JP2016134720A - Receiving device, reception method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize adjustment of a presentation area desired by a user while paying regard to a presentation area intended by a broadcasting company or the like.SOLUTION: A receiving device comprises: a receiver which receives reception data by broadcast waves; an acquisition unit which acquires a display element including characters and arrangement information indicating the presentation area of the display element, from the reception data; a notification unit which, when an effective arrangement information is acquired, gives notification that the presentation area is variable in accordance with an operation; and a display controller which changes the presentation area of the display element from the presentation area indicated by the arrangement information, in accordance with an operation. This invention can be performed as a reception method and a program in addition to the receiving device.SELECTED DRAWING: Figure 12

Description

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

  In television broadcasting, components (components, element information) such as a plurality of videos and characters may be multiplexed at the same time due to broadcast waves, not limited to one video. Conventionally, each component has been displayed in a display area predetermined by a broadcaster or a program producer (hereinafter referred to as a broadcaster or the like). Some receiving apparatuses can change each display area according to the user's operation and the size of the display area.

For example, in Patent Document 1, in the reduced display of data broadcasting, a text broadcast display area is determined, a focus display is performed, and the focus area is selected with a remote controller so that the text area is enlarged to the original size. A screen display device is described. In addition, the multi-screen display device can be operated with a remote control button that unifies the remote control operation and the data broadcast screen operation when the data broadcast screen is reduced by matching the color of the focus part to the color of the remote control with color buttons. It is said.
Patent Document 2 describes a data broadcast display device that adjusts the arrangement of presentation elements and presents them even when presentation elements are difficult to present due to the constraints of the receiver.

JP 2002-171457 A JP 2010-239506 A

  However, there is a problem that the screen size and layout intended by the broadcaster or the like are not necessarily the screen size and layout desired by the user. For example, in the multi-screen display device described in Patent Document 1, the original size enlarged by the remote control operation is not always the size desired by the user. Further, the data broadcast display device described in Patent Literature 2 adjusts the arrangement so that a plurality of presentation elements do not overlap each other, but the adjusted arrangement of the presentation elements is not necessarily a user-desired position.

  The present invention has been made to solve the above-described problems, and one aspect of the present invention includes a receiving unit that receives received data by broadcast waves, a display element that includes characters from the received data, and the display An acquisition unit that acquires arrangement information indicating a presentation area of an element, a notification unit that notifies that the presentation area is variable according to an operation when valid arrangement information is acquired, and a presentation area of the display element A display control unit that changes according to an operation from the presentation area indicated by the arrangement information.

  ADVANTAGE OF THE INVENTION According to this invention, after respecting the presentation area | region which the broadcaster etc. intended, adjustment of a user's desired presentation area is realizable.

It is a block diagram which shows the structure of the broadcast system which concerns on 1st Embodiment. It is a block diagram which shows the structure of the transmitter which concerns on 1st Embodiment. It is a figure which shows the example of MPT. It is a figure which shows the example of MH-data encoding system descriptor. It is a figure which shows the example of MFU. It is a figure which shows the example of additional identification information. It is a figure which shows the example of LCT. It is a figure which shows the example of a MPU presentation area | region designation | designated descriptor. It is a figure which shows the example of a setting of a presentation area | region. It is a figure which shows the example of a setting of a MPU presentation area | region designation | designated descriptor. It is a block diagram which shows the structure of the receiver which concerns on 1st Embodiment. It is a block diagram which shows the structure of the control part which concerns on 1st Embodiment. It is a figure which shows an example of a display image. It is a figure which shows an example of a notification image. It is a figure which shows an example of character area setting data. It is a figure which shows the other example of a display image. It is a flowchart which shows the reception process which concerns on 1st Embodiment. It is a figure which shows the other example of a display image. It is a block diagram which shows the structure of the receiver which concerns on 2nd Embodiment. It is a block diagram which shows the structure of the control part which concerns on 2nd Embodiment. It is a figure which shows the other example of a display image. It is a figure which shows the other example of a display image. It is a figure which shows the other example of a notification image. It is a figure which shows the other example of a display image.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a broadcasting system 1 according to the present embodiment. The broadcast system 1 includes a transmission device 11 and a reception device 31. The transmission device 11 constitutes, for example, broadcasting equipment possessed by a broadcaster or the like. 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. A broadcast program may be multiplexed with character data. In that case, the receiving device 31 displays the character indicated by the multiplexed character data in a superimposed manner on the video. The receiving device 31 is installed, for example, in each home or business office.

  The transmission device 11 transmits multiplexed data obtained by multiplexing program data representing the content of the broadcast program and character data to the reception device 31 via the broadcast transmission path 12. The program data includes, for example, audio data and video data. Character data is data including character information. The character information is information representing characters provided by character multiplex broadcasting, and is also called timed text. Character multiplex broadcasting includes subtitle broadcasting and character supervision. Subtitle broadcasting is broadcasting synchronized with a main program including video and audio. A character supermarket is a broadcast that is not synchronized with the main program, and is also called asynchronous subtitles.

  The broadcast transmission path 12 is a transmission path for transmitting various data transmitted by the transmission apparatus 11 to an unspecified number of reception apparatuses 31 in one direction at the same time. 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. 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.

  The reception device 31 receives broadcast waves from the transmission device 11 via the broadcast transmission path 12. The receiving device 31 acquires program data and character data from the multiplexed data transmitted by the broadcast wave. The receiving device 31 acquires video data and audio data from the program data. The receiving device 31 displays the video indicated by the acquired video data and the characters indicated by the character data, and reproduces the audio indicated by the acquired audio data. The receiving device 31 is an electronic device having a function capable of receiving broadcast waves of television broadcasting, such as a television receiving device, a video recording device, and a smartphone. In the following description, information represented by data (for example, video data, character data, etc.) transmitted mainly for display on the receiving device 31 is collectively referred to as “display element”.

(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 illustrating a configuration of the transmission device 11 according to the present embodiment. The transmission device 11 includes a program data acquisition unit 111, a character data acquisition unit 112, 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 indicating video composing a broadcast program and audio data indicating audio. The program data acquisition 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 Electrical Commission 230308, also called Part 2 High Efficient Video Coding).

