JP2013176105A - Display device, reception device, display method, television receiver, display system, program and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that allows a user to appropriately appreciate both video received by broadcasting and Internet content.SOLUTION: A television 10 which can receive video content and additional content including information related to the video content comprises a separation unit 12 which displays the video content on a display unit 16, and also displays the additional content on a tablet terminal 20.

Description

  The present invention relates to a display device capable of displaying video content and additional content such as BML content in digital broadcasting, and a receiving device capable of receiving video content and additional content. The present invention also relates to a display method and a display system in such a display device.

  In recent years, digitalization of broadcasts has progressed, and digital broadcast receivers can view not only broadcasts but also Internet services, and various broadcast services in which broadcasts and Internet services are integrated are being provided. Current television receivers capable of receiving such services are configured to display on a display screen together with broadcast content received by a tuner and net content received via a communication interface.

  For this reason, various techniques for displaying a plurality of display contents on a display device in a manner that makes it easier for the user to recognize the display contents have been proposed.

  As an example of such a technique, there is a technique for displaying contents to be displayed using a plurality of display devices, as disclosed in Patent Documents 1 to 5 below.

  For example, Patent Document 1 describes an operation system that can display data created in a PC window on a plurality of displays for each window.

  In Patent Document 2, for each of a plurality of application programs installed in a computer, a user designates a display to be used for display when the program is executed, and the program is displayed on the display designated by the user. A multi-display system for displaying windows is described.

  Patent Document 3 discloses a digital broadcast display device that extracts a partial image corresponding to a displayable image size from a broadcast image and displays it on a display when the image area of the broadcast image exceeds the displayable area of the display unit. Have been described.

  In Patent Document 4, a television image is reduced to a size suitable for the screen size of the sub-display, the reduced television image, a status image representing information such as remaining battery information, antenna status, and clock, Describes a mobile phone terminal that is selectively displayed by a user operation and displayed on a sub-display.

  In Patent Document 5, a first display means and a second display means smaller than the first display means are connected, and a part of the electronic program guide data displayed on the first display means is obtained. A digital broadcast receiver including presentation processing means for performing processing to be displayed on the second display means is described.

  As a method of simultaneously displaying the broadcast video and the net content in the display screen by digital broadcasting, (1) a method of displaying the video in full screen and displaying the net content superimposed on a part thereof, and ( 2) A method is generally used in which the video is reduced, the reduced video is displayed in a part of the display screen, and the net content is displayed in the remaining area.

JP 2008-276433 A (published November 13, 2008) JP 2008-164988 A (published July 17, 2008) JP 2007-110750 A (published April 26, 2007) JP 2007-19628 (published January 25, 2007) JP 2003-219301 A (released July 31, 2003)

  However, in the method (1), a part of the displayed video is hidden by the net content. Further, the method (2) has a problem that the video becomes small and difficult to see.

  In addition, normal net contents are created on the assumption that the user views while viewing a nearby display as in the case of viewing with a personal computer (PC) or a tablet terminal. On the other hand, broadcast content viewed on a television receiver is created on the premise of viewing from a position three times the height of the screen. For this reason, when the user views the network content on a stationary television receiver located at a distant position, it is difficult to see characters in the network content.

  As a method for improving the visibility of the net content, for example, a method for setting a character size to be enlarged by a user side operation, a content provider side between a normal net content and a TV-dedicated net content There is a method in which both are prepared and the playback side selects the appropriate one for playback. However, when the character size is enlarged, the number of characters that can be displayed in the screen is reduced, and some characters are not displayed. In addition, in the case of preparing Internet content dedicated to a television, the development cost of the content provider increases.

  The present invention has been made in view of the above-mentioned various problems, and the main purpose of the present invention is to allow a user to appropriately view both video received by broadcasting and net content related to the broadcast video. An object of the present invention is to provide a display device that can be used.

  In order to solve the above problems, a display device according to the present invention is a display device capable of displaying video content and additional content including information related to the video content on a display unit included in the device, It is characterized by comprising display control means for displaying video content on the display unit, and transfer means for transferring the additional content to a separate display device for displaying the additional content.

  Here, the information related to the video content includes, for example, information such as document data, layout, and still image.

  Accordingly, the display device according to the present invention can be operated by a user such as a tablet terminal at hand as the separate display device, and is suitable for viewing additional content carried and used. When is selected, it is possible to allow the user to suitably view both the video received through broadcasting and the additional content.

