JP7062117B2 - Receiver and program - Google Patents

Description

The present invention relates to a receiving device for receiving a broadcast signal such as a television, and a program thereof.

Techniques for running an application program in a television broadcast receiver and displaying the output from the application program on the same screen as the television image are becoming common. For example, FIG. 2 of Patent Document 1 describes a configuration in which an output from a video recorder (35) and an output from an application control unit (42) are combined by a synthesis unit (36) and output to a display. ..

Japanese Unexamined Patent Publication No. 2013-15589

In order to combine the video of the TV broadcast and the output from the application, it is necessary that the resolutions of both videos (images) match. If the resolution of the TV broadcast video was constant, it was sufficient to simply match the resolution of the output from the application to the resolution of the TV video. However, if the resolution of the television broadcast video can change, the resolution of the output from the application may not match the television video well. If the resolutions of the two do not match, there may be a problem that the two cannot be arranged on the television screen in a well-balanced manner. The case where the resolution of the video of the TV broadcast can be changed is, for example, the case where the resolution of the video of the TV broadcast is intentionally lowered due to multi-organization or the like, or the broadcast signal is performed in the situation where the layer transmission is performed. This is the case when the resolution of the video changes dynamically according to the propagation status of.

It is conceivable to design the application so that the resolution of the image or the like output from the application can be switched, but there is a problem that the development amount of the application increases for that purpose. Further, when the resolution of the video of the television broadcast changes dynamically, it is difficult to control the output resolution from the application to follow the change of the resolution of the television broadcast without delay.

Further, for example, when the application is described in HTML5 (Hypertext Markup Language 5th Edition), the output resolution from the application may be known only when the web browser function of the receiving device interprets HTML. .. In such a case, it takes time to start the display because the memory for displaying the output from the application and the setting of the resolution parameter in the display engine are after the process of interpreting HTML. There is also the problem of doing it.

The present invention has been made based on the above-mentioned problem recognition, and can appropriately display the image / video output from the application on the screen even if the resolution of the video of the television broadcast changes. It provides the device and its program.

[1] In order to solve the above problems, the receiving device according to one aspect of the present invention includes a receiving unit for receiving a broadcast signal, a separating unit for separating a video signal from the broadcast signal received by the receiving unit, and the above. A video processing unit that restores the video signal separated by the separation unit as a displayable video, an application execution unit that executes an application, an application service descriptor acquisition unit that acquires an application service descriptor from the broadcast signal, and an application service descriptor acquisition unit. An application control unit that extracts information on the output resolution of the application from the application service descriptor acquired by the application service descriptor acquisition unit, information on the output resolution of the application extracted by the application control unit, and the video processing. It is characterized by comprising a presentation control unit that matches the resolution of the video and the output image from the application based on the resolution of the video restored by the unit.

[2] Further, in one aspect of the present invention, in the above-mentioned receiving device, when the resolution of the image and the output resolution of the application are different, the presentation control unit from the application so as to match the resolution of the image. It is characterized in that the resolution of the output image is changed to match the video with the output image from the application.

[3] Further, one aspect of the present invention is a program for making a computer function as any of the above-mentioned receiving devices.

According to the present invention, it is possible to perform appropriate display corresponding to various resolutions of video and various resolutions of output from an application.

It is a functional block diagram which shows the schematic functional structure of the receiving apparatus by embodiment of this invention. It is a schematic diagram which shows the structure of the application information table (AIT) by the same embodiment. This is a screen example for explaining the overlay processing performed by the presentation control unit according to the same embodiment. It is a figure which shows the correspondence relationship for adjusting the resolution between contents by the presentation control unit by the same embodiment, and shows the case where the output resolution from an application is matched with the resolution of a broadcast image. It is a figure which shows the correspondence relationship for adjusting the resolution between contents by the presentation control unit by the same embodiment, and shows the case where the resolution of a broadcast image is matched with the output resolution from an application. It is a figure which shows the correspondence relationship for adjusting the resolution between contents by the presentation control unit by the same embodiment, and shows the case where the image (video) with a higher resolution is matched with the lower resolution. It is a figure which shows the correspondence relationship for adjusting the resolution between contents by the presentation control unit by the same embodiment, and shows the case where the image (video) of the lower resolution is matched with the higher resolution. It is a functional block diagram which shows the schematic functional composition of the receiving apparatus by one of the modification of this embodiment. It is a functional block diagram which shows the schematic functional composition of the receiving apparatus by one of the further modification of this embodiment.

