JP7113117B2 - Receiving device and receiving method, broadcasting signal transmission method - Google Patents

Description

TECHNICAL FIELD Embodiments of the present invention relate to a receiving device, a receiving method, and a method of transmitting a broadcast signal.

2. Description of the Related Art There is a technique of receiving data broadcast data together with video data of a broadcast program and displaying data broadcast information corresponding to a program selected by a user on a display screen.

JP 2010-258849 A

Here, if the user is also viewing a screen other than the screen displaying the video of the broadcast program, it is preferable that suitable information corresponding to the broadcast program can be displayed on these screens.
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a receiving apparatus, a receiving method, and a method of transmitting a broadcast signal that can display a suitable image corresponding to a broadcast program on a display screen.

In order to solve the above problems, the receiving device of the embodiment is composed of a receiving section, a display section, and a communication section, and the receiving section receives a broadcast signal.
Also, this broadcast signal includes video data or display data of a broadcast program and PSI or SI, and this PSI or SI includes identification information. Here, this identification information indicates a display screen for displaying the video data or displaying based on the display data among the first and second display screens.
When the identification information indicates the first display screen, the display unit is caused to display video data or display based on the display data. Further, when the identification information indicates the second display screen, the video data or the display data is transmitted from the communication section to the external device.

The figure which shows the usage form example of the receiving apparatus of embodiment. The figure which shows the system configuration example of the receiving apparatus of embodiment, and an information terminal. FIG. 4 is a diagram showing an example of a setting screen displayed by the receiving device according to the embodiment; 4 is a diagram showing a data configuration example of data received by the receiving device according to the embodiment; FIG. 4A and 4B are diagrams showing a data configuration example of data received by the receiving device of the embodiment, and a screen example displayed by the receiving device and the information terminal; FIG. FIG. 4 is a diagram showing an example of a screen displayed by the receiving device according to the embodiment; The figure which shows the processing flow regarding the setting process by the receiving apparatus of embodiment. The figure which shows the processing flow regarding data reception by the receiving apparatus of embodiment. The figure which shows the processing flow regarding data reception by the information terminal of embodiment.

Embodiments will be described below with reference to the drawings.
FIG. 1 is a diagram showing a usage example of a receiving apparatus according to this embodiment. The receiving device according to this embodiment is implemented as a television device 400, for example. Here, the broadcast base station 100 is a broadcast base station that transmits broadcast signals of broadcast programs, for example, and transmits video data and the like for each channel as streams in MPEG2-TS format, for example. The broadcast base station 100 also transmits display data for each broadcast channel as data described in a format such as HTML, CSS, or JavaScript (registered trademark).

The server device 200 transmits display data for each broadcast channel transmitted by the broadcast base station 100 . In this embodiment, the display data for each broadcast channel may be superimposed on the broadcast signal and transmitted by the broadcast base station 100, or may be transmitted from the server device 200 via the network. , or both. The contents of the display data include, for example, information related to the contents of the broadcast program (for example, performer information, related program information, subtitles in languages not included in MPEG2-TS of the broadcast signal, etc.), and video data from the broadcast signal. Additional video data, etc., which can be superimposed on the image to improve the image quality. In the present embodiment, the term display data is used for explanation, but the display data is data for displaying images such as characters and images on the display screen, and may be considered as a type of image data.

The stream superimposed on the broadcast signal includes ES (Elementary Stream) for each video and audio, and PSI (Program Specific Information)/SI (Service Information) related to these ES. The PSI/SI includes output device information, for example. The output device information includes an identifier indicating a screen on which display data transmitted from the broadcast base station 100, the server device 200, etc. is displayed, and a screen on which the video data of the TS stream in which the packet of the output device information is mounted is displayed. It contains an identifier etc. indicating Further, when a plurality of video streams are superimposed on the TS stream in which the packet of the output device information is loaded, the output device information may include an identifier indicating a screen for displaying each video stream.

As an example of the output device information, for example, a table such as an output device information table (OIT) is prepared in PSI/SI, or it is defined in TS 102 809 of DVB (Digital Video Broadcasting). In an existing table such as AIT (Application Information Table), "output to receiving device (1st screen) / output to external device (2nd screen) / output to both receiving device and external device" etc. It is conceivable to define it as a descriptor. Further, another example of output device information will be described later with reference to FIG.

