JP2008182461A - Video display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display system that allows viewers to share fun with each other. <P>SOLUTION: A television 10 constituting the video display system 1 transmits a packet 300 containing the number of a channel being displayed in a display area 12 to a television 20 which is connected to the Internet 90 and has an IP telephone session established. The television 20 selects the channel based upon the channel number that the packet 300 contains, and displays video in a display area 24 which is part of the display area 22. The video displayed in the display area 12 of the television 10 is the same as the video displayed in the display area 24 of the television 20, so the viewers share fun. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for displaying a video, and more particularly to a technique for displaying a video on a plurality of video display devices connected by a communication line.

  A technique for transmitting video or audio by connecting a television to a communication line is known. For example, Japanese Patent Application Laid-Open No. 2006-39883 (Patent Document 1) is capable of transmitting video and audio from the outside in addition to imaging and audio of the caller, and can also transmit the caller's audio along with the external audio. An apparatus is disclosed.

  Japanese Patent Laid-Open No. 2006-229726 (Patent Document 2) discloses that both users of an IP (Internet Protocol) videophone terminal have a conversation while simultaneously viewing a playback image of specific video content data during a call connection. A technique for reproducing video content data is disclosed.

  Japanese Patent Laying-Open No. 2004-40698 (Patent Document 3) discloses a technique capable of finding a partner to talk to when someone wants to talk to someone about the program while watching TV.

  Japanese Patent Laying-Open No. 2006-108996 (Patent Document 4) discloses a technique for providing communication means more suitable for a viewer who is viewing video content or viewing content.

Further, Japanese Patent Application Laid-Open No. 2003-223407 (Patent Document 5) discloses a technique that enables communication while enjoying content such as images and sounds.
JP 2006-39883 A JP 2006-229726 A JP 2004-40698 A JP 2006-108996 A Japanese Patent Laid-Open No. 2003-223407

  However, according to the technique disclosed in Japanese Patent Application Laid-Open No. 2006-39883, the configuration of the apparatus may be complicated because the voice of the speaker and the voice of the video are switched and transmitted. Also, according to the technology disclosed in Japanese Patent Application Laid-Open No. 2006-229726, video data is transmitted during a call, so traffic increases and the call is blocked, so that the sender and the receiver have the same timing. In some cases, I could not enjoy it.

  According to the technology disclosed in Japanese Patent Application Laid-Open No. 2004-40698, a call can be made when both have already watched the same program, so that each program can be enjoyed when watching different programs. There was also a problem that they could not be shared.

  According to the technology disclosed in Japanese Patent Application Laid-Open No. 2006-108996, since the same content can be viewed only by viewers who belong to a specific group in advance, the enjoyment by any viewer may not be shared. .

  According to the technique disclosed in Japanese Patent Application Laid-Open No. 2003-223407, the transmission of video content is performed by a server, so that setting by each video display device may be complicated.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a video display system that can enhance the interest of a plurality of viewers who view different videos.

  Another object of the present invention is to provide a video display system capable of simplifying the configuration of a video display device.

  In order to solve the above-described problems, a video display system according to an aspect of the present invention includes a first television receiver and a second television receiver connected to the first television receiver via the Internet. Device. The first television receiver includes a first input means for receiving a plurality of television broadcast signals, a first tuner means for selecting at least one of the plurality of television broadcast signals, and a first First display means for displaying video based on the signal selected by the tuner means, first communication means for transmitting or receiving signals according to the Internet protocol, and transmission of information to the second television receiver First television receiver and second television receiver based on a signal from the first storage means for storing first control data defining permission and prohibition of the first communication means, and first communication means A first detecting means for detecting that a call session is established between the first control means and the first control data stipulating permission of transmission; During that, and a transmission control means for transmitting channel information that is identified by the signal selected by the first tuner unit, to the second television receiver via the first communication means. The second television receiver includes a second input means for receiving a plurality of television broadcast signals, a second display means for displaying a video, and a second transmitter for transmitting or receiving signals according to the Internet protocol. Communication means, second storage means for storing second control data defining permission and prohibition of video display based on information received from the first television receiver, and first television receiver A plurality of television broadcasts when the second control data prescribes permission of display based on the detection of the reception of the channel information based on the detection of the reception of the channel information; Second tuner means for selecting a signal specified by channel information from the signal, and second display means for displaying an image based on the signal selected by the second tuner means And a display control means for displaying.

  A video display system according to another aspect of the present invention includes a first television receiver and a second television receiver connected to the first television receiver via a communication line. The first television receiver includes a first acquisition unit that acquires a signal for displaying a video, a first display unit that displays a video based on the signal, and transmission or reception of a signal according to an Internet protocol. And first control for transmitting video display information for displaying video on the second television receiver to the second television receiver via the first communication means. Means. The second television receiver includes a second communication unit that transmits or receives a signal according to the Internet protocol, a second acquisition unit that acquires a signal for displaying a video, and a second that displays a video. Display means, and second control means for causing the second display means to display a video based on the video display information received from the first television receiver based on the signal acquired by the second acquisition means. Is provided.