Next, an embodiment of the present invention will be described with reference to the drawings.
[Embodiment]
FIG. 1 is a functional block diagram showing a schematic functional configuration of a receiving device according to the present embodiment. The receiving device 1 has a function of receiving a television broadcast signal, outputting the video and audio thereof, and acquiring and executing an application program (hereinafter referred to as "application" or "app"). Note that one type of application is data content. As shown in the figure, the receiving device 1 includes a receiving unit 11, a separating unit 12, an AIT acquisition unit 14, an application control unit 15, an application acquisition unit 16, an application execution unit 17, and a video / audio processing unit 21. , A presentation control unit 22, and an output unit 23.

The receiving unit 11 receives a broadcast signal from the outside. At this time, the receiving unit 11 receives only the broadcast signal of the specific broadcast channel. The channel received by the receiving unit 11 is selected by a channel selection unit (not shown). The broadcast signal is transmitted from the transmission equipment on the broadcasting station side, and is transmitted as a radio wave or as an electric signal for cable television broadcasting. The broadcast signal received by the receiving unit 11 is a digital signal that is multiplexed including video, audio, text (subtitles, character supermarkets), data (data broadcasting, etc.), and control information. The receiving unit 11 demodulates the received broadcast signal and passes it to the separating unit 12.

The separation unit 12 separates the broadcast signal received by the reception unit 11 into video, audio, text, data, control information, and the like. The separation unit 12 passes the separated video signal and audio signal to the video / audio processing unit 21. Further, the separation unit 12 passes the application information table (AIT, Application Information Table) extracted from the broadcast signal to the AIT acquisition unit 14.
Further, the separation unit 12 passes the application code transmitted as a part of the broadcast signal to the application acquisition unit 16.

The AIT acquisition unit 14 acquires the AIT passed from the separation unit 12. AIT is a table that holds information about the application. The AIT acquisition unit 14 passes the information included in the acquired AIT to the application control unit 15. The information passed from the AIT acquisition unit 14 to the application control unit 15 includes information regarding the resolution of the image (video) output for each application.
Further, the AIT acquisition unit 14 passes the information necessary for acquiring the application (such as the identification information of the application and the information indicating the location of the application) described in the AIT to the application acquisition unit 16. The information indicating the location of the application is information indicating the position where the application code exists in the broadcast signal. The AIT is transmitted as a part of control information in the broadcast signal.
Alternatively, the AIT is transmitted as SI (Service Information or Signaling Information) information. Alternatively, the AIT is transmitted as part of the data broadcast.

The application control unit 15 controls the execution of the application according to the information acquired from the AIT acquisition unit 14. For example, the application control unit 15 according to the life cycle control information of the application included in the AIT (PRESS (acquisition), PREFETCH (acquired in advance and cached), AUTOSTART (automatic start), KILL (end), etc.). Control the life cycle of your app.
Further, the application control unit 15 extracts information on the output resolution from the application from the AIT passed from the AIT acquisition unit 14, and passes the information on the resolution to the presentation control unit 22.

The application acquisition unit 16 acquires the application code from the separation unit 12 according to the information received from the AIT acquisition unit 14. Further, the application acquisition unit 16 saves the acquired application code as needed. The application code is, for example, a data file described using HTML5 (fifth edition of hypertext markup language) and Javascript (registered trademark).

The application execution unit 17 executes the application based on the control from the application control unit 15.
The application execution unit 17 receives the application code to be executed from the application acquisition unit 16. The application execution unit 17 is realized as, for example, a web browser that interprets and displays HTML5 and executes the code of Javascript (registered trademark). The application execution unit 17 passes data representing the content to be displayed on the screen to the presentation control unit 22.

The video / audio processing unit 21 decodes the video and audio signals passed from the separation unit 12 and passes them to the presentation control unit 22. That is, the video / audio processing unit 21 restores the video signal separated by the separation unit 12 as a displayable video, and restores the audio signal as audio.