When the television device 400 receives video data and display data from the broadcast base station 100, the server device 200, etc., the television device 400 determines whether the data is for the first screen or for the second screen by output device information or the like. Determine based on. The television device 400 displays the data for the first screen and outputs the data for the second screen to an external device (the information terminal 500 in this embodiment). Further, when the output device information of the TS stream of a certain channel superimposed on the broadcast signal includes an identifier for the output screen, the television device 400 outputs video data and display data for the own device and for the external device based on the identifier. separated into two and displayed on each device. The television device 400 displays data (display information) such as video data and display data of broadcast programs displayed on the first screen and the second screen based on identification information included in broadcast signals and signals from the server device 200. Separate and display on the first screen and the second screen.

In this embodiment, the first screen is, for example, the display screen of a device (television device 400) that receives broadcast signals, and the second screen is, for example, an external device (information terminal) that can communicate with the device that receives broadcast signals. However, the screens corresponding to the first screen and the second screen are not necessarily limited to this. That is, for example, the display screen of the television device 400 may be divided into two areas and these areas may be used as the first screen and the second screen.

FIG. 2 is a diagram showing a system configuration example of the television device 400 and the information terminal 500. As shown in FIG. In this embodiment, the television device 400 and the information terminal 500 can be connected by direct communication or communication via a home network, for example.

First, a system configuration example of the television device 400 will be described. The television device 400 includes a tuner 401, a demultiplexer 402, a communication section 403, a control section 404, a browser section 405, an HTTP server section 406, a storage section 407, a video decoding section 408, a GUI processing section 409, a display processing section 410, and a display section. 411 and the like.

A tuner 401 is a receiver that receives a broadcast signal, and a demultiplexer 402 is a separator that separates various data superimposed on the received broadcast signal. The demultiplexer 402 outputs the video data superimposed on the broadcast signal to the video decoding unit 408 , the audio data to the audio decoding unit (not shown), and the output device information and the display data to the control unit 404 .

If the output device information is included in the broadcast signal and the output device information includes an identifier related to the video data output device (display destination screen), the demultiplexer 402 selects the module based on the identifier. Video data may be output. That is, for example, when the TS of the broadcast signal includes a main video stream and a sub video (subtitles, etc.) stream, and the sub video stream is associated with an identifier indicating the second screen, the demultiplexer 402 A sub-video stream may be output to the control unit 404 . In this case, the sub-video stream is transmitted to the information terminal 500 under the control of the control unit 404. FIG.

A communication unit 403 executes communication with an external device. Here, the communication unit 403 may receive display data from the server device 200 . Then, when receiving the display data, the communication unit 403 outputs the display data to the control unit 404 . Further, when video data, display data, and an address are input from the control unit 404, the communication unit 403 transmits the data to the address.

When output device information, video data, and display data are input, the control unit 404 controls to output the data to a screen based on the output device information. That is, the control unit 404 outputs the image data and the display data indicated by the output device information for the first screen to the code unit 408 or the GUI processing unit 409 as images, and outputs the data for the second screen to the output device information. The displayed video data and display data are transmitted from the communication unit 403 to the information terminal 500 .

Note that, when a predetermined identifier is included in input video data and display data, the control unit 404 may output the identifier on a predetermined screen. That is, even if the aforementioned output device information is not input, it is determined which screen the data is for based on the predetermined identifier included in the video data and the display data, and the screen of the output destination is selected. ·decide.

Here, the control unit 404 includes a browser unit 405, and the browser unit 405 analyzes/processes file data described in HTML, CSS, and JavaScript (registered trademark) formats. If one file data contains display data for the first screen and second screen, the browser unit 405 extracts and separates them. If the display data for the first screen includes the Internet address of the image to be displayed on the display screen, the browser unit 405 uses the communication unit 403 to acquire data from the address. The browser unit 405 then outputs the acquired data to the video decoding unit 408 or the GUI processing unit 409 .