  Preferably, the first acquisition unit includes a first input unit that receives a plurality of television broadcast signals and a first tuner unit that selects at least one of the plurality of television broadcast signals. The first control means transmits channel information specified by the signal selected by the first tuner means to the second television receiver. The second acquisition means includes second input means for receiving input of a plurality of television broadcast signals, and second tuner means for selecting at least one signal among the plurality of television broadcast signals. The second control means causes the second tuner means to select the channel information received from the first television receiver, and displays the video based on the channel information selected by the selection control means on the second display. Display control means for displaying on the means.

  Preferably, the first acquisition unit includes a first video signal input unit that receives an input of a video signal from the outside of the first television receiver. The first control means includes an encoder for encoding the video signal, and a generation means for generating packet data to be transmitted to the second television receiver based on the data generated by the encoder. Including. The second control means includes extraction means for extracting packet data from information transmitted from the first television receiver, and a decoder for decoding a video signal from the packet data. The second display means displays a video based on the video signal.

  Preferably, the first television receiving device further includes first storage means for storing first control data defining permission and prohibition of transmission of information to the second television receiving device. When the first control data defines permission of transmission, the first control means transmits the video display information to the second television receiver.

  Preferably, the second television receiving device includes second storage means for storing second control data for defining permission and prohibition of video display based on information received from the first television receiving device. Further prepare. When the second control data defines display permission, the second control unit causes the second display unit to display a video based on the video display information.

  Preferably, the second television receiving device is based on the video display information and confirmation means for confirming whether the video based on the video display information transmitted from the first television receiving device can be displayed. The apparatus further includes a generating unit that generates a notification signal indicating that the video cannot be displayed when it is confirmed that the video cannot be displayed, and a notification unit that transmits the notification signal to the first television receiver. The first television receiving device further includes signal transmitting means for transmitting the video signal acquired by the first acquiring means to the second television receiving device based on reception of the notification signal. In the second television receiver, the second display means displays a video based on the video signal.

  Preferably, the second control means displays a video based on the video display information received from the first television receiver in a part of the display area of the second display means.

  Preferably, the video display system further includes a remote control terminal for controlling the first television receiver. The remote control terminal is a telephone call according to the Internet protocol via an operation means for accepting an operation on the remote control terminal, a generation means for generating a signal corresponding to the operation, a transmission means for outputting a signal, and a first television receiver. Telephone means for transmitting and receiving signals. The first television receiver further includes control signal receiving means for receiving a signal transmitted from the remote control terminal, and telephone means for communicating the signal with the remote control terminal.

  Preferably, the operation means receives an operation for setting permission or prohibition of transmission of the video display information by the first television receiver. The generation means generates a signal indicating permission or prohibition according to the operation. The first television receiver further includes first storage means for storing first control data that defines permission or prohibition. The first control means transmits the video display information to the second television receiving apparatus when the first control data defines permission of transmission.

  The video display system according to the present invention can enhance the interest of a plurality of viewers viewing different videos.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<First Embodiment>
Initially, with reference to FIG. 1, the technical idea which implement | achieves the video display system 1 which concerns on the 1st Embodiment of this invention is demonstrated. FIG. 1 is a sequence chart showing communication performed between the televisions 10 and 20 constituting the video display system 1. The television 10 and the television 20 are connected via the Internet 90.

  In step S <b> 100, television 10 performs a calling operation for making a phone call according to IP (Internet Protocol) to television 20. In step S <b> 110, television 10 receives a signal indicating that a call for the calling operation is being performed from television 20. In step S <b> 120, television 10 receives a signal indicating that there is a response to the call operation from television 20.

  In step S <b> 130, the television 10 transmits a confirmation signal for the response to the television 20. Further, a telephone session is established between the television 10 and the television 20 in accordance with SIP (Session Initiation Protocol). When this telephone session is established, a voice call is made by each user between the television 10 and the television 20 (step S140).

  In step S <b> 150, television 10 transmits information for identifying the video displayed on itself (hereinafter “video display information”) to television 20. In step S <b> 160, television 10 receives a status signal representing the state of operation of television 20 from television 20.

  In step S170, audio signals and video signals are communicated between the television 10 and the television 20. More specifically, the television 10 transmits data specifying the selected channel to the television 20 as video display information. When the user of the television 10 speaks by operating a remote control terminal (not shown) of the television 10, an audio signal corresponding to the speech is transmitted to the television 20 and an internet call is realized.