  The display method according to the present invention is a display method of a display device capable of displaying video content and additional content including information related to the video content on a display unit included in the own device, wherein the video content is displayed on the display unit. A display control step for displaying the additional content, and a transfer step for transferring the additional content to a separate display device for displaying the additional content.

  According to the said structure, the display method which concerns on this invention has an effect similar to the display apparatus which concerns on this invention.

  The display device according to the present invention is configured to receive each content including at least the video content and the additional content through a broadcast wave, and the content is transmitted from the broadcast wave for two-way communication. Extraction means for extracting meta information indicating whether or not reference information to be referred to is included is further provided, and the transfer means uses the meta information to determine whether or not the content includes the reference information for each content. It is desirable to transfer only the content determined to contain the reference information.

  Since the information related to the video content corresponds to the reference information, according to the configuration, the display device displays the additional content including information related to the video content on the separate display device. Thereby, the display device can allow the user to more appropriately appreciate the content related to the video content when the content related to the video content is displayed on the separate display device.

  The display device according to the present invention further includes synchronization control means for synchronously displaying the video content displayed on the display unit and the additional content displayed on the separate display device, and the synchronization control means includes: It is preferable to perform time synchronization with the separate display device by transmitting time information of the display device including the display unit to the separate display device. Further, the separate display device is configured to set time information of the own device using time information distributed from a predetermined time server, and separate from the video content displayed on the display unit. Synchronization control means for synchronously displaying the additional content displayed on the display device, wherein the synchronization control means uses the time information distributed from the time server to time with the separate display device. It is desirable to perform synchronization.

  When the additional content includes information for displaying the video content, the display device according to the present invention converts the additional content into new additional content from which the information has been deleted. It is desirable to further comprise.

  According to the configuration, when a display device that cannot display the video content based on the information is selected as the separate display device, the information does not need to be transferred to the separate display device. There is a further effect.

  Note that the present invention can be realized as a television receiver including the respective units of the display device, and includes the display device and the separate display device. Can also be realized.

  Furthermore, the present invention is a receiving device capable of receiving program content including video content and additional content including information related to the video content, wherein the receiving device externally transmits the additional content in the program content. It can also be realized as a receiving device that includes a transfer means for transferring to the display device.

  As the external display device, a user such as a tablet terminal can operate at hand, and when a display device suitable for viewing additional content to be carried is selected, the additional content is suitable for the user. Can be appreciated.

  The receiving device according to the present invention, when the additional content includes information for displaying the video content, converts the additional content into new additional content from which the information is deleted. It is desirable to further comprise means.

  According to the configuration, when a display device that cannot display the video content based on the information is selected as the external display device, the information does not need to be transferred to the external display device. There is a further effect.

  In order to solve the above problems, a display system according to the present invention includes a receiving device capable of receiving program content including video content and additional content including information related to the video content, and video content in the program content. A display system including a first display device for displaying and a second display device capable of displaying the additional content, wherein the receiving device displays the additional content in the program content as a second display device. And the second display device includes control means for controlling each device so that the receiving device and the first display device receive the same program content. It is a feature.

  According to the configuration, video content within the same program content is displayed on the first display device, and additional content is displayed on the second display device.

  Therefore, in the display system according to the present invention, the user selects a display device such as a television receiver that is generally viewed by the user as the first display device, and the second display device. When a display device that can be operated by a user such as a tablet terminal and is suitable for viewing additional content that is carried and used is selected, both the video received via broadcasting and the additional content are displayed. It is possible to allow the user to appreciate it appropriately.

  The display device according to the present invention is a display device capable of displaying video content and additional content including information related to the video content on a display unit included in the device, and displaying the additional content on the display unit. And a transfer means for transferring the video content to a separate display device for displaying the video content.

  Even in such a display device, it is possible to allow the user to appreciate both the video received through broadcasting and the additional content.

  Furthermore, a program for causing a computer to operate as the above-described display device or receiving device, and a computer-readable recording medium in which these programs are recorded are also included in the scope of the present invention.

  The display device according to the present invention is a display device capable of displaying video content and additional content including information related to the video content on a display unit included in the device, and displays the video content on the display unit. It is characterized by comprising display control means and transfer means for transferring the additional content to a separate display device for displaying the additional content.

  Accordingly, the display device according to the present invention can be operated by a user such as a tablet terminal at hand as the separate display device, and is suitable for viewing additional content carried and used. When is selected, it is possible to allow the user to suitably view both the video received through broadcasting and the additional content.

