JP2016111466A - Receiving device, broadcasting system, reception method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a viewer with a video obtained by utilizing the high resolution and a screen size originally provided to a digital television receiver.SOLUTION: A receiving device 31 comprises a controller 331 which, when it is detected that a received broadcast is a hierarchical service, generates a first program video or a video obtained by combining a second program video and a video that is not a program video. When it is detected that the received broadcast is a hierarchical service, the controller 331, in response to a received signal level, generates only the first program video or the video obtained by combining the second program video and the video that is not a program video.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a receiving device, a broadcasting system, a receiving method, and a program.

Broadcasting of TV programs by a next-generation television broadcasting service such as 4K / 8K UHDTV (Ultra High Definition Television; hereinafter referred to as 4K / 8K) is scheduled. Among television broadcasting services, especially broadcasts using satellite broadcasting systems may interfere with normal reception of TV programs due to the fact that the broadcast waves are attenuated by rain (rain attenuation). There is a drawback.
Therefore, a television broadcasting station can simultaneously transmit conventional video (video with lower resolution than 4K / 8K video and strong resistance to rain attenuation) together with 4K / 8K video as a measure against rain attenuation. It is possible to introduce. Thereby, the viewer can continue watching the television program by switching to the conventional video even when the rain is attenuated.
In Non-Patent Document 1 and Non-Patent Document 2, in satellite digital broadcasting, the standard is to continue the service by switching the hierarchical transmission method with respect to interruption during rain. Non-Patent Document 3 describes a standard for a media transport system using MMT.

Radio Industries Association of Japan, “ARIB STD-B21 5.5 Edition Digital Broadcasting Receiver Standard (Preferred Specifications)”, Japan Radio Industries Association Japan Radio Industry Association, “ARIB TR-B15 6.5 edition (third volume) BS / broadband CS digital broadcasting operation rules”, Japan Radio Industry Association The Japan Radio Industry Association, “ARIB STD-B60 1.0 Edition, Media Transport System Standard by MMT in Digital Broadcasting”, The Japan Radio Industry Association

  In a digital broadcasting television receiver that has two hierarchical services in the same channel, when the modulation method of the video to be displayed is switched from a high hierarchy to a low hierarchy due to deterioration of weather, etc., the display area is reduced and the video is reduced. Is made clearer than in the normal mode, a useless blank space is generated on the screen. In other words, the conventional technique has a problem that the high resolution and the size of the screen originally provided in the digital television receiver cannot be fully utilized.

  The present invention has been made in view of the above points. When the broadcast video to be displayed is switched from a video with a high resolution to a video with a low resolution, the reception device of the present invention has a broadcast video with a low resolution and various other types. Generate video combined with video. That is, a video other than the broadcast video is displayed in a blank space on the screen generated by displaying a broadcast video with a low resolution. As a result, the display area is effectively utilized so that the image is displayed on the entire screen while maintaining the sharpness of the image quality even when the rainfall is attenuated. Provided are a receiving device, a broadcasting system, a receiving method, and a program capable of providing a viewer with an image utilizing the size.

  (1) The present invention has been made to solve the above problems, and one aspect of the present invention includes a reception level detection unit and a first program video, or a second program video and a program video other than the program video. A control unit that generates a video combined with the video, and based on the detection output of the reception level detection unit, the control unit generates the first program video or the second This is a receiving device that generates a video that combines the program video and video other than the program video.

  (2) One embodiment of the present invention is the receiving device according to (1), wherein the control unit determines an image to be generated based on input content from a user.

  (3) Moreover, one aspect of the present invention is the receiving device according to (1) or (2), in which the control unit combines the second program video and a video other than the program video. When generating a video, a video other than the program video is generated based on data acquired via a communication network other than broadcasting.

  (4) Moreover, one aspect of the present invention is the receiving device according to (1) or (2), in which the control unit combines the second program video and a video other than the program video. When the video is generated, a video that combines the second program video and a video other than the program video is generated by activating a broadcast communication cooperation service.

  (5) According to another aspect of the present invention, there is provided a broadcasting system including a transmitting device that transmits data and a receiving device that receives the data. And a control unit that generates a first program video or a video that combines the second program video and a video other than the program video, and When the unit detects the hierarchical service, the control unit generates only the first program video or generates a video combining the second program video and a video other than the program video. , A broadcasting system.

  (6) Further, according to one embodiment of the present invention, a detection process for detecting that a received broadcast is a hierarchical service, and a first program video or a second program video and a video other than the program video are combined. A control process for generating the first program video when the detection process detects that the service is a hierarchical service, or the control program generates only the first program video. And a video other than the program video are generated.

  (7) In addition, according to one embodiment of the present invention, a detection procedure for detecting that a received broadcast is a hierarchical service and a first program video or a video other than the second program video and the program video are received by the computer of the reception device. And a control procedure for generating a combined video, and when detecting that the detection procedure is the hierarchical service, the control procedure generates only the first program video, or It is a program for executing a procedure for generating a video in which a second program video and a video other than the program video are combined.

  ADVANTAGE OF THE INVENTION According to this invention, the image | video which utilized the high resolution and the screen size which a digital television receiver originally has can be provided to a viewer.

It is the schematic which shows an example of the broadcast system which concerns on this embodiment. It is a block diagram which shows the structure of the transmitter which concerns on this embodiment. It is a figure which shows an example of the data structure of MPT contained in the structure information which the receiver which concerns on this embodiment receives. It is a figure which shows an example of the data structure of the asset group descriptor (Asset_Group_Descriptor ()) contained in the structure information which the receiver which concerns on this embodiment receives. It is a figure which shows an example of the data structure of the image | video component descriptor (Video_Component_Descriptor ()) contained in the structure information which the receiver which concerns on this embodiment receives. It is a figure which shows an example of the value of the video signal resolution (video_resolution) contained in the structure information which the receiver which concerns on this embodiment receives. It is a figure which shows an example of the value of the video signal aspect ratio (video_aspect_ratio) contained in the structure information which the receiver which concerns on this embodiment receives. It is a figure which shows an example of the value of the video signal frame rate (video_frame_rate) contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the data structure of the location information (MMT_general_location_info ()) included in the configuration information received by the receiving apparatus according to the present embodiment. It is a block diagram which shows the structure of the server apparatus which concerns on this embodiment. It is a block diagram which shows the structure of the receiver which concerns on this embodiment. It is a block diagram which shows the structure of the control part which concerns on this embodiment. It is the schematic which shows an example of the image | video which superimposed the image | video (GUI screen) based on communication content on the image | video of the broadcast program based on this embodiment. It is a flowchart which shows operation | movement of the receiver which concerns on the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the receiver which concerns on the 2nd Embodiment of this invention. It is a figure which shows an example of the data structure of MH-AIT contained in the structure information which the receiver concerning this embodiment receives. It is a figure which shows an example of the value of the application format (application_type) contained in the structure information which the receiver which concerns on this embodiment receives. It is a figure which shows an example of the value of the application control code (application_control_code) contained in the structure information which the receiver which concerns on this embodiment receives. It is a flowchart which shows operation | movement of the receiver which concerns on the 3rd Embodiment of this invention.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram illustrating an example of a broadcasting system according to the present embodiment.
The broadcast system 1 according to the first embodiment includes a transmission device 11, a server device 21, and a reception device 31. The transmission device 11 and the server device 21 constitute a broadcasting facility possessed by a broadcasting company. The reception device 31 receives a broadcast program broadcast from the transmission device 11, displays a video of the received broadcast program, and reproduces the sound of the broadcast program. In addition, the receiving device 31 is connected to the server device 21 to transmit and receive data. The receiving device 31 is installed in each home or business office.

The transmission device 11 sequentially transmits broadcast program data (program data) to the reception device 31 via the broadcast transmission path 12. The transmission device 11 is a radio wave transmission base station including, for example, a radio tower for a broadcaster or the like to transmit a broadcast wave.
The broadcast transmission path 12 is a transmission path for unidirectionally transmitting various data transmitted by the transmission apparatus 11 to an unspecified number of reception apparatuses 31 simultaneously. The broadcast transmission path 12 is, for example, a radio wave (broadcast wave) in a predetermined frequency band that is relayed by the broadcast satellite 13. The broadcast transmission path 12 can include a terrestrial broadcast transmission path. A part of the broadcast transmission path 12 may include a communication line, for example, a communication line from the transmission device 11 to a transmission facility for transmitting radio waves. Note that transmitting (or receiving) various data via the broadcast transmission path 12 may be referred to as “transmitting (or receiving or downloading) by broadcasting”.

  The server device 21 is a server device that stores communication content created by a broadcaster, content service provider, Internet content producer, or the like. The server device 21 is a server device installed in a WWW (World Wide Web) server accommodation facility such as an iDC (Internet Data Center). The location of the server device 21 is notified to the receiving device 31 via the broadcast transmission path 12 by, for example, a URL (Uniform Resource Locator). When receiving the communication content request signal from the receiving device 31, the server device 21 transmits the requested communication content to the receiving device 31.

  The communication transmission path 22 is a transmission path for bidirectionally transmitting various data between the server device 21 and the receiving device 31. The communication transmission path 22 includes, for example, a wide area communication network such as the Internet having a wired large-capacity backbone network. The communication transmission path 22 may be a communication network including a wireless access network in part, for example, a public wireless communication network. Note that transmitting various data via the communication transmission path 22 may be referred to as “transmitting (receiving or downloading) by communication”.

