatus 100 of the first embodiment, the monitor unit 162 and the speaker unit 165 may be omitted.

The digital interface unit 40125 is an interface that outputs or inputs encoded digital video data and/or digital audio data. The digital interface unit 40125 can output the MMT data sequence demodulated by the tuner/demodulation unit 131, the MMT data sequence acquired via the LAN communication unit 121, or the mixed data of each MMT data sequence as it is. I shall. Further, the MMT data string input from the digital interface unit 40125 may be controlled to be input to the separating unit 132.

The output of the digital content stored in the storage (storage) unit 110 or the storage of the digital content in the storage (storage) unit 110 may be performed via the digital interface unit 40125. The digital interface unit 40125 is a DVI terminal, an HDMI (registered trademark) terminal, a Display Port (registered trademark) terminal, or the like, and is in a format conforming to the DVI specification, the HDMI specification, the Display Port specification, or the like, and the video composition unit 161. Also, it may be controlled to output the video data, the audio data, and the like output from the audio synthesis unit 164.

The transcode processing unit 40181 is a signal processing unit that performs a transcode operation process for converting the encoding format, bit rate, media transport system, etc. of each component that constitutes the content. For example, the transcode processing unit 40181 outputs the MMT data string of the content of the broadcast program including the video component of the MPEG-H HEVC format output from the separation unit 132 in the MPEG-2 or MPEG-4 AVC (Advanced Video Coding) format. It is assumed that the program content including the video component can be converted into an MPEG2-TS data string (or MPEG2-PS data string) or the like.

Further, it is also possible to perform processing such as changing only the bit rate without changing the component encoding format and the media transport method. The program content that has been subjected to the transcode calculation processing can be stored in the storage section 110 as recorded content or can be output from the digital interface section 40125 or the like and supplied to an external monitor device or the like. Shall be

[Software configuration of broadcast receiving device]
FIG. 35B is a software configuration diagram of the broadcast receiving apparatus 40100 of the present embodiment, and shows the software configurations of the ROM 103, the RAM 104, and the storage (accumulation) unit 110. It is assumed that a transcode processing program 41003 and a recording/reproducing processing program 41004 are added to the storage (accumulation) unit 110, as compared with the software configuration diagram (see FIG. 7D) of the broadcast receiving apparatus 100 of the first embodiment.

The transcode processing program 41003 and the recording/reproducing processing program 41004 stored in the storage (accumulating) unit 110 are expanded in the RAM 104, respectively, and the main control unit 101 further executes the expanded transcode processing program and the recording/reproducing processing program. As a result, the transcode processing execution unit 41103 and the recording/reproduction processing execution unit 41104 are configured. The transcode processing execution unit 41103 mainly controls the transcode operation processing in the transcode processing unit 40181. The recording/playback processing execution unit 41104 mainly controls the recording processing of the content of the broadcast program in the content storage area 1200 and the playback processing of the recorded content from the content storage area 1200.

The reception function execution unit 1102 expanded in the RAM 104 further includes an output control unit 41102i. The output control unit 41102i of the reception function execution unit 1102 controls each process related to data output from the video output unit 163, the audio output unit 166, and the digital interface unit 40125.

Note that the software configuration shown in FIG. 35B is merely an example, and in the present embodiment, it is not necessary to include all the illustrated programs and execution units.

[Interface configuration between broadcast receiving device and monitor device]
FIG. 36 is a system configuration diagram showing an example of an interface configuration between the broadcast receiving device 40100 and the monitor device 40300. In the present embodiment, regarding the case where the connection terminal (not shown) of the digital interface section 40125 on the side of the broadcast receiving apparatus 40100 and the connection terminal of the digital interface section (not shown) on the side of the monitor apparatus 40300 are connected by the connection cable 40200. explain. Note that monitor device 40300 may have the same configuration as broadcast receiving device 100 shown in FIG. 7A. In this case, the digital interface unit 125 corresponds to the above-mentioned digital interface unit on the monitor device 40300 side, and the connection cable 40200 is connected to the connection terminal thereof.

As shown in FIG. 36, the connection cable 40200 includes n pairs of differential transmission lanes CH1 to CHn, a DDC (Display Data Channel) line standardized by VESA (Video Electronics Standard Association), and an HPD (Hot Plug Detect). ) Line, a CEC (Consumer Electronics Control) line, and the like. The differential transmission lane may be referred to as a differential transmission line.

The n pairs of differential transmission lanes may be one pair of clock lanes and (n-1) pairs of data lanes. For example, n=4 may be one pair of clock lanes and three pairs of data lanes, or n=2 may be one pair of clock lanes and one pair of data lanes. Further, all of the n pairs of differential transmission lanes may be data lanes for transmitting data on which a clock is superimposed. For example, n=4 and four pairs of data lanes may be used. The clock lane and the data lane may be referred to as a clock line and a data line, respectively.

In the data lane, digital video (R/G/B/Vsync/Hsync, Y) is transmitted from the video synthesizing unit 161 or the audio synthesizing unit 164 via the transmission processing unit 40125b of the digital interface unit 40125 on the broadcast receiving device 40100 side. /Pb(Cb)/Pr(Cr), etc.)/voice signals and other control signals may be output in a predetermined format. The predetermined format may conform to specifications such as HDMI (registered trademark), and detailed description thereof will be omitted. The digital video/audio signal and other control signals are received by the reception processing unit 40325b of the digital interface unit on the monitor device 40300 side, and the image processing unit and the audio processing unit (not shown) perform image quality adjustment, volume adjustment, and the like. Necessary processing is appropriately performed and output from the display unit and the speaker of the monitor device 40300.

Although not shown, the connection cable 40200 may further include a power supply line, a GND line, and a backup line. The n pairs of differential transmission lanes, communication lines, etc. may be shielded by a GND line. All or part of the backup line, DDC line, HPD line, and CEC line may also be used as a part of a communication line for network communication. For example, the backup line and the HPD line may constitute one transmission line and one reception line of the communication line, or one pair of transmission/reception lines. The CEC line and the like may be omitted. The DDC line may be used as an I2C (I-squared-C) communication line between the main control unit 101 of the broadcast receiving device 40100 and the main control unit (not shown) of the monitor device 40300.

The transmission processing unit 40125b of the digital interface unit 40125 on the broadcast receiving device 40100 side communicates with the reception processing unit 40325b of the digital interface unit on the monitoring device 40300 side via the DDC line, and further, the EDID (Extended) from the EDID storage unit 40325c. It shall be possible to read the Display Identification Data). That is, the broadcast receiving device 40100 can grasp the display performance of the monitor device 40300 by acquiring the EDID.

In the present embodiment, the display performance refers to the input resolution and frame rate compatible with the monitor device 40300, video standard, compatibility with 3D image display, or the monitor device 40300 expanding HDR and color gamut. Items such as whether or not processing corresponding to is possible.