  In step S180, the television 10 notifies the television 20 of the end of the IP phone. In step S <b> 190, the television 10 receives confirmation (acceptance) for the end from the television 20.

  With reference to FIG. 2, video display system 1 according to the present embodiment will be further described. FIG. 2 is a diagram showing the configuration of the video display system 1. The video display system 1 includes a SIP management server 60 in addition to the televisions 10 and 20. Connected to the television 10 are a DVD (Digital Versatile Disc) player 50, an HDD (Hard Disk Recorder) recorder, and other video playback devices. Television 10 is controlled by a control signal issued by remote control terminal 30. The television 20 is controlled by a control signal issued by the remote control terminal 40.

  The television 10 displays an image corresponding to the channel selected by the remote control terminal 30 in the display area 12. The television 10 further displays the video of the channel corresponding to the video displayed on the television 20 in the display region 14 shown in a part of the display region 12. The television 10 transmits a packet 300 including video display information to the television 20. The packet 300 is received by the television 20 and video display information is extracted from the packet 300. The television 20 displays the video corresponding to the channel (one channel) selected on the television 10 in the display area 24 based on the video display information. The television 20 displays a video corresponding to the channel selected by the remote control terminal 40 in the video display area 22.

  The SIP management server 60 manages IP phones that comply with SIP. The SIP management server 60 is realized by, for example, a computer system having a storage device that stores data and a processor that executes instructions.

  The storage device of the SIP management server 60 stores data for realizing the IP telephone by the television 10 and the television 20. More specifically, data (TV-ID) for identifying each television is stored in the memory area 62. The IP address assigned to each television is stored in the memory area 64. The IP telephone number of each television is stored in the memory area 66. The processor of the SIP management server 60 establishes a communication session according to SIP with each terminal device based on the data and program stored in the storage device. When the session is established, each terminal device can use an IP phone. The SIP management server 60 is realized by a computer system having a known configuration. Therefore, the description thereof will not be repeated here.

  With reference to FIG. 3, data communicated between the television 10 and the television 20 will be described. FIG. 3 is a diagram conceptually showing the configuration of packet 300. The packet 300 includes a header part 310, a user data part 320, and an FCS (Frame Check Sequence) 330. The header portion 310 includes a destination address and a transmission source address. The destination address is the IP address (123.456. **. 2) of the television 20. The transmission source address is the IP address (123.456. **. 1) of the television 10 that transmits the packet 300.

  User data portion 320 includes a code indicating that video display information is included, a channel number selected on television 10, and a code for requesting the receiver of packet 300 to display the channel. The FCS 330 includes data for correcting data errors in the packet 300.

  A packet 300 shown in FIG. 3 is transmitted from the television 10 to the television 20. Conversely, the packet transmitted from the television 20 to the television 10 is also realized by the same configuration as the configuration of the packet 300 shown in FIG.

  With reference to FIG. 4, the function which implement | achieves the video display system 1 is demonstrated. FIG. 4 is a block diagram showing a configuration of functions realized by television 10 and television 20.

  The television 10 includes a first control unit 410, a first acquisition unit 420, a first operation unit 422, a first storage unit 424, a first display unit 426, and a first communication unit 428. With. The first control unit 410 includes a SIP communication management unit 412. The first acquisition unit 420 acquires a signal for displaying an image on the first display unit 426. In one aspect, the first acquisition unit 420 is implemented as an input unit that receives input of a plurality of television broadcast signals and a tuner unit that selects at least one of these television broadcast signals. In another aspect, the first acquisition unit 420 is realized as a video signal input unit that receives a video signal input from the outside of the television 10. The television broadcast signal includes terrestrial broadcast, BS (Broadcast Satellite) broadcast, CS (Commercial Satellite) broadcast, cable television broadcast, and Internet television broadcast.

  The first operation unit 422 receives an operation command input to the television 10. In one aspect, the first operation unit 422 is realized as an operation button provided on the front surface of a housing (not shown) of the television 10. The first operation unit 422 is realized as a receiving unit that receives a control signal transmitted from the remote control terminal 30 that controls the operation of the television 10.

  The first control unit 410 realizes video display on the first display unit 426 based on a command given to the television 10 and a video signal acquired by the television 10. First control unit 410 implements communication with television 20 based on data and programs stored in first storage unit 424 and a command given to first operation unit 422. . More specifically, the SIP communication management unit 412 communicates with the television 20 via the first communication unit 428 based on a command for establishing a telephone session with the television 20. The SIP communication management unit 412 confirms the establishment of a telephone session between the television 10 and the television 20 and transmits a signal according to a command given to the first operation unit 422 to the television 20.

  In one aspect, the first control unit 410 transmits to the television 20 video display information for displaying the video displayed on the first display unit 426 on the television 20. In another aspect, first control unit 410 transmits channel information representing the channel selected by the tuner unit to television 20.