  The program data acquisition 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). The program data acquisition 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 114. 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 character data acquisition unit 112 acquires character data transmitted by character multiplex broadcasting. The character data is data in a predetermined format including character information indicating characters provided by character multiplex broadcasting and setting information indicating their display mode. The data in a predetermined format is data in a data format described in, for example, TTML (Timed Text Markup Language). The setting information includes structural information indicating the arrangement direction (vertical, horizontal) and the like as elements, and modification information such as character size (font size) and color. TTML is a description language that describes these setting information by enclosing them with a predetermined character string (tag). Each element of the setting information may be referred to as an attribute. In TTML, characters to which setting information is applied are specified by surrounding them between a start tag and an end tag. In TTML, not all elements of the setting information are necessarily included and are arbitrary. The TTML is described in detail in, for example, the following source ("Timed Text Markup Language 1 (TTML1) (Second Edition)", [online], W3C, [December 22, 2014 search], Internet <URL: http://www.w3.org/TR/2013/REC-ttml1-20130924/>).
The character data acquisition unit 112 outputs the acquired character data to the multiplexing unit 114.

  The configuration information acquisition unit 113 acquires configuration information related to components of services provided by broadcasting, such as broadcast programs and text multiplex broadcasting. The configuration information includes assets that are components such as broadcast programs and text multiplex broadcasting, that is, a list of video, audio, text information, and the like, and information indicating their requirements. The configuration information is represented by data in a predetermined format (for example, MMT-SI: MMT-System Information, etc.). The configuration information includes an MP table (MPT: MMT Package Table) and a layout setting table (LCT: Layout Configuration Table). The MPT is data describing an asset list, information indicating a service type such as text broadcasting or text super, and the like. The LCT is data in which arrangement information indicating the presentation 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, the character data input from the character data acquisition unit 112, and the configuration information input from the configuration information acquisition unit 113 to obtain a predetermined format ( For example, multiplexed data of TLV (Type Length Value packet) is generated. 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, AES: Advanced Encryption Standard). 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 transmitting unit 116 modulates a carrier wave having a predetermined carrier frequency by using multiplexed data that is a baseband signal, and transmits a radio wave (broadcast wave) in a channel band corresponding to the carrier frequency by an antenna (not shown). Radiate.

(MPT data structure)
Next, the data structure of MPT will be described. FIG. 3 is a diagram illustrating an example of MPT. In the example illustrated in FIG. 3, MPT (MMT Package Table) 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. As the asset type (asset_type), for example, one of hcv1 indicating video data encoded by HEVC, mp4a indicating audio data encoded by MPEG-4 audio, and stpp indicating character data (timed text) is selected. Described.

  The asset descriptor area (asset_descriptors_byte) is an area in which a descriptor for each asset is described. In this area, an MH-data encoding scheme descriptor (MH-Data_Component_Descriptor ()) and an MPU presentation area designation descriptor (MPU_Presentation_Region_Descriptor ()) may be described. The MPU presentation area designation descriptor is a descriptor for designating a presentation area for video data, character data, and the like stored in an MPU that stores video data, character data, and the like. The MH-data encoding scheme descriptor is a descriptor used for identifying character data and a data encoding scheme for encoding various data attached to the character data.

(MH-Data encoding scheme descriptor data structure)
Next, the data structure of the MH-data encoding scheme descriptor will be described.
FIG. 4 is a diagram illustrating an example of the MH-data encoding scheme descriptor. In the example illustrated in FIG. 4, the MH-data encoding scheme descriptor (MH-Data_Component_Descriptor ()) includes data encoding scheme identification (data_component_id) and additional identification information (additional_data_component_info). For character data, for example, the code “0x0020” is described as the data encoding method identification (data_component_id). The code “0x0020” indicates a caption encoding method in digital broadcasting.

In the additional identification information (additional_data_component_info), additional identification information (Additional_Arib_Subtitle_Info ()) of the caption / character super transmission system having the data structure shown in FIG. 5 is described.
The additional identification information (Additional_Arib_Subtitle_Info ()) includes a caption identification tag (subtitle_tag), a language code (ISO_639_language_code), a caption type (type), a caption description format identification (subtitle_format), and a start MPtum sequence. The The subtitle identification tag (subtitle_tag) is a label for identifying a subtitle broadcast and a text super stream. The language code (ISO_639_language_code) indicates a language identified by the caption identification tag. The caption type (type) indicates a service type, that is, a distinction between caption broadcasting and text super. When a subtitle broadcast is provided, a code “00” is described as a subtitle type (type), and when a superimposing character is provided, a code “01” is described as a subtitle type (type). As the caption description method identification (subtitle_format), a code “0000” indicating the TTML description method is described. The start MPU sequence number (start_mpu_sequence_number) indicates the first MPU sequence number of character data for which the setting by this descriptor is valid.

  Next, the data structure of the MPU for storing character data will be described. In the processing of character data, it becomes a processing unit for the MPU to display or reproduce. The MPU includes character data to be presented in a certain time range. The MPU may include either or both of an audio file and an image file related to the character data. One MPU includes one or a plurality of MFUs (Media Fragment Units) and an MPU sequence number. Character data is always included as sub-sample data in the first MFU constituting the MPU of caption and character superimposition. The MPU sequence number is a number for identifying each MPU.

(Data structure of MFU)
Next, the data structure of MFU will be described. FIG. 6 is a diagram illustrating an example of the MFU. The MFU includes a caption identification tag (subtitle_tag), a caption sequence number (subtitle_sequence_number), a subsample number (subsample_number), a final subsample number (last_subsample_number), and a data type (data_type) and data type (data_type).
The caption sequence number (subtitle_sequence_number) is a sequence number in the entire caption data transmitted with the asset, and is a number incremented between successive MPUs. The subsample number (subsample_number) is a number expressed in ascending order of the MFU storing the subsample of data in the MPU. The number of the first subsample in each MPU is zero. The last subsample number (last_subsample_number) is the last subsample number of data transmitted by the MPU. The data type (data_type) is a data type of data stored in the MFU. For example, when character data described in the TTML description method is stored, the code “0000” is described as the data type (data_type). The data byte (data_byte) is an area in which character data to be transmitted is stored in the MFU.