The reception device 31 activates a CAS program for decoding data received from the transmission device 11 via the broadcast transmission path 12, and decodes the received data by executing the activated CAS program.
The reception device 31 receives broadcast content from the transmission device 11 and communication content from the server device 21. The receiving device 31 has a function for connecting to the communication transmission path 22 via a wireless LAN connection with a wired LAN cable or a Wi-Fi router (Wireless Fidelity router; wireless LAN base unit). The receiving device 31 is, for example, a television receiving device, a video recording device, or the like.

(Configuration of transmitter)
Next, the configuration of the transmission device 11 according to the present embodiment will be described.
FIG. 2 is a block diagram showing the configuration of the transmission apparatus according to this embodiment. The transmission apparatus 11 includes a program data generation unit 111, a configuration information generation unit 112, a multiplexing unit 113, an encryption unit 114, and a transmission unit 115.

The program data generation unit 111 acquires video data indicating video configuring a broadcast program and audio data indicating sound configuring a broadcast program.
The program data generation unit 111 acquires video data encoded by a predetermined video encoding method. The predetermined video encoding method is, for example, ISO / IEC 23008 HEVC (International Organization for Standardization / International Electronic Commission 230308 Part2 High Efficiency Video Standard), which is simply referred to as “High Coding C”.
In addition, the program data generation unit 111 acquires audio data encoded by a predetermined audio encoding method. The predetermined audio encoding method is, for example, an audio encoding method defined by ISO / IEC 14496 Part 3 (also simply referred to as MPEG-4 audio. MPEG is an abbreviation for Moving Picture Experts Group). is there.

  The program data generation unit 111 generates program data in a predetermined format from the acquired video data and audio data, and outputs the generated program data to the multiplexing unit 113. Program data in a predetermined format is, for example, MPU (Media Processing Unit) defined by ISO / IEC 23008 Part1 MMT (MPEG Media Transport, also simply referred to as MMT). Each MPU includes video data or audio data of a unit that can perform video and audio decoding processing.

The configuration information generation unit 112 acquires component element information that is information for configuring a broadcast program and a service provided along with the broadcast. The component information includes a list of assets that are components of broadcast programs and services, that is, video, audio, and the like, and information indicating their requirements.
For example, as a countermeasure against the attenuation of broadcast waves due to rain, there is a rain corresponding broadcast by a hierarchical transmission method. This is to transmit a sub-broadcast (broadcast corresponding to rain) of the same program as the main broadcast with a lower resolution and sound quality at the same time as the main broadcast by the hierarchical transmission method.
For example, in the case of transmitting a plurality of broadcast videos at the same time, such as when broadcasting by a hierarchical transmission method, the above-described component element information is related to information about the resolution of each video and the priority with which each video is displayed. Information and the like are also included in the component information.

  The configuration information generation unit 112 generates configuration information in a predetermined format from the acquired component element information, and outputs the generated configuration information to the multiplexing unit 113. The configuration information in the predetermined format is, for example, an MPT (MMT Package Table) that constitutes an MMT-SI (MMT-System Information). An example of MPT will be described later.

  The multiplexing unit 113 multiplexes the program data input from the program data generation unit 111 and the configuration information input from the configuration information generation unit 112, and has a predetermined format (for example, a TLV (Type Length Value) packet). Generate multiplexed data. The multiplexing unit 113 outputs the generated multiplexed data to the encryption unit 114.

  The encryption unit 114 encrypts the multiplexed data input from the multiplexing unit 113 using a predetermined encryption method (for example, AES (Advanced Encryption Standard) or MULTI2). The encryption unit 114 outputs the encrypted multiplexed data to the transmission unit 115.

  The transmission unit 115 transmits the multiplexed data input from the encryption unit 114 to the reception device 31 via the broadcast transmission path 12. Here, the transmission unit 115 modulates a carrier wave having a predetermined carrier frequency with multiplexed data that is a baseband signal, and uses a antenna (not shown) to transmit a radio wave (broadcast wave) in a channel band corresponding to the carrier frequency. Radiate.

(MPT data structure)
Next, an example of MPT included in the configuration information will be described. Note that MPT is a standard defined in Non-Patent Document 3 by ARIB (Association of Radio Industries and Businesses).
FIG. 3 is a diagram illustrating an example of a data structure of MPT received by the receiving apparatus of the present invention. In the example illustrated in FIG. 3, the MPT includes an asset type (asset_type) and an asset descriptor area (asset_descriptors_byte) for each asset.

In the asset type (asset_type), a code indicating the type of asset is described. The configuration information generation unit 112 describes, for example, hcv1 indicating video data encoded by HEVC and mp4a indicating audio data encoded by MPEG-4 audio as the asset type (asset_type).
The asset descriptor area (asset_descriptors_byte) is an area where an asset descriptor is described.

  Note that “uimsbf” in the “data notation” column of FIG. 3 is an abbreviation for “unsigned integrated most significant bit first”, and means an unsigned integer with the most significant bit as the head. Also, bslbf is an abbreviation for bit string left bit first, and means a bit string whose left bit is the head. Further, char is an abbreviation for character and means a fixed-length data type used mainly for storing character codes.

  In the case where broadcasting by the hierarchical transmission method is provided, the configuration information generation unit 112 (FIG. 2), for each hierarchical transmission method, the asset group descriptor (Asset_Group_Descriptor ()) and the video component descriptor (Video_Component_Descriptor ()). Is generated.

  The asset group descriptor (Asset_Group_Descriptor ()) is a descriptor in which parameters relating to asset group relationships and priorities within groups are described. For example, in broadcasting using a hierarchical transmission method, the configuration information generation unit 112 generates an asset group descriptor (Asset_Group_Descriptor ()), and uses the generated asset group descriptor (Asset_Group_Descriptor ()) as an asset descriptor area (asset_descriptors_byte). Include in In the case where broadcasting using the hierarchical transmission method is not performed, when the information regarding the asset group relationship and the priority within the group is not required, the configuration information generation unit 112 sets the asset group descriptor (Asset_Group_Descriptor ()). Is not generated.

  The video component descriptor (Video_Component_Descriptor ()) is a descriptor in which parameters related to the video component are described. For example, in broadcasting using a hierarchical transmission method, the configuration information generation unit 112 generates a video component descriptor (Video_Component_Descriptor ()), and uses the generated video component descriptor (Video_Component_Descriptor ()) as an asset descriptor area (asset_descriptors_byte). Include in

  As described above, the asset group descriptor (Asset_Group_Descriptor ()) and the video component descriptor (Video_Component_Descriptor ()) are generated for each broadcast asset by the hierarchical transmission method.

(Data structure of asset group descriptor)
Next, an example of an asset group descriptor (Asset_Group_Descriptor ()) will be described. The asset group descriptor (Asset_Group_Descriptor ()) is a standard specified by ARIB (Radio Industry Association) in Non-Patent Document 3.
FIG. 4 is a diagram illustrating an example of a data structure of an asset group descriptor (Asset_Group_Descriptor ()) received by the receiving device of the present invention. The asset group descriptor (Asset_Group_Descriptor ()) includes a group ID (group_identification) and a selection level (selection_level).

The group ID (group_identification) is identification information of a group to which the asset belongs. A group is a set of assets that have the same content and the same content, such as the same video and audio, among the assets that constitute the content. Here, the same and equivalent contents do not require the same encoding method and resolution.
The selection level indicates the selection priority order of assets in the group, for example, “0” is a default asset and “1” is an alternative asset.

(Data structure of video component descriptor)
Next, an example of a video component descriptor (Video_Component_Descriptor ()) will be described. Note that the video component descriptor (Video_Component_Descriptor ()) is a standard specified by ARIB (Radio Industry Association) in Non-Patent Document 3.
FIG. 5 is a diagram illustrating an example of a data structure of a video component descriptor (Video_Component_Descriptor ()) received by the receiving device of the present invention. The video component descriptor includes a video signal resolution (video_resolution), a video signal aspect ratio (video_aspect_ratio), and a video signal frame rate (video_frame_rate).

The video signal resolution (video_resolution) indicates the vertical resolution of the video signal. The video signal resolution (video_resolution) is encoded according to FIG.
FIG. 6 is a diagram illustrating an example of the value of the video signal resolution (video_resolution) received by the receiving apparatus of the present invention. For example, in the case of a 4K video, the resolution in the vertical direction of the 4K video is 2160, so the video signal resolution (video_resolution) is “6”. In the case of 8K video, since the vertical resolution of the 8K video is 4320, the video signal resolution (video_resolution) is “7”. In the case of SD (standard image quality) video, the vertical resolution of the SD video is 480, so the video signal resolution (video_resolution) is “3”.

The video signal aspect ratio (video_aspect_ratio) indicates the aspect ratio of the video signal. The video signal aspect ratio (video_aspect_ratio) is encoded according to FIG.
FIG. 7 is a diagram illustrating an example of the value of the video signal aspect ratio (video_aspect_ratio) received by the receiving apparatus of the present invention. For example, when the aspect ratio is 16: 9 (with pan vector), “2” is set. When the aspect ratio is 4: 3, it is “1”. The pan vector is angle-of-view information that is one of identification control information attached to a broadcast signal in digital television broadcasting, and is an addition for automatically identifying a change display to an aspect ratio of 4: 3. Information.

