JP2016082541A - Receiver and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receiver capable of appropriately displaying, non-displaying and controlling an information presentation in an L shape or the like in accordance with a viewing situation of a user.SOLUTION: In the receiver, a mode identification part identifies whether a content signal is being received or being reproduced by a recording device in which the content signal is recorded beforehand. If the content signal is being received, a mode identification signal representing a reception time is outputted and if the content signal is being reproduced, a mode identification signal representing a recording reproduction time is outputted. A layout control part receives layout control information for controlling the layout of a video image, receives the mode identification signal from the mode identification part and controls whether to display a specific asset when combining video images in a video combination part in accordance with an instruction of a display mode in a layout setting table included in the layout control information and on the basis of whether the mode identification signal indicates the reception time or the recording reproduction time.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a receiver. In particular, the present invention relates to a receiver that receives video content such as television broadcasting.

When transmitting emergency breaking information in TV broadcasting, or when transmitting information other than the originally scheduled program, information such as text on the outside of the video screen by reducing the video screen for a predetermined time There is a method for displaying. The screen display by this method is referred to as “L-shaped”, “inverted L-shaped”, “U-shaped” or the like according to the shape. In other words, in a rectangular television image, for example, information such as characters is displayed in a predetermined width area inside two or three adjacent sides, and video content that is the original program is displayed in a reduced image area. It is a technique to do. As a specific example, information about the results of public office elections, information about natural disasters (typhoons, earthquakes, floods, etc.), traffic information, etc. are displayed using this method.
It is also conceivable to display subtitles related to the program contents on the screen by a similar method.

  The reason why these methods are used is to ensure that necessary information is delivered to the viewer so that information such as characters and the video of the broadcast program do not interfere with each other.

  For example, Table 7-12 (p. 50) of Non-Patent Document 1 describes the configuration of a layout setting table that stores information for controlling the screen layout in the MMT transmission method. Also, p. 52 shows an example of layout allocation in which the entire screen is divided into three areas as “(2) three non-overlapping three areas”.

“ARIB STD-B60 Version 1.0 Standard, Media Transport System by MMT in Digital Broadcasting”, The Japan Radio Industry Association, formulated July 31, 2014, p. 49-54, “7.3.3.3 Layout Setting Table (LCT)”

  However, there are cases where the viewer replays and views the broadcast program recorded and recorded by the recording device later. In the conventional technique, even when the recorded and recorded content is reproduced, it is displayed on a screen using an L-shaped method. For this reason, the program originally recorded by the viewer is reduced and displayed. In addition, information such as natural disasters that have already become past may be displayed and feel disturbed.

  Information related to disasters is important, and it is required to ensure that necessary information reaches viewers. On the other hand, for example, in recording and playback or in areas where the relationship with disasters is relatively weak, It is desirable to suppress the display of the character shape or the like and to enable the viewer to select whether or not to display the character shape.

  The present invention has been made in consideration of the above-described circumstances, and appropriately controls display or non-display of information presentation in an L-shape or the like according to the viewing situation of the user. A receiver and a program that can be used.

  [1] In order to solve the above problems, a receiver according to an aspect of the present invention receives a content signal in which a plurality of assets corresponding to media and control information are multiplexed, and separates the content signal for each asset. And a multimedia decoder unit for extracting control information, and a video based on a video asset among the assets separated by the multimedia decoder unit, and a video based on at least one of a caption asset and a character super asset A video synthesizing unit to synthesize, and whether the content signal is being received or whether the content signal is being played back by a recording apparatus that has recorded the content signal in advance; A mode identification signal indicating that recording / reproduction is being performed if the mode identification signal represents And a layout control information for controlling a video layout included in the control information from the multimedia decoder unit and a mode identification signal from the mode identification unit. The video synthesizing unit synthesizes the video according to the display mode instruction in the layout setting table included in the layout control information and based on whether the mode identification signal indicates reception or recording / reproduction. A layout control unit for controlling whether or not to display the specific asset when performing the operation, and a video output unit for outputting the video obtained as a result of the synthesis by the video synthesis unit according to the control by the layout control unit, It is characterized by comprising.

  [2] Further, according to an aspect of the present invention, in the above receiver, the display mode in the layout setting table may be set at the time of reception and at the time of recording / reproduction for each layout defined in the layout setting table. For each of these, an instruction is given to either automatic display, automatic non-display or selection display, and the selection display determines whether or not to display the layout based on the input selection instruction. It represents that it should be.

  [3] Further, according to one aspect of the present invention, in the receiver, the layout control unit displays a video based on the subtitle asset and the character super asset as a result of the instruction in the display mode in the layout setting table. When not displaying, it controls to make the area | region which displays the image | video based on the said video asset into the whole screen.