  In another aspect, the first control unit 410 compresses and encodes the signal based on the video signal given to the first acquisition unit 420, and transmits the data generated by the encoding to the television 20. .

  In another aspect, the first storage unit 424 stores first control data that defines transmission of information from the television 10 to the television 20. The first control data defines, for example, either permission or prohibition of transmission of the video display information. When the first control data permits transmission of video display information, the first control unit 410 transmits the video display information to the television 20.

  In still another aspect, the first control unit 410 transmits the video signal acquired by the first acquisition unit 420 to the television 20 based on the information transmitted from the television 20. For example, when the television 20 cannot display a video based on a display instruction from the television 10, the television 10 transmits data corresponding to the video displayed on the first display unit 426 to the television 20. In this case, the television 20 displays a video based on the data.

  The first communication unit 428 transmits or receives signals according to the Internet protocol. When the telephone session is established by the SIP communication management unit 412, the first communication unit 428 transmits an audio signal from the television 10 to the television 20 while the session is formed. Conversely, the first communication unit 428 receives the audio signal transmitted from the television 20 and transmits it to the SIP communication management unit 412.

  Referring to FIG. 4 again, the television 20 includes the second acquisition unit 460, the second operation unit 462, the second control unit 450, the second storage unit 464, and the second display unit 466. And a second communication unit 468. Second control unit 450 includes a SIP communication management unit 452.

  The second acquisition unit 460 acquires a signal for displaying a video from the outside of the television 20. The second operation unit 462 receives an instruction input to the television 20. The second control unit 450 controls the operation of the television 20 based on a command given to the television 20 and data and programs stored in the television 20. The second storage unit 464 stores data given in advance to the television 20 and a program for realizing an operation prescribed in advance for the television 20. The second display unit 466 displays an image based on a signal given to the television 20. In one aspect, the second display unit 466 displays a video based on the video signal acquired by the second acquisition unit 460.

  Second communication unit 468 transmits or receives a signal in accordance with the Internet protocol.

  The SIP communication management unit 452 performs processing for enabling a telephone call based on an IP telephone based on a command given to the second operation unit 462 or based on a signal received by the second communication unit 468 Is executed with the television 10. When this process is executed, an IP telephone session is established. SIP is well known to those skilled in the art. Therefore, a detailed description will not be given.

  In one aspect, the second control unit 450 causes the tuner unit to select channel information received from the television 10 and causes the second display unit 466 to display an image based on the selected channel information.

  In another aspect, second control unit 450 decodes the video signal from the packet data, and causes second display unit 466 to display a video based on the video signal obtained by the decoding.

  The second storage unit 464 stores second control data that defines permission and prohibition of video display based on information received from the television 10. When the second control data defines permission for video display, the second control unit 450 causes the second display unit 466 to display a video based on the video display information.

  In yet another aspect, second control unit 450 confirms whether or not video based on video display information transmitted from television 10 can be displayed. For example, the second control unit 450 refers to data defining the hardware configuration of the television 20 and determines whether video display based on the video display information is possible. When the second control unit 450 confirms that the video based on the video display information cannot be displayed, the second control unit 450 generates a signal indicating that fact and transmits the signal to the television 10 via the second communication unit 468.

  In this case, when the television 10 receives the signal, the television 10 compresses and encodes the video signal acquired by the first acquisition unit 420 and transmits the data obtained by the encoding to the television 20.

  When the television 20 receives the data, the television 20 decodes the data and displays a video based on the video signal obtained by the decoding on the second display unit 466.

  In still another aspect, the second control unit 450 displays a video based on the video display information received from the television 10 in a partial area of the display area in the second display unit 466. For example, when the second acquisition unit 460 is realized as two tuners, the second control unit 450 displays an image based on the signal acquired by the first tuner of the second display unit 466. Display in the whole area. Furthermore, the second control unit 450 generates data for displaying a signal from a channel based on the video display information sent from the television 10 on a part of the display area of the second display unit 466 by thinning, for example. The generated data is displayed on the second display unit 466. In this case, the video displayed on the television 10 is displayed in a part of the display area of the television 20 (display area 24 in FIG. 2).

  Next, a specific configuration of the television 10 will be described with reference to FIG. FIG. 5 is a block diagram illustrating a hardware configuration of the television 10. The television 10 includes an external input unit 504, two tuners 514a and 514b, a switching circuit 516, a light receiving unit 506, an operation unit 508, a CPU 510, an antenna 560, a wireless communication circuit 562, and a signal processing circuit 520. A display driver 528, a display 530, amplifiers 536a and 536b, speakers 540a and 540b, and a communication I / F (Interface) 570. CPU 510 includes memory 512. The signal processing circuit 520 includes a separation circuit 522 and an OSD (On Screen Display) circuit 524. An antenna 502 is connected to the tuners 514a and 514b.