Further, in the present embodiment, as a means for the broadcast receiving device 40100 to grasp the display performance of the monitor device 40300, the following description will be given by taking the process of acquiring the EDID as an example. However, the acquired information is not limited to EDID. For example, performance identification information that is information different from the EDID and that identifies the display performance or function of the monitor device 40300 may be acquired. Further, the display performance of the monitor device 40300 may be grasped by means other than acquiring the performance identification information.

Also, the transmission control unit 40125a of the digital interface unit 40125 on the side of the broadcast receiving device 40100 controls the transmission processing unit 40125b, and the monitor device 40300 is connected via the HPD line and the power supply of the monitor device 40300. It is possible to detect that the switch is turned on. In addition, the transmission control unit 40125a of the digital interface unit 40125 on the broadcast receiving device 40100 side can perform processing such as turning on the power of the monitor device 40300 via the CEC line or the like. The reception control unit 40325a of the digital interface unit on the monitor device 40300 side also controls the reception processing unit 40325b.

Note that the configuration of the connection cable 40200, the internal configuration of the digital interface unit 40125 of the broadcast receiving apparatus 40100, and the internal configuration of the digital interface unit of the monitor device 40300 illustrated in FIG. 36 are merely examples, and may be different configurations. ..

[Each parameter of mastering information]
Also in the present embodiment, as in the case of the third embodiment, the content information descriptor shown in FIG. 29A is transmitted together with each message/table/descriptor of the above-mentioned MMT-SI as control information related to the program content. Shall be. On the other hand, the broadcast receiving apparatus 40100 of the present embodiment does not include a monitor unit or a speaker that finally provides a video signal and an audio signal to the user, and the encoded video is transmitted to the monitor apparatus 40300 via the connection cable 40200. /Sending audio data and the like to allow the monitor device 40300 to provide a video signal and an audio signal to the user. That is, the processes such as the color gamut conversion process and the brightness adjustment process described in the third embodiment are performed on the monitor device 40300 side according to the display performance of the display unit of the monitor device 40300.

The broadcast receiving device 40100 of the present embodiment receives the content information descriptor from a broadcast wave and enables each parameter described in the received content information descriptor in order to enable each of the processes on the monitor device 40300 side. Is appropriately selected, and the mastering information having a predetermined format is transmitted to the monitor device 40300 via the connection cable 40200. Note that, for example, when the connection cable 40200 is an HDMI (registered trademark) cable and the video data and audio data output from the digital interface unit 40125 and other control signals are in a format that conforms to the HDMI (registered trademark) specifications. The mastering information may be output as a part of the other control signals or the like.

FIG. 37 shows a list of each parameter transmitted by the broadcast receiving device 40100 of this embodiment to the monitor device 40300 as the mastering information.

“Source_primaries_R[x,y]”, “source_primaries_G[x,y]”, and “source_primaries_B[x,y]” are parameters indicating the color reproduction performance of the source device, and can be supported by the source device. The color gamut is represented by the coordinate values on the CIE chromaticity diagram of each primary color of R (red)/G (green)/B (blue). The “source_primaries_rix”, “source_prime__x”, “source_primary_x”, “source_primary_ry”, “source_prime_ry”, “source_prime_x”, “source_primary_rix_ry”, “source_primary_rix_ry”, “source_primary_rix_ry”, “source_primary_rix_ry”, “source_primary_ry_bx”, “source_primary_rix_gy”, “source_primary_ry_bx”, “source_primary_ry_bx”, “source_primary_ry_bx”, “source_primary_ry_bx”, “source_primary_ry_bx”, “source_primary_ry_bx”, “source_primary_ry_bx”, “source_primary_ry_bx”, “source_primary_ry_bx”, and “source_primary_ry_bx”. ], “source_primaries_G[x,y]”, and “source_primaries_B[x,y]” parameters.

“White_point_x, y” is a parameter indicating information about the color reproduction performance of the source device, and indicates the coordinate value on the CIE chromaticity diagram of the white reference point that the source device can support. The “source_white_point_x” and “source_white_point_y” parameters described in the content information descriptor may be selected and output as the “white_point_x,y” parameter of the mastering information.

“Max_source_mastering_luminance” is a parameter indicating information about the maximum brightness that the source device can support. The value is shown in the range of “1 (cd/m ² : candela/square meter)” to “65535 (cd/m ² )”. The “source_luminance_max” parameter described in the content information descriptor may be selected and output as the “max_source_mastering_luminance” parameter of the mastering information.

“Min_source_mastering_luminance” is a parameter indicating information about the minimum luminance that the source device can support. The value is shown in the range of “0.0001 (cd/m ² )” to “6.5535 (cd/m ² )”. The “source_luminance_min” parameter described in the content information descriptor may be selected and output as the “min_source_mastering_luminance” parameter of the mastering information.

“Maximum_Content_Light_Level” is a parameter indicating the maximum brightness in the content. The value is shown in the range of “1 (cd/m ² )” to “65535 (cd/m ² )”. The “max_light_level_of_content” parameter described in the content information descriptor may be selected and output as the “Maximum_Content_Light_Level” parameter of the mastering information.

“Maximum_Frame-average_Light_Level” is a parameter indicating the maximum value of the average frame brightness in the content. The value is shown in the range of “1 (cd/m ² )” to “65535 (cd/m ² )”. The “max_frame_ave_light_level” parameter described in the content information descriptor may be selected and output as the “Maximum_Frame-average_Light_Level” parameter of the mastering information.

The “Light Level Status” is a 2-bit flag signal, and represents the status of the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter.

When the value of this flag is "00b", the "Maximum_Content_Light_Level" parameter and the "Maximum_Frame-average_Light_Level" parameter indicate the maximum brightness and the maximum value of the frame average brightness throughout the content. When the value of this flag is "01b", the "Maximum_Content_Light_Level" parameter and the "Maximum_Frame-average_Light_Level" parameter indicate the maximum value of the maximum brightness and the frame average brightness of each scene (chapter).

When the value of this flag is “10b”, it indicates that the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter are omitted. Instead of setting the value of this flag to “10b”, the value of the “Maximum_Content_Light_Level” parameter and the value of the “Maximum_Frame-average_Light_Level” parameter may be set to “0”.

Each of the parameters described above is transmitted as mastering information by the broadcast receiving device 40100 of the present embodiment to the monitor device 40300 via the connection cable 40200, so that the monitor device 40300 transmits the code transmitted from the broadcast receiving device 40100. It is possible to perform processing such as color gamut conversion processing and brightness adjustment processing according to the display performance of the display unit of the monitor device 40300 on the encoded video/audio data and the like. It should be noted that each parameter of the above-mentioned mastering information may further include another parameter different from each parameter shown in FIG. 37, or may not include all of the respective parameters. Also, different names may be used for the respective parameters.

[Mastering information generation process of broadcast receiving device]
In the present embodiment, when the “content_type” parameter of the content information descriptor is “2” or “3”, the video content is content data (live broadcast program, etc.) output from the photographing device 390c, and The content information descriptor does not have a “max_light_level_of_content” parameter and a “max_frame_ave_light_level” parameter. That is, in live broadcast programs and the like, the maximum values of the maximum brightness and the average brightness throughout the content are not determined until the end of the program content.