1 is a block diagram illustrating an outline of a communication system according to a first embodiment. (A) is a figure which shows the structure of broadcast data, (b) is a figure which shows an example of the syntax of PAT, (c) is a figure which shows an example of the syntax of PID = program_map_PID. . It is a figure showing an example of the BML document which a television receives. It is a figure which shows an example of the display screen displayed on a television and a tablet terminal. It is a figure which shows an example of the display screen of a tablet terminal. It is a block diagram which shows the outline of the communication system which concerns on Embodiment 2. FIG. It is a block diagram which shows the outline of the communication system which concerns on Embodiment 3. FIG. It is a figure which shows an example of the hierarchical structure of the display screen of a television. It is a figure which shows an example of the syntax of PMT.

Embodiment 1
An embodiment (Embodiment 1) of the present invention will be described as follows with reference to FIGS. In addition, although various restrictions preferable for implementing this invention are provided in the following description, the technical scope of this invention is not limited to description of the following embodiment and drawing. In particular, a tablet terminal is only an example of a mobile device, and the present invention is a mobile phone having a display unit such as a mobile phone terminal, a smartphone, a PDA (Personal Digital Assistant), a portable digital audio player, a digital camera, and a TV remote controller. It can also be applied to equipment.

(Outline of communication system 1)
FIG. 1 is a block diagram illustrating an outline of a communication system 1 according to the present embodiment. As shown in FIG. 1, the communication system 1 includes a television receiver (television, receiving device) 10 and a tablet terminal (second display device) 20 compliant with the digital broadcasting standards of each country. The communication system 1 is a system capable of displaying video content on the television 10 and document content on the tablet terminal 20 among the video content and document content (additional content) received by the television 10. Here, the document content is content composed of data related to video such as document data, layout, still image, and includes information (URL or the like) indicating an acquisition destination of the net content. For example, in Japanese digital broadcasting, BML (Broadcast Markup Language) content corresponds to document content.

  The TV 10 can reproduce and display both video content and document content on its own device according to the display mode, or can display only the video content on its own device and transfer the document content to a separate display device. You can also Hereinafter, unless otherwise specified, the latter will be described.

(TV 10)
The television 10 will be described. The television 10 is a display device that allows a user to view a video at a remote location. As shown in FIG. 1, the television 10 includes a receiving unit 11, a separation unit (display control unit, transfer unit) 12, a document conversion unit (document conversion unit, transfer unit) 13, a decoding unit 14 (display control unit), control. A unit (synchronization control means) 15 and a display unit 16 are provided.

  The receiving unit 11 receives broadcast data including video content distributed by broadcasting and document content. The receiving unit 11 supplies the received broadcast data to the separating unit 12.

  The separation unit 12 separates the video content from the broadcast data supplied from the reception unit 11 and supplies the video content to the decoding unit 14 so that the video content is displayed on the display unit 16. Further, the separation unit 12 separates predetermined document content from the broadcast data and supplies the document content to the document conversion unit 13 so that the document content is displayed on the tablet terminal 20. Here, the predetermined document content indicates content indicated as data to be transmitted to the tablet terminal, all document content, or the like. If the tablet terminal 20 and the television 10 are not connected, the predetermined document content is not transmitted to the tablet but is transmitted to the decryption unit 14. Even when the tablet terminal 20 is connected, if the user confirms in advance whether the predetermined document content is to be transmitted to the tablet terminal 20 and the user selects not to transmit, the television 10 displays the predetermined document content. You may make it transmit to the decoding part 14. FIG.

  The document conversion unit 13 transmits the document content supplied from the separation unit 12 to the tablet terminal 20 via a communication interface (not shown). In addition, the document conversion unit 13 performs conversion processing such as rewriting part of the document content information supplied from the separation unit 12, and transfers the converted document content to the tablet terminal 20. Details of the document conversion unit 13 will be described later.

  The decoding unit 14 decodes the video content supplied from the separation unit 12 and displayed on the display unit 16 and causes the display unit 16 to display the decoding processing result. Further, the decryption unit 14 notifies the control unit 15 that video content or the like is to be reproduced.

  When receiving the notification from the decryption unit 14, the control unit 15 performs control for synchronizing time between the video content displayed on the display unit 16 and the document content displayed on the tablet terminal 20. Specifically, the control unit 15 acquires time information of the television 10 and transmits it to the tablet terminal 20 via a communication interface (not shown). The control unit 15 acquires the time information of the tablet terminal 20 from the tablet terminal 20, and then updates the time information of the television 10 with the acquired time information. Alternatively, when the tablet terminal 20 is configured to update its own time information with time information from a predetermined NTP server (time server), the control unit 15 uses the time information from the same NTP server to The ten time information may be updated.