The presentation control unit 22 superimposes (overlays) the video (television broadcast video) data received from the video / audio processing unit 21 and the display content data received from the application execution unit 17 on the output unit 23. hand over. Further, the presentation control unit 22 passes the analog-converted audio signal to the output unit 23 based on the audio data received from the video / audio processing unit 21.
The presentation control unit 22 adjusts the resolution of the video of the television broadcast and the resolution of the output from the application, and overlays both. Specifically, the presentation control unit 22 outputs the video and the application based on the information regarding the output resolution of the application taken out by the application control unit 15 and the resolution of the video restored by the video / audio processing unit 21. Performs processing to match the resolution with the image. Details of this resolution adjustment will be described later.
Since the information of the output resolution of the application used by the presentation control unit 22 is acquired from the AIT, the resolution information can be recognized even before the application is actually read.
The output unit 23 outputs the video passed from the presentation control unit 22 to the screen. Further, the output unit 23 outputs the sound passed from the presentation control unit 22 from the speaker or the like.

Next, information regarding the output resolution from the application will be described. In the present embodiment, the resolution information of the image (video) output from the application is stored in the AIT and transmitted from the broadcasting station side to the receiving device 1. The transmitting device on the broadcasting station side transmits AIT in a state of being multiplexed in the broadcasting signal, and the receiving device 1 receives this.
FIG. 2 is a schematic diagram showing the configuration of AIT according to the present embodiment. AIT is a table that holds information about one or more applications.

As shown in the figure, there is an area of application descriptors loop including a plurality of application information descriptors in AIT. The type of each application information descriptor in the application information descriptor loop is identified by a descriptor tag. One of the descriptors included in this application information descriptor loop is the application descriptor.
And this application descriptor contains an application profile loop. An application profile loop contains multiple application profiles. Each application profile is a 16-bit unsigned integer. In this embodiment, one application profile represents the output resolution from the application. The output resolution value is set for each application.

As an example, the profile indicating the output resolution from the application should retain the value of the number of pixels in the horizontal direction. For example, if the output resolution from the application is 1920 (horizontal direction) x 1080 (vertical direction), the profile value is set to "1920" ("0x0780" in hexadecimal). When the output resolution is 3840 (horizontal direction) x 2160 (vertical direction), the profile value is set to "3840" ("0x0F00" in hexadecimal). When the output resolution is 7680 (horizontal direction) × 4320 (vertical direction), the profile value is set to “7680” (hexadecimal number “0x1E00”).

As another example, the profile indicating the output resolution from the application should hold an integer value that indicates the output resolution. For example, when the output resolution from the application is 1920 (horizontal direction) × 1080 (vertical direction), the value of the profile is set to “1” (“0x0001” in hexadecimal). When the output resolution is 3840 (horizontal direction) x 2160 (vertical direction), the profile value is set to "2" ("0x0002" in hexadecimal). When the output resolution is 7680 (horizontal direction) × 4320 (vertical direction), the profile value is set to “3” (hexadecimal number “0x0003”).

Further, as another example, a predetermined digit in the profile (for example, the lowest digit in the hexadecimal representation) holds a value indicating the output resolution. For example, when the output resolution from the application is 1920 (horizontal direction) × 1080 (vertical direction), the lowest digit of the profile expressed in hexadecimal is set to “0”. When the output resolution is 3840 (horizontal direction) × 2160 (vertical direction), the lowest digit of the profile expressed in hexadecimal is set to “1”. When the output resolution is 7680 (horizontal direction) × 4320 (vertical direction), the lowest digit of the profile expressed in hexadecimal is set to “2”.
In the above three examples, the case where the output resolutions are three types is illustrated, but the number of types of output resolutions is not limited to three and may be different.

Next, the details of the process of overlaying the broadcast video and the output from the application will be described.
FIG. 3 is a diagram of a screen example for explaining the overlay processing by the presentation control unit 22.
The figure (a) shows the image of a television broadcast. FIG. 3B shows an example of a screen output from the application. FIG. 3C shows a state in which a television broadcast image and a screen output from an application are superimposed and displayed. The difference between the figure (a) and the figure (c) is a horizontally long rectangular area arranged at the bottom of the screen, and this area is the output from the application. In the example shown in the figure (c), the output from the application includes the text of the news headline, the weather forecast, the menu for instructing the application program, and the like.

