JP6381465B2 - Receiving apparatus, receiving method, and program - Google Patents

Description

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

  Test broadcasting of 4K (3840 × 2160) ultra-high-definition television broadcasting (UHDTV; Ultra High Definition Television, hereinafter referred to as 4K broadcasting) has been started as a next-generation television broadcasting service. Furthermore, research and development relating to 8K (7680 × 4320) ultra-high-definition television broadcasting (hereinafter referred to as 8K broadcasting) is underway.

  In such 4K / 8K ultra-high-definition television broadcasting, it has been studied that the transmission path coding system is based on the advanced broadband satellite digital broadcasting system (see, for example, Non-Patent Document 1). In addition, in 4K / 8K ultra-high-definition television broadcasting, the multiplexing method is a MMT / TLV (MMT / TLV) that converts video signals, audio signals, etc. into MMT (MPEG Media Transport) packets and transmits them in IP (Internet Protocol) packets. (Type Length Value) multiplexing schemes have been studied (see, for example, Non-Patent Document 1).

  As described above, the advanced broadband satellite digital broadcasting system is realized using MMT, which is a media transport system standardized by MPEG. One of the information stored in a PA (Package Access) message that constitutes the control information of the MMT is a layout setting table (LCT; Layout Configuration Table). The layout setting table is used to associate a plurality of display areas presented on the display screen with layout numbers. As a result, the broadcast station can display the designated content in the designated display area on the viewer's television receiver. For example, the display area can be divided into left and right two screens, and video and audio of 8K content and 4K content can be output to the respective display areas.

The Japan Radio Industry Association, “ARIB STD-B60 version 1.1 Media transport system standard by MMT in digital broadcasting”

  As described above, when video data indicating video of 8K content and 4K content and audio data indicating audio are transmitted from the broadcasting station, all received data can be decoded depending on the capability of the decoder of the receiver. Not necessarily. For example, the receiver includes only one decoder that decodes video data and one decoder that decodes audio data. Also, for example, when the decoder does not support 8K content. In such a case, video and audio can be output only to at least one of the left and right display areas.

  The present invention has been made in view of the above points, and provides a receiving apparatus, a receiving method, and a program capable of displaying an image in a display area where nothing is displayed.

(1) The present invention has been made to solve the above problems, and as one aspect of the present invention, a receiving unit that receives broadcast waves, a control unit including a comparison unit, and a display unit are provided. The comparison unit can compare the number of video assets in the asset included in the broadcast wave configuration information and the number of display areas, and can decode the reception device in the asset included in the broadcast wave configuration information. Comparing at least one of the number of video assets and the number of display areas, and, based on the result of the comparison, video content other than the video assets in a partial area of the display unit. A receiving device characterized by displaying.

(2) Moreover, as one aspect of the present invention, the receiving apparatus according to (1), further including an acquisition unit that acquires video content other than the video asset from at least one external device. .

(3) According to another aspect of the present invention, the control unit includes: an acquisition unit that acquires video content other than the video asset from at least one external device; and a storage unit that stores the video content. The receiving apparatus according to (1), wherein the video content is acquired from the external device or the storage unit.

(4) Further, according to one aspect of the present invention, the control unit adjusts a display size of the video content so as to fit in a partial area of the display unit. It is a receiver of description.

(5) As an aspect of the present invention, the control unit adjusts the size of the video content so as to fit in the full screen size of the display unit, and the video content is included in a partial area of the display unit. The receiving apparatus according to (1), wherein a part of the information is displayed.

(6) Moreover, as 1 aspect of this invention, the said control part changes the display part of the said video content displayed on the one part area | region of the said display part, It is characterized by the above-mentioned. The receiving device.

(7) Moreover, as one aspect of the present invention, the control unit causes the video content having the same aspect ratio as the partial area of the display unit to be displayed in the partial area of the display unit. The receiving device according to (1), characterized in that

(8) Further, as one aspect of the present invention, the method includes a reception step of receiving a broadcast wave, a control step including a comparison step, and a display step, and the comparison step includes the broadcast wave configuration information. Comparison between the number of video assets and the number of display areas in the generated assets, and the comparison between the number of video assets that can be decoded by the receiving device in the assets included in the broadcast wave configuration information and the number of display areas Comparing at least one of the two and displaying video content other than the video asset in a partial area of the area displayed in the display step based on the comparison result. It is a receiving method.

(9) Further, as one aspect of the present invention, the computer includes a reception step of receiving a broadcast wave, a control step including a comparison step, a display step, and the comparison step including the broadcast wave configuration information. At least a comparison between the number of video assets in the asset and the number of display areas, and a comparison between the number of video assets that can be decoded by the receiving device in the asset included in the broadcast wave configuration information and the number of display areas Performing one of the comparisons, and displaying video content other than the video asset in a partial area of the area displayed in the display step based on a result of the comparison. Is a program.

  According to the present invention, when there is a display area in which an image received by a broadcast wave cannot be displayed, an image acquired from other than the broadcast wave is displayed in the display area. Thereby, the video can be displayed in the display area where nothing is displayed, and the uncomfortable feeling of viewing can be eliminated.

It is the schematic which shows an example of a structure of the broadcast system 1 which concerns on the 1st Embodiment of this invention. It is a block diagram which shows an example of a structure of the transmitter 11 which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the structure of the protocol stack which the broadcasting system 1 which concerns on the 1st Embodiment of this invention uses. It is a figure which shows an example of the data structure of MPT which the receiver 31 which concerns on the 1st Embodiment of this invention receives. It is a figure which shows an example of the data structure of LCT which the receiver 31 which concerns on the 1st Embodiment of this invention receives. It is a figure which shows an example of the data structure of the MPU display area designation | designated descriptor which the receiver 31 which concerns on the 1st Embodiment of this invention receives. It is a figure which shows the example of a setting of the display area which the receiver 31 which concerns on the 1st Embodiment of this invention displays. It is a figure which shows the example of a setting of the display area which the receiver 31 which concerns on the 1st Embodiment of this invention displays. It is a figure which shows the example of a setting of the display area which the receiver 31 which concerns on the 1st Embodiment of this invention displays. It is a figure which shows the example of a setting of the MPU display area designation | designated descriptor which the receiver 31 which concerns on the 1st Embodiment of this invention sets. It is a block diagram which shows an example of a structure of the receiver 31 which concerns on the 1st Embodiment of this invention. It is a block diagram which shows an example of a structure of the control part 331 which concerns on the 1st Embodiment of this invention. It is the schematic which shows an example of the video selection screen for alternative displays which the receiver 31 which concerns on the 1st Embodiment of this invention displays. It is the schematic which shows the outline | summary of operation | movement of the receiver 31 which concerns on the 1st Embodiment of this invention. It is a flowchart which shows an example of operation | movement of the receiver 31 which concerns on the 1st Embodiment of this invention. It is the schematic which shows an example of the image | video which the receiver 31 which concerns on the 3rd Embodiment of this invention displays. It is the schematic which shows an example of the image | video which the receiver 31 which concerns on the 4th Embodiment of this invention displays. It is the schematic which shows an example of the image | video which the receiver 31 which concerns on the 5th Embodiment of this invention displays. It is the schematic which shows an example of the image | video which the receiver 31 which concerns on the 6th Embodiment of this invention displays.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings. In the following description, the digital broadcast receiving apparatus of the present invention is simply referred to as “receiving apparatus”.
FIG. 1 is a schematic diagram showing an example of a configuration of a broadcasting system according to the first embodiment of the present invention.
The broadcast system 1 of the first embodiment includes a transmission device 11, a broadcast transmission path 12, a reception device 31, and an external device 41 (41A, 41B). In the broadcasting system 1, the number of the transmission apparatuses 11 and the reception apparatuses 31 is generally plural. However, in the following description, in order to facilitate the description, the transmission apparatuses 11 and the reception apparatuses 31 are different. The case of the broadcasting system 1 in which the number is one each will be described.