Returning to FIG. 5, the video signal frame rate (video_frame_rate) indicates the frame rate of the video signal. The video signal frame rate (video_frame_rate) is encoded according to FIG.
FIG. 8 is a diagram illustrating an example of the value of the video signal frame rate (video_frame_rate) received by the receiving apparatus of the present invention. For example, when the frame rate is 60 / 1.001 fps (frames per second), “8” is set. When the frame rate is 30 fps, “6” is set.

Returning to FIG. 3, the MPT may include information indicating a URL (Uniform Resource Locator) indicating a location on the Internet. For example, a broadcaster stores data indicating program-related information (communication content) related to a broadcast program in the server device 21. Then, the transmission device 11 transmits the program data and the configuration information by broadcasting, and includes data indicating the URL information of the program related information in the configuration information.
Thereby, the receiving device 31 can receive the broadcast program and acquire the URL information from the configuration information. The receiving device 31 transmits a communication content request signal to the server device 21 via the communication transmission path 22 based on the URL information. As described above, the receiving device 31 can acquire the program related information related to the broadcast program being received from the server device 21.
The information indicating the URL is stored in the MPT location information (MMT_general_location_info ()).

(Location information data structure)
Next, an example of location information (MMT_general_location_info ()) included in the MPT will be described. The location information (MMT_general_location_info ()) is a standard defined by ARIB (Radio Industry Association) in Non-Patent Document 3.
FIG. 9 is a diagram illustrating an example of a data structure of location information (MMT_general_location_info ()) received by the receiving apparatus of the present invention. The location information (MMT_general_location_info ()) includes a location type (location_type), a URL length (URL_length), and a URL byte (URL_byte).

  The location type (location_type) indicates the type of location information. For example, when the type of location information indicates a URL, “0x05” is set in the location type (location_type). The URL length (URL_length) indicates the length of the URL byte field in bytes. The URL byte (URL_byte) indicates a URL.

(Server device configuration)
Next, the configuration of the server device 21 will be described.
FIG. 10 is a block diagram showing the configuration of the server apparatus according to this embodiment. The server device 21 includes a control unit 210, a communication unit 213, and a storage unit 214. The control unit 210 includes a communication content acquisition unit 211 and a communication content distribution unit 212.

  The control unit 210 controls various operations of the server device 21. The communication content acquisition unit 211 acquires communication content via the communication transmission path 22 by the communication unit 213. The control unit 210 stores the communication content acquired by the communication content acquisition unit 211 in the storage unit 214. The control unit 210 is, for example, a CPU.

  In addition, the control unit 210 acquires a communication content request signal transmitted from the receiving device 31 via the communication transmission path 22 by the communication unit 213. When acquiring the communication content request signal, the control unit 210 acquires the communication content indicated by the requested communication content request signal from the storage unit 214. The communication content distribution unit 212 transmits the communication content acquired from the storage unit 214 to the reception device 31 via the communication transmission path 22 by the communication unit 213 via communication.

(Receiver configuration)
Next, the configuration of the receiving device 31 will be described.
FIG. 11 is a block diagram showing the configuration of the receiving apparatus according to this embodiment. The reception device 31 includes a tuner 311 (reception unit), a decoding unit 312, a separation unit 313, an audio decoding unit 314, an audio reproduction unit 315, a video decoding unit 316, a GUI synthesis unit 317, a video display unit 318, a communication unit 321, and a control. A unit 331, an operation input unit 332, and a storage unit 341 are configured.

  The tuner 311 receives the broadcast wave transmitted from the transmission device 11 via the broadcast transmission path 12. The tuner 311 specifies a broadcast channel band corresponding to the broadcast channel specified by the broadcast channel signal input from the control unit 331 based on an instruction from the operation input unit 332332. The tuner 311 down-converts the received signal of the broadcast channel band received as a broadcast wave into multiplexed data that is a baseband signal and demodulates it. The tuner 311 outputs the demodulated multiplexed data to the decoding unit 312.

  The decryption unit 312 decrypts the multiplexed data (encrypted) input from the tuner 311 with a decryption method (for example, AES) corresponding to the method used by the encryption unit 114 of the transmission device 11, Decoded multiplexed data is generated. The decoding unit 312 outputs the generated multiplexed data to the separation unit 313.

  The separation unit 313 separates the decoded data input from the decoding unit 312 into program data and configuration information. The separation unit 313 outputs the configuration information to the control unit 331. Further, the separation unit 313 extracts audio data and video data from the program data. The separation unit 313 outputs the extracted audio data to the audio decoding unit 314 and outputs the video data to the video decoding unit 316.

The audio decoding unit 314 receives audio data from the separation unit 313. The input audio data is data encoded by a predetermined audio encoding method (for example, MPEG-4 audio). The audio decoding unit 314 decodes audio data input by a decoding method corresponding to the encoding method used for encoding, and generates decoded audio data. The decoded audio data is data indicating the audio level at each time.
The audio reproduction unit 315 reproduces audio based on the audio data input from the audio decoding unit 314, and includes, for example, a speaker.

  When broadcasting using a hierarchical transmission method is provided, audio data of a plurality of reproduction methods may be input to the audio decoding unit 314, and a system selection signal may be input from the control unit 331 to the audio decoding unit 314. The system selection signal is a signal for instructing any one of a plurality of playback system sounds. The audio decoding unit 314 decodes audio data related to the reproduction method specified by the method selection signal, which is the reproduction method having the processing capability of the own audio decoding unit 314 among audio data of a plurality of predetermined reproduction methods. To produce the original audio data. The audio decoding unit 314 outputs the decoded original audio data to the audio reproduction unit 315.

  Therefore, when broadcasting using the hierarchical transmission method is provided, the sound of the reproduction method specified by the method selection signal is reproduced by the audio reproduction unit 315. When the method selection signal is not input, the audio decoding unit 314 outputs the original audio data related to the audio of the main broadcast to the audio reproduction unit 315.

  The video decoding unit 316 receives video data from the separation unit 313. The input video data is data encoded by a predetermined video encoding method (for example, HEVC, MPEG-2 video). The video decoding unit 316 decodes video data input by a decoding method corresponding to the encoding method used for encoding, and generates decoded video data. The decoded video data is data indicating signal values forming a video (frame image) at each time. The video decoding unit 316 outputs the decoded video data to the GUI synthesis unit 317.

  When broadcasting using the hierarchical transmission method is provided, video data having a plurality of resolutions may be input to the video decoding unit 316, and a system selection signal may be input from the control unit 331 to the video decoding unit 316. The method selection signal is a signal that designates one of a plurality of resolution images. The video decoding unit 316 performs decoding on video data related to a resolution specified by the method selection signal, which is a playback method that the self-video decoding unit 316 has processing capability, out of video data having a plurality of predetermined resolutions. Video data is generated.

  Therefore, when broadcasting by the hierarchical transmission method is provided, an image with a resolution specified by the method selection signal is displayed on the image display unit 318 after passing through the GUI composition unit 317. When the method selection signal is not input, the video decoding unit 316 outputs the original video data related to the main broadcast video to the video display unit 318 via the GUI synthesis unit 317.

A GUI (Graphical User Interface) combining unit 317 combines the video data input from the video decoding unit 316 and various GUI screen data input from the control unit 331, and generates video data to be displayed on the video display unit 318. Generate. The GUI screen data includes, for example, channel selection screen data for selecting broadcast channels, electronic program guide (EPG) data, and the like. Note that the video display unit 318 displays a video based on GUI screen data input from the control unit 331 via the GUI composition unit 317 input from the GUI composition unit 317.
Therefore, the video display unit 318 displays a video in which the video of the GUI screen related to the GUI screen data generated by the receiving device 31 is superimposed on the video related to the video data received by the receiving device 31.

  The video display unit 318 displays video based on video data input from the video decoding unit 316 via the GUI synthesis unit 317, and includes a display, for example, a liquid crystal display, an organic EL (Electroluminescence) display, and the like. Consists of.

  The communication unit 321 transmits and receives various data to and from an external device such as the server device 21 via the communication transmission path 22. Transmission / reception by each component of the reception device 31 is performed via the communication unit 321. The communication unit 321 is, for example, a device for connecting to a network, that is, a communication interface.

  The control unit 331 includes a computer (CPU) (not shown), and controls various operations of the reception device 31 by executing software stored in the storage unit. The control unit 331 acquires the reception state information of the broadcast wave being received from the tuner 311. The control unit 331 detects whether the acquired reception state information is a value higher than a predetermined reference value (the reception state is good) or a low value (the reception state is poor). . The predetermined reference value is, for example, whether the received signal has reached an intensity level that allows comfortable viewing when a high-resolution video such as a 4K / 8K video is displayed on the video display unit 318. This is a reference value indicating whether or not.

  For example, the control unit 331 detects that the broadcast is based on the hierarchical transmission method from the configuration information input from the separation unit 313. That is, it is detected that the video data includes a main broadcast video and a sub broadcast video.

  In addition, for example, when the control unit 331 recognizes that the intensity level of the received signal is lower than the reference value and detects that the rainfall-compatible broadcast is included in the video data, the method selection signal Is output to the video decoding unit 316. The system selection signal is a signal indicating switching to a sub broadcast (broadcast corresponding to rain) that broadcasts the same program as the main broadcast with a lower resolution by the hierarchical transmission system. In addition, the control unit 331 transmits a communication content request signal to the server device 21 via the communication unit 321 in order to acquire communication content including program related information related to the received broadcast program.