  Broadcast signals received by the antenna 502 are transmitted to the tuners 514a and 514b. The tuners 514a and 514b select a designated channel based on a control signal output from the CPU 510.

  The external input unit 504 receives an input of a video / audio signal from the outside of the television 10. For example, the external input unit 504 accepts an input of an audio / video signal output from a video tape recorder (VTR), a DVD player, or other video playback device. The video / audio signal is transmitted from the external input unit 504 to the switching circuit 516. The external input unit 504 may receive a video signal input and an audio signal input separately, or may receive a connection of a cable that collectively transmits these signals.

  Switching circuit 516 selectively outputs either a signal output from at least one of tuners 514a and 514b or a signal sent from external input unit 504 based on a switching command output from CPU 510. The output signal is input to the signal processing circuit 520.

  The memory 552 is realized as a flash memory, for example. The memory 552 includes data (for example, an IP address assigned to the television 10 (memory area 64 in FIG. 2)) for realizing the IP telephone by the television 10 and an IP telephone number assigned to the television 10 (memory area 66). And store. The separation circuit 522 separates the video signal and the audio signal based on a command output from the CPU 510. The video signal output from the separation circuit 522 is input to the OSD circuit 524. The audio signal output from the separation circuit 522 is input to the amplifiers 536a and 536b.

  The OSD circuit 524 generates a signal for displaying an image on the display 530 based on a command output from the CPU 510. This image includes, for example, the channel number, the display of the channel selected on the other television 20, the registered user of the television 20, and other character information. The character information includes a display indicating the volume level and a display indicating the operation of the television 10. The display indicating the operation includes volume up / down, contrast change, and the like.

  The OSD circuit 524 further generates a signal for displaying two channels of video on the display 530. For example, the OSD circuit 524 generates a signal for displaying an image based on a channel selected by the user of the television 10 on the entire display area, and further, an image of the channel selected by the user of the television 20. An image is generated so that a signal for displaying is displayed on a part of the display area. More specifically, the OSD circuit 524 combines the image signals of the two channels output from the separation circuit 522, and outputs a signal generated by the combination to the driver 528. The driver 528 controls display of video on the display 530 based on the signal.

  The amplifiers 536a and 536b amplify each audio signal output from the separation circuit 522 based on a command output from the CPU 510, and transmit the signals obtained by the amplification to the speakers 540a and 540b. Speakers 540a and 540b output sound based on the signals. Note that the number of speakers included in the television 10 is not limited to two, and may be one (monaural output).

  Antenna 560 transmits and receives radio signals to and from remote control terminal 30. More specifically, when the remote control terminal 30 functions as an IP telephone receiver, the remote control terminal 30 transmits a signal corresponding to the voice uttered by the user as a radio signal. This radio signal conforms to a call format used by, for example, an existing cordless telephone. The signal is received by antenna 560 and sent to wireless communication circuit 562. The wireless communication circuit 562 converts the signal into digital data and sends it to the CPU 510. CPU 510 transmits the data to Internet 90 and realizes a call with television 20.

  Further, the wireless communication circuit 562 converts data output from the CPU 510 into an analog signal. This data corresponds to the voice of the IP phone received by the television 10 from the television 20. This sound corresponds to what the user of the television 20 speaks to the remote control terminal 40. The antenna 560 transmits the signal output from the wireless communication circuit 562 as a wireless signal. When the remote control terminal 30 is within a range where radio waves transmitted from the television 10 can be received, the user of the remote control terminal 30 can listen to sound based on the signal. In this way, an IP phone is realized.

  Next, the data structure of the television 10 will be described with reference to FIG. FIG. 6 is a diagram conceptually showing one mode of data storage in memory 552. Memory 552 includes a plurality of memory areas for storing data. Data defining permission or prohibition of data transmission from the television 10 to the television 20 is stored in the memory area 610. More specifically, data that permits or prohibits transmission of information for displaying video displayed on the display 530 of the television 10 (for example, a channel number that identifies the channel selected by the tuner 514a) is stored in the memory. Stored in area 610. In the example shown in FIG. 6, transmission of video display information is set to be possible at the present time. This setting can be changed by the user of the television 10.

  The attribute information of other televisions registered for the television 10 to make an IP phone call is stored in the memory areas 620 and 630. More specifically, data for specifying the other party on the television 10 is stored in the memory area 620. The IP telephone number assigned to each television is stored in the memory area 630. When a user of the remote control terminal 30 operates the remote control terminal 30 to give a call instruction by IP telephone, the instruction is input to the television 10. The television 10 refers to the IP telephone number (memory area 630) stored in the memory 552, and the IP telephone number included in the command given by the remote control terminal 30 matches the IP telephone number registered in the television 10 Confirm whether or not to do. If these IP telephone numbers match, CPU 510 attempts to establish a session by IP telephone with television 20 via communication I / F 570. When the IP telephone session is established, the television 10 and the television 20 can perform voice communication.