  In the following description, as a media transport system for digital broadcasting in the broadcasting system 1, for example, ARIB (Association of Radio Industries and Businesses) STD-60 standard MMT (MPEG Media Transport) ) Method (for example, see Non-Patent Document 1) will be described.

  The transmission device 11 constitutes broadcasting equipment possessed by a broadcaster or the like. For example, the transmission device 11 is a radio wave transmission base station for a broadcaster or the like to transmit a broadcast wave. The transmission device 11 sequentially transmits program data and configuration information indicating the content of the broadcast program to the reception device 31 via the broadcast transmission path 12. The program data includes at least one of video data and audio data.

  The broadcast transmission path 12 is a transmission path for transmitting various data transmitted by the transmission apparatus 11 to a large number of reception apparatuses 31 simultaneously. The broadcast transmission path 12 may be a predetermined frequency relayed by the broadcast satellite 13, for example. Note that a part of the broadcast transmission path 12 may include a communication line.

The reception device 31 receives broadcast waves from the transmission device 11 via the broadcast transmission path 12. The receiving device 31 acquires video data, audio data, and configuration information from program data transmitted by broadcast waves. The receiving device 31 displays the video indicated by the acquired video data. In addition, the receiving device 31 reproduces sound (sound or music sound) indicated by the acquired sound data.
For example, the receiving device 31 is a television receiver, a video recording device (recorder), a smartphone, or the like. In the following description, information indicated by data (for example, video data) transmitted mainly for display on the receiving device 31 may be referred to as a “display element”.

The external device 41 is a device that stores video data. In the illustration of FIG. 1, the external device 41 </ b> A is a digital camera that stores video data indicating a photographic image. The external device 41B is an HDD (Hard Disc Drive) recorder that stores video data indicating recorded moving image content.
The external device 41 outputs the stored video data to the receiving device 31 based on a request from the receiving device 31.

  For example, the external device 41 may be a storage medium such as a USB (Universal Serial Bus) memory. In that case, video data is stored in advance in the storage medium. For example, the external device 41 may be a communication device for connecting to a communication network. In this case, the communication device acquires video data via the communication network and outputs the video data to the receiving device 31.

(Configuration of transmitter)
Next, the configuration of the transmission device 11 will be described.
FIG. 2 is a block diagram showing an example of the configuration of the transmission device 11 according to the first embodiment of the present invention.
The transmission apparatus 11 includes a program data acquisition unit 111, a configuration information acquisition unit 113, a multiplexing unit 114, an encryption unit 115, and a transmission unit 116.

The program data acquisition unit 111 acquires video data and audio data constituting a broadcast program.
The program data acquisition unit 111 acquires video data encoded by a predetermined video encoding method. For example, the predetermined video coding method is ISO / IEC 23008 HEVC (International Organization for Standardization / International Electrical Commission 230308 Part2 High Efficient Video Coding), which is also simply referred to as H coding code.

  The program data acquisition unit 111 acquires audio data encoded by a predetermined audio encoding method. For example, the predetermined audio encoding method is an audio encoding method defined by ISO / IEC 14496 Part 3 (also simply referred to as MPEG-4 audio. Note that MPEG is an abbreviation for Moving Picture Experts Group). is there.

  The program data acquisition unit 111 generates program data in a predetermined format from the acquired video data and audio data. The program data acquisition unit 111 outputs the generated program data to the multiplexing unit 114. For example, the program data in a predetermined format is an 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 acquisition unit 113 acquires configuration information. The configuration information is information that defines the components of a broadcast program and the components of a service provided by broadcasting. That is, the configuration information includes information defined for video assets and audio assets that configure a broadcast program. For example, the information defined for video assets and audio assets is information that defines a list of video assets and audio assets and various requirements for each video asset and audio asset.

  The configuration information is represented by data in a predetermined format. For example, the predetermined format is MMT-SI (MMT-System Information). The configuration information includes an MP table (MPT; MMT Package Table) and a layout setting table (LCT; Layout Configuration Table). MPT is data describing a list of assets and the like. LCT is data in which arrangement information indicating the display area of each asset is described. The configuration information acquisition unit 113 outputs the acquired configuration information to the multiplexing unit 114. The data structure of MPT and LCT will be described later.

  The multiplexing unit 114 multiplexes the program data input from the program data acquisition unit 111 and the configuration information input from the configuration information acquisition unit 113 to generate multiplexed data in a predetermined format. For example, the multiplexed data in a predetermined format is a TLV (Type Length Value) packet. The multiplexing unit 114 outputs the generated multiplexed data to the encryption unit 115.

  The encryption unit 115 encrypts the multiplexed data input from the multiplexing unit 114 using a predetermined encryption method. For example, the predetermined encryption method is AES (Advanced Encryption Standard) or MULTI2. The encryption unit 115 outputs the encrypted multiplexed data to the transmission unit 116.

  The transmission unit 116 transmits the multiplexed data input from the encryption unit 115 to the reception device 31 via the broadcast transmission path 12. Here, the transmission unit 116 modulates a carrier wave having a predetermined carrier frequency with multiplexed data that is a baseband signal. Transmitter 116 radiates a radio wave (broadcast wave) in a channel band corresponding to the carrier frequency through an antenna (not shown).