  The control unit 331 acquires data indicating communication content received by the communication unit 321 from the server device 21. The control unit 331 outputs data indicating the acquired communication content to the GUI composition unit 317. The communication content includes information related to program related information related to the broadcast program being received.

(Configuration of control unit)
Next, the configuration of the control unit 331 according to the present embodiment will be described.
FIG. 12 is a block diagram illustrating a configuration of the control unit 331 according to the present embodiment. The control unit 331 includes a reception level detection unit 3311, a configuration information decoding unit 3312, a screen configuration determination unit 3313, and a communication content acquisition unit 3314.

  The reception level detection unit 3311 determines whether the reception state is good or bad based on the reception state information input from the tuner 311. The reception status information is, for example, any one or combination of the field intensity of the broadcast wave detected by the tuner 311, the error rate of multiplexed data transmitted by the broadcast wave, and the CN value (Carrier-to-Noise Ratio). The reception level detection unit 3311 generates reception state information indicating whether the reception state is good or poor, and outputs the generated reception state information to the screen configuration determination unit 3313. For example, the reception level detection unit 3311 determines that the reception state is inferior when any of the following is true, and determines that the reception state is good when none of the following is true. (A) The received electric field strength is lower than a predetermined electric field strength threshold, (b) the error rate is higher than the predetermined error rate threshold, and (c) the CN value is lower than the predetermined CN value threshold.

  In addition, the reception failure that causes the reception state to be in a poor state includes, for example, a reception failure that occurs due to a decrease in the electric field strength of the broadcast wave due to rain, and the broadcast wave is blocked by a building or other object There are reception failures, etc. that occur.

  When the reception level detection unit 3311 determines that the reception state is good, the reception level detection unit 3311 generates reception state information indicating that the reception state is good, and outputs the generated reception state information to the screen configuration determination unit 3313. When the reception level detection unit 3311 determines that the reception state is poor, the reception level detection unit 3311 generates reception state information indicating that the reception state is poor, and outputs the generated reception state information to the screen configuration determination unit 3313.

  The configuration information decoding unit 3312 detects the MPT from the configuration information input from the separation unit 313, and determines whether or not a broadcast based on the hierarchical transmission scheme is provided based on the detected MPT. Here, the configuration information decoding unit 3312 determines whether an asset group descriptor (Asset_Group_Descriptor ()) described in the asset descriptor area (asset_descriptors_byte) of the MPT is described for each asset related to the program data.

  If the configuration information decoding unit 3312 determines that the asset group descriptor (Asset_Group_Descriptor ()) is described in MPT, the group ID set as a parameter in the asset group descriptor (Asset_Group_Descriptor ()) is set. (Group_identification) and selection level (selection_level) are acquired.

  Also, the configuration information decoding unit 3312 refers to the video component descriptor (Video_Component_Descriptor ()) for the asset indicated by the asset group descriptor (Asset_Group_Descriptor ()). The configuration information decoding unit 3312 acquires the video signal resolution (video_resolution), the video signal aspect ratio (video_aspect_ratio), and the video signal frame rate (video_frame_rate) set in the video component descriptor (Video_Component_Descriptor ()) as parameters.

  Therefore, the configuration information decoding unit 3312 uses one set of group ID (group_identification), selection level (selection_level), video signal resolution (video_resolution), video signal aspect ratio (video_aspect_ratio), and video signal frame rate (video_frame_rate). Acquired as configuration information related to one asset.

An example of configuration information acquired by the configuration information decoding unit 3312 when the main broadcast and the sub broadcast (rain-compatible broadcast) are being broadcast by the hierarchical transmission method is shown.
The configuration information of the main broadcast is “0x00” for the group ID (group_identification), “0” for the selection level (selection_level), “7” for the video signal resolution (video_resolution), and “2” for the video signal aspect ratio (video_aspect_ratio). The video signal frame rate (video_frame_rate) is “11”.
The sub-broadcast configuration information includes “0x00” for the group ID (group_identification), “1” for the selection level (selection_level), “3” for the video signal resolution (video_resolution), and “1” for the video signal aspect ratio (video_aspect_ratio). The video signal frame rate (video_frame_rate) is “5”.

  In the above example, both group IDs (group_identification) being “0x00” indicate that the program data related to the two pieces of configuration information are program data of the same broadcast program. The selection levels (selection_level) being “0” and “1” indicate that “0” is a default video, that is, a main broadcast, and “1” is a sub-broadcast. That is, when there are a plurality of program data having the same group ID (group_identification) and priorities are assigned according to the selection level (selection_level), the configuration information decoding unit 3312 performs the main broadcast by the hierarchical transmission method. It is possible to detect that a sub broadcast (for example, a rain corresponding broadcast) is being performed.

  Note that not only two types of main broadcast and sub broadcast, but also three or more types of broadcasts may be included. In this case, as the selection level (selection_level), values such as “2”, “3”, and “4” are set as parameters in addition to “0” and “1”. “0” is a default broadcast, and for parameter values other than “0”, a smaller number indicates an asset with a higher priority.

  For example, the larger the numerical value of the parameter value of the selection level (selection_level), the lower the resolution, so that the larger the numerical value, the smaller the video size of the broadcast video. It can be seen that the margin portion of the video display area 318 becomes large. That is, it can be seen that the display area in which the communication content can be displayed becomes larger in the video display area. Therefore, the data amount of the communication content to be acquired may be changed depending on the numerical value of the parameter value of the selection level (selection_level). That is, the display area for displaying the communication content is further increased as the broadcast video display area becomes smaller.

  The screen configuration determination unit 3313 acquires reception state information from the reception level detection unit 3311. Further, for example, the screen configuration determination unit 3313 receives, from the configuration information decoding unit 3312, a group ID (group_identification), a selection level (selection_level), a video signal resolution (video_resolution), a video signal aspect ratio (video_aspect_ratio), and a video signal frame rate. Two sets of configuration information (ie, main broadcast and sub broadcast) are acquired with (video_frame_rate) as one set of configuration information.

  For example, when the reception information indicating that the reception state is poor is acquired, the configuration information decoding unit 3312 acquires two sets of configuration information of the main broadcast and the sub broadcast as in the above example. The method selection signal is output to the video decoding unit 316. The system selection signal is a signal indicating switching to the sub broadcast (that is, the broadcast corresponding to rainfall) that broadcasts the same program as the main broadcast with a lower resolution by the hierarchical transmission system.

  Further, the screen configuration determination unit 3313 outputs a communication content request signal from the communication content acquisition unit 3314 to the communication unit 321 in order to acquire communication content including program related information related to the received broadcast program.

  The screen configuration determination unit 3313 acquires data indicating communication content transmitted by the server device 21 through communication from the communication unit 321. The screen configuration determination unit 3313 outputs data indicating the acquired communication content to the GUI composition unit 317. Note that the communication content includes program related information related to the broadcast program being viewed by the viewer.

The GUI composition unit 317 superimposes the video (GUI screen) based on the communication content indicated by the GUI screen data input from the screen configuration determination unit 3313 on the video of the broadcast program indicated by the video data input from the video decoding unit 316. The generated video is generated and displayed on the video display unit 318.
FIG. 13 is a schematic diagram illustrating an example of a video in which video based on communication content (GUI screen) is superimposed on video of a broadcast program according to the present embodiment. In FIG. 13A, the video 521a of the broadcast program is displayed in the video display area 511a. In FIG. 13B, a broadcast program video 521b and communication content video (GUI screen) 522 are displayed in the video display area 511b.

FIG. 13A is a display example in which the video display unit 318 displays the main broadcast video 521a before switching to reception of the sub-broadcast. FIG. 13A shows that a broadcast video, which is a professional baseball broadcast program, is displayed in the entire video display area 511a of the video display unit 318.
On the other hand, FIG. 13B shows a display example in which the video display unit 318 is displaying the sub-broadcast video 521b whose resolution is lower than the resolution included in the video display unit 318 after the reception is switched to the sub-broadcast. It is. The sub broadcast video with a low resolution is displayed using a part of the video display area 511b as shown in FIG. The video display unit 318 displays information on “intermediate progress of other stadiums” as communication content in an area below the area where the video of the sub broadcast is displayed. That is, in the lower area of the broadcast video of “Professional Baseball Broadcasting”, information about “middle progress of other stadiums” that is program related information is displayed.

(Receiver operation)
Next, the operation of the receiving device 31 will be described.
FIG. 14 is a flowchart showing the operation of the receiving device 31 according to this embodiment.
This flowchart is started when the separating unit 313 separates the decoded data input from the decoding unit 312 into program data and configuration information.

(Step S101) The separation unit 313 detects MPT from the multiplexed data decoded by the decoding unit 312, and separates the detected MPT. The configuration information decoding unit 3312 of the control unit 331 acquires the MPT from the separation unit 313, and refers to the asset group descriptor (Asset_Group_Descriptor ()) for each asset included in the MPT. The configuration information decoding unit 3312 detects a value set in the selection level (selection_level) of the asset group descriptor (Asset_Group_Descriptor ()). Then, it progresses to S102.

(Step S102)
If the value set in the selection level (selection_level) is “0” (default), the process returns to step S101. The case where the value is “0” indicates that the video included in the asset is a main broadcast video.
If the value set in the selection level (selection_level) is not “0”, the process proceeds to step S103. The case where the value is not “0” means that the value is “1” or more, and indicates that the video included in the asset is a video of a sub-broadcast (for example, rainfall-compatible broadcast). .