In this case, the broadcast receiving apparatus 40100 of the present embodiment outputs the mastering information by setting the values of the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter to “0”. Alternatively, the “max_light_level_of_frame” parameter and the “frame_average_light_level” parameter of the content information descriptor may be used to replace the “Maximum_Content_Light_Level” parameter and the “Maximum_Level_level_level” parameter as the “Maximum_Level_level_level” parameter.

On the other hand, when the video content is recorded in the content storage area 1200 of the storage unit 110, the broadcast receiving apparatus 40100 may create the “Maximum_Content_Light_Level” parameter and the “Maximum_Frame-average_Light_Level” parameter. That is, by performing the recording process of the video content, the broadcast receiving apparatus 40100 can scan the video content from the start end to the end, and accordingly, the maximum brightness and the maximum value of the average brightness throughout the entire content. This is because it is possible to determine

Also, when the video content recorded in the content storage area 1200 of the storage (accumulation) unit 110 by the recording process is output to the monitor device 40300 from the digital interface unit 40125 via the connection cable 40200 by the reproduction process, the broadcast receiving device 40100. Control to output the maximum value of the maximum brightness and the average brightness throughout the content created by scanning the video content from the beginning to the end as the "Maximum_Content_Light_Level" parameter and the "Maximum_Frame-average_Light_Level" parameter. You can go. That is, in the case of the video content that has been once recorded, all the parameters of the mastering information can be output to the monitor device 40300 regardless of the value of the “content_type” parameter of the content information descriptor. ..

[Mastering information output control of broadcast receiving device]
Each parameter of the aforementioned mastering information may be always output to the monitor device 40300 connected via the connection cable 40200. Alternatively, the transmission processing unit 40125b of the digital interface unit 40125 on the broadcast receiving device 40100 side can refer to the EDID acquired from the EDID storage unit 40325c of the monitor device 40300, and the monitor device 40300 can perform processing corresponding to HDR and expansion of color gamut. It is also possible to output each parameter of the mastering information to the monitor device 40300 via the connection cable 40200 only when it is understood that Alternatively, only when the content information descriptor indicates that the video content of the broadcast program is a program compatible with HDR, each parameter of the mastering information is monitored via the connection cable 40200. It may be output to 40300.

In addition, when the content information descriptor described above indicates that the video content of the broadcast program is a program compatible with HDR, the “content_type” parameter of the content information descriptor is “1”. Alternatively, in the case of “3”, if the “HDR_flag” parameter of the content information descriptor indicates HDR correspondence of the video content of the broadcast program, the “source_luminance_max” parameter, the “max_light_level_of_content” parameter, or the “max_light_level_of_content” parameter of the content information descriptor or This is the case when all or any of the “max_light_level_of_frame” parameters and the like exceed a predetermined value (for example, “100 (cd/m ² )” or the like).

Also, the output of each parameter of the mastering information may be controlled according to the interface type of the digital interface unit 40125. For example, when the interface type of the digital interface unit 40125 is an HDMI interface, control is performed to output each parameter of the mastering information, and when it is a DVI interface, each parameter of the mastering information is not output. Control, and so on.

Alternatively, the output of each parameter of the mastering information may be controlled according to the interface type of the digital interface unit 40125 on the broadcast receiving device 40100 side and the interface type of the digital interface unit on the monitoring device 40300 side. For example, when both the interface type of the digital interface unit 40125 on the broadcast receiving device 40100 side and the interface type of the digital interface unit on the monitor device 40300 side are HDMI interfaces, control is performed so as to output each parameter of the mastering information. When the interface type of the digital interface unit 40125 on the broadcast receiving device 40100 side is the HDMI interface, but the interface type of the digital interface unit on the monitor device 40300 side is not the HDMI interface (for example, a DVI interface or a Display Port interface) In that case, that is, when the connection cable 40200 is an interface conversion cable), control is performed so that each parameter of the mastering information is not output.

When the digital interface unit 40125 is composed of the first digital interface terminal and the second digital interface terminal, data output is performed from either of the first digital interface terminal and the second digital interface terminal. The control may be performed so that the format of the data to be output differs depending on whether the data is output. In this case, each of the digital interface terminals has the configuration shown in FIG. 36 or another configuration.

For example, when the first digital interface terminal is an HDMI interface and the second digital interface is not an HDMI interface, a video signal and an audio signal are output when data is output from the first digital interface terminal. When output data including the mastering information is generated and data is output from the first digital interface terminal, and when data is output from the second digital interface terminal, a video signal and an audio signal are included. The output data generation process and the data output process may be controlled so that the output data not including the mastering information is generated and the data is output from the second digital interface terminal.

As described above, according to the broadcast receiving apparatus 40100 of the present embodiment, by transmitting the mastering information together with the encoded video/audio data to the monitor apparatus 40300, the gamut conversion processing, the brightness adjustment processing, etc. on the monitor apparatus 40300 side are performed. Can be suitably executed. That is, it is possible to provide a broadcast receiving device capable of executing a function with higher added value.

(Example 5)
Example 5 of the present invention will be described below. Note that the configuration, effects, and the like in this embodiment are the same as those in the fourth embodiment unless otherwise specified. Therefore, in the following, differences between the present embodiment and the fourth embodiment will be mainly described, and common points will be omitted as much as possible to avoid duplication.

[System configuration]
FIG. 38 is a system configuration diagram showing an example of a broadcast communication system including the broadcast receiving apparatus according to the present embodiment. The broadcast communication system of FIG. 38 has the same configuration as the broadcast communication system of FIG. 34, but the output destination to which the broadcast receiving apparatus 40100 outputs the content is an external video processing apparatus 50300 instead of the monitor apparatus 40300. .. This means that the video output device such as a recorder is included in the output destination of the content in addition to the display device. Further, in the broadcast communication system including the broadcast receiving apparatus of the present embodiment, the content is received together with the content received by the broadcast receiving apparatus 40100 via the radio tower 300t of the broadcast station, the broadcast satellite (or communication satellite) 300s, and the broadcast station server 300. This control information is referred to as “reception control information”. This includes the various control information described in the first embodiment and the control information additionally described in the present embodiment. Further, in the broadcast communication system including the broadcast receiving apparatus of the present embodiment, when the broadcast receiving apparatus 40100 outputs the content to the external video processing device 50300 via the network via the router device 200r, the control information to be transmitted together with the content is “output”. Control information".

The hardware configuration of the broadcast receiving device, the software configuration of the broadcast receiving device, the interface configuration of the broadcast receiving device and the monitor device, and the like are the same as those in the fourth embodiment, and thus the repetitive description will be omitted.

In FIG. 35A, by configuring the digital interface unit 40125 using the hardware of the LAN communication unit 121, the digital interface unit 40125 can be output to the output destination on the network. Here, the output of the digital interface unit 40125 is not limited to the MMT data string, and may be an MPEG2-TS data string (or MPEG2-PS data string) transcoded from the MMT data string by the transcode processing unit 40181. This is an example of configuring the "IP interface" described in the first embodiment.