(Data structure of LCT)
Next, the data structure of LCT will be described. FIG. 7 is a diagram illustrating an example of LCT. In LCT, one or a plurality of presentation 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” 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 areas (number_of_region) indicates the number of presentation areas in one layout and device set. Each presentation area is specified by an area number (region_number). For example, an area number (region_number) in which a value of “0” is described indicates a default presentation area. The presentation area is specified 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). As the upper left vertical position (left_top_pos_y) and the lower right vertical position (right_down_pos_y), percentages of the height of the entire display area are described. The LCT includes a descriptor area (descriptor ()).

(MPU presentation area specification descriptor data structure)
Next, the data structure of the MPU presentation area designation descriptor (MPU_Presentation_Region_Descriptor ()) will be described. FIG. 8 is a diagram illustrating an example of the MPU presentation area designation descriptor. The MPU presentation 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 the layout number (layout_number) included in this descriptor, the layout specified by the area number (region_number), and the display elements (video data, character data) arranged in the presentation area. An MPU sequence number is described. Therefore, the presentation area for each display element is specified by this descriptor. In addition, as described above, the layout number (layout_number), for example, specifies whether it is a default presentation area or an effective presentation area.

(Presentation area setting example)
Next, an example of setting a presentation area by LCT will be described. FIG. 9 is a diagram illustrating an example of setting the presentation area. FIG. 9A shows a setting example of one default layout in which the main device is set as an output device. 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”, respectively. In addition, the presentation 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_pos). “0”, “100”, and “100” are designated. The above designation indicates that the entire display area of the main device is one presentation area in the default layout.

  FIG. 9B shows a setting example of one effective layout in which the main device is set as an output device. 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 “3”, respectively. The three presentation areas are identified by area numbers (region_number) “0”, “1”, and “2”, respectively. The presentation 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_pos_y) “20_20”, ”,“ 100 ”, and“ 100 ”. The presentation area corresponding to the area 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), and a lower right vertical position (right_pos_y) “0” ”,“ 20 ”, and“ 100 ”. The presentation area corresponding to the area 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), and a lower right vertical position (right_pos_y) “0_20”. ”,“ 100 ”, and“ 20 ”. The presentation areas related to the area numbers (region_number) “0”, “1”, and “2” correspond to the presentation areas of the video V01, the character T01, and the character T02 illustrated in FIG.

(Setting example of MPU presentation area specification descriptor)
FIG. 10 is a diagram illustrating a setting example of the MPU presentation area designation descriptor. FIG. 10A shows a setting example corresponding to the default layout shown 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 specified as the MPU sequence number (mpu_sequence_number). Therefore, as the presentation area of the video V01, presentation areas having a layout number (layout_number) and an area number (region_number) of “0” and “0”, respectively, are specified in the LCT. That is, the presentation area of the video V01 is the entire display area of the main device.

  FIG. 10B shows a setting example corresponding to the effective layout shown 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” is the MPU sequence number related to the character T01 for the set of “1” and “1”, “1”, The MPU sequence number related to the character T02 is designated for the set “2”. Accordingly, as the presentation area of the video V01, presentation areas having a layout number (layout_number) and an area number (region_number) of “1” and “0”, respectively, are specified in the LCT. As the presentation area of the character T01, presentation areas having a layout number (layout_number) and an area number (region_number) of “1” and “1”, respectively, are specified in the LCT. As the presentation area of the character T02, presentation areas having a layout number (layout_number) and an area number (region_number) of “1” and “2”, respectively, are specified in the LCT. Note that the symbols “V01”, “T01”, and “T02” described in the column of the MPU sequence number (mpu_sequence_number) in FIG. 10 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 illustrating a configuration of the receiving device 31 according to the present embodiment. The receiving device 31 includes a receiving unit 311 (tuner), a decoding unit 312, a separation unit 313, an audio decoding unit 314, a reproduction unit 316, a video decoding unit 317, a display synthesis unit 318, a display unit 319, a storage unit 322, and an operation input unit. 323 and a control unit 331.

The receiving unit 311 receives the broadcast wave transmitted from the transmission device 11 via the broadcast transmission path 12 by an antenna (not shown). 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, 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 multiplexed data input from the decoding unit 312 into program data, character data, and configuration information. The separation unit 313 outputs the character data and 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 317.

The audio decoding unit 314 decodes the audio data input from the separation unit 313 by a decoding method corresponding to the encoding method (for example, MPEG-4 audio) used for encoding, and generates original audio data. . The decoded audio data is data indicating the audio level at each time. The audio decoding unit 314 outputs the decoded audio data to the reproduction unit 316.
The playback unit 316 plays back the voice indicated by the voice data input from the voice decoding unit 314. The playback unit 316 includes, for example, a speaker.

  The video decoding unit 317 decodes the video data input from the separation unit 313 using the decoding method corresponding to the encoding method (for example, HEVC) used for encoding, and the original video data Is generated. The decoded video data is data indicating signal values forming a video (frame image) at each time. The video decoding unit 317 outputs the decoded video data to the display synthesis unit 318.

The display composition unit 318 receives video data from the video decoding unit 317, and receives character information and presentation area information from the control unit 331. The display synthesis unit 318 synthesizes the video for display (display video) by arranging the video indicated by the video data and the characters indicated by the character information in the presentation area specified by the presentation area information. The display composition unit 318 outputs to the display unit 319 display image data representing characters and characters arranged in a display image indicating the synthesized display image.
Note that image data indicating various images (for example, notification images (described later), setting menu screens, etc.) may be input to the display composition unit 318 from the control unit 331. In that case, the display composition unit 318 further superimposes the image indicated by the input image data on the display video.
The display unit 319 displays a display video based on the display video data input from the display synthesis unit 318. The display unit 319 includes a display, for example, a liquid crystal display, an organic EL (Electroluminescence) display, and the like. The display unit 319 displays a presentation element (video, text) designated in the presentation area designated by the presentation area information.