(Step S103)
The reception level detection unit 3311 acquires the reception state information input from the tuner 311 and confirms whether the reception state indicated by the reception state information is good or poor. Thereafter, the process proceeds to step S104.
(Step S104)
The reception level detection unit 3311 determines the reception state based on the confirmed reception state information. If the reception state is poor, the process proceeds to step S105. If the reception state is good, the process returns to step S101.

(Step S105)
The control unit 331 generates notification screen data notifying the viewer that the hierarchical transmission method is switched to the broadcast corresponding to rainfall. The notification screen is generated by acquiring a notification message stored in the storage unit 341 from the storage unit 341. The notification screen data in this case is GUI screen data that displays on the video display unit 318, for example, “Switch video to rainfall-compatible broadcast”. The GUI composition unit 317 notifies the viewer by superimposing the video of the GUI screen data indicating the generated notification screen on the broadcast video and displaying the video on the video display unit 318. Thereafter, the process proceeds to step S106.

(Step S106)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a method selection signal indicating switching to the video of the sub broadcast (for example, rain corresponding broadcast). The video decoding unit 316 switches the video data output to the GUI synthesis unit 317 from the main broadcast to the sub broadcast. Thereafter, the process proceeds to step S107.

(Step S107)
The communication content acquisition unit 3314 transmits a communication content request signal to the server device 21 via the communication unit 321. The communication content acquisition unit 3314 acquires data indicating communication content (for example, program related information) from the server device 21. The screen configuration determination unit 3313 outputs the communication content data acquired by the communication content acquisition unit 3314 to the GUI composition unit 317.
The GUI composition unit 317 displays a video (GUI screen) based on communication content data in a margin of the screen generated by switching to a video of a sub broadcast (for example, a rain compatible broadcast) reduced from the video of the main broadcast. ) Is displayed on the video display unit 318 by superimposing the video of the GUI screen data on the broadcast video of the sub broadcast. Then, the process shown in FIG. 14 is complete | finished.

As described above, the receiving device 31 according to the first embodiment of the present invention includes, from the received configuration information, the presence of a plurality of program data that are the same broadcast program and have different video resolutions from the MPT. Is provided with a configuration information decoding unit 3312. In addition, the reception device 31 includes a reception level detection unit 3311 that determines whether the reception state is good or bad based on the reception state information input from the tuner 311. The receiving device 31 includes a screen configuration determining unit 3313 that determines whether to switch the video to be displayed based on the program data included in the received broadcast wave and the reception state.
If the screen configuration determining unit 3313 determines to switch the video to be displayed, the screen configuration determining unit 3313 acquires communication content from the server device 21 and generates a video of a GUI screen to be displayed on the video display unit 318 by superimposing the content on the broadcast video. GUI screen data is generated.

With this configuration, for example, when broadcast data using a hierarchical transmission method can selectively receive program data of a sub-broadcast (for example, a rain-compatible broadcast) at the same time as the main broadcast, the broadcast wave is attenuated by the rain (rain attenuation) ), When it is detected that the reception state of the broadcast wave is inferior, the reception state is inferior by switching the reception to the sub-broadcast (which can be viewed even if the reception state is inferior). But you can continue watching.
Also, with this configuration, communication content such as program related information related to the broadcast program being received is displayed in a blank space on the video display unit 318 that is generated by switching reception to the sub broadcast having a video size smaller than that of the main broadcast. Can be displayed. Accordingly, it is possible to provide the viewer with an image that takes advantage of the high resolution and screen size originally provided in the digital television receiver.

(Second Embodiment)
A second embodiment of the present invention will be described.
When it is determined that the reception state is inferior, the receiving device 31 in the first embodiment changes from displaying the main broadcast image to the sub-broadcast (for example, rainfall-compatible broadcast) image displayed in a reduced size. The display was automatically switched to display a video on which video (GUI screen) based on communication content (for example, program related information) was superimposed.

  However, depending on the viewer and depending on the genre of the program, there may be a case where it is not always necessary to display the video with good image quality. For example, there are a case where a viewer views on a portable small terminal while moving, or a case where a viewer watches television while operating an Internet terminal, such as “watching while”. For example, the genre of the program is an animation or news program that does not require display with high image quality, or the audio is more important than the video for the viewer. In such a case, it is assumed that there is a viewer who wants to continue viewing on a large screen even if the image quality deteriorates without switching to a reduced screen.

In the second embodiment, when the screen configuration determination unit 3313 receives reception state information indicating that the reception state is inferior, a video display method is determined by selection by the viewer himself / herself. In other words, the viewer himself decides whether to switch to a reduced image, which is the original size of the rainfall-capable broadcast video, or to enlarge the rain-capable broadcast video in accordance with the size of the video display unit 318. An embodiment to be determined by selection according to will be described.
A part of the description common to the first embodiment is omitted.

(Receiver configuration)
The configuration of the receiving device 31 will be described with reference to FIG.
The control unit 331 controls various operations of the receiving device 31. For example, the control unit 331 acquires reception state information of a broadcast wave being received from the tuner 311. The control unit 331 recognizes whether the acquired reception state information is a value higher than a predetermined reference value (the reception state is good) or a low value (the reception state is poor). . The predetermined reference value is, for example, whether the received signal has reached an intensity level that allows comfortable viewing when a high-resolution video such as a 4K / 8K video is displayed on the video display unit 318. This is a reference value indicating whether or not.

  In addition, for example, the control unit 331 provides a hierarchy in which video data having a plurality of resolutions in one program and audio data in a plurality of reproduction methods are provided in one program from the configuration information input from the separation unit 313. Detects the presence of transmission type broadcasts. Note that broadcasts using the hierarchical transmission method include, for example, rainfall-compatible broadcasts that simultaneously broadcast sub-broadcasts with the same resolution and sound quality of the same program as the main broadcast as a countermeasure against the attenuation of broadcast waves due to rain. .

In addition, for example, when the control unit 331 recognizes that the received signal level is lower than the reference value (the reception state is poor) and detects the presence of the rain corresponding broadcast, Data of a notification screen indicating that the hierarchical transmission method is switched to the corresponding broadcast is generated. The notification screen is generated by acquiring the notification message stored in the storage unit 341 and data indicating the video display layout selection button image from the storage unit 341.
The notification screen data in this case is, for example, “Switch the video to rain compatible broadcast. Select the display mode. <Expand the rain compatible broadcast><View the rain compatible broadcast and program related content > ”Is displayed on the GUI screen data. “Switch the video to rain compatible broadcast. Please select the display mode.” Is a notification message. <Enlarge the rain compatible broadcast> and <View the rain compatible broadcast and program related content> This indicates the wording described in the selection button image of the video display layout.

  The storage unit 341 stores various data. The storage unit 341 is a storage medium, for example, an HDD (Hard Disk Drive), a flash memory, a ROM (Read Only Memory), a RAM (Random Access read / write Memory), or any of them. It is comprised including the combination of.

The control unit 331 outputs GUI screen data indicating the notification screen to the GUI composition unit 317. The GUI composition unit 317 superimposes the GUI screen data indicating the notification screen on the video data input from the video decoding unit 316 and causes the video display unit 318 to display it. The viewer refers to the notification screen displayed on the video display unit 318 and, through the operation input unit 332, either <viewing the rain-compatible broadcast> or <viewing the rain-compatible broadcast and program-related content> The button image can be selected.
The operation input unit 332 acquires an operation signal generated by receiving an operation input by a viewer, and outputs the acquired operation signal to the control unit 331.

  The operation signal generated by the operation input unit 332 includes, for example, a signal indicating power on / off and a signal indicating a broadcast wave channel. The operation input unit 332 is, for example, an input interface that receives an operation signal from an electronic device such as an operation button, a remote controller, or a portable terminal device.

  The control unit 331 outputs a method selection signal to the video decoding unit 316 when the operation signal input from the operation input unit 332 is an operation signal indicating <enlarged viewing of rain-supporting broadcast>. The system selection signal is a signal indicating that the same program as the main broadcast is switched to the sub broadcast (that is, the broadcast corresponding to the rain) which is broadcast with a lower resolution and sound quality by the hierarchical transmission system, and corresponding to the rain. This is a signal indicating that the broadcast is enlarged and displayed in the size of the video display area of the video display unit 318 (for example, the video display area in FIG. 13A).

  When the operation signal input from the operation input unit 332 is an operation signal indicating <viewing rainfall-compatible broadcast and program-related content>, the control unit 331 converts the method selection signal into the audio decoding unit 314 and the video decoding unit. To the unit 316. The system selection signal is a signal indicating that the same program as the main broadcast is switched to the sub broadcast (that is, the broadcast corresponding to rainfall) that broadcasts with the resolution and sound quality lowered by the hierarchical transmission system. In addition, the control unit 331 transmits a communication content request signal to the server device 21 via the communication unit 321 in order to acquire data indicating communication content including program-related information related to the received broadcast program. .

  The control unit 331 acquires data indicating communication content received from the server device 21 by the communication unit 321. The control unit 331 outputs the acquired communication content (including program related information related to the received broadcast program) to the GUI composition unit 317.