  [4] One aspect of the present invention is the receiver, wherein the display mode is provided in a loop for each combination of a layout number and a device ID in the layout setting table. To do.

  [5] In addition, according to an aspect of the present invention, in the receiver described above, the display mode is provided in a display mode descriptor included in a descriptor area in the loop.

  [6] One embodiment of the present invention is a program for causing a computer to function as any of the receivers described above.

  According to the present invention, it is possible to perform control such as displaying a specific layout automatically, disabling automatically, or displaying a specific layout in accordance with each situation during reception or recording / reproduction.

  As an example, the effect is not limited to this example, but the subtitles and superimpose to be displayed at the time of reception can be hidden during recording and reproduction.

It is a block diagram which shows schematic function structure of the receiver by 1st Embodiment of this invention. It is the schematic which shows the data structure of the layout setting table which the receiver by the same embodiment receives as a part of video content control signal. It is the schematic which shows the data structure of the display mode descriptor in the layout setting table by the embodiment. FIG. 6 is a correspondence diagram showing correspondence between display mode (DMF) values and meanings in a layout setting table according to the embodiment. 4 is a schematic diagram illustrating a specific example of screen presentation performed on the receiver side based on information for controlling layout in the embodiment. FIG. It is the schematic which shows the structure of the plane for implement | achieving the said screen presentation by the same embodiment. It is the schematic which shows the specific example (The example of a specific value is included) of the layout setting table by the embodiment. It is the schematic which shows the example of the MPU presentation area | region designation | designated descriptor in the asset loop of the MP table transmitted in the same embodiment. It is the schematic which shows the structure and arrangement | positioning of the screen controlled by the layout control part by the embodiment. It is the schematic which shows the data structure of the layout setting table which the receiver by 2nd Embodiment receives. The difference from the first embodiment is that data indicating the display mode is provided at a position other than the descriptor area.

[First Embodiment]
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a schematic functional configuration of a receiver according to the embodiment. As shown in the figure, the receiver 1 includes a tuner unit 11, an IP communication unit 12, a recording / playback unit 14, an MMT decoder unit 15 (multimedia decoder unit), an audio decoder unit 21, and a video decoder unit. 22, subtitle acquisition unit 23, character super acquisition unit 24, video synthesis unit 25, audio output unit 26, video output unit 27, mode identification unit 30, and layout control unit 31. Is done. One form of the receiver 1 is a television receiver. The receiver 1 may include a display device using liquid crystal or electroluminescence, or may output a video signal to an external display device. The receiver 1 may include a speaker for outputting sound, or may output a sound signal to an external speaker or the like. The receiver 1 may have a recording function for recording and playing back video content such as a received TV program, or recording from an external recording device (hard disk recorder, DVD recorder, Blu-ray disc recorder, etc.). A signal of the reproduced video content may be input.
A so-called television broadcast is transmitted using broadcast waves (radio waves) or cable television signals, but transmission by MMT (MPEG media transport) does not depend on a physical transmission medium. Video content similar to that of television broadcasting can also be received via communication such as the Internet. Further, the television broadcast itself may be distributed via the Internet.

  The tuner unit 11 receives a broadcast signal from the outside, and selects and acquires a signal having a desired frequency (channel). The broadcast signal is, for example, transmitted as a radio wave or transmitted through a cable for cable television, and is received by the receiver 1.

  The IP communication unit 12 communicates with an external device or the like using an Internet protocol (IP). This communication is performed using means of a wired signal (such as an optical cable or a metal cable) or a wireless signal (such as a communication service provided by a communication carrier or a wireless LAN). This communication is performed, for example, via the Internet. The IP communication unit 12 receives, for example, a video content signal or the like from a server device of a video content distribution company using the IP protocol.

  The recording / playback unit 14 has a function of playing back recorded video content and supplying the signal to the MMT decoder unit 15. The recording / playback unit 14 has a function of a recording / playback device such as a so-called hard disk recorder, DVD recorder, or Blu-ray recorder. In the illustrated example, the recording / reproducing unit 14 is shown in the receiver 1. Note that the recording / reproducing unit 14 itself may exist outside the receiver 1, and in this case, the reproduced content signal is supplied from the outside to the MMT decoder unit 15 via a cable terminal or the like. .

The MMT decoder unit 15 receives and decodes the video content signal received by the tuner unit 11, the video content signal received by the IP communication unit 12, and the video content signal supplied from the recording / playback unit 14. The signal received by the MMT decoder unit 15 is multiplexed by the MMT method, and includes video assets, audio assets, data assets, subtitle assets, character super assets, and the like. Further, the signal received by the MMT decoder unit 15 includes control information. This control information includes a layout setting table, an MP table, and other tables. Then, the MMT decoder unit 15 supplies the extracted audio asset data to the audio decoder unit 21, supplies the video asset data to the video decoder unit 22, and supplies subtitle asset data to the subtitle acquisition unit 23. The character super asset data is supplied to the character super acquisition unit 24. The MMT decoder unit 15 supplies the layout control unit 31 with information related to layout control among the control information extracted from the supplied signal.
That is, the MMT decoder unit 15 receives a content signal in which a plurality of assets corresponding to media and control information are multiplexed, separates the received content signal for each asset, and extracts control information.