The storage unit 322 stores various data. For example, character area setting data (described later), notification image data (described later), and the like are stored in the storage unit 322 in advance. The storage unit 322 includes a storage medium, for example, an HDD (Hard-disk Drive), a flash memory, a ROM (Read-only Memory), a RAM (Random Access Memory), or a combination thereof.
The operation input unit 323 acquires an operation signal generated by receiving an operation input by the user, and outputs the acquired operation signal to the control unit 331. The operation signal includes, for example, a signal indicating ON / OFF of a power supply, a signal indicating a broadcast wave channel, and a signal designating the size of a presentation element (character, video). The operation input unit 323 is, for example, an operation button, an input interface that receives an operation signal from a remote operation device (remote control), or the like.

  The control unit 331 controls various operations of the receiving device 31. For example, the control unit 331 acquires character data and configuration information from the separation unit 313. The control unit 331 extracts character information included in the character data and arrangement information indicating each presentation area of the video indicated by the video data from the acquired configuration information. When valid arrangement information is acquired, the control unit 331 reads notification image data (character region setting guidance) indicating that the presentation region is variable according to the operation from the storage unit 322, and reads the read notification image data. The data is output to the display composition unit 318. An example of the notification image data will be described later. The control unit 331 changes the character presentation area based on the operation signal input from the operation input unit 323. The control unit 331 outputs the character information and the presentation area information indicating the presentation area for each display element (video, character) to the display synthesis unit 318.

(Configuration of control unit)
Next, the configuration of the control unit 331 of the receiving device 31 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 character data acquisition unit 332, a setting information detection unit 333, an arrangement information acquisition unit 334, a notification unit 335, a display control unit 336, and a channel selection unit 337.

  The character data acquisition unit 332 detects the character data input from the separation unit 313. Specifically, the character data acquisition unit 332 detects the MPT from the configuration information input from the separation unit 313, and outputs a stream in which stpp indicating timed text is described in the detected asset type (asset_type) of the MPT. Identify. The character data acquisition unit 332 reads the MH-data encoding scheme descriptor (MH-Data_Component_Descriptor ()) from the asset descriptor area (asset_descriptors_byte) of the identified stream.

  The character data acquisition unit 332 reads the encoding method (for example, in digital broadcasting) indicated by the code described in the data encoding method identification (data_component_id) of the read MH-data encoding method descriptor (MH-Data_Component_Descriptor ()). Specify the subtitle encoding method. The character data acquisition unit 332 reads a subtitle identification tag (subtitle_tag) and a start MPU sequence number (start_sequen_sequence_sequ_sub_sequence) from the additional identification information (additional_data_component_info) of the MH-data encoding scheme descriptor (MH-Data_Component_Descriptor ()).

  The character data acquisition unit 332 inputs an MPU whose sequence number is the start MPU sequence number (start_mpu_sequence_number) or later among the MPUs including the read caption identification tag (subtitle_tag). Then, the character data acquisition unit 332 identifies the MFU in which the code “0000” is described in the data type (data_type) for each of the input MPUs. The character data acquisition unit 332 reads character data described by the TTML description method from the data byte (data_byte) of each identified MFU. The character data acquisition unit 332 outputs the read character data to the setting information detection unit 333.

  The setting information detection unit 333 detects setting information described in a region surrounded by a predetermined character string (start tag, end tag) from the character data input from the character data acquisition unit 332, and the predetermined character The character information to be applied for each setting information is specified based on the arrangement of the columns. The setting information detection unit 333 outputs the detected setting information and the specified character information to the display control unit 336.

  The arrangement information acquisition unit 334 extracts LCT (arrangement information) from the configuration information input from the separation unit 313. The arrangement information acquisition unit 334 analyzes the extracted LCT and specifies a presentation area for each display element (character, video). Specifically, the arrangement information acquisition unit 334 uses the upper left horizontal position (left_top_pos_x), upper left horizontal position as a presentation 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 334 specifies, for example, the display 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 334 detects the MPU presentation 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 334 stores the MPU of the MPU that stores data (character data, video data) indicating display elements for each set of layout number (layout_number) and region number (region_number) from the detected MPU presentation region designation descriptor. A sequence number (mpu_sequence_number) is specified. The arrangement information acquisition unit 334 outputs the presentation area information indicating the presentation area for each display element specified by the combination of the layout number (layout_number) and the area number (region_number) to the notification unit 335 and the display control unit 336. The presentation 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 notification unit 335 specifies presentation attribute information for each presentation area based on the presentation area information input from the arrangement information acquisition unit 334. The notification unit 335 determines whether or not presentation attribute information indicating that it is valid for at least one presentation area is included. Thereby, it is determined whether or not the acquired LCT is valid. When it is determined that the LCT is valid, the notification image data is read from the storage unit 322 and the read notification image data is output to the display synthesis unit 318. LCT “valid” means that the display element (video, character) to be displayed is instructed to be immediately displayed in the presentation area designated by the LCT. Therefore, when it is determined that the LCT is valid, a notification image (guidance image) is displayed on the display unit 319, so that the viewer is immediately notified that the display region of the character presentation region can be changed by an operation. .

  The trigger for displaying the notification image on the display unit 319 is mainly in the following case. (1) When a viewer is watching a broadcast program on the same channel and an LCT including an effective presentation area is received. (2) When the viewer changes to a channel that receives an LCT including an effective presentation area. (3) When an LCT including an effective presentation area is received immediately after the operation of the receiving device 31 is started. Note that the notification unit 335 may delete the notification image when no operation signal is input for a predetermined period (for example, 30 seconds) after the display of the notification image is started. When the notification image is not displayed on the display unit 319, the notification unit 335 receives a predetermined operation signal (for example, an operation signal generated by pressing a notification image display button) from the operation input unit 323. May be displayed on the display portion 319.

  The display control unit 336 operates the operation input from the operation input unit 323 with the presentation region information indicating the display region for each display element input from the arrangement information acquisition unit 334 and the setting information input from the setting information detection unit 333. Update based on signal. Here, in the display control unit 336, the operation input unit 323 reads the setting information corresponding to the character region size specified by the operation signal and the magnification of the presentation region from the character region setting data stored in the storage unit 322. The display control unit 336 updates the input setting information to the setting information obtained by reading the character information specified by the operation signal. The display control unit 336 multiplies the read area by the presentation area indicated by the input presentation area information with respect to the display element specified by the operation signal, and updates the presentation area obtained by the multiplication.