(Configuration of control unit)
For example, when the reception information indicating that the reception state is inferior is acquired, the configuration information decoding unit 3312 acquires, for example, two sets of configuration information of the main broadcast and the sub broadcast as in the above example. As described above, the notification screen data indicating that the viewer switches the hierarchical transmission method to the rain corresponding broadcast is generated as described above. The notification screen is generated by acquiring data indicating the notification message and the video display layout selection button image stored in the storage unit 341 from the storage unit 341.
The notification screen data in this case is, for example, “Switch the video to rain compatible broadcast. Select the display mode. <Expand the rain compatible broadcast><View the rain compatible broadcast and program related content GUI screen data for generating a GUI screen image displayed as “>”. Among them, “Switch the video to rain compatible broadcast. Please select the display mode.” Is a notification message, <Enlarge the rain compatible broadcast> and <View the rain compatible broadcast and program related content> Represents the wording described in the video display layout selection button image.

The screen configuration determination unit 3313 outputs GUI screen data indicating the notification screen to the GUI composition unit 317.
The screen configuration determination unit 3313 acquires an operation signal input through the operation input unit 332 by the viewer. The input operation signal is an operation signal indicating that one of the video display layout selection button images of <viewing the rain-compatible broadcast in an enlarged manner> or <viewing the rain-compatible broadcast and program-related content> has been selected. is there.

  When the operation signal input from the operation input unit 332 is an operation signal indicating <enlarged view of rainfall-compatible broadcast>, the screen configuration determination unit 3313 outputs a method selection signal to the video decoding unit 316. To do. The system selection signal is a signal indicating that the same program as the main broadcast is switched to the sub broadcast (that is, the broadcast corresponding to the rain) which is broadcast with a lower resolution and sound quality by the hierarchical transmission system, and corresponding to the rain. This is a signal indicating that the broadcast is enlarged and displayed in the size of the video display area provided in the video display unit 318.

  When the operation signal input from the operation input unit 332 is an operation signal indicating <viewing rainfall-compatible broadcast and program-related content>, the screen configuration determination unit 3313 sends the method selection signal to the video decoding unit 316. Output. The system selection signal is a signal indicating that the same program as the main broadcast is switched to the sub broadcast (that is, the broadcast corresponding to rainfall) that broadcasts with the resolution and sound quality lowered by the hierarchical transmission system. The screen configuration determination unit 3313 outputs a communication content request signal from the communication content acquisition unit 3314 to the communication unit 321 in order to acquire data indicating communication content including program-related information related to the received broadcast program. To do.

  The screen configuration determination unit 3313 acquires data indicating communication content transmitted by the server device 21 through communication, using the communication unit 321. The screen configuration determination unit 3313 outputs data indicating the acquired communication content (including program-related information related to the received broadcast program) to the GUI composition unit 317.

(Receiver operation)
Next, the operation of the receiving device 31 will be described.
FIG. 15 is a flowchart showing the operation of the receiving apparatus according to the second embodiment of the present invention.
This flowchart is started when the separating unit 313 separates the decoded data input from the decoding unit 312 into program data and configuration information.

(Step S201) The separation unit 313 detects MPT from the multiplexed data decoded by the decoding unit 312 and separates the detected MPT. The configuration information decoding unit 3312 of the control unit 331 acquires the MPT from the separation unit 313 and refers to the asset group descriptor (Asset_Group_Descriptor ()) included in the MPT. The configuration information decoding unit 3312 detects a value set in the selection level (selection_level) of the asset group descriptor (Asset_Group_Descriptor ()). Then, it progresses to S102.

(Step S202)
If the value set in the selection level (selection_level) is “0” (default), the process returns to step S201. The case where the value is “0” indicates that the video included in the asset is a main broadcast video.
If the value set for the selection level (selection_level) is not “0”, the process proceeds to step S203. The case where the value is not “0” means that the value is “1” or more, and indicates that the video included in the asset is a video of a sub-broadcast (for example, rainfall-compatible broadcast). .

(Step S203)
The reception level detection unit 3311 acquires the reception state information input from the tuner 311 and confirms whether the reception state indicated by the reception state information is good or poor. Thereafter, the process proceeds to step S204.
(Step S204)
The reception level detection unit 3311 determines the reception state based on the confirmed reception state information. If the reception state is poor, the process proceeds to step S105. If the reception state is good, the process returns to step S201.

(Step S205)
The control unit 331 generates notification screen data notifying the viewer that the hierarchical transmission method is switched to the broadcast corresponding to rainfall. The notification screen is generated by acquiring a notification message stored in the storage unit 341 from the storage unit 341.
The notification screen data in this case is, for example, “Switch the video to rain compatible broadcast. Select the display mode. <Enlarge the rain compatible broadcast><Rain compatible broadcast The GUI screen data is displayed as “View program-related content>”. The GUI composition unit 317 notifies the viewer by superimposing the video of the GUI screen data indicating the generated notification screen on the broadcast video and displaying the video on the video display unit 318. Thereafter, the process proceeds to step S206.

(Step S206)
The screen configuration determination unit 3313 acquires an operation signal input through the operation input unit 332 by the viewer. The input operation signal is an operation signal indicating that one of the video display layout selection button images of <viewing the rain-compatible broadcast in an enlarged manner> or <viewing the rain-compatible broadcast and program-related content> has been selected. is there.
If the operation signal input from the operation input unit 332 is an operation signal indicating <viewing the rainfall-compatible broadcast in an enlarged manner>, the process proceeds to step S209.
If the operation signal input from the operation input unit 332 is an operation signal indicating <view rainfall-compatible broadcast and program-related content>, the process proceeds to step S207.

(Step S207)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a method selection signal indicating switching to the video of the sub broadcast (for example, rain corresponding broadcast). The video decoding unit 316 switches the video data output to the GUI synthesis unit 317 from the main broadcast to the sub broadcast. Thereafter, the process proceeds to step S208.

(Step S208)
The communication content acquisition unit 3314 transmits a communication content request signal to the server device 21 via the communication unit 321. The communication content acquisition unit 3314 acquires data indicating communication content (for example, program related information) from the server device 21. The screen configuration determination unit 3313 outputs data indicating the communication content acquired by the communication content acquisition unit 3314 to the GUI composition unit 317.
The GUI composition unit 317 displays a video (GUI screen) based on communication content data in a margin of the screen generated by switching to a video of a sub broadcast (for example, a rain compatible broadcast) reduced from the video of the main broadcast. ) Is displayed on the video display unit 318 by superimposing the video of the GUI screen data on the broadcast video of the sub broadcast. Thereafter, the process shown in FIG.

(Step S209)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a method selection signal indicating switching to the video of the sub-broadcast (for example, rain corresponding broadcast). The video decoding unit 316 outputs the video data to the GUI synthesis unit 317. Is switched from the main broadcast to the sub broadcast.
Also, the GUI composition unit 317 enlarges the video of the sub broadcast (which has a resolution lower than that of the main broadcast) to the size of the video display area included in the video display unit 318 and causes the video display unit 318 to display the video. Thereafter, the process shown in FIG.

  As described above, the receiving device 31 according to the second embodiment of the present invention includes, from the received configuration information, the presence of a plurality of program data that are the same broadcast program and have different video resolutions from the MPT. Is provided with a configuration information decoding unit 3312. In addition, the reception device 31 includes a reception level detection unit 3311 that determines whether the reception state is good or bad based on the reception state information input from the tuner 311. The receiving device 31 includes a screen configuration determining unit 3313 that determines whether to switch the video to be displayed based on the program data included in the received broadcast wave and the reception state.

  When it is determined that the video to be displayed is switched, the screen configuration determination unit 3313 generates a notification screen for allowing the viewer to select a video display mode. The screen configuration determination unit 3313 controls the GUI composition unit 317 based on a signal by the operation input of the viewer.

If the signal input by the viewer's operation is a signal indicating that the sub-broadcast is to be enlarged and displayed, the screen configuration determination unit 3313 sets the size of the video display area included in the video display unit 318 in the GUI composition unit 317. Control is performed such that the video of the sub broadcast is enlarged and displayed on the video display unit 318.
When the signal by the operation input of the viewer is a signal indicating that the communication content such as the program related information is displayed together with the sub broadcast, the screen configuration determination unit 3313 acquires data indicating the communication content from the server device 21. Then, GUI screen data for generating a GUI screen video to be displayed on the video display unit 318 by being superimposed on the sub broadcast video is generated.

With this configuration, for example, when broadcast data using a hierarchical transmission method can selectively receive program data of a sub-broadcast (for example, a rain-compatible broadcast) at the same time as the main broadcast, the broadcast wave is attenuated by the rain (rain attenuation) ) And the like, when it is detected that the reception state of the broadcast wave is inferior, the video display method is determined by the selection by the viewer himself / herself.
In other words, the communication content is displayed by switching to a reduced video that is the original size of the rain-compatible broadcast video, or the rain-compatible broadcast video is enlarged according to the size of the video display unit 318. Whether to display or not is determined by the viewer's own selection. As a result, it is possible to provide viewers with images that take advantage of the high resolution and screen size inherent in digital television receivers.

  Also in the second embodiment, not only two types of main broadcast and sub broadcast, but also three or more types of broadcasts may be included. For example, as the parameter value of the selection level (selection_level) included in the asset group descriptor (Asset_Group_Descriptor ()) is larger, by associating it so as to indicate that the resolution is lower, the parameter value becomes more It can be seen that the larger the broadcast video area, the smaller the broadcast video area. That is, conversely, it can be seen that the display area where the communication content can be displayed becomes larger.