The control unit 404 also selects a device for displaying the video data and the display data for the second screen. Here, the control unit 404 may select, for example, a pre-registered device as a transmission destination of the video data and the display data, or display a setting screen for selecting a transmission destination device, and display the user's input to the screen. The device may be selected based on the operation. Then, the control unit 404 outputs the address of the device selected as the transmission destination, the video data, and the display data to the communication unit 403 .

The HTTP server unit 406 is a module having general web server functions. HTTP server section 406 outputs data stored in storage section 407 to browser section 405 in response to a request from browser section 405 .

The storage unit 407 has a function of storing video data and display data. The storage of video data and display data will be described later with reference to FIG.
A video decoding unit 408 decodes video data input from the demultiplexer 402 and browser unit 405 . The GUI processing unit 409 also generates display data in a format that can be processed by the display processing unit 410 from the display data input from the control unit 404 and described in HTML, CSS, JavaScript (registered trademark), or the like.

The display processing unit 410 then superimposes the video data decoded by the video decoding unit 408 and the display data generated by the GUI processing unit 409, and converts the superimposed data into a video signal in a format displayable by the display unit 411. The display unit 411 displays an image using the image signal.

Next, the information terminal 500 will be explained. The information terminal 500 includes a communication unit 501, a control unit 502, a browser unit 503, a storage unit 504, a video decoding unit 505, a GUI processing unit 506, a display processing unit 507, a display unit 508, and the like.

The communication unit 501 receives the video data and the display data for the second screen and the video data and the display data for the second screen transmitted from the television device 400 and outputs them to the control unit 502 .

The control unit 502 includes a browser unit 503, and when display data such as HTML, CSS, or JavaScript (registered trademark) format for the second screen is input, the control unit 502 outputs the display data to the GUI processing unit 506, and processes the data. Parse/process content. If the display data contains the Internet address of the video to be displayed on the display screen, the control unit 502 acquires data from the address using the communication unit 501 and sends the data to the video decoding unit 505 or the GUI processing unit 506. Output. Also, when a video data stream is input from the communication unit 501 , the control unit 502 outputs the data to the video decoding unit 505 .

The storage unit 504 has a function of storing video data and display data. The storage function will be described with reference to FIG.
The video decoding unit 505 decodes video data input from the control unit 502 . The GUI processing unit 506 also generates display data in a format that can be processed by the display processing unit 507 from display data in HTML, CSS, JavaScript (registered trademark) format, etc., input from the control unit 502 .

The display processing unit 507 then superimposes the video data decoded by the video decoding unit 505 and the display data generated by the GUI processing unit 506, and converts the superimposed data into a video signal in a format displayable by the display unit 508. The display unit 508 displays an image using the image signal.

FIG. 3 is an example of a display setting screen displayed by the television device 400. As shown in FIG. The control unit 404 of the television device 400 causes the display unit 411 to display the setting screen. A screen (apparatus) for displaying video data and display data received from a broadcast signal or a network is selected based on an operation input from the user on the setting screen.

On the screen of FIG. 3, any one setting can be selected from among "receiving device (first screen) only", "external device (second screen) only", and "both receiving device and external device". It's becoming Here, "receiving device (first screen) only" is a setting for displaying video data and display data only on a device (television device 400) that receives a broadcast signal. "External device (second screen) only" is a setting for displaying video data and display data only on an external device (information terminal 500) connected for communication with the television device. "Both receiving device and external device" is a setting for displaying video data and display data on either device (both screens).

FIG. 4 is a diagram showing a data configuration example of output device information that the broadcast base station 100 superimposes on the broadcast signal. In the example of FIG. 4A, display data aaa. txt and bbb. txt and ccc. txt and ddd. txt, the display screen and the channel are associated with each other. These display data may be superimposed on broadcast signals, and in this case, the television apparatus 400 receives the display data at the tuner 401 . Alternatively, the television device 400 may store an address for acquiring display data for each channel, and receive display data from the address when a channel is selected.