<Description of Protocol Stack Structure of System Using MMT>
The structure of the protocol stack of the system using MMT (MPEG Media Transport) will be described below.
FIG. 3 is a diagram illustrating an example of a structure of a protocol stack used by the broadcasting system 1 according to the first embodiment of the present invention.
As shown in FIG. 3, the protocol stack used in the broadcasting system includes TMCC (Transmission and Multiplexing Configuration Control), time information, encoded video data, encoded audio data, encoded subtitle data, MMT- It is configured to include applications described in SI and HTML5 standards (also simply referred to as applications), EPG (electronic program guide), content download data, and the like.

The code | symbol of the video signal and audio | voice signal of a broadcast program is MFU (Media Fragment Unit) / MPU. Then, the MFU / MPU is put on an MMTP (MMT Protocol) payload, converted into an MMTP packet by the transmission device 11, and transmitted by the transmission device 11 as an IP packet. In the transmission of data content, data is converted into MMTP packets by the transmission device 11 and transmitted by the transmission device 11 as IP packets.
When the IP packet configured in this way is broadcast using the broadcast transmission path 12, it is transmitted by the transmission device 11 in the form of a TLV packet. One IP packet or one IP packet compressed with one header is transmitted by the transmitter 11 as one TLV packet.

  Furthermore, in the protocol stack used for the broadcasting system 1, two types of control information, MMT-SI and TLV-SI, are provided. MMT-SI is control information indicating the configuration of a broadcast program. In MMT-SI, an MMT control message format is used, which is carried on the MMTP payload by the transmission device 11 to form an MMTP packet, and is transmitted by the transmission device 11 as an IP packet. TLV-SI is control information related to multiplexing of IP packets, and provides information for channel selection and correspondence information between IP addresses and services.

TMCC is control information that is inserted into a transmission frame and transmitted in a hierarchical modulation scheme that specifies a modulation scheme and an error correction scheme for each unit (slot) of a signal on a transmission path. HEVC (High Efficiency Video Coding) is a technique for encoding a video signal. AAC (Advanced Audio Coding) and ALS (Audio Lossless Coding) are methods for encoding audio signals. UDP / IP (User Datagram Protocol / Internet Protocol) is one of the protocols used for communication. TLV (TYPE LENGTH VALUE) is one of data multiplexing techniques.
TLV is composed of three types of data encoding: data type (Type), length (Length), and value (Value).

<Description of MMT-SI>
Hereinafter, MMT-SI (MMT-System Information) will be described.
The MMT-SI includes a message, a table, and a descriptor.
First, the MMT-SI message will be described.
The message includes a PA (Package Access) message, an M2 section message, a CA (Conditional Access) message, an M2 short section message, a data transmission message, and a message set by the operator. The PA message is control information for transmitting an MMT-SI table as an MMT-SI entry point. Note that 0x0000 is assigned to the identifier (hereinafter also referred to as message ID) of the PA message.

  The M2 section message is control information for transmitting a section extension format of MPEG-2 Systems. The M2 section message is assigned 0x8000 as the message ID.

  The CA message is control information for transmitting information related to the conditional access system. The broadcast received by limited reception is a broadcast that cannot be viewed on the receiving device 31 unless the broadcaster and the viewer have a viewing contract. The CA message is assigned 0x8001 as the message ID.

  The M2 short section message is control information for transmitting a section short format of MPEG-2 Systems. The M2 section message is assigned 0x8002 as the message ID.

The data transmission message is control information for transmitting a table related to data transmission. The data transmission message is assigned 0x8003 as the message ID.
The message set by the broadcaster is control information set by the broadcaster. In addition, 0xE000-0xEFFF and 0xF800-0xFFFF are assigned as message IDs to messages set by the operator.

Next, of the MMT-SI tables, tables used in the first embodiment of the present invention will be described.
The table includes an MP table (MPT; MMT Package Table), a layout setting table (LCT; Layout Configuration Table), and the like.

(MPT data structure)
The data structure of the MP table (MPT) will be described below. Note that MPT is a standard specified in Non-Patent Document 1 by ARIB (Association of Radio Industries and Businesses).
FIG. 4 is a diagram illustrating an example of a data structure of MPT received by the receiving device 31 according to the first embodiment of the present invention.
As shown in FIG. 4, 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. For example, hcv1 indicating video data encoded by HEVC is described in the asset type (asset_type). Further, for example, mp4a indicating audio data encoded with MPEG-4 audio is described in the asset type (asset_type).

  The asset descriptor area (asset_descriptors_byte) is an area in which a descriptor for each asset is described. An MPU display area designation descriptor (MPU_Presentation_Region_Descriptor ()) may be described in the area. The MPU display area designation descriptor is a descriptor for designating a display area of video data stored in the MPU.

  Note that uimsbf in the column of “data notation” in FIG. 4 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 fixed-length data used mainly for storing character codes.

(Data structure of LCT)
The data structure of the layout setting table (LCT) will be described below. Note that LCT is also a standard specified by ARIB in Non-Patent Document 1, as with MPT.
FIG. 5 is a diagram illustrating an example of a data structure of the LCT received by the receiving device 31 according to the first embodiment of the present invention.

  In LCT, one or a plurality of display areas are designated. In LCT, the number of layout devices (number_of_loop) is the number of layout / device pairs. Each layout is designated by a layout number (layout_number). For example, a layout number (layout_number) in which a value of “0” is described indicates a default layout, and a layout number (layout_number) in which a value of “1” or “2” is described indicates an effective layout.

  The output destination device is specified by a device ID (device_id). The output destination device is a device that displays a display element, for example, a display unit 319 (described later) of the receiving device 31. A device ID (device_id) in which a value of “0” is described indicates a main device.

The number of regions (number_of_region) indicates the number of display regions in one layout and device set. Each display area is designated by an area number (region_number). For example, an area number (region_number) in which a value of “0” is described indicates a default display area. The display area is designated by its upper left position and upper right position. The upper left position is specified by an upper left horizontal position (left_top_pos_x) and an upper left vertical position (left_top_pos_y). The lower right position is designated by a lower right horizontal position (right_down_pos_x) and a lower right vertical position (right_down_pos_y). Note that the percentage of the width of the entire display area is described as the upper left horizontal position (left_top_pos_x) and the lower right horizontal position (right_down_pos_x). Similarly, the percentage of the height of the entire display area is described as the upper left vertical position (left_top_pos_y) and the lower right vertical position (right_down_pos_y).
The LCT includes a descriptor area (descriptor ()).