Here, in the broadcast communication system of FIG. 38, the case where the broadcast receiving apparatus 40100 outputs the content to the external video processing apparatus 50300 via the network via the router apparatus 200r means that the broadcast receiving apparatus 40100 transmits the content via the IP interface. Is output to the external video processing device 50300.

As described in the third and fourth embodiments of the present invention, in the broadcast communication system of the present embodiment, not only SDR video contents having a resolution of 1920×1080 pixels or less, but also contents having a resolution exceeding 1920×1080 pixels and , High-definition content such as HDR video content can be transmitted. Here, the content protection when the receiver re-outputs these high-definition video contents broadcast by the broadcast communication system to the external device through the interface is higher than the content of the SDR video whose resolution is 1920×1080 pixels or less. Content protection is required.

In order to realize this, content protection by DTCP2 (described in Reference 1) which is a content protection system higher than DTCP-IP as an interface transmission technology has been developed.

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

Specifically, four flags (“L2-Only” Flag, “EI” Flag, “HDR” Flag, “SDO” Flag) shown in FIG. 39 are newly prepared in the DTCP 2. For example, if the “L2-Only” Flag of FIG. 39 is “0”, it indicates “any content protection is applicable to either DTCP-IP (L1 level content protection) or DTCP2 (L2 level content protection)”. Yes, if it is “1”, it means that a higher level of content protection than DTCP-IP (L1 level content protection) (for example, L2 level content protection such as DTCP2) is required. Note that DTCP-IP (L1 level content protection) is referred to as "DTCP1" in the following description to distinguish it from "DTCP2". If the “EI” Flag is “0”, it indicates that the content is “Non-Enhanced Image”. If the flag is “1”, the content is “Enhanced Image”. Indicates that. Here, "Enhanced Image" means a color space in which the number of pixels exceeds 1920 x 1080 or a color space exceeding HD level color space (SDR such as BT.709) (for example, HDR such as BT.2020 or SMPTE2084). ) Means a content having a video. Further, "Non-Enhanced Image" refers to an image having a HD image quality or lower (for example, an image having a pixel number of 1920×1080 or less and having an HD level color space (SDR such as BT.709)). Means content that has video. If the “HDR” Flag is “0”, it means “the content of the video that can be converted from HDR to SDR”, and if it is “1”, “HDR to SDR conversion”. Is a prohibited video content.” If the “SDO” Flag is “0”, “In the case of “Enhanced Image”, it cannot be re-output without L2 level content protection, but when converting “Enhanced Image” to “Non-Enhanced Image”. Indicates that it is possible to re-output with L1 level content protection. If it is "1", "L2 level is used regardless of whether the content is "Enhanced Image" or "Non-Enhanced Image". It can be re-output with both content protection and L1 level content protection."

When applying the content protection by the DTCP2 described above to the output of the IP interface of the present embodiment, there is a problem in which flag should be attached to which content as the output control information 50200 in FIG. For example, there may be a way of thinking that flags substantially corresponding to the four flags of FIG. 39 are also prepared on the reception control information 50100 side of FIG. By doing so, it is possible to substantially make the server of the broadcasting station a sink device of DTCP2. However, each of the above 4 flags is 1 bit, and if these flags can be freely set by the intention of the broadcasting station or the production side, if all combinations of the 4 flags are taken into consideration, 2 4 as follows: That is, there are 16 types of content protection states, which is very complicated. It cannot be said that this is not suitable for the "broadcast" technology in which a large number of viewers simultaneously receive and the program start and end are repeated in the selected service. The number of viewers targeted by the "broadcast" technology is enormous, and the monitors and the like possessed by the viewers are also various. For example, if the monitors owned by some of the viewers are not HDR-compatible, it is not possible for the viewers to view the content at all by the content protection control using the flag. I want to avoid it as much as possible. Also, in order to popularize receiving devices, it is necessary for the content transmitted by the "broadcast" technology to have a simple type system and be easy for many viewers to understand.

In addition, if a new flag is prepared for the reception control information 50100, the equipment on the content production side also becomes complicated.

In consideration of the above, in the broadcast communication system of the present embodiment, it is assumed that the flags substantially corresponding to the above four flags of DTCP2 are not directly introduced into the reception control information 50100 of FIG. Then, when the IP interface is output from the broadcast receiving apparatus 40100, the flag of DTCP2 is used as the output control information 50200 to perform more suitable content protection. Specifically, in the broadcast communication system of the present embodiment, as the reception control information 50100, information on the resolution of the video of the content, control information on the digital copy of the content, control information on the storage and output of the content, and the third embodiment, The EOTF identification information (transfer characteristic identification information) described in Section 4 is used, and when the broadcast receiving apparatus 40100 outputs the IP interface, according to these pieces of information, including the addition of the DTCP2 flag, the contents Output protection shall be determined.

Here, the information of the resolution of the image of the content used as one of the reception control information 50100 will be described. As the resolution information of the video of the content, a plurality of types of information are transmitted in the broadcast communication system of this embodiment. The broadcast receiving apparatus 40100 may determine the video resolution (number of pixels) of the content by using any one of these plural types of information. For example, the determination may be made by acquiring the encoding parameter stored in the encoded stream of HEVC which is the video encoding method of the content of the broadcasting system of the present embodiment. Alternatively, the determination may be made by acquiring the coding parameter described in the MH-HEVC video descriptor arranged in the MPT. Alternatively, the image resolution information described in the image component descriptor may be acquired for the determination.

Next, control information relating to a digital copy of content used as one of the reception control information 50100 and control information relating to storage and output of content will be described. FIG. 40 shows the control information regarding the digital copy of the content transmitted in the broadcast communication system of this embodiment and the descriptor regarding the control information regarding the storage and output of the content. Here, the content copy control descriptor stores control information relating to a digital copy of the content, information indicating the maximum transmission rate, and the like. In addition, the content usage control descriptor stores information describing control information regarding storage and output of content. The content copy control descriptor and the content usage control descriptor are arranged in the MPT and transmitted, for example.

FIG. 41A shows an example of the data structure of the content copy control descriptor in the broadcasting system of this 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. Further, FIG. 41B shows an example of the parameter values of the digital copy control information and their meanings. For example, if the parameter is "00", it means "copy without restriction (synonymous with "unlimited copy")", and if the parameter is "01", it can be defined by the operator. If the parameter is “10”, it means “copy only for one generation”, and if the parameter is “11”, it means “copy prohibited”. Only when the above parameter is "00" and "copy is possible without constraint" is indicated, it can be said that the protection by the digital copy control information is not designated. If the parameters are “01”, “10”, and “11”, it can be said that some protection is specified by the digital copy control information.