  Note that the display control unit 336 displays the specified display elements so that the display areas do not overlap among the display elements in the entire display area of the display unit 319 and the display area of all the display elements does not exceed the entire display area. The size of the presentation area other than is updated. For example, when the display area of the designated display element is enlarged, the display control unit 336 reduces the presentation area of the non-designated display element, and when the display area of the designated display element is reduced, Enlarge the presentation area of undesignated display elements. When the presentation area other than the designated display element is a character presentation area, the display control unit 336 sets the font size designated by the setting information related to the character information to the font corresponding to the update of the presentation area. Update the setting information to indicate the size. That is, the setting information indicating the larger or smaller font size is changed according to the enlargement or reduction of the presentation area.

  The display control unit 336 outputs the presentation area information indicating the updated presentation area for each display element and the character information corresponding to the updated setting information to the display synthesis unit 318. Based on the output setting information, the display composition unit 318 indicates a font size when the character to be set is arranged in the presentation area indicated by the presentation area information. Note that the display control unit 336 outputs the input presentation region information and setting information to the display composition unit 318 when the presentation region information and the setting information are not updated.

  The channel selection unit 337 selects a channel for receiving a broadcast wave based on the operation signal input from the operation input unit 323. The channel selection unit 337 outputs a channel selection signal indicating the selected channel to the reception unit 311.

(Example of display image)
Next, an example of a display image displayed on the display unit 319 will be described. FIG. 13 is a diagram illustrating an example of a display image. In the example shown in FIG. 13, the entire display area is divided into three presentation areas. The three presentation areas are presentation areas designated by area numbers (region_number) “0”, “1”, and “2” shown in FIG. 9B, and are assigned to the characters T01, T02, and the video V01, respectively. Yes. A notification image G01 is superimposed on the lower right of the display area. By displaying the notification image G01, the viewer can notice that the presentation area where the characters are displayed is variable by the operation.

(Notification image)
FIG. 14 is a diagram illustrating an example of a notification image (notification image G01). The notification image includes the title “character area setting” and four character area size options “reduction”, “standard”, “enlargement 1”, and “enlargement 2”. “Reduce” indicates a character area size smaller than the size of the character presentation area specified by the LCT. “Standard” indicates the size of the character area specified by the LCT. “Enlarged 1” indicates a character area size larger than the character area size designated by the LCT. “Enlarged 2” indicates a larger character area size than “Enlarged 1”. When the notification image G01 is displayed, a character area size corresponding to one of the options can be selected by a user operation. The black circle immediately before “Standard” is a symbol indicating the selected character area size. The display control unit 336 cyclically changes the option every time an operation signal is input, and the display target character is displayed in the presentation area designated by the character area size selected by the change.

(Character area setting data)
Next, an example of character area setting data will be described. FIG. 15 is a diagram illustrating an example of character area setting data. Each column is associated with a font size and a character area ratio for each character area size. The character area size is a character area size selected by displaying the notification image. The item of font size in each line is the font size (unit: point) of the character specified by the setting information. The ratio of the character area in the bottom line of the font is a magnification of the presentation area with reference to the presentation area of the character designated by LCT. For example, when the character area size “small” is selected by the operation signal, a presentation area 70% of the presentation area specified by the LCT is allocated to the character, and the font size indicated by the setting information is large. In the case of, the character is displayed with a size of 12 points.

(Example of changing the presentation area)
Next, an example of changing the presentation area will be described. FIG. 16 is a diagram illustrating another example of the display image. FIG. 16A shows a display example when “Large” is selected as the character area size when the display image shown in FIG. 14 is displayed. In the example shown in FIG. 16A, the horizontal width of the region number “1” to which the character T01 is assigned and the vertical height of the region number “2” to which the character T02 is assigned are respectively LCT. 120% of the character area specified by. Note that if the character T01 and its presentation area are enlarged at a simply specified ratio, the character T01 cannot be accommodated in one line, so that the width of the presentation area is further expanded so that the character T01 fits in two columns. In this manner, the display control unit 336 may further enlarge the presentation area when the characters do not fit in the presentation area enlarged at the designated ratio by enlargement, or the presentation area enlarged at the designated ratio. The size of the character may be adjusted so that it fits in the box.
FIG. 16B is a display example when “small” is selected as the character area size when the display image shown in FIG. 14 is displayed. In the example shown in FIG. 16B, the horizontal width of the region number “1” to which the character T01 is assigned and the vertical height of the region number “2” to which the character T02 is assigned are respectively LCT. 70% of the character area specified by.

(Reception processing)
Next, the reception process according to the present embodiment will be described. FIG. 17 is a flowchart showing a reception process according to this embodiment.
(Step S101) The separation unit 313 (FIG. 11) extracts program data and character data from the multiplexed signal transmitted by broadcast waves, and acquires video data from the program data. The character data acquisition unit 332 acquires character data from the separation unit 313. Thereafter, the process proceeds to step S102.
(Step S102) The separation unit 313 extracts configuration information from the multiplexed signal transmitted by the broadcast wave. The arrangement information acquisition unit 334 extracts (acquires) LCT (arrangement information) from the configuration information. Thereafter, the process proceeds to step S103.

(Step S103) The notification unit 335 determines whether or not the LCT is valid based on the layout number included in the LCT (location information). If it is determined that it is valid (YES in step S103), the process proceeds to step S104. If it is determined that it is not included (NO in step S103), the process proceeds to step S108.
(Step S104) The display control unit 336 causes the display unit 319 to display display elements (characters, videos) in the presentation area specified by the LCT (placement information) determined to be valid. Thereafter, the process proceeds to step S105.
(Step S105) The notification unit 335 causes the display unit 319 to display a notification image (character setting area guidance) via the display composition unit 318. Thereafter, the process proceeds to step S106.