Next, of the MMT-SI descriptors, the descriptors used in the first embodiment of the present invention will be described.
The descriptor includes an MPU display area designation descriptor (MPU_Presentation_Region_Descriptor ()) and the like.

(MPU display area specification descriptor data structure)
Next, the data structure of the MPU display area designation descriptor (MPU_Presentation_Region_Descriptor ()) will be described. Note that the MPU display area specification descriptor is also a standard defined by ARIB in Non-Patent Document 1, as in MPT and LCT.
As described above, the MPU display area designation descriptor is described for each asset in the asset descriptor area (asset_descriptors_byte) included in the MPT.
FIG. 6 is a diagram illustrating an example of a data structure of an MPU display area designation descriptor received by the receiving device 31 according to the first embodiment of the present invention.

  The MPU display area designation descriptor includes an MPU sequence number (mpu_sequence_number), a layout number (layout_number), and an area number (region_number). The MPU sequence number (mpu_sequence_number) stores a layout number (layout_number) included in this descriptor, a layout specified by an area number (region_number), and display elements (video data and character data) arranged in the display area. An MPU sequence number is described. Therefore, the display area for each display element is specified by this descriptor. Further, as described above, for example, the layout number (layout_number) specifies whether the display area is a default display area or an effective display area.

(Display area setting example)
Next, an example of setting a display area by LCT will be described.
7, 8, and 9 are diagrams illustrating setting examples of display areas displayed by the receiving device 31 according to the first embodiment of the present invention.

FIG. 7 shows a setting example of one default layout in which the main device is set as an output device.
As shown in FIG. 7A, in this example, the number of layout devices (number_of_loop), layout number (layout_number), device ID (device_id), and number of regions (number_of_region) are “1”, “0”, “0” and “1”.
In addition, the display area corresponding to the area number (region_number) “0” includes an upper left horizontal position (left_top_pos_x), an upper left vertical position (left_top_pos_y), a lower right horizontal position (right_down_pos_x), and a lower right vertical position (right_down_pos_pos_y_0). “0”, “100”, and “100” are designated.
The above designation indicates that the entire display area of the main device is one display area in the default layout. The display area associated with the area number (region_number) “0” corresponds to the display area “area 0” illustrated in FIG.

FIG. 8 shows a setting example of one effective layout in which the main device is set as an output device.
As shown in FIG. 8A, in this example, the number of layout devices (number_of_loop), the layout number (layout_number), the device ID (device_id), and the number of regions (number_of_region) are “1”, “1”, “0” and “3”. The three display areas are identified by area numbers (region_number) “0”, “1”, and “2”, respectively.

The display area corresponding to the region number (region_number) “0” includes an upper left horizontal position (left_top_pos_x), an upper left vertical position (left_top_pos_y), a lower right horizontal position (right_down_pos_x), and a lower right vertical position (right_pos_y) “0”. ”,“ 80 ”, and“ 80 ”.
The display area corresponding to the region number (region_number) “1” has an upper left horizontal position (left_top_pos_x), an upper left vertical position (left_top_pos_y), a lower right horizontal position (right_down_pos_x), a lower right vertical position (right_pos_80) “right_down_pos” ”,“ 100 ”, and“ 100 ”.
The display area corresponding to the region number (region_number) “2” includes an upper left horizontal position (left_top_pos_x), an upper left vertical position (left_top_pos_y), a lower right horizontal position (right_down_pos_x), a lower right vertical position (right_pos_y) “80” ”,“ 80 ”, and“ 100 ”.

  The display areas related to the area numbers (region_number) “0”, “1”, and “2” are the display areas of “area 0”, “area 1”, and “area 2” illustrated in FIG. Equivalent to. Note that “area 0”, “area 1”, and “area 2” illustrated in FIG. 8B are three display areas that do not overlap each other.

FIG. 9 shows an example of setting one effective layout in which the main device is set as an output device.
As shown in FIG. 9A, in this example, the number of layout devices (number_of_loop), layout number (layout_number), device ID (device_id), and number of regions (number_of_region) are “1”, “2”, “0” and “3”. The three display areas are identified by area numbers (region_number) “0”, “1”, and “2”, respectively.

The display area corresponding to the area number (region_number) “0” includes an upper left horizontal position (left_top_pos_x), an upper left vertical position (left_top_pos_y), a lower right horizontal position (right_down_pos_x), a lower right vertical position (right_down_pos_layer) “0”, “0”, “100”, “100”, “0” are designated.
The display area corresponding to the region number (region_number) “1” includes an upper left horizontal position (left_top_pos_x), an upper left vertical position (left_top_pos_y), a lower right horizontal position (right_down_pos_x), a lower right vertical position (right_down_layer_pos_layer_pos) “80”, “0”, “100”, “100”, “1” are designated.
The display area corresponding to the region number (region_number) “2” has an upper left horizontal position (left_top_pos_x), an upper left vertical position (left_top_pos_y), a lower right horizontal position (right_down_pos_x), a lower right vertical position (right_down_pos) “0”, “80”, “80”, “100”, “1” are designated.

The layer order (layer_order) indicates the relative position in the depth direction of the display area. “0” indicates an area to be presented in the last column, and the larger the number, the more front the presentation.
In the example of FIG. 9, the layer order (layer_order) of the display area associated with the area number (region_number) “0” is “0”. Further, the layer order (layer_order) relating to the display areas of the area numbers (region_number) “1” and “2” is “1”. Accordingly, the display areas of the area numbers (region_number) “1” and “2” are display areas in front of the display area related to the area number (region_number) “0”. Thus, for example, for a portion where the display area related to the area number (region_number) “0” and the display area related to the area number (region_number) “1” overlap, the display related to the area number (region_number) “1” The video displayed in the area is displayed.

  The display areas related to the area numbers (region_number) “0”, “1”, and “2” are the display areas of “area 0”, “area 1”, and “area 2” illustrated in FIG. Equivalent to. Note that “area 0” illustrated in FIG. 9B is the entire display area of the main device. Further, “area 1” and “area 2” illustrated in FIG. 9B are display areas that overlap the front surface of “area 0”.

(Setting example of MPU display area specification descriptor)
FIG. 10 is a diagram illustrating a setting example of the MPU display area designation descriptor set by the receiving device 31 according to the first embodiment of the present invention.
FIG. 10A shows a setting example corresponding to the default layout illustrated in FIG. In this setting example, “0” and “0” are designated as the layout number (layout_number) and the region number (region_number), respectively. The MPU sequence number related to the video V01 is designated as the MPU sequence number (mpu_sequence_number).
Therefore, the video V01 is assigned to the display area where the layout number (layout_number) and the area number (region_number) are “0” and “0”, respectively. In the default layout illustrated in FIG. 7, the entire display area of the main device is one display area. Therefore, the video V01 is displayed (full screen display) over the entire display area of the main device.