Further, FIG. 42 shows an example of the data structure of the content usage control descriptor in the broadcasting system of the present embodiment. It is assumed that the “copy_restriction_mode” parameter in the figure is the copy restriction mode and indicates whether or not number-limited copying is possible (corresponding to “copying possible a predetermined number of times” in the first embodiment). The value of the “encryption_mode” parameter of the content usage control descriptor shown in FIG. 42 is used for controlling protection (encryption) when outputting the IP interface. If the value of the "encryption_mode" parameter is "0", indicating that protection is required (encryption required), encryption processing is performed when the content is output, and a value of "1" does not require protection. When it is indicated that (encryption is not required), the content may be output without protection (encryption processing) when output.

The combination of the “digital_recording_control_data” parameter of the content copy control descriptor, the “encryption_mode” parameter of the content usage control descriptor, and the “copy_restriction_mode” parameter of the content usage control descriptor described above is the “copy” described in the first embodiment. 3 is a specific configuration example of "control information".

The broadcast receiving device 40100 of the present embodiment obtains the “digital_recording_control_data” parameter of the content copy control descriptor and the “copy_restriction_mode” parameter of the content usage control descriptor described above to determine the output protection of the content of the IP interface output. It can be used for judgment.

Next, since the details of the EOTF identification information used as one of the reception control information 50100 have already been described in the third and fourth embodiments, the repetitive description will be omitted. Furthermore, the broadcast receiving apparatus 40100 of the present embodiment does not only use the EOTF identification information as the reception control information 50100, but also the presence or absence of the resolution conversion processing of the video of the content in the broadcast receiving apparatus 40100, or the third and fourth embodiments. The output protection of the content of the IP interface output may be determined by using the presence or absence or the result of the transfer characteristic conversion processing or the presence or absence of the content accumulation processing or the state after the accumulation.

[Decision Process of Output Protection of Content of IP Interface Output in Broadcast Reception Device]
43, 44, and 45, an example of the output protection determination processing of the content of the IP interface output in the broadcast receiving apparatus will be shown.
First, FIG. 43 shows that the broadcast receiving apparatus 40100 receives the content together with the reception control information 50100, and determines the output protection of the content when performing the IP interface output without performing the resolution conversion processing or the transfer characteristic conversion processing on the video of the content. This shows the processing.

In FIG. 43, the main control unit 101 of the broadcast receiving apparatus 40100 of the present embodiment determines the output protection of the content when performing the IP interface output based on the information included in the reception control information 50100. Specifically, based on the combination of the “digital_recording_control_data” parameter of the content copy control descriptor, the “encryption_mode” parameter of the content usage control descriptor, the video resolution of the received content, and the transfer characteristic (EOTF) identification information. Determines the output protection of content when performing IP interface output. Hereinafter, a determination example in each combination will be described.

[Figure 43 Combination 1]
In the example of the combination 1 in FIG. 43, the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copyable without constraint”, and the “encryption_mode” parameter of the content usage control descriptor indicates that the IP interface output It indicates that the protection status is “not protected”. That is, in this case, it can be said that the content copy restriction and output protection are not designated by any of the parameters.

In this case, even if the resolution of the video exceeds horizontal 1920×vertical 1080 pixels (either horizontal or vertical exceeds the number of pixels. Hereinafter referred to as “more than 2K content”), horizontal 1920×vertical 1080 pixels or less. When the IP interface output is performed regardless of the content (both horizontal and vertical, the number of pixels is equal to or less than the number of pixels; hereinafter referred to as “content of 2K or less”), the transfer characteristic identification information indicates HDR, or SDR. It is not necessary to protect the output of the content. Copy control at the time of output is also unnecessary (substantially Copy Free), encryption at the time of output is also unnecessary, and of course it is not necessary to add the output control information of DTCP2. However, the content may be output after being protected by DTCP1 (“DTCP-IP” described above) or DTCP2. In that case, the copy control state at the time of output may be set to “Copy Free” and no encryption may be performed. Furthermore, when DTCP2 is protected and output is performed, output control information may be determined as follows. Set "L2-Only" Flag to 0. The “EI” Flag is set to 0 when the content is 2K or less and the transfer characteristic is SDR, and it is set to 1 when the content is other than that. The "HDR" Flag is 0. “SDO” Flag is set to 1. That is, the protection level of the DTCP of the IP interface output may be the L1 level or the L2 level, the copy control is Copy Free, the transfer characteristic conversion is not prohibited, and the L1 level or the L2 level is set regardless of the state of the resolution or the transfer characteristic. In any of the above protection states, the data is output in a state where it can be output again. This means that the protection state is the lowest among the output control states of the IP interface output in this embodiment.

[Fig. 43 Combinations 2 to 5]
In the example of the combinations 2 to 5 in FIG. 43, the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copyable without constraint”, and the “encryption_mode” parameter of the content usage control descriptor indicates the IP interface output. It indicates that the protection status at that time is “protect”.

In this case, since the "encryption_mode" parameter of the content usage control descriptor specifies that protection is performed when the IP interface is output, output protection is performed by either DTCP2 or DTCP1 in any combination. In this case, the copy control state is set to "EPN" indicating that there is no copy restriction but encryption is required, and the encryption protection process is performed. Here, which level of DTCP2 or DTCP1 the output protection processing is to be performed is determined according to the combination of the video resolution of the received content and the transfer characteristic (EOTF) identification information.

For example, in combination 5, the received content has a video resolution of 2K or less, and the transfer characteristic (EOTF) identification information is SDR. Since this is so-called HD image quality content, the conventional level of output protection is sufficient, and output protection using DTCP1 is performed. In this case, of course, the DTCP2 output control information is not added.

Further, in the combinations 2, 3, and 4, the condition that the resolution of the video of the received content is more than 2K content or the transfer characteristic (EOTF) identification information is HDR is satisfied. In this case, since the content has a picture quality exceeding the HD picture quality, the content is protected by using DTCP2, which is a higher level of output protection than DTCP1. In this case, the DTCP2 output control information added to the output content is determined as follows.

Here, regarding the "L2-Only" Flag, the "L2-Only" Flag is set to 0 in any of the combinations 2, 3, and 4. If "L2-Only" Flag is set to 1, even if the device at the output destination performs pixel number conversion or transfer characteristic conversion processing to reduce the image quality to HD image quality, L2 level content protection such as DTCP2 is performed. If it is not output again. There is a possibility that viewing may not be possible depending on the device owned by the viewer (such as when the device owned by the viewer does not support DTCP2). Not desirable for protection. The above is the reason for setting “L2-Only” Flag to 0. For the same reason, the "L2-Only" Flag is set to 0 in principle for determining the output control information of the DTCP2 in any of the following explanations of this embodiment. However, as a modified example, when the broadcast content or broadcast service is divided into “free broadcast” and “paid broadcast”, and this can be identified by the broadcast receiving device 40100, “L2-Only” for “free broadcast”. Flag may be 0 and “L2-Only” Flag may be 1 for “paid broadcasting”. This is because the viewers of "paid broadcasting" are limited and a particularly high protection level is required for "paid broadcasting" contents.

Further, regarding the “EI” Flag, the “EI” Flag is set to 1 in any of the combinations 2, 3, and 4. This is because the condition that either the resolution of the image of the received content is more than 2K or the transfer characteristic (EOTF) identification information is HDR is satisfied.