(Step S106) The display control unit 336 proceeds to step S107 when an operation signal designating a character area size is input (YES in step S106), and proceeds to step S107 when not input (NO in step S106). The processing shown in FIG.
(Step S107) The display control unit 336 changes the character presentation area to a presentation area according to the designated character area size, and sets the video presentation area so that the display area of each display area is contained in the entire screen area. change. The display control unit 336 causes the display unit 319 to display each display element (character, video) in the changed presentation area. Then, the process shown in FIG. 17 is complete | finished.
(Step S108) The display control unit 336 causes the display unit 319 to display display elements (characters, videos) in the presentation area specified by the default LCT (placement information). Then, the process shown in FIG. 17 is complete | finished.

(Modification)
Next, a modification of this embodiment will be described. In general, the size of the display area of the display unit 319 varies depending on the model. When a character is displayed in the presentation area specified by the LCT or the font size specified by the setting information, the larger the display area, the larger the character is displayed, and the smaller the display area, the smaller the character is displayed.
Therefore, the notification unit 335 outputs notification image data to the display composition unit 318 when the character size indicated by the setting information input from the setting information detection unit 333 is outside the range of the predetermined character size. May be. Out of the predetermined character size range is, for example, one or both of the case where the font size indicated by the setting information is smaller than the predetermined font size. Thereby, when the character size is outside the range of the predetermined size, the viewer can be made aware that the character region can be set.

  In addition, the display control unit 336 is specified by the device information input from the display unit 319 with the reference value d of the size of the display area set in advance in the font size and presentation area indicated by the updated setting information. You may multiply by ratio d / d 'with respect to the magnitude | size d' of a display area, respectively. By using the font size and presentation area obtained by multiplication, the size of the character area according to the size of the display unit 319 can be made substantially constant.

  The storage unit 322 stores a plurality of sets of character area setting data in advance. Each set is associated with a classification of the size of the display area of the display unit 319. In the character area setting data of each set, a smaller font size and a smaller character area ratio are set as the display area is larger. The display control unit 336 may select a set of character area setting data to be used from a plurality of sets based on device information input from the display unit 319 at the start of operation or when connected to the display unit 319. . Also with this configuration, the change in the size of the character area due to the size of the display unit 319 can be reduced. For example, as shown in FIG. 18, when the size of the display area of the display unit 319 is larger than the reference value, the size of the displayed character is the case where the size of the display area of the display unit 319 is the reference value. Is equivalent to

  Note that there are cases where the character presentation area changed by the character area size specified by the operation signal exceeds the entire display area of the display unit 319. In this case, for example, the display control unit 336 may determine the presenting area within the entire display area, or may display the entire character presenting area by a scroll operation. In that case, the display control unit 336 outputs scroll bar data representing the scroll bar read from the storage unit 322 to the display synthesis unit 318 and causes the display unit 319 to display the scroll bar. In addition, the display control unit 336 specifies an output region to be output based on the operation signal generated by the scroll operation in the presentation region, and outputs an output region signal indicating the specified output region to the display composition unit 318. The display synthesis unit 318 extracts a portion of the output area specified by the output region signal from the generated display video, and outputs display video data indicating the extracted display video to the display unit 319.

As described above, the receiving device 31 according to the present embodiment includes the receiving unit 311 that receives received data by broadcast waves, the display element including characters from the received data, and the arrangement information indicating the display area of the display element. An acquisition unit (a separation unit 313, a character data acquisition unit 332, and an arrangement information acquisition unit 334). In addition, when valid arrangement information is acquired, the reception device 31 notifies the notification unit 335 that the presentation area is variable according to the operation, and the presentation area indicating the presentation area of the display element. A display control unit 336 that changes according to the operation.
With this configuration, the display element is displayed in the presentation area indicated by the effective arrangement information, and the user is notified that it is variable according to the operation. Therefore, after respecting the display area of the display element set by the broadcaster or the like, the user can adjust the display area to a user's desired display area by an operation.

Further, the notification unit 335 causes the display unit 319 to display a notification that the presentation area is variable according to the operation when the size of the received character is outside the predetermined size range.
With this configuration, when the character size is out of the predetermined range, the user is prompted to perform an operation for changing the size of the presentation area to a desired size.

  In addition, the display control unit 336 decreases the ratio of the size of the character to the size of the display region of the display unit 319 as the display region of the display unit 319 that displays the display element including the character is larger. With this configuration, the difference in the size of the displayed character is alleviated rather than the difference in the size of the display area depending on the model of the display unit 319.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. About the same structure as embodiment mentioned above, the same code | symbol is attached | subjected and the description is used. The receiving device 31A according to the present embodiment receives broadcast waves of a plurality of channels at the same time, and the processing related to the display area of the received character data is different from that of the first embodiment. FIG. 19 is a block diagram showing the configuration of the receiving device 31A according to this embodiment. The reception device 31A includes a control unit 331A instead of the control unit 331 in the reception device 31 (FIG. 11). In addition, the receiving device 31A replaces the receiving unit 311, the decoding unit 312, the separation unit 313, the audio decoding unit 314, and the video decoding unit 317 for receiving broadcast waves of a plurality of channels of different broadcast transmission paths 12A and 12B, respectively. It has a configuration. As such a configuration, the reception device 31A includes reception units 311A and 311B, decoding units 312A and 312B, separation units 313A and 313B, audio decoding units 314A and 314B, and video decoding units 317A and 317B.

The receiving units 311A and 311B, decoding units 312A and 312B, separation units 313A and 313B, audio decoding units 314A and 314B, and video decoding units 317A and 317B are configured by the receiving unit 311, decoding unit 312, separation unit 313, and audio decoding unit, respectively. The configurations of the unit 314 and the video decoding unit 317 are the same. For example, the receiving units 311A and 311B each receive a broadcast wave of a channel designated by a channel selection signal input from the control unit 331A. Receiving sections 311A and 311B output the converted multiplexed data to decoding sections 312A and 312B, respectively.
As illustrated in FIG. 20, the control unit 331A includes a display control unit 336A instead of the display control unit 336 (FIG. 12) represented by the control unit 331 (FIG. 11). The character data acquisition unit 332, the setting information detection unit 333, the arrangement information acquisition unit 334, and the notification unit 335 perform the processing described with reference to FIG. 12 for each type of data from the separation units 313A and 313B for each channel. Run. The channel selection unit 337 can select a plurality of channels to be received according to the operation signal input from the operation input unit 323. The channel selection unit 337 outputs a channel selection signal indicating each of the selected channels to the reception units 311A and 311B.