  Next, a specific configuration of the television 20 will be described with reference to FIG. FIG. 7 is a block diagram illustrating a hardware configuration of the television 20. The television 20 includes an external input unit 704, a light receiving unit 706, an operation unit 708, a CPU 710, two tuners 714a and 714b, a switching circuit 716, a signal processing circuit 720, a display driver 728, and a display 730. , Amplifiers 736a and 736b, speakers 740a and 740b, a memory 752, an antenna 760, a wireless communication circuit 762, and a communication I / F 770. The signal processing circuit 720 includes a separation circuit 722 and an OSD circuit 724. The CPU 710 includes a memory 712. The tuners 714a and 714b are connected to an antenna 702 that receives a television broadcast signal.

  The hardware configuration of the television 20 shown in FIG. 7 is the same as the hardware configuration of the television 10 shown in FIG. Their operations are the same except for the points described later. Therefore, description of the same operation will not be repeated.

  Next, the data structure of the television 20 will be described with reference to FIG. FIG. 8 is a diagram conceptually showing one mode of data storage in memory 752. The memory 752 includes a plurality of memory areas for storing data provided for defining the operation of the television 20.

  Data for controlling the display of video based on information given to the television 20 is stored in the memory area 810. More specifically, data defining whether to display a video based on the video display information is stored in the memory area 810. In the example shown in FIG. 8, this display is currently set to “possible”. This setting can be changed by the user of the television 20 by giving a command to the operation unit 708 or the light receiving unit 706.

  Identification data for identifying a call partner with whom the television 20 makes an IP phone call is stored in a memory area 820. The IP telephone number of each call partner is stored in the memory area 830.

  When a user of the television 20 operates the remote control terminal 40 to make an IP phone call, a signal corresponding to the operation is input to the television 20. The CPU 710 refers to the memory 752 based on the input of the signal and confirms whether or not the telephone number included in the command is registered in the memory area 830. If the telephone number is registered in memory area 832, CPU 710 makes a call via communication I / F 770 based on the IP telephone number (memory area 830).

  On the other hand, when the television 20 receives an incoming IP phone call via the communication I / F 770, the phone number included in the incoming call signal is taken out by the CPU 710 and whether it matches the IP phone number registered in the memory 752 or not. Is confirmed. When these telephone numbers match, CPU 710 transmits a signal including identification data (memory area 820) corresponding to the IP telephone number from antenna 760 via wireless communication circuit 762. When the remote control terminal 40 receives the signal, the sender of the signal (that is, the sender of the IP phone) is displayed on the display (not shown) of the remote control terminal 40.

  Next, remote control terminal 30 according to the present embodiment will be described with reference to FIG. FIG. 9 is a block diagram showing a configuration of functions realized by remote control terminal 30. The remote control terminal 30 has a function of controlling the television 10 and an IP telephone function.

  The remote control terminal 30 includes an operation unit 902, a generation unit 904, a transmission unit 906, a reception unit 908, a conversion unit 910, a display unit 912, an antenna 914, a wireless reception unit 916, a demodulation unit 918, A modulation unit 920, a wireless transmission unit 922, a storage unit 930, and an audio output unit 924 are provided. The operation unit 902 receives an input of an operation on the remote control terminal 30. The operation unit 902 sends a signal corresponding to the operation to the generation unit 904.

  The generation unit 904 generates a signal for controlling the operation of the television 10 based on the signal output from the operation unit 902, and sends the generated signal to the transmission unit 906. Transmitter 906 transmits the control signal. For example, the transmitting unit 906 transmits the control signal as an infrared signal.

  The receiving unit 908 receives input of speech uttered by the user of the remote control terminal 30. The reception unit 908 sends the audio signal to the conversion unit 910. The converter 910 processes the signal output from the receiver 908 and converts it into a signal format for wireless transmission.

  The display unit 912 displays an image corresponding to the signal output from the generation unit 904 or an image corresponding to the data output from the conversion unit 910. The displayed image includes a number for selecting a channel on the TV 10, a telephone number input for making an IP telephone call, and an IP telephone of the TV 20 when an incoming call is received from the other party (for example, the TV 20). Contains a number.

  The antenna 914 receives a signal transmitted from the television 10. More specifically, the antenna 914 receives a call signal generated based on an incoming call from the television 20. After the IP telephone session is established, the antenna 914 transmits the voice uttered to the receiver 908 by the user of the remote control terminal 30 in addition to the signal for the IP telephone sent from the television 20. A corresponding signal is transmitted.