  The display unit 16 is a display that displays video content.

(Tablet terminal 20)
Next, the tablet terminal 20 will be described. The tablet terminal 20 is a content display device that a user can operate at hand. The tablet terminal 20 includes a reception unit 21, a transmission unit 22, a processing unit 23, a control unit 24, an input unit 25, and a display unit 26.

  The receiving unit 21 receives document content transmitted from the television 10. In addition, the receiving unit 21 receives other document data (for example, HTML content) distributed via a communication network from an external server, net content including still images and video data.

  The transmission unit 22 transmits information to an external server. For example, the transmission unit 22 transmits request information for acquiring the net content specified by the URL to a server specified by the URL described in the document content.

  The processing unit 23 controls the tablet terminal 20 in an integrated manner. The processing unit 23 decrypts the received document content and causes the display unit 26 to display it together with the net content received by the receiving unit 21. Further, the processing unit 23 notifies the control unit 24 that the content is to be displayed. Further, for example, the processing unit 23 instructs the control unit 24 to receive an instruction from the user received by the input unit 25. The processing performed by the processing unit 23 is not limited to this.

  The control unit 24 performs time synchronization with the television 10 using the time information transmitted from the television 10. When receiving the time information (t1) from the processing unit 23, the control unit 24 acquires the time information (t2) of the tablet terminal 20, and the transmitted time information and the time information of the tablet terminal 20 are one. Determine if you are doing it. When it is determined that there is a difference in time information (when the time information does not match), the control unit 24 forcibly changes the time of the tablet terminal 20 to a time obtained from the transmitted time information ( That is, t2 is updated with t1).

  The control unit 24 may receive time information distributed from an external NTP server (not shown) or the like, and change the time information of the tablet terminal 20 with the received time information. In the above method, the time of the tablet terminal 20 is discontinuous. If this degree of discontinuity is large, it may cause audio skipping or video skipping. For this reason, when the degree of discontinuity is large, processing such as changing in stages may be performed. For example, when changing in N stages (N is an arbitrary natural number), the amount of change at a time is | t1-t2 | / N.

  The input unit 25 receives an instruction from the user and notifies the processing unit 23 of the instruction.

  The display unit 26 is a display that displays the document content received from the television 10 by the receiving unit 21. The display unit 26 can also display the net content distributed from the external HTTP server designated in the document content or by user input or the like.

(Broadcast data structure)
Next, in the present embodiment, the configuration (data structure) of broadcast data received by the television 10 will be described with reference to FIGS. 2A is a diagram showing a configuration of broadcast data in the present embodiment, FIG. 2B is a diagram showing an example of the syntax of PAT, and FIG. 2C is a diagram showing PID = program_map_PID. It is a figure which shows an example of the syntax of. FIG. 9 is a diagram illustrating an example of the syntax of the PMT.

  In FIG. 2, broadcast data of MPEG-2 TS (Transport Stream) system is shown as an example of broadcast data. The configuration of the broadcast data is not limited to this.

  As shown in FIG. 2A, the broadcast data is composed of a plurality of TS packets each having 188 bytes. A TS packet is composed of a header and a payload. The header includes control information, and the payload includes components such as divided video data and audio data. The header control information includes information such as a packet identifier (PID) indicating what kind of component the TS packet contains.

  A TS packet with PID = 0 (0x00) is called a PAT (Program Association Table), and as shown in the syntax shown in FIG. 2B, the payload part includes a PID (program_map_PID) of a 13-bit PMT (Program Map Table). Is included.

  A TS packet of PID = program_map_PID includes information such as PID of each component constituting broadcast data as shown in the syntax of FIG. That is, each PID is represented by a set of 8-bit stream_type and 13-bit elementary_PID. For example, Stream_type is defined as stream_type = 0x01 for video data, stream_type = 0x03 for audio data, and the like. In the following description of the present embodiment, for convenience, PID (AUDIO_PID) representing audio data is “A”, PID (VIDEO_PID) representing video data is “V”, and PID (DATA_PID) representing BML data is “D”. , PID (EVENT_PID) representing an event message (for example, EPG) is expressed as “E”.

  In the present embodiment, the PMT in the broadcast data includes information indicating that the target component is interactive data and data to be transmitted to the tablet terminal. That is, as shown in FIG. 9, intractive_flag which is 1 bit of the reserved area of the PMT syntax is used, and when this is 1, data including information referred to for bidirectional communication, that is, both Indicates that it is also tropism related data.