  The display control unit 336A determines display areas (windows) W21A and W21B for each channel receiving a broadcast wave, as illustrated in the display image of FIG. The display control unit 336A displays each display element (characters T21A, T22A, video V21A, V21B) for each display area defined in each channel based on the LCT and MPU presentation area designation descriptor transmitted by the broadcast wave of the channel. Is identified by the same method as the display control unit 336 (FIG. 12). The display element assigned to the identified presentation area is specified by the MPU sequence number of the MPU storing the display element. Further, the notification unit 335 determines whether or not the LCT for each channel is valid, and displays the notification image G21 in the display area W21A for the channel for which the valid LCT is detected. The display control unit 336A updates the presentation area of each display element based on the character area size specified by the operation signal input from the operation input unit 323. In the example shown in FIG. 21B, the presentation areas of the characters T21A and T22A are enlarged as compared with the example shown in FIG. 21, and the presentation area of the video V21A is determined as the remaining area of the display area W21A of the channel. It is reduced more than the example shown in 21 (a). When a valid LCT is detected for any channel, as shown in FIG. 21C, the notification unit 335 displays notification images G21A and G21B in the display areas W21A and W21B of the respective channels. Let In the example shown in FIG. 21C, the display area W21B includes the presentation areas for the characters T21B and T22B.

  As shown in FIG. 21, the aspect ratio of the display areas W21A and W21B of each channel is constant between channels, and is constant regardless of the increase or decrease in the number of channels. Further, the sizes of the display areas W21A and W21B are equal between the channels. Therefore, an empty area to which no display area W21A or W21B of any channel is assigned is generated in the entire display area of the display unit 319. The height and width of the empty area are larger than the height and width of the display area of at least one channel.

  Therefore, as shown in FIG. 22A, the display control unit 336A newly sets the presentation areas for the characters T21A and T22A within the empty area in accordance with the operation signal input from the operation input unit 323 (FIG. 19). The display area is changed to the presentation area specified by the LCT in the set display area W21C. However, the display control unit 336A maintains the presentation areas of the videos V21A and V21B in the display areas W21A and W21B of the respective channels. Then, the display control unit 336A expands the presentation area of the video V21 over the entire display area W21A. The display control unit 336A may determine the size of the presentation area set in the display area W21C based on the operation signal, and the size of the presentation area different from the size specified by the LCT. In the example shown in FIG. 22B, the presentation areas of the characters T21A and T22A are enlarged as compared with the example shown in FIG.

  In the present embodiment, the display control unit 336A determines whether or not to change the character display area in addition to the character display area according to the operation signal to a display area (separate screen) different from the display area of the channel in the empty area. Is specified. As shown in FIG. 23, in the notification image G01 according to the present embodiment, a combination of a character area size and whether or not to specify another screen is shown as options. In the example shown in FIG. 23, four types of character area sizes of “small”, “standard”, “enlarged 1”, and “enlarged 2” are designated (separate screen) and undesignated in 8 ways. There are options. One of these options is selected by the operation signal input from the operation input unit 323, and the display control unit 336A displays the channel to be operated based on the selected character area size and the presence / absence of designation of another screen. Update the presentation area for each element.

  In the present embodiment, as shown in FIG. 24, a separate display area may be set for any of a plurality of channels. Here, the display control unit 336A (FIG. 20) sets the separate display area (for example, W21C) set for a certain channel to the original display area of the channel rather than the original display area of other channels (for example, W21B). It is set to a free area close to (for example, W21A). Therefore, display elements transmitted on the same channel are displayed close to each other.

  The display control unit 336A may cause the display unit 319 to display the characters indicated by the character data whose service type is caption broadcasting and the video indicated by the video data synchronized with the character data in a common manner. Here, the character data acquisition unit 332 detects the MPT from the configuration information input from the separation unit 313, and adds additional identification information (additional_data_component_info) of the MH-data encoding scheme descriptor (MH-Data_Component_Descriptor ()) from the detected MPT. The service type can be determined based on the caption type (type) described in (1). As illustrated in FIG. 24, the display control unit 336A may display, for example, a boundary line B21 that passes through the center of the entire screen area of the display unit 319 and extends in the vertical direction. The display areas W21A and W21C are separated from the display areas W21 and W21D by the boundary line B21. The display area W21C including the presentation area of the character T23A whose service type is determined to be caption broadcasting and the display area W21A including the presentation area of the video V21A synchronized with the character T23A are both arranged in the area on the left side of the boundary line B21. The By displaying the boundary line B21, the left area is clearly distinguished from the right area where the display areas W21B and W21D are displayed, so that the user can relate the character T23A and the video V21A related to the subtitle broadcast. Gender can be intuitively recognized. Note that the display control unit 336A has, as a common mode, the color, thickness, line type (solid line, broken line, one-point broken line, etc.) of the display area including the presentation area of each character and video or the display area, etc. May be shared.

As described above, in the receiving device 31A according to the present embodiment, the receiving units 311A and 311B each receive received data using a plurality of channels of broadcast waves. In addition, the display control unit 336A determines a display area of a plurality of channels, and displays a character display area acquired from at least one channel of received data from within the display area of the channel from outside the display area of the plurality of channels according to an operation. The display area of the video obtained from the received data of the channel is maintained in the display area of the channel.
With this configuration, the presentation area of the character instructed by the operation is arbitrarily changed in the empty area generated by the equal aspect ratio among the display areas of the plurality of channels, and the video in the same display area as the character is displayed. The presentation area can be expanded to the entire display area. Therefore, the user can easily view the characters by making the area separate from the video, and can easily view the video by enlarging the video.

In the present embodiment, when the character acquired from the reception data of at least one channel is a subtitle broadcast character synchronized with the video acquired from the reception data of the channel, the display control unit 336A displays the character and the character The video is displayed in a common manner.
With this configuration, the user can intuitively grasp the relevance between the character and the video, and can understand the broadcast contents of the video by the character more.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope indicated in the claims, and the technical configurations disclosed in different embodiments are appropriately combined. The obtained embodiment is also included in the technical scope of the present invention.
Each component of the present invention can be arbitrarily selected, and an invention having a selected configuration is also included in the present invention.