  The wireless reception unit 916 receives an input of a signal received by the antenna 914. The wireless reception unit 916 sends the signal to the demodulation unit 918. Demodulation section 918 demodulates the signal and sends the signal obtained by the demodulation to conversion section 910.

  Modulation section 920 modulates the signal output from conversion section 910, generates a signal for wireless transmission, and sends the generated signal to wireless transmission section 922. The wireless transmission unit 922 transmits the signal toward the antenna 914. The antenna 914 transmits the signal. The transmitted signal is received by the antenna 560 of the television 10.

  In another aspect, when remote control terminal 30 receives a signal for an IP phone transmitted from television 10, conversion unit 910 converts the telephone number of the caller (TV 20) included in the signal. Acquire and send the number to the display unit 912. Display unit 912 displays the other party's telephone number based on the signal.

  Also, the conversion unit 910 extracts an audio signal from the signal demodulated by the demodulation unit 918 and sends the extracted audio signal to the audio output unit 924. The audio output unit 924 outputs audio based on the audio signal. For example, when the remote control terminal 30 receives an incoming call for an IP phone, the voice output unit 924 outputs a ringing tone for the phone. Thereafter, when the user of the remote control terminal 30 performs an operation of receiving the receiver, the voice output unit 924 outputs the caller's voice.

  The remote control terminal 30 will be further described with reference to FIG. FIG. 10 is a diagram showing the appearance of remote control terminal 30. The remote control terminal 30 includes an operation unit 1002, a light emitting unit 1060, and a display 1020. Specifically, the operation unit 1002 is realized by a button, a touch panel, a dial, or the like. The operation unit 1002 includes cursor buttons 1004a, 1004b, 1004c, and 1004d that define the vertical and horizontal directions of the cursor displayed on the display 1020, an enter button 1014, an up / down button 1008, and a numeric button 1006. The enter button 1014 receives an operation for confirming the content of input by the user of the remote control terminal 30. Up / down button 1008 accepts an operation for increasing or decreasing the value included in the output control signal. A number button 1006 accepts input of each number. The up / down button 1008 includes a first up button 1018a, a first down button 1018b, a second up button 1028a, and a second down button 1028b. The first up button 1018a and the first down button 1018b accept, for example, a command for selecting a channel. The second up button 1028a and the second down button 1028b accept a command for increasing or decreasing the volume.

  Remote control terminal 30 includes a button 1082 that accepts an instruction to receive or send an IP phone, and a button 1080 that accepts an instruction to end an IP phone.

  When the user of the remote control terminal 30 presses the button 1082, the remote control terminal 30 waits for a calling operation in the same manner as a normal telephone. When the user inputs a number to the number button 1006, the calling operation is performed by the IP telephone number specified by the number, and the television 10 is called. On the other hand, when the user of remote control terminal 30 presses button 1080, the IP telephone using remote control terminal 30 ends in response to the press.

  Remote control terminal 30 further includes a speaker 1070 and a microphone 1080. The speaker 1070 notifies an incoming IP phone call to the remote control terminal 30. Further, when a telephone session is established, a voice based on a voice signal sent from the other party is output. The microphone 1080 receives an utterance to the remote control terminal 30 and sends a signal corresponding to the utterance as a voice signal to a processor (not shown) that defines the operation of the remote control terminal 30. The processor generates a radio signal based on the signal and transmits the signal via the antenna 914. Thereby, the telephone call by the IP telephone is realized.

  The data structure of the remote control terminal 30 will be described with reference to FIG. FIG. 11 is a diagram conceptually showing one mode of data storage in storage unit 930. Storage unit 930 is realized as a flash memory, for example. Other non-volatile memories may be used. Storage unit 930 includes a plurality of memory areas for storing data for defining the operation of remote control terminal 30.

  Data for identifying the other party registered as the calling party of the television 10 is stored in the memory area 1110. The telephone number assigned to the other party is stored in the memory area 1120. A program for executing an IP phone call by remote control terminal 30 is stored in memory area 1130. This program is executed by a processor included in the remote control terminal 30 to realize processing to be described later.

  A program for generating a signal for controlling the operation of the television 10 is stored in the memory area 1140. When the remote control terminal 30 functions as a normal terminal that controls the operation of the television 10, a control signal is generated according to this program and transmitted from the remote control terminal 30. Note that the operation of the remote control terminal 30 is not limited to that realized by the cooperation of the above-described program and processor, that is, realized by a combination of software and hardware. For example, the remote control terminal 30 may be realized by a combination of hardware such as a combination of circuits that output signals corresponding to operations on the operation unit 902.