The creators of television broadcast programs produce this video with the intention that it will be displayed on the entire screen. Further, the creator of the application (multimedia content) shown in FIGS. (B) and (c) creates the application with the intention that the output from the application is appropriately arranged on the entire screen. The presentation control unit 22 controls the overlay method so that even if the resolution of the video of the television broadcast and the output resolution from the application are different, both are displayed in a good balance as shown in FIG. do. In other words, as a result of such control by the presentation control unit 22, the content having the lower resolution is prevented from being displayed in a small scale on the screen.

When the resolution of the video and the resolution of the output from the application are different, the presentation control unit 22 changes the resolution of the output from the application so as to match the resolution of the video. Conversely, the presentation control unit 22 may change the resolution of the video so as to match the resolution of the output from the application. In these cases, the presentation control unit 22 upsamples or downsamples the content to be changed as appropriate.
4 and 5 show a correspondence relationship of content resolution adjustment by the presentation control unit 22. FIG. 4 is a correspondence diagram when the presentation control unit 22 matches the output resolution from the application with the resolution of the broadcast video. FIG. 5 is a correspondence diagram when the presentation control unit 22 matches the resolution of the broadcast video with the output resolution from the application. The presentation control unit 22 may use either the method of FIG. 4 or FIG.

What is shown in FIG. 4 is a two-dimensional table, in which the horizontal direction corresponds to the output resolution from the application and the vertical direction corresponds to the resolution of the broadcast video. In this example, the output resolution from the application and the resolution of the broadcast video are 1920 pixels wide x 1080 pixels high (so-called "2K"), 3840 pixels wide x 2160 pixels high (so-called "4K"), 7680 pixels wide x 7680 vertical. There are three types of 4320 pixels (so-called "8K"). However, the type of resolution is not limited to these three types, and other resolutions may be used. When the correspondence shown in FIG. 4 is used, the output from the application is appropriately upsampled or downsampled to match the resolution of the broadcast video. If the output resolution from the application and the resolution of the broadcast video are originally the same, the overlay is performed as it is without changing the resolution. As shown in FIG. 4, (4-1) When the resolution of the broadcast image is 1920 pixels in the horizontal direction × 1080 pixels in the vertical direction, the resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is 1920 pixels in the horizontal direction × 1080 in the vertical direction. It is a pixel. Further, (4-2) When the resolution of the broadcast image is 3840 pixels in the horizontal direction × 2160 pixels in the vertical direction, the resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is 3840 pixels in the horizontal direction × 2160 pixels in the vertical direction. Further, (4-3) When the resolution of the broadcast video is 7680 horizontal × 4320 vertical, the resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is 7680 pixels horizontal × 4320 vertical.
That is, when the resolution of the video and the output resolution of the application are different, the presentation control unit 22 matches the video and the output image from the application by changing the resolution of the output image from the application so as to match the resolution of the video. Let me.

FIG. 5 is also a two-dimensional table similar to FIG. 4, and has three resolutions: horizontal 1920 pixels × vertical 1080 pixels, horizontal 3840 pixels × vertical 2160 pixels, and horizontal 7680 pixels × vertical 4320 pixels.
When the correspondence of FIG. 5 is used, the presentation control unit 22 adjusts the broadcast video to the resolution from the application by appropriately upsampling or downsampling. If the output resolution from the application and the resolution of the broadcast video are the same, the overlay is performed as it is without changing the resolution. As shown in FIG. 5, (5-1) When the resolution of the output from the application is horizontal 1920 pixels × vertical 1080 pixels, the resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is horizontal 1920 pixels ×. It has 1080 pixels in the vertical direction. Further, when the resolution of the output from the (5-2) application is 3840 pixels in the horizontal direction and 2160 pixels in the vertical direction, the resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is 3840 pixels in the horizontal direction × 2160 pixels in the vertical direction. be. Further, (5-3) When the resolution of the output from the application is 7680 horizontal × 4320 vertical, the resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is 7680 pixels horizontal × 4320 vertical.
That is, when the resolution of the video and the output resolution of the application are different, the presentation control unit 22 matches the video and the output image from the application by changing the resolution of the video so as to match the resolution of the output image from the application. Let me.