For example, in the reception device 31, the reproduction unit 316 and the display unit 319 may be configured separately from other configuration units. In the above description, the configuration in which the receiving device 31A can receive broadcast waves of two channels has been described as an example. However, the configuration is not limited thereto. The receiving device 31A may be capable of receiving broadcast waves of three or more channels.
In the above-described embodiment, the case where the media transport method according to MMT (MPEG Media Transport) defined by MPEG-H is used as a transmission method for transmitting various data is exemplified. For example, a method defined by MPEG-2 Systems may be used. In addition, a data format, an encryption method, and an encoding method related to transmission may be a format or a method defined by the transmission method.

  Further, a part of the transmission device 11 and a part of the reception device 31 in the above-described embodiment may be realized by 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 recognition data transmission apparatus, 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. 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.

In addition, this invention can be implemented also in the following aspect.
(1) A receiving unit that receives reception data by broadcast waves, a display element that includes characters from the received data, an acquisition unit that acquires arrangement information indicating a presentation area of the display element, and valid arrangement information are acquired. A notification unit that notifies that the presentation area is variable according to the operation, and a display control unit that changes the presentation area of the display element from the presentation area indicated by the arrangement information according to the operation. Receiver device.

(2) The receiving device according to (1), wherein the notification unit displays the notification on a display unit when a size of the character is outside a predetermined size range.

(3) The display control unit reduces the ratio of the character size to the display region size of the display unit as the display region of the display unit that displays the display element is larger (1) or (2 ) Receiver.

(4) The receiving unit receives each received data with a plurality of channels of broadcast waves,
The display control unit determines the display area of the plurality of channels, and moves the character display area acquired from the reception data of at least one channel from the display area of the channel to the outside of the display area of the plurality of channels according to an operation. The receiving device according to any one of (1) to (3), wherein the video presentation area obtained from the reception data of the at least one channel is changed and maintained in the display area of the channel.

(5) When the character acquired from the reception data of the at least one channel is synchronized with the video acquired from the reception data of the channel, the display control unit displays the character and the video in a common mode. (4) The receiving apparatus.

(6) A receiving method of the receiving apparatus, wherein the receiving unit obtains display elements including characters from the received data received by broadcast waves, an acquisition process of acquiring arrangement information indicating a display area of the display elements, and effective arrangement A notification process for notifying that the presentation area is variable according to an operation when information is acquired, and a display control process for changing the presentation area of the display element from the presentation area indicated by the arrangement information according to the operation And a receiving method.

(7) An acquisition procedure for acquiring display information including characters and arrangement information indicating a display area of the display element from the received data received by the receiver through broadcast waves, and effective arrangement information are acquired in the computer of the reception device. A notification procedure for notifying that the presentation area is variable according to an operation, and a display control procedure for changing the presentation area of the display element from the presentation area indicated by the arrangement information according to the operation. Program.

(8) A computer-readable storage medium storing the program of (7).

  DESCRIPTION OF SYMBOLS 1 ... Broadcasting system, 11 ... Transmission apparatus, 111 ... Program data acquisition part, 112 ... Character data acquisition part, 113 ... Configuration information acquisition part, 114 ... Multiplexing part, 115 ... Encryption part, 116 ... Transmission part, 12, 12A, 12B ... Broadcast transmission path, 13 ... Broadcast satellite, 31, 31A ... Receiver, 311, 311A, 311B ... Receiver, 312, 312A, 312B ... Decoder, 313, 313A, 313B ... Separator, 314, 314A 314B: Audio decoding unit, 316 ... Playback unit, 317, 317A, 317B ... Video decoding unit, 318 ... Display composition unit, 319 ... Display unit, 322 ... Storage unit, 323 ... Operation input unit, 331, 331A ... Control unit 332: Character data acquisition unit, 333 ... Setting information detection unit, 334 ... Arrangement information acquisition unit, 335 ... Notification unit, 336, 336A ... Display control unit, 337 ... Part

Claims (8)

A receiving unit for receiving received data by broadcast waves;
A display element including characters from the received data, and an acquisition unit that acquires arrangement information indicating a display area of the display element;
A notification unit for notifying that the presentation area is variable in response to an operation when valid arrangement information is acquired;
A display control unit that changes a presentation area of the display element from a presentation area indicated by the arrangement information according to an operation;
A receiving device.   The receiving device according to claim 1, wherein the notification unit displays the notification on a display unit when a size of the character is outside a predetermined size range.   3. The display control unit according to claim 1, wherein the display control unit reduces the ratio of the character size to the display region size of the display unit as a display region of the display unit that displays the display element is larger. Receiver. The receiving unit receives each received data with a broadcast wave of a plurality of channels,
The display control unit determines the display area of the plurality of channels, and moves the character display area acquired from the reception data of at least one channel from the display area of the channel to the outside of the display area of the plurality of channels according to an operation. The receiving apparatus according to any one of claims 1 to 3, wherein the receiving apparatus changes and maintains the display area of the video acquired from the reception data of the at least one channel in the display area of the channel.   5. The display control unit displays the character and the video in a common manner when the character acquired from the reception data of the at least one channel is synchronized with the video acquired from the reception data of the channel. The receiving device described in 1. A receiving method of a receiving device,
An acquisition process for acquiring display information including characters from received data received by the broadcast wave by the receiving unit, and arrangement information indicating a presentation area of the display element,
A notification process for notifying that the presentation area is variable according to an operation when valid arrangement information is acquired;
A display control process for changing the display area of the display element from the presentation area indicated by the arrangement information according to an operation;
Receiving method. In the computer of the receiving device,
An acquisition procedure for acquiring display elements including characters from received data received by broadcast waves by a receiving unit, and arrangement information indicating a display area of the display elements,
A notification procedure for notifying that the presentation area is variable according to an operation when valid arrangement information is acquired;
A display control procedure for changing the display area of the display element from the presentation area indicated by the arrangement information according to an operation;
A program for running   A computer-readable storage medium storing the program according to claim 7.

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