  FIG. 10B shows a setting example corresponding to the effective layout illustrated in FIG. In this setting example, a set of “1”, “0”, a set of “1”, “1”, a set of “1”, and “2” are designated as a layout number (layout_number) and a region number (region_number), respectively. Has been. As the MPU sequence number (mpu_sequence_number), the MPU sequence number related to the video V01 for the set of “1” and “0”, the MPU sequence number related to the video V02 for the set of “1” and “1” are “1”, The MPU sequence numbers related to the video V03 are designated for the group “2”.

Therefore, the video V01 is assigned to the display area where the layout number (layout_number) and the area number (region_number) are “1” and “0”, respectively.
The video V02 is assigned to the display area where the layout number (layout_number) and the area number (region_number) are “1” and “1”, respectively.
The video V03 is assigned to the display area where the layout number (layout_number) and the area number (region_number) are “1” and “2”, respectively.
Note that the symbols “V01”, “V02”, and “V03” described in the column of the MPU sequence number (mpu_sequence_number) in FIG. 10B are all described for the purpose of explanation. These codes are not actually specified as MPU sequence numbers (mpu_sequence_number).

(Receiver configuration)
Next, the configuration of the receiving device 31 will be described.
FIG. 11 is a block diagram showing an example of the configuration of the receiving device 31 according to the first embodiment of the present invention.

  The receiving device 31 includes a receiving unit 311, a decoding unit 312, a separation unit 313, an audio decoding unit 314, a reproduction unit 316, a video decoding unit 317 (317A, 317B), a video composition unit 318, a display unit 319, a storage unit 322, and an operation. An input unit 323, an external connection unit 324, and a control unit 331 are included.

  The receiving unit 311 (tuner) receives the broadcast wave transmitted from the transmission device 11 through an antenna (not shown) via the broadcast transmission path 12. The receiving unit 311 converts the received received signal into multiplexed data by down-converting the received signal into a baseband signal at the frequency of the channel specified by the channel selection signal input from the control unit 331. The receiving unit 311 outputs the converted multiplexed data to the decoding unit 312.

  The decryption unit 312 decrypts the multiplexed data (encrypted) input from the reception unit 311 with a decryption method (for example, AES) corresponding to the method used by the encryption unit 115 of the transmission device 11. The 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. Further, the separation unit 313 outputs the extracted video data to the video decoding units 317A and 317B or one of them.

Audio data is input from the separation unit 313 to the audio decoding unit 314. The voice decoding unit 314 decodes the input voice data. Decoding is performed by a decoding method corresponding to the encoding method used for encoding. Thereby, the voice decoding unit 314 generates original voice data. The decoded audio data is data indicating the audio level at each time. For example, the encoding method used for encoding is MPEG-4 audio. The audio decoding unit 314 outputs the decoded audio data to the reproduction unit 316.
The reproduction unit 316 reproduces audio based on the audio data input from the audio decoding unit 314. For example, the playback unit 316 includes a speaker.

  Video data is input from the separation unit 313 to the video decoding unit 317. The video decoding unit 317 decodes the input video data. Decoding is performed by a decoding method corresponding to the encoding method used for encoding. Thereby, the video decoding unit 317 generates original video data. The decoded video data is data indicating signal values forming a video (frame image) at each time. For example, encoding methods used for encoding are HEVC and MPEG-2 video. The video decoding unit 317 outputs the decoded video data to the video synthesis unit 318.

  Video data is input from the video decoding unit 317 to the video synthesis unit 318. In addition, display area information is input from the control unit 331 to the video composition unit 318. The video composition unit 318 synthesizes a video for display (display video) by arranging a video based on the video data in a display area specified by the display area information. The video synthesis unit 318 outputs display video data indicating the synthesized display video to the display unit 319.

  Note that alternative display video data may be input from the control unit 331 to the video synthesis unit 318. In that case, the video composition unit 318 arranges the video based on the video data for alternative display in the display area specified by the display area information. Note that the control unit 331 acquires video data for alternative display from the external connection unit 324 or the storage unit 322.

  In addition, image data indicating various images (for example, notification images, setting menu screens, and the like) may be input from the control unit 331 to the video composition unit 318. In that case, the video composition unit 318 generates a display video in which the image indicated by the input image data is further superimposed on the above-described display video.

  The display unit 319 displays a video based on the video data input from the video composition unit 318. For example, the display unit 319 includes a liquid crystal display, an organic EL (Electroluminescence) display, and the like. The display unit 319 displays the video specified by the display area information in each display area based on the layout of the display area specified by the display area information.

  The storage unit 322 stores various data and programs. For example, the storage unit 322 stores alternative display video data, notification image data, and the like in advance. The storage unit 322 is a storage medium. For example, the storage unit 322 includes an HDD (Hard Disk Drive), a flash memory, an EEPROM (Electrically Erasable Programmable Read Only Memory), a ROM (Read Only Memory / Read Only Memory), and a RAM (Random Read / Write Memory). Memory), or any combination thereof.

The operation input unit 323 receives an operation input by a user of the receiving device 31. The operation input unit 323 generates an operation signal generated based on the received operation input. The operation input unit 323 outputs the generated operation signal to the control unit 331.
For example, the operation signal generated by the operation input unit 323 is a signal indicating power on / off, a signal indicating a broadcast wave channel, and the like. The operation input unit 323 is, for example, an input interface that receives an operation signal from an operation button, a remote controller, a portable terminal, or the like.

  The external connection unit 324 is an interface for acquiring video data for alternative display. The external connection unit 324 receives video data for alternative display from the external device 41. For example, the external connection unit 324 is a USB (Universal Serial Bus) connection terminal, an HDMI (registered trademark) (High-Definition Multimedia Interface) connection terminal, a communication interface for network connection, and the like. .

In the illustration of FIG. 11, the external connection unit 324 is connected to two external devices, the external device 41A and the external device 41B.
The external connection unit 324 acquires video data for alternative display from the external device 41 (41A or 41B) designated by the control unit 331. The external connection unit 324 outputs the acquired video data to the control unit 331.

The control unit 331 includes a computer (CPU). The control unit 331 executes software (program) stored in the storage unit. Thereby, the control unit 331 controls various operations of the receiving device 31.
For example, the control unit 331 acquires configuration information from the separation unit 313. The control unit 331 extracts a list of video data and arrangement information from the acquired configuration information. The arrangement information indicates the display area of each video based on the video data. The control unit 331 outputs display area information indicating a display area for each video to the video composition unit 318.
For example, the control unit 331 acquires substitute display video data from the external device 41 based on a result of analyzing the acquired configuration information. The control unit 331 outputs the acquired video data for alternative display to the video composition unit 318.