These text data are described in formats such as HTML, CSS, and JavaScript (registered trademark), for example. Note that the file format of the display data is not limited to the text format. Similarly, for video streams other than text data, the output destination screen is determined based on the output device information, and output according to the determination result. That is, in the output device information of FIG. 4A, information about a screen on which video of the stream is displayed may be associated with each video stream of the broadcast program superimposed on the broadcast wave.

where aaa. txt and ccc. txt are display data associated with channel 1, and aaa. txt is display data for the first screen, ccc. txt is display data for the second screen. That is, when the display setting of the display data of the television device 400 is set to "both the receiving device and the external device" in FIG. txt is displayed on the display screen of its own device, and ccc. txt to the information terminal 500 to transmit the ccc. txt to display an image.

Further, when the display setting of the television device 400 is "receiving device (first screen) only" in FIG. 3, the television device 400 displays aaa. txt is displayed on the display screen of its own device, but ccc. txt to the information terminal 500. Then, when the display setting of the television device 400 is "external device (second screen) only" in FIG. txt is sent to the information terminal 500 to display the image of the data, but aaa. txt is not displayed on the display screen of the device itself.

Also, bbb. txt and ddd. txt are the display data associated with channel 2, and bbb. txt is display data for the first screen, ddd. txt is display data for the second screen. However, bbb. txt and ddd. txt is aaa. txt and ccc. txt, both can be displayed on separate screens. For this reason, for example, when the setting of the television device 400 is "receiving device (first screen) only" in FIG. txt based video and ddd. txt can be displayed together. However, the control unit 404 does not necessarily use bbb. txt image and ddd. txt may not be displayed together, and whether or not to display them together may be set according to an operation input from the user, for example.

In the example of FIG. 4(B), the output device information does not store the file name of the display data but the address, unlike in FIG. 4(A). When the output device information of FIG. 4B is input, the control unit 404 extracts the address of the display data of the channel currently selected and displaying the video, and uses the communication unit 403 to extract the address of the display data from the address. Get data. Then, the control unit 404 displays the acquired data on the screen based on the output device information and the display setting on the display setting screen of FIG.

The output device information shown in FIGS. 4(A) and 4(B) includes contents such as a file name and a display destination for each display data each time a program is switched or a scene of a program is switched in one channel, for example. may be updated. Then, the broadcast base station 100 may transmit different suitable display data for each program or program scene being transmitted.

FIG. 5 is a diagram showing a data configuration example of display data. FIG. 4 illustrates the case where the display data for the first screen and the second screen are different files, but the display data for the first screen and the second screen are shown in FIG. 5(A). It may be described in one file as follows.

It is assumed that the display data file shown in FIG. 5A contains data P1 for the first screen and data P2 for the second screen. When this file is displayed on the screen using a normal browser, it is displayed like screen P10. At this time, an image P11 for the first screen and an image P12 for the second screen are arranged on the screen P10. Note that the image P12 indicates the content of the web page specified by the address included in the data P2.

In this embodiment, the control unit 404 recognizes, for example, the iframe element as the identifier of the display data for the second screen. That is, when the input display data includes a character string of <iframe> and </iframe> indicating an inline frame, the control unit 404 displays the character string between <iframe> and </iframe>. The display data for the first screen and the display data for the second screen are separated.

FIG. 5B shows a data configuration example of display data for the first screen separated by the control unit 404 and an example of a screen displayed using the display data. Inline frame elements are deleted from the display data of FIG. 5B, and a display screen using the display data becomes a screen P20.

FIG. 5C shows a data configuration example of display data for the second screen generated by the control unit 404 and an example of a screen displayed using the display data. The control unit 404 generates a new HTML document using the inline frames separated and extracted from the display data of FIG. 5A, and sets this as display data for the second screen. Since the frame size of the in-line frame is specified in the display data, the content of the Web page is displayed in the frame image P31 on the displayed screen P30.

FIG. 5D shows another data configuration example of the display data for the second screen generated by the control unit 404 and an example of a screen displayed using the display data. If the inline frame separated/extracted from the display data of FIG. 5(A) has the src attribute, the control unit 404 extracts the Internet address from the character string following the character string “src=”, and converts the address to the first Set as display data for two screens. On the display screen using the display data, the contents of the Web page specified by the address are displayed on the entire screen P40. In addition, it is possible to set based on the user's operation input which form of FIG.5(C) and FIG.5(D) is displayed.