The audio decoder unit 21 decodes the audio data supplied from the MMT decoder unit 15 and supplies the decoded data to the audio output unit 26.
The video decoder unit 22 decodes the video data supplied from the MMT decoder unit 15 and supplies the video data to the video synthesis unit 25 as a video having a predetermined number of pixels and a predetermined frame rate.

The caption acquisition unit 23 acquires the caption data supplied from the MMT decoder unit 15 and provides it to the video composition unit 25. Note that the caption data is described in TTML (Timed Text Markup Language). In addition to the text itself to be displayed as captions, the presentation time information and display attributes (character size, Information on the display color of characters).
The character super acquisition unit 24 acquires the character super data supplied from the MMT decoder unit 15 and provides it to the video composition unit 25. The character super data is also described in TTML, and includes presentation time information and display attribute information in addition to the text itself to be displayed as the character super.

The video composition unit 25 synthesizes the video based on the data supplied from the video decoder unit 22, the caption acquisition unit 23, and the character super acquisition unit 24 and according to the control information regarding the layout from the layout control unit 31. The video synthesis unit 25 supplies the video obtained by synthesis to the video output unit 27. At this time, the video composition unit 25 defines the presentation timing of the video supplied from the video decoder unit 22, the subtitle supplied from the subtitle acquisition unit 23, and the character super supplied from the character super acquisition unit 24. Adjust according to the presentation time.
That is, the video composition unit 25 synthesizes the video based on the video asset among the assets separated by the MMT decoder unit 15 with the video based on at least one of the caption asset and the character super asset.
Details of layout control when the video composition unit 25 synthesizes the video, the caption, and the character superimpose will be described later.

  The audio output unit 26 outputs the audio supplied from the audio decoder unit 21. A speaker for outputting sound may be provided inside the receiver 1 or may exist outside the receiver 1.

The video output unit 27 receives the video signal synthesized by the video synthesis unit 25 and outputs the video. A display device for outputting video may be provided inside the receiver 1 or may exist outside the receiver 1.
That is, the video output unit 27 outputs the video obtained as a result of the synthesis by the video synthesis unit 25 according to the control by the layout control unit 31.

The mode identification unit 30 reads the content signal decoded by the MMT decoder unit 15 from the outside or reads it from a once recorded medium and reproduces it (hereinafter “recording”). It may be referred to as “replay”.) The mode identifying unit 30 determines whether it is receiving or recording / reproducing based on a control signal from each unit in the receiver 1 or a signal input from the outside. As an example, the mode identification unit 30 performs the above determination based on whether either the tuner unit 11 or the IP communication unit 12 receives a video content signal (such as a television broadcast) from the outside. The mode identification unit 30 supplies a mode identification signal representing either “when receiving” or “when recording / reproducing” to the layout control unit 31 according to the determination result.
That is, the mode identifying unit 30 identifies whether the content signal to be decoded and presented by the receiver 1 is being received or is being played back by a prerecorded recording device. In some cases, a mode identification signal indicating “during reception” is output, and in the case of reproduction, a mode identification signal indicating “recording / reproduction” is output.
Here, “being received” means that the tuner unit 11 receives a broadcast signal, or the IP communication unit 12 is remote (via at least a user's home or the receiver 1 via a WAN (wide area network)). Or from outside the building where it is installed.

The layout control unit 31 controls the layout of the video synthesized in the video synthesis unit 25 based on the layout control information supplied from the MMT decoder unit 15. Note that the layout control unit 31 uses information indicating “at the time of reception” or “at the time of recording / playback” supplied from the mode identification unit 30 when controlling the layout of the synthesized video.
That is, the layout control unit 31 receives layout control information included in the control information from the MMT decoder unit 15 for controlling the video layout. Then, the layout control unit 31 receives a mode identification signal (indicating “when receiving” or “when recording / reproducing”) from the mode identifying unit 30 and instructs the display mode in the layout setting table included in the layout control information. Therefore, based on whether the mode identification signal indicates “at the time of reception” or “at the time of recording / playback”, the video composition unit 25 controls whether to display a specific asset when compositing the video. . In addition, when the video based on the caption asset and the character super asset is not displayed as a result of the instruction by the display mode in the layout setting table, the layout control unit 31 sets the entire screen to display the video based on the video asset. Control as follows.