(Configuration of control unit)
Next, the configuration of the control unit 331 will be described in more detail.
FIG. 12 is a block diagram showing an example of the configuration of the control unit 331 according to the first embodiment of the present invention.
The control unit 331 includes an arrangement information acquisition unit 3311, a comparison unit 3312, an output control unit 3313, an external input control unit 3314, a notification control unit 3315, and a channel selection control unit 3316.

The arrangement information acquisition unit 3311 extracts MPT and LCT from the configuration information input from the separation unit 313. The arrangement information acquisition unit 3311 analyzes the extracted MPT and LCT, and specifies a display element (video) and a display area for each display element.
Specifically, the arrangement information acquisition unit 3311 displays the upper left horizontal position (left_top_pos_x), upper left as a display area for each set of layout number (layout_number), device ID (device_id), and area number (region_number) described in the LCT. A vertical position (left_top_pos_y), a lower right horizontal position (right_down_pos_x), and a lower right vertical position (right_down_pos_y) are specified.
The arrangement information acquisition unit 3311 specifies, for example, the video composition unit 318 connected to the display unit 319 as an output destination based on the device ID (device_id).

On the other hand, the arrangement information acquisition unit 3311 detects the MPU display area designation descriptor (MPU_Presentation_Region_Descriptor ()) described in the asset descriptor area of the MPT among the configuration information input from the separation unit 313. The arrangement information acquisition unit 3311 stores the MPU sequence number (MPU sequence number) of the MPU that stores data (video data) indicating the display element for each set of layout number (layout_number) and region number (region_number) from the detected MPU display region designation descriptor. mpu_sequence_number). The arrangement information acquisition unit 3311 outputs to the output control unit 3313 display region information indicating a display region for each display element specified by a combination of a layout number (layout_number) and a region number (region_number). The display area information includes presentation attribute information (for example, distinction between default, valid, etc.) represented by a layout number (layout_number) for each display element.
The arrangement information acquisition unit 3311 outputs to the comparison unit 3312 information indicating the display element (video) and the display area for each display element obtained by the above analysis.

The comparison unit 3312 performs the following comparison processing based on the display element (video asset) acquired from the arrangement information acquisition unit 3311 and information indicating the display area for each display element.
The comparison unit 3312 compares the number of display elements (video assets) with the number of display areas. For example, if the number of display areas is larger than the number of display elements, there is a display area to which no display element is assigned (that is, a display area in which no video is displayed).

  In addition, the comparison unit 3312 determines whether all input video assets are decodable due to limitations on the decoding capability of the receiving device 31 (for example, the number and performance of the video decoding units 317). That is, in this example, the comparison unit 3312 compares the number of video decoding units 317 (317A, 317B) that can decode display elements (video assets) with the number of display elements (number of video assets). . For example, in the information acquired by the comparison unit 3312 from the arrangement information acquisition unit 3311, it is assumed that the number of display areas is 2, and that each display area is associated with a display element (video asset) indicating 8K video. Further, it is assumed that the video decoding unit 317 provided in the receiving device 31 is two, the video decoding unit 317A can decode 8K video, but the video decoding unit 317B cannot decode 8K video. In this case, since the video decoding unit 317B cannot decode the video data, there is a display area where no video is displayed.

  For example, in the information acquired from the arrangement information acquisition unit 3311 by the comparison unit 3312, the number of display areas is 3, and each display area is associated with a video asset (display element) indicating 4K video. To do. In addition, it is assumed that there are two video decoding units 317 included in the receiving device 31, and both the video decoding unit 317A and the video decoding unit 317B can decode 4K video. In that case, the video decoding unit 317A and the video decoding unit 317B can decode any video asset. However, since the number of video assets is 3, the number of video decoding units 317 is two and one is insufficient, so that the video decoding unit 317 decodes one of the three video assets. I can't. Therefore, there is a display area where no video is displayed.

  The comparison unit 3312 outputs the display element (video) acquired from the arrangement information acquisition unit 3311, information indicating the display area for each display element, and information based on the comparison result to the output control unit 3313. The information based on the above comparison result indicates the number of display areas where video received by broadcast waves cannot be displayed, and the display position and display size of display areas where video received by broadcast waves cannot be displayed. Information etc. are included.

  In the case where there is a display area where video received by broadcast waves cannot be displayed, the receiving device 31 according to the first embodiment uses the external device 41 or the video data for alternative display stored in the storage unit 322 in advance. Can be placed in its display area instead.

When there is a display area in which a video received by broadcast waves cannot be displayed, the output control unit 3313 acquires information indicating an available external device from the external input control unit 3314. The usable external device 41 is an external device in which alternative display video data is stored in advance.
The output control unit 3313 outputs information indicating the available external device 41 to the notification control unit 3315.

  The notification control unit 3315 generates an image indicating the alternative display video selection screen based on the acquired information indicating the available external device 41. The alternative display video selection screen is a menu screen for allowing the user of the receiving device 31 to select the external device 41 or the storage unit 322 that acquires video data for alternative display. The notification control unit 3315 outputs an image indicating the generated alternative display video selection screen to the video composition unit 318.

  FIG. 13 is a schematic diagram illustrating an example of an alternative display video selection screen displayed by the receiving device 31 according to the first embodiment of the present invention. On the alternative display video selection screen shown in FIG. 13, the character strings “USB memory”, “external input 1”, “external input 2”, and “still image” are displayed. The receiving apparatus 31 in this example indicates that a USB memory is connected to the USB connection terminal, and an external device is connected to each of the two external input terminals. In the USB memory and each external device, video data for alternative display is stored in advance, indicating that it is in a usable state. The storage unit 322 stores alternative display video data (still image) in advance, and indicates that it can be used.

  The notification control unit 3315 obtains information indicating the external device 41 or the storage unit 322 selected on the alternative display video selection screen by the user via the operation input unit 323. The notification control unit 3315 outputs information indicating the external device 41 or the storage unit 322 selected on the substitute display video selection screen by the user to the output control unit 3313.

The output control unit 3313 acquires video data for alternative display from the external device 41 or the storage unit 322 selected by the user in accordance with the information input from the notification control unit 3315.
The output control unit 3313 outputs to the video composition unit 318 information indicating that a video based on the video data for alternative display is displayed instead of the display area where the video received by the broadcast wave cannot be displayed.