Note that, in HTML and the like, the script program inside the inline frame and the script program on the parent node side may perform messaging (delivery of data) through an event system. In this case, if the control unit 404 simply separates the inline frames, messaging may not be possible. Therefore, the control unit 404 adds a script for supplementing messaging between the browser unit 405 and the browser 503 to the generated HTML for the browser unit 405 for the first screen and the generated HTML for the browser unit 503 for the second screen. (Javascript (registered trademark)) may be generated and embedded.

FIG. 6 is a diagram showing a display screen example when the display unit 411 of the television device 400 is set as the first screen and the second screen. In a screen R10 shown in FIG. 6A, a first area R11 and a second area R13 are arranged. The video of the broadcast program and the display data R12 for the first screen are displayed in the first area R11. Display data for the second screen is displayed in the second region R13. Note that the television device 100 does not necessarily display the video of the broadcast program in the first region R10, and may display the video in the second region R13. That is, the television device 400 can display the video of the broadcast program on the screen indicated by the output device information included in the PSI/SI information.

In the screens R20 and R30 shown in FIGS. 6B and 6C, the first screen and the second screen are displayed so as to be switchable. R31 is displayed.

6, the display data shown in FIG. 5B is used as the display data for the first screen, and the display data shown in FIG. 5D is used as the display data for the second display. Although shown, the display data used to display the first and second screens may be in other formats. That is, for example, the screen using the display data of FIG. 5A may be displayed on the second screen, and only the image of the broadcast program may be displayed on the first screen. As the display data for the second screen, data in the format of FIG. 5(D) is used instead of the format of FIG. bbb. co. An image based on the data obtained from the jp address may be displayed on the second screen. The type of display data to be used for display can be set based on the user's operation.

FIG. 7 is a diagram showing a processing flow example related to display settings by the television device 400. As shown in FIG.
First, the display unit 411 displays the display setting screen shown in FIG. 3 (S701). Subsequently, the control unit 404 receives an operation input from the user to an operation reception unit (not shown) (S702). Then, based on the operation input, the control unit 404 sets a device (screen) for displaying the image of the display data (S703), and the flow is completed.

FIG. 8 is a diagram showing an example of a processing flow relating to video data and display data reception and video display by the television device 400. As shown in FIG.
First, the television device 400 receives data (display information) to be displayed on the display screen, that is, video data and display data (S801). Here, the television device 400 may receive data superimposed on the broadcast signal by the tuner 401 , or may receive data stored in the server device 200 by the communication section 403 . Here, when the display setting of the television device 400 is set to “receiving device (first screen) only” in FIG. 3 (“receiving device only” in S802), the data received in S801 is contains data for the first screen (Yes in S803), the data for the first screen is displayed (S804). On the other hand, if the data for the first screen is not included in S803 (No in S803), the flow of FIG. 8 is completed.

Also, in S802, the television apparatus 400 sets the display setting to "external device (second screen) only" or "both receiving device and external device" in FIG. "Receiving device and external device"), and if the data received in S801 includes data for the second screen (Yes in S805), the data for the first screen and the data for the second screen are separated (S806). ). Here, as shown in FIG. 5, for example, when the portion surrounded by the iframe element is separated from one file and used as the display data for the second screen, the first screen in which the portion of the iframe element is deleted. There is a risk that the layout of the screen display data will collapse. Therefore, the control unit 404 may arrange the layout by inserting, for example, a div element or the like into the deleted iframe element.

Subsequently, the television device 400 determines whether or not an external device is communication-connected to itself (S807). Here, the television device 400 may determine whether or not a pre-registered external device is connected, for example. Then, if an external device is connected (Yes in S807), the television device 400 transmits data for the second screen to the external device (information terminal 500) (S808). Then, the television device 400 executes the process of S803 when the display setting is "both the receiving device and the external device", and completes the flow when the display setting is "only the external device (second screen)".

On the other hand, if the external device is not connected in S807 (No in S807), the television device 400 selects whether to save data that cannot be transmitted to the external device (S810). Note that the television device 400 may set whether or not to save the data in advance by, for example, a user operation, and the selection in S810 may be performed based on the setting. If the data is to be saved (Yes in S810), the television device 400 causes the storage unit 407 to store the data for the second screen (S811), otherwise discards the data for the second screen (S812). Then, when the external device is connected after storing the data for the second screen, the television device 400 may transmit the stored data to the external device.