  For example, for BML data that is interactive data, “interactive_flag” indicating that the target component is interactive data is set to 1. Alternatively, a value (eg, 0x7F) indicating “INTERACTIVE_DATA” may be set as the stream_type (meta information). In any case, in the following description of the present embodiment, for convenience, the PID of a TS packet including “INTERACTIVE_DATA” is expressed as “I” as in the case of AUDIO_PID.

  Thus, the broadcast data in the present embodiment includes information indicating that the target component is interactive data.

(About the separation unit 12)
Next, the process of the separation unit 12 will be described in detail. When the broadcast data as shown in FIG. 2 is supplied from the reception unit 11, the separation unit 12 analyzes the PAT that is a packet with PID = 0, and acquires PMT_PID. Next, the separation unit 12 extracts the PMT from the packet with PID = PMT_PID. Thereafter, the extracted PMT is analyzed, and PIDs (“A”, “V”, “D”, and “E”) of each component are acquired. Further, it is determined whether or not each component is interactive data by the method described above, and “I” is acquired.

  Thereafter, when the PID of each TS packet is “I”, the separation unit 12 supplies the document conversion unit 13, and otherwise supplies it to the decryption unit 14. Note that the component having the PID “I” may also include timing information such as time information of the component (for example, information indicating the playback time of the BML data, an event message including the time to fire the BML script, etc.). is there.

  As described above, the separation unit 12 plays a role of separating each component indicated as interactive data in the PMT and each component indicated as not interactive data.

(About the document conversion unit 13)
Next, the document conversion unit 13 will be described with reference to FIGS. FIG. 3 is a diagram illustrating an example of the BML document when the document data received by the television 10 is a BML document. 4 shows the screen configuration of the display unit 16 when the TV 10 displays the BML content and the video content on the TV 10 when the TV 10 receives the BML document of FIG. 3, and the tablet terminal 20 displays the BML content. It is the figure which contrasted and showed the screen structure of the display part 26 in the case of doing on the right side.

  The document conversion unit 13 deletes a portion of the BML document as shown in FIG. 3 that is not used by the tablet terminal 20 and transmits this document to the tablet terminal 20. The underlined portion in FIG. 3 is a character string indicating the video content currently being broadcast. Since the tablet terminal 20 does not display the broadcast video content, it cannot be used even if such information is received. Therefore, in order to eliminate the waste of receiving and processing information that cannot be used by the tablet terminal 20, the document conversion unit 13 includes, for example, “data =” / − 1 ”as shown by the underlined portion in FIG. A part not used in the tablet terminal 20 such as an object tag (an object tag referred to in order to display an image in FIG. 3) is rewritten into an appropriate form and transmitted to the tablet terminal 20. On the other hand, the television 10 that has read the description of the underlined portion in FIG. 3 displays the video 101 according to the description, as shown on the left side of FIGS. 4 (a), 4 (b), and 4 (c). This is displayed on the part 16.

  As an example of rewriting of the document conversion unit 13, for example, a case where the object tag is replaced with data (for example, a still image, text, etc.) 201 that can be displayed on the tablet terminal 20 can be considered. In this case, when the BML content received from the television 10 is played back, the tablet terminal 20 is shown as an area where the video 101 should be displayed in the BML document before document conversion, as shown on the right side of FIG. The BML content is displayed after the data 201 is displayed in the area.

  Further, the document conversion unit 13 may simply delete the object tag from the BML document before document conversion. In this case, when the BML content received from the television 10 is played back, the tablet terminal 20 is shown as an area where the video 101 should be displayed in the BML document before document conversion, as shown on the right side of FIG. The BML content is displayed after leaving the area blank.

  Furthermore, when the television 10 receives a BML document in which text 102 is displayed at the bottom of the video 101 as shown on the left side of FIG. 4C, the document conversion unit 13 displays the video 101. The BML document is converted so that the text 102 is displayed in the area shown as the power area and the area shown as the area where the text 102 should be displayed is blank. In this case, the BML content is displayed on the display unit 26 of the tablet terminal 20 with a screen configuration as shown on the right side of FIG.

  Note that the document conversion unit 13 may transmit a BML document as shown in FIG. 3 to the tablet terminal 20 as it is.

  In addition, as another processing method of the document conversion unit 13, the description has been given by taking the BML document as an example. However, a configuration may be adopted in which XSLT (eXtensible Style Language Transform) is interpreted and converted based thereon. In this case, the document in the conversion unit can be applied in a format other than BML.

  In this way, the document conversion unit 13 converts the BML content into content that can be displayed on the tablet terminal 20. As a result, the document conversion unit 13 can transmit only the content to be displayed on the tablet terminal 20.