  The channel selection control unit 3316 selects a channel that receives a broadcast wave according to the operation signal input from the operation input unit 323. The channel selection control unit 3316 outputs a channel selection signal indicating the selected channel to the reception unit 311.

FIG. 14 is a schematic diagram illustrating an outline of the operation of the reception device 31 according to the first embodiment of the present invention.
The MPT shown in FIG. 14 indicates that four assets (audio asset or video asset) are included. In FIG. 14, assets with asset IDs “1”, “3”, and “4” are video assets. An asset with an asset ID “2” is a voice asset.

In the present embodiment, the receiving device 31 includes three decoders (decoding units). Of the three decoders, two are video decoders for decoding video data, and one is an audio decoder for decoding audio data.
At this time, the output control unit 3313 assigns the decoders, for example, in order from assets with smaller asset ID values. That is, first, a video asset with the asset ID “1” is assigned to the first video decoder. Next, the audio asset with the asset ID “2” is assigned to the audio decoder. Next, the video asset with the asset ID “3” is assigned to the second video decoder.

As described above, assets are assigned to all three decoders included in the reception device 31. Therefore, the receiving apparatus 31 cannot decode the video asset having the asset ID “4” specified in “area 2 (region_number = 2)” in MPT. This is because the number of video decoders is insufficient with respect to the number of video assets.
In such a case, the receiving device 31 displays video data for alternative display acquired from an external device or the like on “area 2” where video acquired from broadcast waves cannot be displayed.

(Receiver operation)
Next, the operation of the receiving device 31 will be described.
FIG. 15 is a flowchart illustrating an example of the operation of the reception device 31 according to the first embodiment of the present invention.
In this flowchart, the processing is started after the reception unit 311 receives the broadcast wave transmitted by the transmission device 11 via the broadcast transmission path 12.

(Step S101) The separation unit 313 detects configuration information from the multiplexed data decoded by the decoding unit 312 and separates the detected configuration information. The separation unit 313 outputs the separated configuration information to the arrangement information acquisition unit 3311 of the control unit 331. Thereafter, the process proceeds to step S102.

(Step S102) The arrangement information acquisition unit 3311 extracts and analyzes LCT and MPT from the acquired configuration information. The arrangement information acquisition unit 3311 outputs information indicating the display element (video asset) and the display area for each display element obtained by the analysis to the comparison unit 3312. Thereafter, the process proceeds to step S103.

(Step S103) The comparison unit 3312 compares the number of display elements (the number of video assets) and the number of display areas based on the information acquired from the arrangement information acquisition unit 3311. If the number of display areas is the same as the number of video assets and the number of display areas is smaller than the number of video assets, the process proceeds to step S104. Otherwise (when the number of display areas is greater than the number of video assets), the process proceeds to step S106.

(Step S <b> 104) The comparison unit 3312 determines whether all input video assets can be decoded due to limitations on the decoding capability (for example, the number and performance of the video decoding units 317) of the receiving device 31 thereof. To do. That is, in this example, the comparison unit 3312 determines the number of video decoding units 317 (317A, 317B) that can decode the display elements (video assets) based on the information acquired from the arrangement information acquisition unit 3311, and the display elements. Compare numbers (number of video assets).
If the number of decodable video decoding units 317 is the same as the number of display elements (number of video assets) or the number of decodable video decoding units 317 is larger than the number of display elements (number of video assets), the process proceeds to step S105. move on. Otherwise (that is, when the number of decodable video decoding units 317 is smaller than the number of display elements (the number of video assets)), the process proceeds to step S106.

(Step S <b> 105) The output control unit 3313 displays each video image associated with each display area by the MPU presentation area designation descriptor in all display areas indicated by the LCT. Above, the process of this flowchart is complete | finished.

(Step S106) The output control unit 3313 searches for an available external device. Thereafter, the process proceeds to step S107.

(Step S107) Based on the search result of the output control unit 3313, the notification control unit 3315 presents a selection screen so that the user can select from a list of external devices. The operation input unit 323 receives an operation input from the user and outputs information indicating the selected external device to the output control unit 3313. Based on the input information, the output control unit 3313 determines an external device that acquires video data for alternative display. Thereafter, the process proceeds to step S108.

(Step S108) The output control unit 3313 displays the broadcast wave image in the display area where the broadcast wave image can be displayed. The output control unit 3313 displays a substitute display image acquired from the external device selected by the user in a display area where a broadcast wave image cannot be displayed. Above, the process of this flowchart is complete | finished.

  As described above, according to the receiving device 31 according to the first embodiment of the present invention, the video and audio designated in the display area based on the layout setting table (LCT) sent from the broadcast station are received. Even if it cannot be output to the screen due to the limitations of the machine's performance, video from an external device can be output to that area.

(Second Embodiment)
In the first embodiment, when the number of display areas greater than the number of video decoding units 317 included in the reception device 31 is specified in the display area information, the reception device 31 displays video data for alternative display. The video based on the is acquired from the external device 41 or the storage unit 322.
In the second embodiment, when the performance of the video decoding unit 317 included in the reception device 31 does not have the ability to decode the received video data, the reception device 31 is based on the video data for alternative display. The video is acquired from the external device 41 or the storage unit 322.

  For example, it is assumed that one of the video data that the receiving device 31 acquires from a broadcast wave is an 8K content video. In addition, it is assumed that the video decoding unit 317 included in the reception device 31 does not have the capability of decoding 8K content video. In that case, the video is not displayed in the display area for displaying the video of the 8K content specified by the display area information. In such a case, the receiving device 31 according to the second embodiment acquires and displays a video based on the video data for alternative display from the external device 41 or the storage unit 322. According to the present embodiment, video can be displayed even when the receiving device 31 does not support high-resolution, for example, 8K content.

(Third embodiment)
In the third embodiment, when the receiving device 31 acquires video data for alternative display from the external device 41 or the storage unit 322, the output control unit 3313 displays the size of the video based on the acquired video data in the display area. Adjust the size to match the size of.
FIG. 16 is a schematic diagram illustrating an example of an image displayed by the receiving device 31 according to the third embodiment of the present invention.

In the illustration of FIG. 16, the vertical length of the video based on the video data stored in the external device 41 is longer than the vertical length of the display area (area 2). Therefore, the output control unit 3313 of the control unit 331 reduces the vertical length of the video based on the video data so as to be equal to the vertical length of the display region (region 2). Thereby, the entire video based on the video data is displayed in the display area (area 2).
As described above, the control unit 331 of the receiving device 31 according to the third embodiment displays the display size of the third video content (video based on the video data for alternative display) so as to fit in the display area based on the arrangement information. Can be adjusted.