As for the “HDR” Flag, in the combinations 2 and 3, the “HDR” Flag is 0. In these combinations, the transfer characteristic (EOTF) identification information is HDR, and when output as it is, the transfer characteristic of the content when the IP interface is output is also HDR. Here, if the "HDR" Flag is set to 1, it becomes impossible to perform transfer characteristic conversion processing on the output destination device and convert it to SDR content. In this case, viewing may be impossible depending on the device owned by the viewer (such as when the device owned by the viewer does not support HDR content). This situation is not desirable as protection for "broadcast" content that is received by many viewers simultaneously. The above is the reason for setting “HDR” Flag to 0. For the same reason, the "HDR" Flag is set to 0 in principle in determining the output control information of the DTCP2 in any of the following explanations of this embodiment. However, as a modified example, if the broadcast content or broadcast service is divided into “free broadcast” and “paid broadcast” and this can be identified by the broadcast receiving device 40100, “HDR” Flag is set for “free broadcast”. The value "0" and "HDR" Flag may be set to "1" for "paid broadcasting". This is because the viewers of “paid broadcasting” are limited, and there are service providers who think that it is worth watching the content of “paid broadcasting” with high image quality HDR.

Regarding the “HDR” Flag, in the combination 4, the transfer characteristic (EOTF) identification information is SDR, and when output as it is, the transfer characteristic of the content when the IP interface is output is also SDR. Therefore, it is not necessary to add the “HDR” Flag indicating whether or not the transfer characteristic conversion processing of HDR content to SDR is possible.

Also, regarding the “SDO” Flag, the “SDO” Flag is set to 0 in any of the combinations 2, 3, and 4. As the "encryption_mode" parameter of the content usage control descriptor specifies the protection at the time of outputting the IP interface, it is desirable that the content having a resolution of more than 2K or the content having the transfer characteristic HDR be protected at a high protection level. On the other hand, in "broadcasting" technology, which is premised on the simultaneous reception by many viewers, we want to avoid situations where some viewers who use devices that do not support L2 level content protection cannot view the content at all. .. Here, if "SDO" Flag is set to 0, content with resolution higher than 2K and content with transfer characteristic HDR can be protected at a high L2 level, while content is converted by resolution conversion processing and transfer characteristic conversion processing. When the image quality is reduced to HD, the conventional DTCP-IP level (L1 level) content protection with many compatible devices is allowed, so this type of protection required for the output protection of the content received by the "broadcast" technology is required. Highly consistent with one requirement. The above is the reason why the "SDO" Flag is set to 0. In determining the output control information of DTCP2 in any of the following description of the present embodiment, copy restriction and content output protection are performed by the "digital_recording_control_data" parameter of the content copy control descriptor and the "encryption_mode" parameter of the content use control descriptor. If specified, or if the content storage status indicates copy restriction or content output protection, set the "SDO" Flag to 0 for the same reason.

[Fig. 43 Combinations 6 to 9]
In the examples of the combinations 6 to 9 in FIG. 43, the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copying is possible only for one generation”. In this case, since the copy restriction is specified, it is desirable to protect the content even when the IP interface is output, regardless of the value of the “encryption_mode” parameter of the content usage control descriptor. Therefore, output protection by either DTCP2 or DTCP1 is performed. In this case, the copy control state is set to “Copy One Generation” indicating that only one generation can be copied, and encryption protection processing is performed.

Here, regarding (1) which level of output protection processing of DTCP2 or DTCP1 is performed and (2) determination of output control information when output protection processing is performed by DTCP2, It is determined according to the combination of the resolution and the transfer characteristic (EOTF) identification information. However, the determination method for the combinations 6, 7, 8, and 9 in FIG. 43 is the same as that for the combinations 2, 3, 4, and 5 in FIG.

[Fig. 43 Combinations 10 to 13]
In the example of the combinations 10 to 13 in FIG. 43, the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copy prohibited”. In this case, since the copy restriction is specified, it is desirable to protect the content even when the IP interface is output, regardless of the value of the “encryption_mode” parameter of the content usage control descriptor. Therefore, output protection by either DTCP2 or DTCP1 is performed. In this case, the copy control state is set to “Copy Never” indicating that copying is prohibited, and encryption protection processing is performed.

Here, regarding (1) which level of output protection processing of DTCP2 or DTCP1 is performed and (2) determination of output control information when output protection processing is performed by DTCP2, It is determined according to the combination of the resolution and the transfer characteristic (EOTF) identification information. However, these determination methods in the combinations 10, 11, 12, and 13 in FIG. 43 are the same as those in the combinations 2, 3, 4, and 5 in FIG.

According to the content output protection determination processing in the case of performing the IP interface output of FIG. 43 described above, the content is received together with the reception control information 50100, and the resolution conversion processing and the transfer characteristic conversion processing are not performed on the video of the content. When the IP interface output is performed, it is possible to realize a well-balanced content output protection from the viewpoints of both the output protection for the image quality of the content and the convenience of the viewer of the broadcast content.

Next, in FIG. 44, when the broadcast receiving apparatus 40100 receives the content together with the reception control information 50100, and performs resolution conversion processing and transfer characteristic conversion processing on the video of the content to perform IP interface output determination of content output protection. This shows the processing.
In the example of FIG. 44, the broadcast receiving device 40100 of the present embodiment performs resolution conversion processing and/or transfer characteristic conversion processing on the video of the received content. The resolution conversion process may be performed here by providing a resolution processing unit between the video decoder 141 and the video color gamut conversion unit 142 of the broadcast receiving device 40100 of FIG. 35A. The transfer characteristic conversion process may be executed by the video color gamut conversion unit 142 as already described in the third and fourth embodiments.

Here, in the example of FIG. 44, the resolution conversion processing and/or the transfer characteristic conversion processing of the video of the content is performed before performing the IP interface output. Therefore, it is appropriate to use only the information included in the reception control information 50100. Cannot decide the output protection of various contents.

Therefore, in addition to the information included in the reception control information 50100, the resolution of the video after the resolution conversion processing and/or the transfer characteristic after the transfer characteristic conversion processing are also taken into consideration to determine the output protection of the content when performing the IP interface output. To perform. Specifically, in place of "video resolution" of "reception control information" in FIG. 43, an item "video resolution at output" of "state at output" is provided, and "transfer characteristic identification information" of "reception control information" is provided. In place of (ETOF), an item of “transmission characteristic at output” of “state at output” is provided. Here, the main control unit 101 of the reception control information 50100 determines the “output resolution” of the “output state” and the “transfer characteristic of the output” of the “output state” based on the following determinations.

First, when the broadcast receiving apparatus 40100 of the present embodiment performs the resolution conversion process on the received content image and does not perform the transfer characteristic conversion process, the resolution of the image after the resolution conversion process is set to “in output state”. It may be determined that "the image resolution at the time of output", and that the transfer characteristic indicated by the "transfer characteristic identification information (ETOF)" of the "reception control information" is the "transfer characteristic at the time of output".