  Therefore, the data amount of the communication content to be acquired may be changed depending on the numerical value of the parameter value of the selection level (selection_level). As the parameter value of the selection level (selection_level) is larger, more communication content data is acquired from the server device 21 and information based on more communication content is displayed in the communication content display area. .

(Third embodiment)
A third embodiment of the present invention will be described.
In the first and second embodiments, description has been given of generating video by superimposing video of communication content on broadcast video. Note that the generation of the video that combines the broadcast video and the video of the communication content may be realized by activating an application of the broadcast communication cooperation service.

Recently, as one of the new broadcasting / communication cooperation services, for example, there is a service using Hybridcast (registered trademark). Hybridcast is a basic technology for superimposing a video of communication content on a video of broadcast content to form one video and displaying the video on a display of a digital TV receiver compatible with Hybridcast.
In the third embodiment, when the screen configuration determination unit 3313 receives reception state information indicating that the reception state is inferior, the broadcast communication cooperation service (for example, Hybridcast (registered trademark)) application is activated. An embodiment in which the viewer selects whether or not will be described.
In addition, description is abbreviate | omitted partially about the part which is common in 1st Embodiment and 2nd Embodiment.

  In a broadcasting / communication cooperation service (for example, Hybridcast (registered trademark)) realized by the broadcasting system according to the third embodiment, an application information table (AIT) that stores application information is used. Control startup. In a broadcasting system using MMT as a multiplexing method, MH-AIT (Mpeg-H-Application Information Table; MH-application information table) that is control information having the same function as AIT can be used. That is, a receiving apparatus of a broadcasting system that uses MMT as a multiplexing scheme controls application activation based on MH-AIT.

  Note that the MH-AIT is one of data included in the configuration information received by the receiving device 31 as in the MPT. In the receiving device 31 of the broadcasting system 1 according to the third embodiment, activation of an application is controlled based on information included in the MH-AIT.

(MH-AIT data structure)
Next, an example of MH-AIT data included in the configuration information will be described. Note that MH-AIT is a standard specified in Non-Patent Document 3 by ARIB (Association of Radio Industries and Businesses).
FIG. 16 is a diagram illustrating an example of the data structure of the MH-AIT included in the configuration information received by the receiving apparatus according to the present embodiment. In the example illustrated in FIG. 16, MH-AIT includes an application format (application_type), an application identifier (application_identifier ()), and an application control code (application_control_code). Note that “rpchof” (remaining principal coefficients high order order first) described in FIG. 16 means that the coefficients of the multiplier polynomial are arranged in descending order.

The application format (application_type) indicates the format of the application to be controlled by the AIT.
FIG. 17 is a diagram illustrating an example of the value of the application format (application_type) included in the configuration information received by the receiving device according to the present embodiment. For example, when the value of the application format (application_type) is “0x0010”, it indicates that the format of the application to be controlled by the AIT is “broadcast communication cooperative HTML5 application”.

  The application identifier (application_identifier ()) is a value that uniquely identifies the application. This value is defined for each application format.

The application control code (application_control_code) is an 8-bit field that defines a control code for controlling the state of the application. The application control code (application_control_code) is encoded according to FIG.
FIG. 18 is a diagram illustrating an example of the value of the application control code (application_control_code) included in the configuration information received by the receiving apparatus according to the present embodiment. For example, the application state control performed when the value of the application control code (application_control_code) is “0x01” indicates “AUTOSTART”, that is, the application is started.

(Receiver operation)
The operation of the receiving device 31 will be described.
FIG. 19 is a flowchart showing the operation of the receiving apparatus according to the third embodiment of the present invention.
This flowchart is started when the separating unit 313 separates the decoded data input from the decoding unit 312 into program data and configuration information.

(Step S301) The separation unit 313 detects MPT from the multiplexed data decoded by the decoding unit 312, and separates the detected MPT. The configuration information decoding unit 3312 of the control unit 331 acquires the MPT from the separation unit 313 and refers to the asset group descriptor (Asset_Group_Descriptor ()) included in the MTP. The configuration information decoding unit 3312 detects a value set in the selection level (selection_level) of the asset group descriptor (Asset_Group_Descriptor ()). Then, it progresses to S302.

(Step S302)
If the value set in the selection level (selection_level) is “0” (default), the process returns to step S101. The case where the value is “0” indicates that the video included in the asset is a main broadcast video.
If the value set for the selection level (selection_level) is not “0”, the process proceeds to step S303. The case where the value is not “0” means that the value is “1” or more, and indicates that the video included in the asset is a video of a sub-broadcast (for example, rainfall-compatible broadcast). .

(Step S303)
The reception level detection unit 3311 acquires the reception state information input from the tuner 311 and confirms whether the reception state indicated by the reception state information is good or poor. Thereafter, the process proceeds to step S304.
(Step S304)
The reception level detection unit 3311 determines the reception state based on the confirmed reception state information. If the reception state is poor, the process proceeds to step S305. If the reception state is good, the process returns to step S301.

(Step S305)
The control unit 331 generates notification screen data notifying the viewer that the hierarchical transmission method is switched to the broadcast corresponding to rainfall. The notification screen is generated by acquiring a notification message stored in the storage unit 341 from the storage unit 341.
In this case, for example, the notification screen data is displayed on the video display unit 318 as “Switch video to rainfall-compatible broadcast. Do you want to start the broadcasting / communication cooperation service? <Yes><No>”. It is GUI screen data. The GUI composition unit 317 notifies the viewer by superimposing the video of the GUI screen data indicating the generated notification screen on the broadcast video and displaying the video on the video display unit 318. Thereafter, the process proceeds to step S306.

(Step S306)
The screen configuration determination unit 3313 acquires an operation signal input through the operation input unit 332 by the viewer. The input operation signal is either <Yes> (that is, start the broadcasting / communication cooperation service) or <No> (that is, do not start the broadcasting / communication cooperation service). This is an operation signal indicating this.
If the operation signal input from the operation input unit 332 is an operation signal indicating <Yes>, the process proceeds to step S307.
If the operation signal input from the operation input unit 332 is an operation signal indicating <No>, the process proceeds to step S309.

(Step S307)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a method selection signal indicating switching to the video of the sub broadcast (for example, rain corresponding broadcast). The video decoding unit 316 switches the video data output to the GUI synthesis unit 317 from the main broadcast to the sub broadcast. Thereafter, the process proceeds to step S308.

(Step S308)
Based on the application control information indicated by MH-AIT which is one of the configuration information decoded by the configuration information decoding unit 3312, the screen configuration determination unit 3313 executes the broadcast communication cooperation service stored in the storage unit 341. The application to be read is read and the application is started. The application operates in the screen configuration determination unit 3313. The application transmits a communication content request signal to the server device 21 via the communication unit 321.

  The application acquires data indicating communication content used in the broadcasting / communication cooperation service from the server device 21. The application outputs data indicating communication content used in the broadcasting / communication cooperation service to the GUI composition unit 317. The GUI composition unit 317 superimposes a video (GUI screen) based on the communication content data of the broadcasting / communication cooperation service on the sub-broadcast (for example, rainfall-compatible broadcast) reduced from the main broadcast video, and displays the video display unit. 318 is displayed. Thereafter, the process shown in FIG. 16 ends.

(Step S309)
The video decoding unit 316 acquires, from the screen configuration determination unit 3313, a method selection signal indicating switching to the video of the sub-broadcast (for example, rain corresponding broadcast). The video decoding unit 316 outputs the video data to the GUI synthesis unit 317. Is switched from the main broadcast to the sub broadcast.
Also, the GUI composition unit 317 enlarges the video of the sub broadcast (which has a resolution lower than that of the main broadcast) to the size of the video display area included in the video display unit 318 and causes the video display unit 318 to display the video. Thereafter, the process shown in FIG. 16 ends.

  Note that, as described above, communication content data to be acquired depending on the numerical value of the parameter value of the selection level (selection_level) set in the asset group descriptor (Asset_Group_Descriptor ()) of the MPT included in the configuration information. You may make it the structure which changes quantity. That is, as the broadcast video display area becomes smaller, the display area for displaying the communication content of the broadcast communication cooperation service is further increased.

  As described above, the receiving device 31 according to the third embodiment of the present invention determines whether to switch the video to be displayed based on the program data included in the received broadcast wave and the reception state. A screen configuration determination unit 3313 is provided. When it is determined that the video to be displayed is switched, the screen configuration determination unit 3313 generates a notification screen for allowing the viewer to select a video display mode. The screen configuration determination unit 3313 controls the GUI composition unit 317 based on a signal by the operation input of the viewer.

If the signal input by the viewer's operation is a signal indicating that the sub-broadcast is to be enlarged and displayed, the screen configuration determination unit 3313 sets the size of the video display area included in the video display unit 318 in the GUI composition unit 317. Control is performed such that the video of the sub broadcast is enlarged and displayed on the video display unit 318.
When the signal by the operation input of the viewer is a signal indicating that the broadcasting / communication cooperation service is activated, the screen configuration determination unit 3313 executes an application for executing the broadcasting / communication cooperation service. Then, the receiving device 31 causes the video display unit 318 to display a combination of the sub broadcast and the communication content according to the broadcast communication cooperation service. The broadcast communication cooperation service is, for example, Hybridcast (registered trademark).