(Fourth embodiment)
In the fourth embodiment, when the reception device 31 acquires video data for alternative display from the external device 41 or the storage unit 322, the output control unit 3313 displays the size of the video based on the acquired video data. The size is adjusted to the size displayed on the full screen in the section 319.
FIG. 17 is a schematic diagram illustrating an example of an image displayed by the receiving device 31 according to the fourth embodiment of the present invention.

In the illustration of FIG. 17, the vertical length or horizontal length of the video based on the video data stored in the external device 41 is the vertical length or horizontal length of the entire screen of the display unit 319, respectively. Shorter than length. Therefore, the output control unit 3313 of the control unit 331 makes the vertical length and horizontal length of the video based on the video data equal to the vertical length and horizontal length of the entire screen. Expanding. And the output control part 3313 displays only the part of a display area (area | region 2) among the expanded images.
As described above, the control unit 331 of the reception device 31 according to the fourth embodiment adjusts the size of the third video content (video based on video data for alternative display) so as to be equal to the full screen size. A part of the third video content (video based on video data for alternative display) can be displayed in the display area based on the arrangement information.

(Fifth embodiment)
In the fifth embodiment, when the receiving device 31 acquires video data for alternative display from the external device 41 or the storage unit 322, the output control unit 3313 adjusts the size of the video based on the acquired video data. To display in the specified display area.
FIG. 18 is a schematic diagram illustrating an example of an image displayed by the receiving device 31 according to the fourth embodiment of the present invention.

In the example of FIG. 18, the vertical length of the video based on the video data stored in the external device 41 is longer than the vertical length of the display area (area 2). Therefore, a part of the video based on the alternative display video data is displayed in the display area (area 2).
In the above case, the receiving device 31 in the fifth embodiment changes the range displayed in the video display area (area 2) based on the video data for alternative display according to the designation from the user. be able to. That is, in the illustration of FIG. 18, the receiving device 31 can move the video display range based on the video data for alternative display up and down in accordance with the designation from the user.
As described above, the control unit 331 of the receiving device 31 according to the fifth embodiment displays the third video content to be displayed in the display area based on the arrangement information according to the designation from the user of the receiving device 31 of itself. The display portion of (video based on video data for alternative display) can be changed.

(Sixth embodiment)
In the sixth embodiment, when the receiving device 31 acquires video data for alternative display from the external device 41 or the storage unit 322, the output control unit 3313 has the same aspect ratio as the aspect ratio of the display area. Video data for alternative display indicating video is acquired. Then, the output control unit 3313 adjusts the size of the video based on the acquired video data so as to be the same as the size of the display area.
FIG. 19 is a schematic diagram illustrating an example of an image displayed by the receiving device 31 according to the sixth embodiment of the present invention.

In the illustration of FIG. 19, there is one piece of video data indicating a video having the same aspect ratio as the display region (region 2). The receiving device 31 acquires the video data from the external device 41. The size of the video indicated by the acquired video data is smaller than the size of the display area (area 2). Therefore, the output control unit 3313 increases the size of the video based on the acquired video data so as to be the same as the size of the display area (area 2). Thereby, the video based on the video data is displayed in the entire display area (area 2).
As described above, the control unit 331 of the reception device 31 according to the sixth embodiment has the third video content (video based on video data for alternative display) having the same aspect ratio as the display area based on the arrangement information. Can be displayed in the display area based on the arrangement information.

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 addition, you may make it implement | achieve part or all of 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 receiving device 31 and includes an OS and hardware such as 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.

  Further, 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 receiving device 31 in the above-described embodiment may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each functional block of the receiving device 31 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, 111 ... Program data acquisition part, 113 ... Configuration information acquisition part, 114 ... Multiplexing part, 115 ... Encryption part, 116. ..Transmission unit, 12 ... broadcast transmission path, 13 ... broadcast satellite, 31 ... reception device, 311 ... reception unit, 312 ... decoding unit, 313 ... separation unit, 314 ..Audio decoding unit, 316... Playback unit, 317... Video decoding unit (317A, 317B), 318... Video synthesis unit, 319. ..Operation input unit, 324 ... external connection unit, 331 ... control unit, 3311 ... arrangement information acquisition unit, 3312 ... comparison unit, 3313 ... output control unit, 3314 ... external Input control unit, 3315 ... notification control unit, 3316 ... channel selection control unit

Claims (9)

A receiver for receiving broadcast waves;
A control unit including a comparison unit;
A display unit;
With
The comparison unit compares the number of video assets in the asset included in the broadcast wave configuration information with the number of display areas, and the video that can be decoded by the receiving apparatus in the asset included in the broadcast wave configuration information. Comparing at least one of the number of assets and the number of display areas,
Based on the result of the comparison, displaying video content other than the video asset in a partial area of the display unit;
A receiving device. Comprising an acquisition unit for acquiring video content other than the video asset from at least one external device;
The receiving apparatus according to claim 1. An acquisition unit for acquiring video content other than the video asset from at least one external device;
A storage unit for storing the video content;
With
The control unit acquires the video content from the external device or the storage unit;
The receiving apparatus according to claim 1, wherein: The control unit adjusts a display size of the video content so as to fit in a partial area of the display unit;
The receiving apparatus according to claim 1. The control unit adjusts the size of the video content so as to fit within a full screen size of the display unit, and displays a part of the video content in a partial region of the display unit;
The receiving apparatus according to claim 1. The control unit is configured to change a display part of the video content to be displayed in a partial area of the display unit;
The receiving apparatus according to claim 1. The control unit displays the video content having the same aspect ratio as the partial area of the display unit in the partial area of the display unit;
The receiving apparatus according to claim 1. A receiving step for receiving broadcast waves;
A control step including a comparison step;
A display step;
Have
In the comparison step, a comparison between the number of video assets in the asset included in the broadcast wave configuration information and the number of display areas, and a video that can be decoded by the receiving apparatus in the asset included in the broadcast wave configuration information Comparing at least one of the number of assets and the number of display areas,
Based on the result of the comparison, displaying video content other than the video asset in a partial area of the area displayed in the display step;
A receiving method characterized by the above. On the computer,
A receiving step for receiving broadcast waves;
A control step including a comparison step;
A display step;
In the comparison step, a comparison between the number of video assets in the asset included in the broadcast wave configuration information and the number of display areas, and a video that can be decoded by the receiving apparatus in the asset included in the broadcast wave configuration information Comparing at least one of the number of assets and the number of display areas,
Based on the result of the comparison, displaying video content other than the video asset in a partial area of the area displayed in the display step;
A program for running

Images