  The communication between the television 10 and the tablet terminal 20 uses, for example, a wireless LAN, Bluetooth (registered trademark), ZigBee (registered trademark), or the like.

(About the processing unit 23)
Next, the processing unit 23 will be described. The processing unit 23 adjusts the BML content transmitted from the television 10 to a size that can be displayed on the display unit 26 and displays the BML content on the display unit 26. The processing unit 23 can also display the net content received by the receiving unit 21 via the communication interface together with the BML content on the display unit 26. As described above, the content received via the communication interface is not only the content based on the URL described in the BML content, but also the URL directly designated by the user or the URL indicated by another HTML document. Either case may be used. An example of the display screen of the tablet terminal 20 at this time is shown in FIG.

  As shown in FIG. 5, the tablet terminal 20 displays BML content (data from broadcasting) on the right side of the display unit 26, and displays net content (data from communication) on the left side of the display unit 26. As described above, the tablet terminal 20 can simultaneously display the BML content and the net content.

(Advantages of TV 10)
As described above, the television 10 capable of receiving video content and document content displays the video content on the display unit 16, and transfers the document content to be displayed on the display unit 26 by the tablet terminal 20 to the tablet terminal 20. To do. Since the tablet terminal 20 is a display device that allows the user to view the net content more suitably than the television 10, the user can preferably view both the video received via broadcasting and the net content.

  Moreover, since such a tablet terminal 20 receives the operation from a user, it can also be used as a remote controller.

  In addition, by synchronizing the video content and the BML content, the timing of the video displayed on the television 10 and the BML content displayed on the tablet terminal 20 can be matched.

  In the above description, the video content is transferred to the display unit 16 and the document content is transferred to the tablet terminal 20 and displayed. However, if “D” is replaced with “A” in the above description, the document content is reversed. Can be applied to the display unit 16 when the audio is transferred to the tablet terminal 20 among the video contents. Performing voice output with the tablet terminal 20 at hand is effective, for example, for elderly people who are hard to hear. Further, when transferring both audio and video of the video content, the document conversion unit 13 does not need any special processing, and may be transferred to the tablet as it is.

[Embodiment 2]
Hereinafter, another embodiment (Embodiment 2) of the present invention will be described with reference to FIG. FIG. 6 is a block diagram showing an outline of the communication system 2 according to the present embodiment. As shown in FIG. 6, the communication system 2 includes a television receiver (television) 30, an adapter (receiving device) 40, and a tablet terminal (second display device) 50.

  Since the television 30 is a commonly used television receiver, a description thereof is omitted.

  The adapter 40 is a device that can receive broadcast data received by the television 30 by being attached to the television 30. As shown in FIG. 6, the adapter 40 includes a receiving unit 41, a separating unit 42, and a document converting unit 43.

  Since the reception unit 41 and the document conversion unit 43 perform the same processing as the reception unit 11 and the document conversion unit 13, respectively, description thereof is omitted.

  The separation unit 42 supplies document content such as BML content to the document conversion unit 13 so that the document content such as BML content supplied from the reception unit 41 is displayed on the tablet terminal 20. The separation unit 42 performs the same processing as the separation unit 12 described in the first embodiment except that the video content supplied from the reception unit 41 is discarded.

  Similar to the tablet terminal 20, the tablet terminal 50 is a content display device that can be operated by the user. The tablet terminal 50 receives and displays document content such as BML content transmitted from the adapter 40 and content (for example, net content) distributed from another device such as an external server.

  The tablet terminal 50 also includes channel selection buttons (physical buttons or buttons implemented by software). When the pressing of the button is detected, a control unit (not shown) of the tablet terminal 50 transmits a channel selection signal to the television 30 and the adapter 40 by infrared communication or the like. Thereby, the television 30 and the adapter 40 receive the same broadcast data (program content), and the tablet terminal 50 displays the BML content corresponding to the television 30. The channel selection signal to the television 30 may be transmitted from the adapter 40 instead of from the tablet terminal 50.

  As described above, the television 30 and the tablet terminal 50 can be linked by using the adapter 40 by using the television 30 which is a commonly used television receiver. Both the received video and the net contents can be suitably viewed by the user.

[Embodiment 3]
Hereinafter, another embodiment (Embodiment 3) of the present invention will be described with reference to FIG. 7 and FIG. FIG. 7 is a block diagram showing an outline of the communication system 3 according to the present embodiment. FIG. 8 is a diagram showing an example of the logical structure of the display screen of the television receiver (television) 30 according to the present embodiment.