  The receiver 1 may include an application execution environment for executing an application (application) and an application control function for controlling the execution of the application. Further, the receiver 1 may have a function of decoding the data broadcast asset included in the broadcast signal in the same manner as other assets and synthesizing it with the video. The receiver 1 may have a so-called recording function. This video recording function can record a received video content signal on a recording medium and reproduce it when necessary. Since the functions listed here are not directly related to the following description of the present embodiment, a detailed description thereof will be omitted.

Next, various information for controlling the video layout will be described.
FIG. 2 is a schematic diagram showing a data configuration of a layout configuration table (Layout Configuration Table, LCT) that the receiver 1 receives as part of a video content control signal. In the figure, the data structure is represented by a language having a block structure. The number of bits represents the data size of each item included in the data structure. The data notation represents the data type of each item. “Uimsbf” in data notation stands for “unsigned integer most significant bit first” (unsigned integer, most significant bit first).

A feature of the configuration of the layout setting table used in the present embodiment is that a descriptor area is provided for each layout and device combination in the layout loop. This layout setting table has a loop for a combination of a layout and a device as a first level, and a loop for a region as a second level. Each data item is described below.
(1) table_id (table ID) is information for identifying a table type.
(2) version is information indicating the version of the table.
(3) length is information indicating the size of the table. Expressed in binary.
(4) number_of_loop (number of layouts / devices) indicates the total number of combinations of layouts and devices set in this table.

The following data items (5) to (14) are repeated N times for each combination of layout and device. Here, N is an integer indicated by the number_of_loop described above.
(5) layout_number (layout number) indicates the number of each layout. The layout number “0” corresponds to the default layout setting. One layout can be composed of a plurality of devices.
(6) device_id (device ID) indicates the number of the client terminal. The device ID “0” corresponds to the main device.
(7) number_of_region (number of regions) indicates the number of regions in the device of the layout.

The following data items (8) to (13) are repeated M times for each area of the device in the layout. Here, M is an integer indicated by the number_of_region.
(8) region_number (region number) indicates the number of each region. The area number “0” is a default area number. Note that different area numbers are assigned to different devices of the same layout.
(9) left_top_pos_x (upper left horizontal position) indicates the upper left horizontal position of the area as a ratio (percentage) to the total number of pixels in the horizontal direction. The left side of the full screen display is 0, and the right side of the full screen display is 100.
(10) left_top_pos_y (upper left vertical position) indicates the upper left vertical position of the area as a ratio (percentage) to the total number of pixels in the vertical direction. The upper side of the full screen display is 0, and the lower side of the full screen display is 100.
(11) right_down_pos_x (lower right horizontal position) indicates the lower right horizontal position of the area as a percentage of the total number of pixels in the horizontal direction.
(12) right_down_pos_y (lower right vertical position) indicates the lower right vertical position of the area as a percentage of the total number of pixels in the vertical direction.
(13) layer_order (layer order) indicates the relative position in the depth direction of the area. The layer order “0” indicates an area to be presented in the last column, and the higher the layer order number, the more the presentation is in front.

(14) A descriptor (descriptor area) belonging to the first level loop is an area for a descriptor indicating more detailed information regarding the layout and the combination of the devices. As described above, the provision of this descriptive region is one of the features of this embodiment. The display mode descriptor provided in the descriptor area will be described with reference to FIG.
(15) A descriptor (descriptor area) belonging to the outside of the first level loop is an area for a descriptor indicating more detailed information regarding the entire layout setting table.

  FIG. 3 is a schematic diagram showing a data structure of a display mode descriptor (Display Mode Descriptor) in the layout setting table. “Bslbf” in the data notation in the figure is an abbreviation of “bit string, left bit first” (bit string notation, left bit is first). As described above, this display mode descriptor is provided in the descriptor area belonging to the first level loop in the layout setting table. That is, a certain display mode descriptor exists for each layout (when there are a plurality of devices, for each combination of layout and device).

Each data item in the display mode descriptor is described below.
(1) descriptor_tag (descriptor tag) is tag information indicating the type of descriptor. As the value of the tag information for the display mode descriptor, one of integers represented by 16-digit unsigned binary numbers is specifically assigned and stored.
(2) descriptor_length (descriptor length) represents the length (number of bits) of the descriptor.
(3) DMF (display mode) is a total of 4 bits of data indicating the presentation operation of the corresponding video content during reception and recording / reproduction. Specific values of the display mode will be described with reference to FIG.
(4) The reserved (unused area) is a data area that is not used at the present time. Note that this area may be used in the future.

  FIG. 4 is a correspondence diagram showing the correspondence between the display mode (DMF) values and meanings described above. As described above, the display mode is data composed of 4 bits (b4 to b1), where b1 is the most significant bit and b4 is the lower order bit. Among these bits, bits b4 and b3 represent the presenting operation of the layout at the time of video content reception (reception from the outside (broadcasting station or the like) via broadcast waves or IP communication). The remaining bits b2 and b1 represent the operation of presenting the layout when the video content is recorded / reproduced (when the video content recorded (recorded) on a recorder or the like is reproduced).