Further, the presentation control unit 22 may dynamically determine which content resolution is to be adjusted according to the actual resolution of each content.
6 and 7 show a correspondence relationship of content resolution adjustment by the presentation control unit 22. FIG. 6 is a correspondence diagram when the presentation control unit 22 matches the image (video) having the higher resolution with the image (video) having the lower resolution. FIG. 7 is a correspondence diagram when the presentation control unit 22 matches the image (video) having the lower resolution with the image (video) having the higher resolution. The presentation control unit 22 may use either the method of FIG. 6 or FIG. 7 instead of the method of FIGS. 4 and 5.

What is shown in FIG. 6 is a two-dimensional table, in which the horizontal direction corresponds to the output resolution from the application and the vertical direction corresponds to the resolution of the broadcast video. In this example, the output resolution from the application and the resolution of the broadcast video are 1920 pixels wide x 1080 pixels high (so-called "2K"), 3840 pixels wide x 2160 pixels high (so-called "4K"), 7680 pixels wide x 7680 vertical. There are three types of 4320 pixels (so-called "8K"). However, the type of resolution is not limited to these three types, and other resolutions may be used. When the correspondence of FIG. 6 is used, the presentation control unit 22 adjusts to the lower resolution by downsampling the image (video) having the higher resolution among the output from the application and the output from the broadcast video. .. If the output resolution from the application and the resolution of the broadcast video are the same, the overlay is performed as it is without changing the resolution. As shown in FIG. 6, (6-1) When either the resolution from the application or the resolution of the broadcast image is 1920 pixels in the horizontal direction × 1080 pixels in the vertical direction, the image (video) passed from the presentation control unit 22 to the output unit 23. The resolution of is 1920 pixels in width × 1080 pixels in height. (6-2) When either the resolution from the application or the resolution of the broadcast image is 3840 pixels in width × 2160 pixels in height, and the other resolution is 3840 pixels in width × 2160 pixels in height or more. The resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is 3840 pixels in the horizontal direction and 2160 pixels in the vertical direction. (6-3) When both the resolution from the application and the resolution of the broadcast image are horizontal 7680 × vertical 4320, the resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is horizontal 7680 pixels × vertical 4320 pixels. Is.
That is, when the resolution of the video and the output resolution of the application are different, the presentation control unit 22 matches the video with the output image from the application by changing the resolution of the video or the image so as to match the lower resolution. ..

FIG. 7 is also a two-dimensional table similar to FIG. 6, and has three resolutions: horizontal 1920 pixels × vertical 1080 pixels, horizontal 3840 pixels × vertical 2160 pixels, and horizontal 7680 pixels × vertical 4320 pixels.
When the correspondence of FIG. 7 is used, the presentation control unit 22 adjusts to the higher resolution by upsampling the image (video) having the lower resolution among the output from the application and the output from the broadcast video. .. If the output resolution from the application and the resolution of the broadcast video are the same, the overlay is performed as it is without changing the resolution. As shown in FIG. 7, (7-1) When either the resolution from the application or the resolution of the broadcast image is 7680 pixels in the horizontal direction and 4320 pixels in the vertical direction, the image (video) passed from the presentation control unit 22 to the output unit 23. The resolution of is 7680 pixels in the horizontal direction × 4320 pixels in the vertical direction. (7-2) When either the resolution from the application or the resolution of the broadcast image is 3840 pixels wide × 2160 vertical pixels and the other resolution is 3840 horizontal pixels × 2160 vertical pixels or less. The resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is 3840 pixels in the horizontal direction and 2160 pixels in the vertical direction. (7-3) When both the resolution from the application and the resolution of the broadcast image are horizontal 1920 × vertical 1080, the resolution of the image (video) passed from the presentation control unit 22 to the output unit 23 is horizontal 1920 pixels × vertical 1080 pixels. Is.
That is, when the resolution of the video and the output resolution of the application are different, the presentation control unit 22 matches the video with the output image from the application by changing the resolution of the video or the image so as to match the higher resolution. ..