  First, the hierarchical structure of the display screen of the television 30 will be described with reference to FIG. The display screen of the television 30 includes a screen display (OSD (OSD), such as a video plane for displaying video, a graphic plane for displaying graphics, a graphic (bidirectional) plane for displaying interactive graphics, and a channel switching icon. On Screen Display)). The television 30 can display each medium in an appropriate form by superimposing these planes. Note that the video plane may display a moving image, a still image, or the like in addition to the video. The graphic plane and the graphic (bidirectional) plane may display information such as characters in addition to the graphic.

(Communication system 3)
Next, the communication system 3 according to the present embodiment will be described. As shown in FIG. 7, the communication system 3 includes a television (display device) 60 and a tablet terminal (separate display device) 70.

  For convenience of explanation, members having the same functions as those in the drawings described in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

(TV 60)
The television 60 will be described. The television 60 is a display device that allows a user to appreciate at a remote location. As shown in FIG. 7, the television 60 includes a receiving unit 11, a separating unit (display control means) 62, a video decoding unit 63, a graphic decoding unit 64, a graphic (bidirectional) decoding unit 65, a display unit 66, and a control unit 67. It has.

  The separation unit 62 supplies the video content to the video decoding unit 63 and the graphic decoding unit 64 so that the video content supplied from the reception unit 11 is displayed on the display unit 66. Further, the separation unit 62 supplies the graphic content to the graphic (bidirectional) decoding unit 65 so that the graphic content (additional content) supplied from the reception unit 11 is displayed on the tablet terminal 70. If the tablet terminal 70 and the television 60 are not connected, the graphic (bidirectional) content is not transmitted to the tablet terminal 70 but is transmitted to the graphic decoding unit 64. Even if the tablet terminal 70 is connected, if the user confirms in advance whether the graphic (bidirectional) content is to be transmitted to the tablet terminal 70 and the user selects not to transmit the graphic (bidirectional) content, the television 60 displays the graphic (bidirectional) content. ) The content may be transmitted to the figure decoding unit 64.

  The video decoding unit 63 decodes the video included in the video content supplied from the separation unit 62 and creates a video plane. The video decoding unit 63 supplies the created video plane to the display unit 66.

  The graphic decoding unit 64 decodes the graphic included in the video content supplied from the separation unit 62 and creates a graphic plane. The graphic decoding unit 64 supplies the generated graphic plane to the display unit 66.

  Note that the video decoding unit 63 may decode a moving image, a still image, and the like in addition to the video. Further, the graphic decoding unit 64 may decode characters and the like in addition to the graphic. Further, the figure decoding unit 64 may create an OSD plane.

  The graphic (bidirectional) decoding unit 65 decodes the graphic content supplied from the separation unit 62 and supplies the decoded data (drawing data) to the control unit 67. Here, the drawing data includes a bitmap, size information, and the like necessary for creating a graphic (bidirectional) plane.

  The display unit 66 superimposes and displays the video plane supplied from the video decoding unit 63 and the graphic plane supplied from the graphic decoding unit 64. Note that the display unit 66 may not be configured integrally with the television 60 but may be configured separately from the television 60 (first display device).

  The control unit 67 transmits the drawing data supplied from the graphic (bidirectional) decoding unit 65 to the tablet terminal 70.

(Tablet terminal 70)
Next, the tablet terminal 70 will be described. The tablet terminal 70 is a content display device that can be operated by a user. The tablet terminal 70 includes a reception unit 21, a transmission unit 22, a processing unit 23, a control unit 71, an input unit 25, and a display unit 26.

  The control unit 71 receives the drawing data transmitted from the television 30 and converts the drawing data into a state that can be displayed on the display unit 26. That is, the control unit 71 generates, for example, a graphic (bidirectional) plane. The control unit 71 supplies the generated graphic (bidirectional) plane to the processing unit 23.

  The processing unit 23 causes the display unit 26 to display the graphic (bidirectional) plane supplied from the control unit 71.

  In this way, even in the television 60 that displays broadcast data on the display unit 66 using the created plane, it is possible to allow the user to appropriately view both the video and the net content received through the broadcast. it can.

[Additional Notes]
In the first embodiment, a television receiver compliant with a digital broadcasting standard such as ARIB is adopted as a display device, and video content is displayed on the television receiver, and BML content that is document content is displayed on the tablet terminal. However, the present invention is not limited to this.