Further, when the broadcast receiving apparatus 40100 of the present embodiment performs the transfer characteristic conversion processing on the video of the received content without performing the resolution conversion processing, the “video resolution” of the “reception control information” is set to the “output state”. It is only necessary to determine "the image resolution at the time of output" and the transfer characteristic after the transfer characteristic conversion process is determined as the "transfer characteristic at the time of output" of the "state at the time of output".

Further, when the broadcast receiving apparatus 40100 of the present embodiment performs both the resolution conversion processing and the transfer characteristic conversion processing on the video of the received content, the resolution of the video after the resolution conversion processing is “output state” “output state”. It is only necessary to determine "time image resolution" and to determine the transfer characteristic after the transfer characteristic conversion process as the "output transfer characteristic" of the "output state".

In the example of FIG. 44, the broadcast receiving apparatus 40100 of the present embodiment uses the “output-time video resolution” of the “output-time state” and the “output-time transfer characteristic” of the “output-time state” determined by the above-described determination. 44, a content output protection determination process is performed when the IP interface output shown in FIG. However, in FIG. 43 already described, the “video resolution” of the “reception control information” is replaced with the “video resolution at the output” of the “output state”, and the “transfer characteristic identification information (ETOF)” of the “reception control information” is replaced. When is replaced with “transmission characteristic at output” of “output state”, the same control as in the example of FIG. 44 is performed. Therefore, the “digital_recording_control_data” parameter of the content copy control descriptor of the “reception control information” and the “encryption_mode” parameter of the content usage control descriptor of the “reception control information” of FIG. The IP interface output control in each of the combinations 1 to 13 of the "transfer characteristics" is performed by using the "digital_recording_control_data" parameter of the content copy control descriptor and the "encryption_mode" parameter of the content use control descriptor of the "reception control information" of FIG. This is the same as the IP interface output control in each of the combinations 1 to 13 of "Video resolution" and "Transmission characteristic identification information (ETOF)", and therefore the repetitive description will be omitted.

According to the content output protection determination processing in the case of performing the IP interface output of FIG. 44 described above, the content is received together with the reception control information 50100, and the resolution conversion processing and/or the transfer characteristic conversion processing is performed on the video of the content. When the IP interface output is performed by using the IP interface output, it is possible to realize a well-balanced content output protection in terms of both the output protection for the image quality of the content video and the convenience of the viewer of the broadcast content.

Next, FIG. 45 shows a process of determining the output protection of the content when the broadcast receiving device 40100 receives the content together with the reception control information 50100, performs the storage process on the content, and then performs the IP interface output. is there. Since the outline of the accumulation processing has already been described in the first embodiment, the description will not be repeated.

First, the broadcast receiving device 40100 uses the “digital_recording_control_data” parameter of the content copy control descriptor, the “encryption_mode” parameter of the content usage control descriptor, and the “copy_restriction_mode” parameter of the content usage control descriptor included in the reception control information 50100. The storage control state of the storage target content is determined.

Here, in the case where the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copy is possible without constraint condition” and the “encryption_mode” parameter of the content usage control descriptor indicates “not protected” (in the combination 1 of FIG. 45, In the example), regardless of the value of the “copy_restriction_mode” parameter of the content usage control descriptor, the storage control state is “storage without copy restriction and no encryption_mode protection”.

Further, in the case where the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copyable without constraint condition” and the “encryption_mode” parameter of the content usage control descriptor indicates “protect” (combination 2 to 5 in FIG. 45). In the example), regardless of the value of the “copy_restriction_mode” parameter of the content usage control descriptor, the storage control state is “storage without copy restriction and encryption_mode protected”.

Further, when the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copy only for one generation” and the “copy_restriction_mode” parameter of the content usage control descriptor indicates “copy only for one generation” (combination 6 in FIG. 45). 9 to 9), regardless of the value of the "encryption_mode" parameter of the content usage control descriptor, a storage control state of "recopy prohibited" is set.

Further, when the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copy only for one generation”, and the “copy_restriction_mode” parameter of the content usage control descriptor indicates that “copy with limited number of copies” can be operated (in FIG. 45). The combinations 10 to 13) enable the storage control state of "copying with limited number" regardless of the value of the "encryption_mode" parameter of the content usage control descriptor.

Further, when the “digital_recording_control_data” parameter of the content copy control descriptor indicates “copy prohibited” (examples of combinations 14 to 17 in FIG. 45), the state in which the content can be stored is “digital_recording_control_data” of the content copy control descriptor. ) Whichever value the parameter and the "copy_restriction_mode" of the content usage control descriptor indicate, the storage control state is "temporary storage". The outline of “temporary storage” has already been described in the first embodiment, and thus the description thereof will be omitted.

As described above, the broadcast receiving device 40100 has the “digital_recording_control_data” parameter of the content copy control descriptor and the “encryption_mode” parameter of the content usage control descriptor and the “copy_restriction_mode” parameter of the content usage control descriptor included in the reception control information 50100. And are used to determine the storage control state of the storage target content.

Next, when the broadcast receiving apparatus 40100 outputs the stored content from the IP interface, the storage control state of the content, the “output video resolution” and the “transfer characteristic at the output” when the content is output. Output protection of the content of the IP interface output is determined. Here, in the example of FIG. 45, resolution conversion processing and/or transfer characteristic conversion processing may be performed on the video of the content before and after the content storage processing. This is common with the example of FIG. 44 in that the resolution conversion processing and/or the transfer characteristic conversion processing may be performed before the broadcast receiving device 40100 receives the content and outputs it from the IP interface. Therefore, the determination of the “video resolution at output” and the “transfer characteristic at output” in the broadcast receiving device 40100 may be performed in the same manner as in the example of FIG.

Next, the determination of the output protection of the content when performing the IP interface output in each combination of FIG. 45 will be described.

[Fig. 45 Combination 1]
In the example of the combination 1 shown in FIG. 45, that is, in the case of outputting the content in the storage control state of “storage without copy limitation and no encryption_mode protection”, the same content as the combination 1 of FIG. 44 is output. Output control may be performed. Since it will be repeated, the description will not be repeated.

[Fig. 45 Combinations 2 to 5]
For example, in the case of combinations 2 to 5 shown in FIG. 45, that is, in the case of outputting the contents in the storage control state of “storage without copy restriction and protection of encryption_mode” by the IP interface, the combinations 2 to 5 in FIG. Output control of similar contents may be performed. Since it will be repeated, the description will not be repeated.

[Fig. 45 Combinations 6 to 9]
In the case of the combinations 6 to 9 shown in FIG. 45, that is, when the content in the storage control state of “recopy prohibited” is output through the IP interface, the output process is a viewing output for viewing on the output destination device. Or the content is moved to the output destination device, the copy control state at the time of output differs. Specifically, when the IP interface output is a viewing output, the copy control state is output as "No More Copies" indicating prohibition of recopying. If the IP interface output is move, the copy control status is output as "Move". In each of the combinations 6, 7, 8 and 9 shown in FIG. 45, the other content protection control in the IP interface output is the same as each of the combinations 6, 7, 8 and 9 shown in FIG. The description will not be repeated.