Note that in S808 of this flow, for example, if a previously registered external device is not connected, the television device 400 may transmit screen data for the second screen to the information terminal 500 via a communication server (not shown). . That is, when the information terminal 500 is located outside the range of the home network or outside the range of direct communication with the television apparatus 400, but is located within the range of a network such as mobile communication, the communication server of the mobile communication is used. It is preferable to be able to transmit the data for the second screen at . However, since communication charges may be incurred in some cases, the format of the data to be transmitted in this case is preferably one with a small data size, such as the address format shown in FIG. 5(D). In this case, the television device 400 transmits the data for the second screen and the address of the information terminal 500 to the communication server.

Further, in this flow, the processing for separating the display data received from the outside of the television device such as the base station 100 or the server device 200 and displaying it on the television device 400 and the information terminal 500 has been mainly described. 400 may separate the data stored in its own device and display the separated data on separate devices. That is, for example, as shown in FIG. 4B, when specifying display data by an address, the address may specify an address within the television device 400 . In this case, the control unit 404 transmits the address to the HTTP server unit 406 and receives display data as a response to the transmission.

Next, with reference to FIG. 9, a flow relating to reception of display data and image display by the information terminal 500 will be described.
First, the information terminal 500 determines whether or not to receive data (display information) such as video data and display data transmitted from the television device 400 (S901). When data is transmitted from the television device 400, the information terminal 500 may make the determination by inquiring of the user and receiving an operation input, or may set whether or not to receive the data in advance. Also good.

After receiving the data (S902), the information terminal 500 determines whether to display the data (S903). If it is determined to display the data (Yes in S903), the information terminal 500 displays the data (S904). On the other hand, if it is not displayed (No in S903), the information terminal 500 determines whether to save the received data (S905). If it is determined to save the data (Yes in S905), the information terminal 500 causes the storage unit 504 to store the received data (S906), and if not to save the data, the data is discarded (S907).

In this embodiment, the receiving device is the television device 400 having a display screen, but the receiving device may not have a display screen. That is, the receiving device of the embodiment may be a device, such as a set-top box, which has a function of receiving broadcast signals and network signals and outputs video to an external display device. In this case, the receiving device executes the processing of the above embodiment with the display screen of the external display device as the first screen and the display screen of the external device (information terminal 500) connected by communication connection as the second screen. You can

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 100... Broadcasting base station 200... Server apparatus 400... Television apparatus 401... Tuner 402... Demultiplexer 403... Communication part 404... Control part 405... Browser part 406... HTTP server part 407... Storage part , 408... Video decoding unit 409... GUI processing unit 410... Display processing unit 411... Display unit 500... Information terminal 501... Communication unit 502... Control unit 503... Browser unit 504... Storage unit 505 ... video decoding section, 506 ... GUI processing section, 507 ... display processing section, 508 ... display section.

Claims (3)

In a receiving device comprising a receiving unit, a communication unit, and a display unit that displays a first display screen,
The external device displays a second display screen,
the broadcast signal includes display data and PSI or SI;
Identification information indicating a display screen of the display data among the first and second display screens is included in the PSI or the SI,
The receiving unit receives the broadcast signal,
A receiving device configured to transmit the display data from the communication unit to the external device when the identification information indicates the second display screen. the broadcast signal includes display data and PSI or SI;
identification information indicating a display screen of the display data among the first and second display screens is included in the PSI or the SI;
The receiving device displays the first display screen,
the receiving device receives the broadcast signal;
The receiving method, wherein the display data is transmitted from the receiving device to an external device when the identification information indicates the second display screen. A broadcast signal transmission method for transmitting a broadcast signal including display data and PSI or SI,
the PSI or the SI includes identification information;
the identification information indicates a display screen for the display data among the first and second display screens;
the first display screen is displayed on a receiving device;
A method of transmitting a broadcast signal, wherein the display data is transmitted from the receiving device to an external device when the identification information indicates the second display screen.

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