  For example, a television receiver compliant with the DVB standard may be adopted as the display device. In this case, for example, the display device displays the video content on the television receiver, and also displays the document content described in the broadcast data description language such as DVB-J or DVB-HTML on the tablet terminal. May be.

[Program and recording medium]
Moreover, each block of the television 10, the television 60, and the adapter 40 described above may be configured by hardware logic, or may be realized by software using a CPU as follows.

That is, the television 10, the television 60, and the adapter 40 include a CPU (central processing unit) that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, and a RAM ( random access memory), a storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is to provide program codes (execution format program, intermediate code program, source program) of control programs (authentication programs) for the television 10, television 60, and adapter 40, which are software for realizing the functions described above, on a computer. This can also be achieved by supplying the readable recording medium to the television 10, television 60 and adapter 40, and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU). It is.

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Moreover, the television 10, the television 60, and the adapter 40 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Further, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR (high data rate), mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be suitably used for a display device such as a television receiver.

1 Communication System 10 Television (Display Device)
11 receiving unit 12 separating unit (display control means, transfer means)
13 Document conversion unit (document conversion means, transfer means)
14 Decoding unit (display control means)
15 Control unit (synchronous control means)
16 Display unit 20 Tablet terminal (separate display device)
21 receiving unit 22 transmitting unit 23 processing unit 24 control unit 25 input unit 26 display unit 2 communication system 30 television (first display device)
40 Adapter (receiving device)
41 receiving unit 42 separating unit 43 document converting unit 50 tablet terminal (second display device)
3 Communication system 60 Television (display device)
62 Separating part (display control means)
63 Video decoding unit (display control means)
64 Graphic decoding unit 65 Graphic (bidirectional) decoding unit 66 Display unit 67 Control unit 70 Tablet terminal (separate display device)
71 Control unit

Claims (15)

A display device capable of displaying video content and additional content including information related to the video content on a display unit included in the device,
Display control means for displaying the video content on the display unit;
A display device comprising: transfer means for transferring the additional content to a separate display device that displays the additional content. The display device is configured to receive each content including at least the video content and the additional content via a broadcast wave,
Extraction means for extracting, from the broadcast wave, meta information indicating whether or not the content includes reference information referred to for bidirectional communication,
The transfer means uses the meta information to determine whether the content includes the reference information for each content, and transfers only the content determined to include the reference information. The display device according to claim 1. Synchronization control means for synchronously displaying the video content displayed on the display unit and the additional content displayed on the separate display device;
3. The synchronization control unit performs time synchronization with the separate display device by transmitting time information of the display device including the display unit to the separate display device. The display device described in 1. The separate display device is configured to set time information of its own device using time information distributed from a predetermined time server,
Synchronization control means for synchronously displaying the video content displayed on the display unit and the additional content displayed on the separate display device;
The display device according to claim 1, wherein the synchronization control means performs time synchronization with the separate display device using time information distributed from the time server.   When the additional content includes information for displaying the video content, the additional content further includes document conversion means for converting the additional content into new additional content from which the information is deleted. The display device according to any one of claims 1 to 4.   A television receiver comprising the means of the display device according to any one of claims 1 to 5.   6. A display system comprising: the display device according to claim 1; and the separate display device. A receiving device capable of receiving program content including video content and additional content including information related to the video content,
The receiving apparatus comprises a transfer means for transferring the additional content in the program content to an external display device.   When the additional content includes information for displaying the video content, the additional content further includes document conversion means for converting the additional content into new additional content from which the information is deleted. The receiving device according to claim 8. A receiving device capable of receiving program content including video content and additional content including information related to the video content, a first display device that displays video content in the program content, and the additional content can be displayed A second display device, and a display system comprising:
The receiving device includes transfer means for transferring the additional content in the program content to a second display device,
The display system, wherein the second display device includes control means for controlling each device so that the receiving device and the first display device receive the same program content. A display device display method capable of displaying video content and additional content including information related to the video content on a display unit included in the device,
A display control step of displaying the video content on the display unit;
And a transfer step of transferring the additional content to a separate display device that displays the additional content. A display device capable of displaying video content and additional content including information related to the video content on a display unit included in the device,
Display control means for displaying the additional content on the display unit;
A display device comprising: transfer means for transferring the video content to a separate display device that displays the video content.   A program for causing a computer to operate as the display device according to any one of claims 1 to 5, wherein the computer functions as each unit included in the display device.   A program for causing a computer to operate as the receiving device according to claim 8 or 9, wherein the computer functions as the means included in the receiving device.   A computer-readable recording medium on which the program according to claim 13 or 14 is recorded.