The display mode instructs one of the three presentation methods of “automatic display”, “automatic non-display”, and “selection display” for each layout. “Automatic display” means that the layout is displayed. “Auto hide” means that the layout is not displayed. “Selection display” means that the user of the receiver can select whether or not to display the layout by an operation or the like. That is, whether to display or not should be determined based on the user's selection.
Specifically, the user can select whether to display or not by an operation such as pressing a button on the remote control device. In the case of “automatic display” or “automatic non-display”, display / non-display cannot be selected by an operation from the user of the receiver.

  That is, the display mode is provided in a loop for each combination of layout number and device ID in the layout setting table. The display mode is provided in a display mode descriptor included in the descriptor area in the loop.

[Presentation when receiving]
When the value of the combination of bits b4 and b3 in the display mode is “00”, it means “automatic display upon reception”.
When the value of the combination of bits b4 and b3 in the display mode is “01”, it means “automatic non-display at the time of reception”.
When the value of the combination of bits b4 and b3 in the display mode is “10”, “selection display at reception” is indicated.
The value “11” of the combination of the display mode bits b4 and b3 is reserved for future use and is not used at this time.

[Presentation during recording / playback]
When the value of the combination of bits b2 and b1 in the display mode is “00”, it means “automatic display during recording / reproduction”.
When the value of the combination of bits b2 and b1 in the display mode is “01”, it means “automatic non-display during recording / playback”.
When the value of the combination of the bits b2 and b1 in the display mode is “10”, “selection display during recording / reproduction” is indicated.
The value “11” of the combination of bits b2 and b1 in the display mode is reserved for future use and is not used at this time.

  As described above, by using the display mode data, the presentation operation during reception and the presentation operation during recording / playback can be controlled independently of each other.

  FIG. 5 is a schematic diagram illustrating a specific example of screen presentation performed on the receiver 1 side based on information for controlling the layout. In the example shown in the figure, the receiver 1 displays different screens when the layout control is on (on) and off (off). In Super Hi-Vision broadcasting that is scheduled to be put to practical use, a multiplexed transmission method using MMT is adopted. By using MMT multiplexing system, video / audio, data broadcasting, caption broadcasting, and text super broadcasting data are separately multiplexed and broadcast from the broadcasting station to the receiver, and the MMT control information layout setting table and MPU presentation area are broadcast. With the specified descriptor, the receiver 1 can be forced to be L-shaped. In the example of display shown in the figure, the receiver 1 combines the broadcast video, the data broadcast content, the character superimpose, and the caption broadcast, and outputs the combined video. The layout control can be switched on / off in both directions.

When layout control is off, broadcast video and data broadcast content are always displayed on the entire screen. Therefore, in order to display both broadcast video and the like, superimpose characters and subtitles, the receiver 1 displays them in a superimposed manner.
On the other hand, when the layout control is on, the broadcast video or the like is reduced in order to display a character super or subtitle. In the example shown in the figure, the broadcast video or the like is displayed in a slightly reduced size in the lower left, and in the empty areas (in the example shown in the figure, the area along the upper side and the area along the right side) Subtitles are displayed.

  FIG. 6 is a schematic diagram showing a plane configuration for realizing the screen display shown in FIG. As shown in the figure, the receiver 1 controls to display four planes of a background plane, a multimedia plane, a caption plane, and a character superplane in a superimposed manner. Of these, the multimedia plane corresponds to the layout in the layout setting table of FIG.

(1) The background plane is configured by an array of horizontal 7680 pixels × vertical 4320 pixels, and each pixel has a pixel value of 8 bits for each of RGB (red, green, and blue). The color of the background plane is specified in the background color specification descriptor in the LCT.
(2) The multimedia plane is a plane having an array of horizontal 7680 pixels × vertical 4320 pixels, and each pixel has a pixel value of 8 bits or 10 bits for RGB (red, green, and blue). On this multimedia plane, broadcast video and data broadcast content are arranged. Graphics elements in the multimedia plane are synthesized by 256-level alpha blending.
(3) The caption plane is configured by an array of horizontal 7680 pixels × vertical 4320 pixels, and each pixel has a pixel value of 8 bits for each of RGB (red, green, and blue). The caption text is displayed on the caption plane. The subtitle text is the subtitle asset and transmitted by the MMT. Elements in this subtitle plane are synthesized by 256 stages of alpha blending.
(4) The character superplane is a plane composed of an array of horizontal 7680 pixels × vertical 4320 pixels, and each pixel has an 8-bit pixel value for each of RGB (red, green, and blue). The text of the character super is displayed on the character super plane. Character supertext is what is superimposed and transmitted by MMT. Elements in this character superplane are synthesized by 256 stages of alpha blending.