The configuration and operation of the receiving device have been described above, but here, the device on the transmitting side will be described. The transmission equipment on the broadcasting station side sets the output resolution information for each application in AIT. Then, the transmission equipment multiplexes video, audio, data, control information, and the like, and transmits the digital broadcast signal. The above-mentioned AIT is also included in the digital broadcast signal.
A specific device configuration example for setting the output resolution information in AIT is as follows. The application production device for creating an application outputs a file having an application code created by the creator. In addition, the application production device outputs a file having information of the output resolution set at the time of application production. These files may be common. The above-mentioned application production device transmits a file containing an application code and a file containing output resolution information to the outside by a predetermined data exchange method. The application registration device receives these files. The application registration device receives these files by the above data exchange method. Then, the application registration device sets various information about the application in each predetermined area in the AIT.
At this time, the application registration device also sets the information of the output resolution from the application in the predetermined area in the AIT. The AIT created in this way is multiplexed with other data and transmitted as a part of the broadcast signal.

As described above, in the present embodiment, the information of the output resolution for each application is set in the AIT. Then, the AIT acquisition unit 14 in the receiving device 1 extracts the AIT from the signal separated by the separation unit 12. The extracted AIT is passed to the application control unit 15. The application control unit 15 passes information on the output resolution of the application to the presentation control unit 22. The presentation control unit 22 adjusts between the resolution of the video of the broadcast program and the output resolution of the application based on the information passed from the application control unit 15. Specifically, this adjustment is a process in which the presentation control unit 22 matches the resolution of the broadcast video with the output resolution from the application. At this time, when the two resolutions are different from each other, the presentation control unit 22 matches the content with the higher resolution (broadcast video or output from the application) to the one with the lower resolution, or selects the content with the lower resolution. Adjust to the higher resolution or adjust by either method. The receiving device 1 extracts information regarding the resolution of the broadcast video from the broadcast signal.

According to the present embodiment, the receiving device 1 can appropriately overlay the output (multimedia content) from the application and display it on the screen regardless of the resolution of the broadcast video. When the application is described as HTML and a style sheet (cascade style sheet, CSS), it is impossible for the receiving device 1 to estimate the output from the application by analyzing the data. can not cut.
However, it is possible to grasp the resolution more quickly and surely by obtaining the information of the output resolution of the application from the AIT as in the present embodiment than by obtaining the resolution from the application itself (HTML or the style sheet). That is, according to the present embodiment, since the information of the output resolution from the application is transmitted by AIT, the information of the resolution of the output from the application can be recognized in advance when the application is started.
Thereby, for example, the presentation control unit 22 according to the present embodiment can adjust the resolution between the broadcast video and the application output without delay.

Further, in the present embodiment, the information of the output resolution of the application is stored in the application profile in the AIT. With such a configuration, there is no need to newly define a descriptor in the AIT. In addition, there is no need to provide a new area other than the application descriptor. Moreover, there is no need to provide a new table.

It should be noted that some of the functions of the receiving device in the above-described embodiment may be realized by a computer. In that case, the program for realizing the internal function of this receiver is recorded on a computer-readable recording medium, and the program recorded on this recording medium is read by the computer system and executed. Is also good. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, and a storage device such as a hard disk built in a computer system. Further, a "computer-readable recording medium" is a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line, and dynamically holds the program for a short period of time. It may also include a program that holds a program for a certain period of time, such as a volatile memory inside a computer system that is a server or a client in that case. Further, the above-mentioned program may be for realizing a part of the above-mentioned functions, and may be further realized for realizing the above-mentioned functions in combination with a program already recorded in the computer system.

Although the embodiments have been described above, the present invention can be further implemented in the following modifications. If it is possible to combine them, a plurality of modifications described below may be combined and carried out.
[Modification 1]
In the above embodiment, the AIT acquisition unit 14 acquires the AIT extracted from the broadcast signal. In this modification, the AIT acquisition unit 14 acquires AIT from an external computer server device via a communication line such as the Internet. In this case, the receiving device 1 includes a communication input / output unit (not shown). The communication input / output unit can communicate with an external device by using an Internet protocol (IP) or the like. The AIT acquisition unit 14 may be able to acquire the AIT from both the broadcast signal and the external computer server device via the communication line.