With this configuration, for example, when broadcast data using a hierarchical transmission method can selectively receive program data of a sub-broadcast (for example, a rain-compatible broadcast) at the same time as the main broadcast, the broadcast wave is attenuated by the rain (rain attenuation) ) And the like, when it is detected that the reception state of the broadcast wave is inferior, the video display method is determined by the selection by the viewer himself / herself.
In other words, the broadcast cooperation service is started by switching to a reduced image that is the original size of the rain-compatible broadcast video, or the rain-compatible broadcast video is enlarged and displayed in accordance with the size of the video display unit 318. The decision is made by the viewer himself or herself. As a result, it is possible to provide viewers with images that take advantage of the high resolution and screen size inherent in digital television receivers.

  Similar to the above-described embodiment, the third embodiment may include not only two types of main broadcast and sub-broadcast but also three or more types of broadcasts. For example, as the parameter value of the selection level (selection_level) included in the asset group descriptor (Asset_Group_Descriptor ()) is larger, by associating it so as to indicate that the resolution is lower, the parameter value becomes more It can be seen that the larger the broadcast video area, the smaller the broadcast video area. That is, conversely, it can be seen that the display area where the communication content can be displayed becomes larger.

  Therefore, the data amount of the communication content to be acquired may be changed depending on the numerical value of the parameter value of the selection level (selection_level). A configuration in which, as the parameter value of the selection level (selection_level) is larger, more communication content data is acquired from the server device 21 and information based on more communication content is displayed by the application of the broadcast communication cooperation service. It is.

(Fourth embodiment)
A fourth embodiment of the present invention will be described.
In the third embodiment, based on the configuration information including information indicating the resolution of the broadcast video, the broadcast communication cooperation service application operating on the receiving device 31 determines the communication content to be displayed.
In the fourth embodiment, for example, when a broadcaster transmits a broadcast wave, the amount of information suitable for the selection level (selection_level) set in the asset group descriptor (Asset_Group_Descriptor ()) of the MPT included in the configuration information Is stored in the server device 21 in advance.

The communication content having an information amount suitable for the set selection level (selection_level) is stored in advance, that is, as follows.
As the parameter value of the selection level (selection_level) is larger, association is performed so as to indicate that the resolution of the broadcast video is lower, so that the display area of the communication content is larger as the parameter value is larger. Accordingly, the larger the display area, the larger the information content of the communication content to be displayed, for example, the communication content having an information amount suitable for the display area is prepared in advance and stored in the server device 21. To.

  With this configuration, it is possible to provide viewers with videos that take advantage of the high resolution and screen size originally provided in digital TV receivers.

(Fifth embodiment)
A fifth embodiment of the present invention will be described.
In the first to fourth embodiments, the embodiments have been described in which the video of the main broadcast and the video of the sub-broadcast (for example, rain-compatible broadcast) are switched by switching the hierarchical transmission method. However, the broadcast is not limited to the hierarchical transmission method. That is, it is only necessary that a plurality of the same broadcast programs are broadcast simultaneously with different resolutions. For example, when the same broadcast program is broadcast at a plurality of resolutions or the like by simulcast (also referred to as simultaneous broadcast) provided by broadcast waves, the received broadcast is switched based on the reception state. Embodiment may be sufficient.
With this configuration, it is possible to provide viewers with videos that take advantage of the high resolution and screen size originally provided in digital TV receivers.

(Sixth embodiment)
A sixth embodiment of the present invention will be described.
In the fifth embodiment, the reception is switched to the simulcast provided by the broadcast wave. However, it is not limited to broadcasting provided by broadcast waves. For example, the receiving device 31 may receive the same broadcast program from the server device 21 via the communication transmission path 22 by communication. In addition, when delivering the same content as broadcast by radio waves on an IP network such as the Internet, it is also called IP simulcast. Even when it is difficult to receive even a low-resolution broadcast by the hierarchical transmission method due to heavy rain or the like, the receiving device 31 can receive the same broadcast program from the server device 21 by communication.
With this configuration, it is possible to provide viewers with videos that take advantage of the high resolution and screen size originally provided in digital TV receivers.

The embodiment of the present invention has been described in detail above, but the specific configuration is not limited to the above-described one, and various design changes and the like can be made without departing from the scope of the present invention. is there.
For example, the broadcast system 1 according to the above-described embodiment is a broadcast system related to broadcasting with 4K / 8K video, that is, a video system using MMT as a multiplexing method, but is not limited thereto. For example, the broadcasting system 1 according to another embodiment may be a broadcasting system that uses a TS (Transport Stream) as a multiplexing method.

In the description of the above-described embodiment, the program related information is illustrated as an example of the communication content, but is not limited thereto.
The communication content may be content such as weather information and traffic information that provides information related to the weather, for example, when reception is switched to rainfall-compatible broadcasting.
The communication content may be content including information related to the genre of the program to which the broadcast program belongs regardless of the program related information directly related to the broadcast program being viewed. For example, if the broadcast program being viewed is a movie, the content such as information related to the genre of the movie, for example, information related to a service provided by a rental DVD provider, or information related to a service provided by an on-demand broadcaster It may be.

  Further, the content to be displayed superimposed on the video of the broadcast program may not be the content received by communication. The content may be based on information included in other configuration information of the broadcast wave, for example, information included in data of data broadcasting or EPG (Electronic Program Guide). In addition, content (offline content) that does not involve reception through broadcasting or communication, for example, content stored in advance in the storage unit 341 may be used.

  Further, for example, when a movie program is being broadcast, the content may be a scene in which a scene (timing) switched to rain-compatible broadcasting is recorded and the timing is displayed. As a result, the viewer can grasp up to what scene the normal (high resolution) broadcast video could be viewed, so once the program was switched to rain compatible broadcasting, the program was temporarily stopped. At a later date, viewing can be resumed from the subsequent scene by rental DVD, on-demand broadcasting, or rebroadcasting.

  The communication content may be an application that promotes communication between viewers, such as SNS (Social Network Service), social game, bulletin board, or the like.

  In addition, you may make it implement | achieve a part or all of the transmitter 11, the server apparatus 21, and the receiver 31 in embodiment mentioned above with a computer. In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.

  Here, the “computer system” is a computer system built in the transmission device 11, the server device 21, and the reception device 31, and includes hardware such as an OS and peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system.

  Furthermore, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In this case, a volatile memory inside a computer system that serves as a server or a client may be included that holds a program for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  Further, the transmission device 11, the server device 21, and the reception device 31 in the above-described embodiments may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each functional block of the broadcasting system 1 and the base station apparatus 2 may be individually made into a processor, or a part or all of them may be integrated into a processor. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to the advancement of semiconductor technology, an integrated circuit based on the technology may be used.

  DESCRIPTION OF SYMBOLS 1 ... Broadcasting system, 11 ... Transmission apparatus, 12 ... Broadcast transmission path, 13 ... Broadcasting satellite, 21 ... Server apparatus, 22 ... Communication transmission path, 31 ... Reception apparatus , 111... Program data generation unit, 112... Configuration information generation unit, 113 .. multiplexing unit, 114 .. encryption unit, 115 .. transmission unit, 210. ... Communication content acquisition unit, 212 ... Communication content distribution unit, 213 ... Communication unit, 214 ... Storage unit, 311 ... Tuner, 312 ... Decoding unit, 313 ... Separation unit 314 ... Audio decoding unit, 315 ... Audio reproduction unit, 316 ... Video decoding unit, 317 ... GUI synthesis unit, 318 ... Video display unit, 321 ... Communication unit, 331 ..Control unit, 332 ... operation input unit, 341 ... memory , 3311 ... reception level detection unit, 3312 ... configuration information decoding unit, 3313 ... screen configuration determination unit, 3314 ... communication content acquisition unit, 511a ... video display area, 511b ... video. Display area, 521a, main broadcast video, 521b, sub broadcast video, 522, communication content video (GUI screen)

Claims (7)

A reception level detector;
A control unit that generates a first program video or a video obtained by combining the second program video and a video other than the program video;
With
Based on the detection output of the reception level detection unit, the control unit generates the first program video, or generates a video combining the second program video and a video other than the program video. Let
Receiver device. The control unit determines a video to be generated based on input content from a user.
The receiving device according to claim 1. When the control unit generates a video that combines the second program video and a video other than the program video,
Generating a video other than the program video based on data acquired via a communication network other than broadcasting,
The receiving device according to claim 1 or 2. When the control unit generates a video that combines the second program video and a video other than the program video,
Generating a video that combines the second program video and a video other than the program video by activating a broadcast communication cooperation service;
The receiving device according to claim 1 or 2. A broadcasting system comprising a transmitting device for transmitting data and a receiving device for receiving the data,
The receiving device detects a broadcast that the device receives is a hierarchical service; and
A control unit for generating a first program video or generating a video combining a second program video and a video other than the program video;
With
When the detection unit detects the hierarchical service, the control unit generates only the first program video, or combines the second program video and a video other than the program video. To generate,
Broadcast system. A detection process for detecting that the received broadcast is a hierarchical service;
A control process for generating a video that combines the first program video or the second program video and a video other than the program video;
Including
When detecting that the detection process is the hierarchical service,
The control process generates only the first program video, or generates a video combining the second program video and a video other than the program video.
Reception method. In the computer of the receiving device,
A detection procedure for detecting that the received broadcast is a hierarchical service;
A control procedure for generating a video that combines the first program video or the second program video and a video other than the program video;
Including
When detecting that the detection procedure is the hierarchical service,
The control procedure generates only the first program video, or generates a video combining the second program video and a video other than the program video.
Program to execute the procedure.

Images