  FIG. 7 is a schematic diagram showing a specific example of the layout setting table. The layout setting table shown in the figure follows the table format described in FIG. Hereinafter, each data item included in the layout setting table will be described.

(1) number_of_loop (number of layout devices) is 2. Corresponding to each loop, “0” and “1” exist as layout_number (layout number) values.
(1-1) In the first layout loop, layout_number (layout number) is “0”.
(1-2) In the same loop, device_id (device ID) is “0”.
(1-3) In the layout, number_of_region (number of regions) is “1”.
(1-4) In the loop of the region, region_number (region number) is “0”.
(1-5) The left_top_pos_x (upper left horizontal position) of the area is “0”.
(1-6) The left_top_pos_y (upper left vertical position) of the area is “0”.
(1-7) The right_down_pos_x (lower right horizontal position) of the area is “100”.
(1-8) The right_down_pos_y (lower right vertical position) of the area is “100”. That is, the area occupies the entire screen.
(1-9) The layer_order (layer order) of the area is “0” (last column).
(1-10) Only the display mode descriptor exists in the descriptor area for the area. The descriptor_tag (descriptor tag) and descriptor_length (descriptor length) of the display mode descriptor are set as appropriate, but the description of the values is omitted here. The value of the display mode (DMF) in the layout is “0000” in bit string notation. That is, as described with reference to FIG. 4, the layout is automatically displayed at the time of reception and also automatically displayed at the time of recording and reproduction.

(2-1) In the second layout loop, layout_number (layout number) is “1”.
(2-2) In the same loop, device_id (device ID) is “0”.
(2-3) In the layout, number_of_region (number of regions) is “1”.
(2-4) In the loop of the region, region_number (region number) is “0”.
(2-5) The left_top_pos_x (upper left horizontal position) of the area is “0”.
(2-6) The left_top_pos_y (upper left vertical position) of the area is “20”.
(2-7) The right_down_pos_x (lower right horizontal position) of the area is “80”.
(2-8) The right_down_pos_y (lower right vertical position) of the area is “100”. That is, the area occupies approximately 80% on the left side in the horizontal direction and approximately 80% on the lower side in the vertical direction in the entire screen.
(2-9) The layer_order (layer order) of the area is “0” (last column).
(2-10) Only the display mode descriptor exists in the descriptor area for the area. The descriptor_tag (descriptor tag) and descriptor_length (descriptor length) of the display mode descriptor are set as appropriate, but the description of the values is omitted here. The value of the display mode (DMF) in the layout is “0010” in bit string notation. That is, as described with reference to FIG. 4, the layout is automatically displayed at the time of reception and is selectively displayed at the time of recording / reproduction.

  That is, the layout setting table shown in FIG. 7 shows the following settings. That is, a layout with layout_number = 0 is automatically displayed at the time of reception and automatically displayed at the time of recording and reproduction. A layout with layout_number = 1 is automatically displayed at the time of reception and is selectively displayed at the time of recording / reproduction.

  FIG. 8 is a schematic diagram illustrating an example of an MPU presentation area designation descriptor in an asset loop of a transmitted MP (MMT Package) table. MPU is an abbreviation for Media Processing Unit. In FIG. 5, (A) layout control OFF and (B) layout control ON correspond to the layout control OFF and ON shown in FIG. 5, respectively.

The example shown in FIG. 8 is an MPU presentation area designation descriptor for video assets.
In FIG. 9A, the descriptor_tag value “0x8003” indicates that this descriptor is an MPU presentation area designation descriptor. Descriptor_length (descriptor length) represents the size of the descriptor and is set to an appropriate value. In addition, the example shown in FIG. 5A includes one loop, mpu_sequence_number (MPU sequence number) set in the loop is XX, layout_number (layout number) is “0”, The region_number (region number) is “0”.
In FIG. 5B, descriptor_tag (descriptor tag) and descriptor_length (descriptor length) are the same as in FIG. The example shown in FIG. 5B includes one loop, mpu_sequence_number (MPU sequence number) set in the loop is YY, layout_number (layout number) is “1”, The region_number (region number) is “0”.
The above XX and YY represent appropriate values to be set.

  That is, in the MPU presentation area designation descriptor shown in FIG. 8, the layout control is turned off at the MPU sequence number XX, that is, the layout number “0” is designated. Further, the layout control is turned on at the MPU sequence number YY, that is, the layout number “1” is designated.

The operation of the layout control unit 31 based on the layout control illustrated in FIGS. 7 and 8 is as follows.
That is, the layout control unit 31 first receives mode identification information from the mode identification unit 30 for identifying whether the video to be output is currently being received or recorded / reproduced. . Further, the layout control unit 31 receives necessary information from the MMT decoder unit 15 among the information included in the layout setting table and the MP table as layout control information.