[Modification 2]
In the above embodiment, the application acquisition unit 16 acquires the application code extracted from the broadcast signal. In this modification, the application acquisition unit 16 acquires an application code from an external computer server device via a communication line such as the Internet. In this case as well, the receiving device 1 includes a communication input / output unit, as in the above-described modification 1.

[Modification 3]
In the above embodiment, the information of the output resolution of the application is stored in the area of the application profile in the AIT. In this modification, a new descriptor for storing the information of the output resolution of the application is provided. Further, as a further modification, information on the output resolution of the application may be stored in another field in the AIT.

In the above "Modification 3", the case of "providing a new descriptor for storing the information of the output resolution of the application" has been described, and a specific example thereof is as follows. In this example, the transmitting device on the broadcasting station side transmits the broadcasting signal so as to include the information of the output resolution of the application in the MH-data coding method descriptor in the MPT. "MPT" is an abbreviation for "MMT package table". Further, "MMT" is an abbreviation for "MPEG Media Transport". Further, "MH" is an abbreviation for "MPEG-H".

FIG. 8 is a block diagram showing a schematic functional configuration of the receiving device according to this example. As shown in the figure, the receiving device 2 includes the MH-data coding method descriptor acquisition unit 31 in addition to the respective units provided in the receiving device 1 (FIG. 1).

The MH-data coding method descriptor acquisition unit 31 acquires the MH-data coding method descriptor from the signals separated by the separation unit 12. Then, the application control unit 15 retrieves information regarding the output resolution of the application from the MH-data coding method descriptor acquired by the MH-data coding method descriptor acquisition unit 31. As an example, the application control unit 15 obtains information regarding the output resolution of the application from the additional information (additional identification information) in the MH-data coding method descriptor acquired by the MH-data coding method descriptor acquisition unit 31. Take it out. Then, the presentation control unit 22 outputs the video and the application based on the information regarding the output resolution of the application taken out by the application control unit 15 and the resolution of the video restored by the video / audio processing unit 21. Match the resolution with the image.

When a plurality of applications are running in the receiving device 2, which application the information of the output resolution of the application in the MH-data coding method descriptor is associated with is determined by any of the following methods (a) to (d). It depends.

(A) In this method, only one type of information on the output resolution of the application is provided in the MH-data coding method descriptor, and the output resolution is applied to all the applications.
(B) In this method, a plurality of sets of information are stored in the MH-data coding method descriptor in a form of associating the identification information for each application with the information of the output resolution of the application. Then, for each application, the information of the corresponding output resolution is acquired by the identification information, and the output resolution is applied.
(C) In this method, a plurality of sets of information are stored in the MH-data coding method descriptor by associating the application attribute information (attribute information other than the above identification information) with the application output resolution information. Store. Then, the information of the corresponding output resolution is acquired for each attribute of the application, and the output resolution is applied. Here, the attribute of the application is information such as, for example, the provider of the application and whether or not the application is a broadcast managed application.
(D) Information of a plurality of output resolutions corresponding to the application may be stored in the MH-data coding method descriptor and transmitted by a method other than the above (a) to (c). ..

Also in this example, in order to match the resolution of the broadcast video with the resolution of the image output from the application, any of the methods shown in FIGS. 4, 5, 6 and 7 may be used. ..
For example, when the method shown in FIG. 4 is used, the presentation control unit 22 changes the resolution of the output image from the application to match the resolution of the video when the resolution of the video and the output resolution of the application are different. , Match the video with the output image from the application.

[Modification 4]
In the above embodiment, the information of the output resolution of the application is stored in the area of the application profile in the AIT. In this modification, a data item area for storing information on the output resolution of the application is provided in the application service descriptor (Application_Service_Descriptor) in the MPT (MP table, MMT package table). Specifically, the above application service descriptor is arranged in the MP table descriptor area (MPT_descriptors_byte) in the MPT. Then, the transmitting device on the broadcasting station side transmits the broadcasting signal so as to include the information of the output resolution of the application in the application service descriptor in the MPT.