[Fig. 45 Combinations 10 to 13]
Each example of the combinations 10, 11, 12, and 13 in FIG. 45, that is, the content protection control in the case of outputting the content in the storage control state of “quantity limited copy allowed” through the IP interface, is shown in the combinations 6, 7, and 8 in FIG. , 9 are almost the same as the respective examples. The differences are as follows. When the content whose storage control status is “recopy prohibited” is output via the IP interface, it is necessary to render the content unreproducible in the broadcast receiving apparatus 40100 when the move process is performed once (until the content is rendered unreproducible). You can output for viewing as many times as you like). On the other hand, when the storage control state is “copy with limited number of copies allowed”, the copying process can be performed a plurality of times and finally the moving process can be performed once for the output destination device via the IP interface output. For example, as an example, the copy process can be performed 9 times, and finally the move process can be performed once. At the time of the last move processing, it is necessary to make the content unreproducible in the broadcast receiving device 40100. Here, the broadcast receiving apparatus 40100 treats each of the copy processes of several times as the copy process, and each content of the copy process is in the copy control state in the protection process of the IP interface output. Output as "Move".
That is, in the content copy process of the storage control state “copying with limited number”, the broadcast receiving apparatus 40100 virtually sets a state in which a plurality of the contents are stored in advance, and one of the plurality of stored contents is set. One of them is executed as a process of moving via the IP interface output. Here, if a plurality of the same contents are actually stored in advance, the storage state becomes inefficient with respect to the capacity of the storage unit. Therefore, in practice, only one content may be stored, and the stored number information may be stored as management information in the storage unit or the memory unit for management. This is the meaning of the above description "virtually".

Other than the points described above, the content protection control in the case of outputting the IP interface in the example of combinations 10, 11, 12, and 13 in FIG. 45 is the same as the respective examples of combinations 6, 7, 8, and 9 in FIG. Therefore, the description will not be repeated.

[FIG. 45 Combination 14 to 17]
Each example of combinations 14, 15, 16 and 17 in FIG. 45, that is, content protection control in the case of outputting the content in the storage control state of “temporary storage” through the IP interface is shown in combinations 6, 7, 8 and 9 in FIG. Is almost the same as each example. The difference is that the content in the storage control state “temporary storage” cannot be moved to another device (move is impossible). The content protection control in the case of outputting the IP interface for the other points is the same as that of each of the combinations 6, 7, 8 and 9 in FIG.

According to the content output protection determination processing in the case of performing the IP interface output in FIG. 45 described above, when the content is received together with the reception control information 50100, the content is accumulated, and the IP interface output is performed, the content is protected. Content output protection with a good balance can be realized both from the viewpoint of output protection with respect to the image quality of video and from the viewpoint of convenience for viewers of broadcast content.

As described above, according to the broadcast communication system and the broadcast receiving apparatus 40100 of the present embodiment, the control information regarding the digital copy of the content, the control information regarding the storage and output of the content, or the storage state of the content, the resolution of the video of the content, and the content It is possible to perform content output protection control that is well-balanced in terms of both output protection with respect to image quality of the content and convenience of the viewer of the broadcast content, depending on the transfer characteristics of the video and the like. That is, according to the broadcast communication system and the broadcast receiving apparatus 40100 of the present embodiment, it is possible to perform more suitable content output protection control.

Although the example of the embodiment of the present invention has been described with reference to Examples 1 to 5, the configuration for realizing the technique of the present invention is not limited to the above-described example, and 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. All of these belong to the category of the present invention. Also, the numerical values, messages, etc. appearing in the text and in the drawings are merely examples, and the use of different values does not impair the effects of the present invention.

The functions and the like of the present invention described above may be realized in hardware by designing a part or all of them with, for example, an integrated circuit. Alternatively, the microprocessor unit or the like may be realized by software by interpreting and executing an operation program for realizing 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 the ROM 103 and/or the storage (storage) unit 110 of the broadcast receiving apparatus 100 in advance at the time of product shipment. It may be obtained from another application server 500 or the like on the Internet 200 via the LAN communication unit 121 after the product is shipped. Further, the software stored in a memory card, an optical disc, or the like may be acquired via the expansion interface unit 124 or the like.

Further, the control lines and information lines shown in the drawing are those considered to be necessary for explanation, and not all control lines and information lines on the product are necessarily shown. In practice, it may be considered that almost all configurations are connected to each other.

100, 800, 40100... Broadcast receiver, 100a, 40100a... Antenna, 101, 801,... Main control unit, 102, 802... System bus, 103, 803... ROM, 104, 804... RAM, 110, 810... Storage unit, 121, 821... LAN communication unit, 124, 824... Expansion interface unit, 125, 825, 40125... 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 Reference numeral 154... Browser unit, 155... Application color gamut conversion unit, 156... Sound source unit, 161, 861... Video synthesis unit, 162, 862... Monitor unit, 163, 863... Video output unit, 164, 864... Voice synthesis unit, 165, 865... Speaker section, 166, 866... Audio output section, 170, 870... Operation input section, 40181... Transcode processing section, 841... MMT decoding processing section, 842... MPEG2-TS decoding processing section, 200... Internet, 200r... Router device, 200a... Access point, 300t... Radio tower, 300s... Broadcast satellite (or communication satellite), 300... Broadcast station server, 390c... Imaging device, 390e... Editing device, 400... Service provider server, 500... Other application server, 600... Mobile telephone communication server, 600b... Base station, 700... Personal digital assistant, 40200... Connection cable, 40300... Monitor device.

Claims (1)

A method of protecting content in the receiving device of a transmission system, wherein the content of a broadcast program is transmitted from a broadcasting station side, and the content is received by the receiving device .
The transmission system broadcasts control information corresponding to the L2-Only flag of DTCP2, control information corresponding to the EI flag of DTCP2, control information corresponding to the HDR flag of DTCP2, and control information corresponding to the SDO flag of DTCP2. It is not transmitted from the station side to the receiving device,
A receiving step in which the receiving device receives the content of the broadcast program from the broadcast station side;
A storing step of storing the content received in the receiving step,
An output step in which the content stored in the storage step is protected and output by DTCP2 via an interface of the receiving device;
In the transmission system, the receiving device controls the control information corresponding to the L2-Only flag of DTCP2, the control information corresponding to the EI flag of DTCP2, the control information corresponding to the HDR flag of DTCP2, and the control corresponding to the SDO flag of DTCP2. A receiving device that does not acquire any of the information,
In the output step, with respect to the content stored in the storage step, a 1-bit L2-Only flag, an EI flag, an HDR flag, and an SDO flag, which are control information of DTCP2, are set, and the content of DTCP2 is set via the interface. When protecting and outputting, the L2-Only flag is fixed to 0, and the HDR flag is fixed to 0, The content protection method characterized by the above-mentioned.

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