  The layout control unit 31 refers to which bit in the display mode (DMF in FIGS. 3 and 4) in the display mode descriptor (FIG. 3) based on the mode identification information received from the mode identification unit 30. Decide what should be. When the mode identification information indicates “when receiving”, the layout control unit 31 refers to the bits for receiving (bits b4 and b3 shown in FIG. 4) in the display mode. When the mode identification information indicates “recording / reproduction”, the layout control unit 31 refers to the recording / reproduction bits (bits b2 and b1 shown in FIG. 4) in the display mode.

  Then, the layout control unit 31 refers to the MPU presentation area designation descriptor in the MP table, and acquires the layout number and the area number for the corresponding MPU of the asset to be presented. And the layout control part 31 acquires the display mode contained in the display mode descriptor in a layout setting table about the combination of an applicable layout number and area number. Then, the layout control unit 31 acquires a 2-bit value corresponding to the acquired mode identification information among the acquired display modes. According to the 2-bit value (described in FIG. 4), it is determined whether the layout is automatically displayed, automatically hidden, or selected.

In the case of automatic display, the layout control unit 31 displays the layout regardless of whether or not the user has performed a selection operation and the selection result.
In the case of automatic non-display, the layout control unit 31 does not display the layout regardless of the selection operation by the user and the selection result.
In the case of the selection display, the layout control unit 31 determines whether or not to display the layout according to the result of the selection instruction input based on the selection by the user (including the result in the case of being selected in advance). To decide.

  The layout control unit 31 supplies the video composition unit 25 with the display / non-display control information determined for each layout. In response to this, the video composition unit 25 appropriately lays out the video passed from the video decoder unit 22, the subtitle text passed from the subtitle acquisition unit 23, and the superimpose text passed from the character super acquisition unit 24. To synthesize.

The layout control unit 31 appropriately adjusts the display size of other layouts when not displaying a certain layout.
That is, when there is a layout for displaying video and a layout for displaying subtitles, and when receiving or recording / playback, the layout control unit 31 does not reduce the video when the layout is not displayed. To display in full screen. That is, in the content that is supposed to display subtitles in an L-shaped area or the like, for example, when the layout is hidden, the layout control unit 31 does not reduce the video to an L-shaped image. Is displayed.
The same applies to the case where there is a layout for displaying an image and a layout for displaying a character superscript. When receiving or recording / playback, the layout control unit 31 reduces the image when the layout is not displayed. Control to display in full screen. In other words, in content that is to display a character superimpose in an L-shaped area, for example, when the layout is hidden, the layout control unit 31 does not reduce the video to an L-shaped image. Display on screen.

  As an example, since the display mode in layout number 1 shown in FIG. 7 is “0010” (bit expression), when the user selects not to display this layout during recording / playback, the layout control unit 31 Control may be performed so that display is performed using the layout number 0 instead of the number 1.

That is, in order to prevent the L-shaped screen from being displayed, the user can view the screen from which unwanted information is removed. Also, the video content can be viewed in a wider range within the screen.
In this way, by adding a display mode descriptor to the layout setting table of the MMT control signal, an L-shaped screen or the like is displayed or hidden depending on the viewer's selection or the like during reception or recording / playback. Such control is possible.

  FIG. 9 is a schematic diagram illustrating a configuration of a screen controlled by the layout control unit 31. FIG. 4A shows a configuration in which a video display area is provided on the lower left side of the screen, and an area along the upper side of the screen and an area along the right side are character super display areas. In FIG. 5A, a character super is displayed in an inverted L-shaped area. In addition, the video display area is an area that is smaller than the entire screen. For example, in television broadcasting, in the character super display area, bulletins such as earthquakes, typhoons, and other disasters are displayed. FIG. 5B shows a screen configuration in a state where the character super is not displayed. For example, by specifying the display mode in the display mode descriptor so that the video reduced to the inverted L shape added at the time of broadcast reception is set to “selection display” at the time of recording / playback, the user can You can choose to display the video on the entire screen. In the case of selection display, it is possible to perform switching such as displaying an image on the entire screen or reducing the display by a selection operation by a user's remote controller or the like.

  As described above, in the present embodiment, a “display mode descriptor” is added to the layout setting table included in the control information of the multiplexing method MMT for digital broadcasting, and it corresponds to each time broadcast reception and recording / reproduction. The layout can be controlled. For example, an L-shaped display or the like is forcibly displayed when a broadcast is received, and a viewer can freely select and erase the L-shaped display or the like when recording or reproducing.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings. In addition, description is abbreviate | omitted about the matter similar to the above-mentioned embodiment, and it demonstrates below focusing on the matter peculiar to this embodiment.