FIG. 9 is a block diagram showing a schematic functional configuration of the receiving device according to this modification. As shown in the figure, the receiving device 3 includes an application service descriptor acquisition unit 32 in addition to each unit provided in the receiving device 1 (FIG. 1).

The application service descriptor acquisition unit 32 acquires the application service descriptor from the signals separated by the separation unit 12. Then, the application control unit 15 retrieves information regarding the output resolution of the application from the application service descriptor acquired by the application service descriptor acquisition unit 32. Then, the presentation control unit 22 outputs the video and the application based on the information regarding the output resolution of the application taken out by the application control unit 15 and the resolution of the video restored by the video / audio processing unit 21. Match the resolution with the image.

When a plurality of applications are running in the receiving device 3, which application the information of the output resolution of the application in the application service descriptor is associated with depends on one of the following methods (a) to (d).

(A) In this method, only one type of information on the output resolution of the application is provided in the application service descriptor, and the output resolution is applied to all the applications.
(B) In this method, a plurality of sets of information are stored in the application service descriptor in a form of associating the identification information for each application with the information of the output resolution of the application. Then, for each application, the information of the corresponding output resolution is acquired by the identification information, and the output resolution is applied.
(C) In this method, a plurality of sets of information are stored in the application service descriptor in a form of associating the attribute information of the application (attribute information other than the above identification information) with the information of the output resolution of the application. Then, the information of the corresponding output resolution is acquired for each attribute of the application, and the output resolution is applied. Here, the attribute of the application is information such as, for example, the provider of the application and whether or not the application is a broadcast managed application.
(D) Information on a plurality of output resolutions corresponding to the application may be stored in the application service descriptor and transmitted by a method other than the above (a) to (c).

As described above, in this modification, the method of signaling by adding the item of the resolution information of the content to the application service descriptor is adopted.
Also in this example, in order to match the resolution of the broadcast video with the resolution of the image output from the application, any of the methods shown in FIGS. 4, 5, 6 and 7 may be used. ..
For example, when the method shown in FIG. 4 is used, the presentation control unit 22 changes the resolution of the output image from the application to match the resolution of the video when the resolution of the video and the output resolution of the application are different. , Match the video with the output image from the application.

In the embodiment described above and a plurality of modifications thereof, the receiving device acquires the information of the output resolution from the application as a part of the control information in the broadcast signal. Therefore, the output resolution from the application can be set before the application execution unit (web browser function) performs the process of interpreting HTML. That is, the amount of memory that needs to be reserved for display can be calculated before HTML interpretation. Also, the resolution parameters in the display engine can be set before HTML interpretation. That is, the time required to start the display from the application can be shortened.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes designs and the like within a range that does not deviate from the gist of the present invention.

The present invention can be used for a television broadcast receiver or the like.

1, 2, 3 Receiver 11 Receiver 12 Separator 14 AIT acquisition unit (application information table acquisition unit)
15 Application control unit (application control unit)
16 Application acquisition department (application acquisition department)
17 Application execution part (Application execution part)
21 Video / audio processing unit (video processing unit)
22 Presentation control unit 23 Output unit 31 MH-Data coding method Descriptor acquisition unit 32 Application service descriptor acquisition unit

Claims (2)

A receiver that receives broadcast signals and
A separation unit that separates the video signal from the broadcast signal received by the reception unit, and
A video processing unit that restores the video signal separated by the separation unit as a displayable video, and
The application execution part that executes the application and
An application service descriptor acquisition unit that acquires an application service descriptor from the broadcast signal,
An application control unit that extracts information about the output resolution of the application from the application service descriptor acquired by the application service descriptor acquisition unit, and an application control unit.
A presentation that matches the resolution of the video and the output image from the application based on the information regarding the output resolution of the application extracted by the application control unit and the resolution of the video restored by the video processing unit. Control unit and
Equipped with
The output resolution of the application is 1920 × 1080, 3840 × 2160, or 7680 × 4320.
A receiver characterized by that. A program for operating a computer as the receiving device according to claim 1.

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