  FIG. 10 is a schematic diagram illustrating a data configuration of a layout setting table received by the receiver according to the present embodiment. In the figure, the data structure is represented by a language having a block structure. The number of bits represents the data size of each item included in the data structure. The data notation represents the data type of each item.

In the layout setting table used in the first embodiment, DMF (display mode) data is provided in the display mode descriptor. Then, a descriptor area for providing a display mode descriptor corresponding to the layout (and the combination with the device) is secured in the layout setting table. On the other hand, a structural feature of the layout setting table used in the present embodiment is that a data item called DMF (display mode) is directly provided in a loop relating to layout (and combination with devices). That is, in this embodiment, the data indicating the display mode is provided at a position other than the descriptor area. Specifically, an item of DMF (display mode) is provided after device_id (device ID) in the figure. That is, in this embodiment, the display mode descriptor is not used. Thereby, in this embodiment, it is not necessary to provide the descriptor area | region regarding layout (and combination with a device) provided in 1st Embodiment. On the other hand, in the present embodiment, since there is no such descriptor area, there is a possibility that a new descriptor area must be added when new information is added to the layout setting table in the future.
As described above, also in the present embodiment, the display mode is provided in a loop for each combination of layout number and device ID in the layout setting table.

  The data size of DMF (display mode) is 4 bits, which is the same as that in the first embodiment. In addition, the meaning of DMF (display mode), usage, and the like are the same as those in the first embodiment.

  Also in the receiver according to the second embodiment, only the position where the display mode is stored in the layout setting table is different, and the obtained actions, effects, and the like are the same as those according to the first embodiment.

  In addition, you may make it implement | achieve a part or all function of the receiver in each embodiment mentioned above with a computer. In that case, a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible disk, 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, a “computer-readable recording medium” dynamically holds a program for a short time, like 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 serving as a server or a client in that case may be included, and a program that holds a program for a certain time. The program may be a program for realizing a part of the above-described functions, or may be a program that can realize the above-described functions in combination with a program already recorded in a computer system.

Although a plurality of embodiments have been described above, the present invention can also be implemented in the following examples.
The configuration of the receiver is the same as that of the above-described embodiment. For example, the display mode automatic display / selection display / automatic non-display instruction may be different for each region (for example, for each broadcasting station). . As a result, for example, necessary information is forcibly displayed only in areas closely related to the content such as subtitles or text superimposing (display mode is “automatic display”), and the display mode is “selected” in other areas. “Display” or “auto hide”.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

  The present invention can be used in a receiver for receiving content distribution by television broadcasting or a content distribution service.

DESCRIPTION OF SYMBOLS 1 Receiver 11 Tuner part 12 IP communication part 14 Recording / reproducing part 15 MMT decoder part (multimedia decoder part)
21 Audio decoder unit 22 Video decoder unit 23 Subtitle acquisition unit 24 Character super acquisition unit 25 Video synthesis unit 26 Audio output unit 27 Video output unit 30 Mode identification unit 31 Layout control unit

Claims (6)

A multimedia decoder unit that receives a content signal in which a plurality of assets corresponding to media and control information are multiplexed, separates the content signal for each asset, and extracts control information;
Of the assets separated by the multimedia decoder unit, a video composition unit that synthesizes a video based on a video asset with a video based on at least one of a caption asset or a text super asset,
Identifying whether the content signal is being received or being played back by a recording device that has recorded the content signal in advance, and when receiving, a mode identification signal indicating the time of reception, A mode identification signal for outputting a mode identification signal indicating that recording / reproduction is being performed,
The layout setting information included in the layout control information is received from the multimedia identification unit, the layout control information included in the control information for controlling the video layout, and the mode identification signal is received from the mode identification unit. According to the display mode instruction in the table and based on whether the mode identification signal indicates reception or recording / reproduction, the video composition unit displays the specific asset when compositing the video A layout control unit for controlling whether or not
A video output unit for outputting a video obtained as a result of the synthesis by the video synthesis unit according to the control by the layout control unit;
A receiver comprising: The display mode in the layout setting table is any one of automatic display, automatic non-display, and selection display for each of the layouts defined in the layout setting table at the time of reception and recording / playback. Is to instruct
The selection display indicates that the layout should be determined or not to be displayed based on an input selection instruction.
The receiver according to claim 1. If the layout control unit does not display the video based on the subtitle asset and the character super asset as a result of the instruction by the display mode in the layout setting table, the layout control unit displays an area for displaying the video based on the video asset. To control the whole,
The receiver according to claim 2. The display mode is provided in a loop for each combination of layout number and device ID in the layout setting table.
The receiver according to any one of claims 1 to 3, characterized in that: The display mode is provided in a display mode descriptor included in a descriptor area in the loop.
The receiver according to claim 4.   The program for functioning a computer as a receiver as described in any one of Claim 1-5.

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