  Next, a control structure of remote control terminal 30 according to the present embodiment will be described with reference to FIG. FIG. 12 is a flowchart showing a part of a series of operations executed by control unit 950 included in remote control terminal 30.

  In step S1210, control unit 950 detects the input of the IP telephone number and the calling command based on the button operation on operation unit 902. In step S1220, control unit 950 generates, as generation unit 904, a control signal including an IP telephone number and a call instruction. In step S1230, transmission unit 906 transmits the control signal as an infrared signal.

  In step S 1240, control unit 950 receives a signal indicating that an IP telephone session has been established from television 10 based on the signal received by antenna 914. In step S1250, control unit 950 detects that a command for transmitting video display information has been input based on an operation on operation unit 902. In step S1260, control unit 950 generates a control signal including video display information. More specifically, the control unit 950 refers to the storage unit 930, reads data specifying the channel selected last, and generates a control signal using the data as video display information. In step S1270, control unit 950 transmits the control signal as an infrared signal.

  Next, the control structure of the television 10 will be described with reference to FIG. FIG. 13 is a flowchart showing a part of a series of operations executed by CPU 510 of television 10.

  In step S 1310, CPU 510 detects that a control signal has been received from remote control terminal 30 based on the signal output from light receiving unit 506. In step S1312, CPU 510 obtains an IP telephone call instruction and an IP telephone number of television 20 from the control signal. In step S1314, CPU 510 performs a calling operation according to the IP telephone number acquired in response to the command. More specifically, CPU 510 generates an IP telephone session start request in accordance with SIP, and transmits the request (packet data) to Internet 90 via communication I / F 570. When the SIP management server 60 receives the packet, the SIP management server 60 extracts the IP telephone number of the television 20 included in the packet, and transmits an IP telephone start request to the television 20 based on the telephone number.

  In step S 1316, CPU 510 detects that an IP telephone session has been established with television 20. More specifically, when the television 20 transmits a signal indicating acceptance in response to a request from the SIP management server 60, the signal is transmitted to the television 10 through a session based on the signal. When CPU 510 receives the signal, CPU 510 can know that a session has been formed between television 10 and television 20.

  In step S1318, CPU 510 converts the signal output from wireless communication circuit 562 (that is, the audio signal from remote control terminal 30) into a packet, and makes a call with television 20 using the packet. When the television 10 receives a packet from the television 20, an audio signal based on the packet is transmitted from the wireless communication circuit 562 through the antenna 560. The user of the remote control terminal 30 can talk with the user of the television 20 by listening to the sound based on the signal.

  In step S1320, CPU 510 determines whether or not a control signal requesting transmission of video display information from remote control terminal 30 has been received. This determination is performed based on, for example, whether a control signal output from operation unit 508 includes a code representing a transmission request for the video display information. When CPU 510 determines that the control signal has been received (YES in step S1320), CPU 510 switches control to step S1330. If not (NO in step S1320), CPU 510 switches control to step S1340.

  In step S1330, CPU 510 determines whether or not transmission of video display information is permitted based on data (memory area 610) stored in memory 552. If transmission of video display information is permitted (YES in step S1330), CPU 510 switches control to step S1332. If not (NO in step S1330), CPU 510 switches control to step S1340.

  In step S1332, CPU 510 obtains the channel number selected by tuner 514a and the IP address of television 20. More specifically, CPU 510 reads channel number corresponding to the channel selection command last given to tuner 514 a from memory 512. Further, the CPU 510 reads the IP address of the television 20 with reference to the memory 552.

  In step S1334, CPU 510 generates packet data for requesting display of video on television 20 based on the channel number and IP address (FIG. 3).

  In step S1336, CPU 510 transmits packet 300 to television 20 via communication I / F 570.

  In step S 1340, CPU 510 determines whether or not a signal indicating the end of the IP telephone is received from remote control terminal 30 based on the signal output from light receiving unit 506. More specifically, CPU 510 extracts a code that defines the operation of television 10 from the control signal, and checks whether or not the code defines the termination of the IP phone. When CPU 510 determines that the signal has been received (YES in step S1340), CPU 510 switches control to step S1350. If not (NO in step S1340), the control returns to step S1318.

  In step S 1350, CPU 510 ends the IP telephone session established with television 20 by transmitting a termination command to television 20 via communication I / F 570.

  Next, the control structure of the television 20 will be described with reference to FIG. FIG. 14 is a flowchart showing a part of a series of operations executed by CPU 710 included in television 20.

  In step S1410, CPU 710 detects that IP phone call is being performed by television 10 based on the data received from communication I / F 770. In step S1412, CPU 710 forms an IP telephone session with television 10 based on a signal received by light receiving unit 706 (a control signal transmitted from remote control terminal 40). More specifically, when the user of the television 20 operates the remote control terminal 40 in response to an IP telephone call and responds to the call, a signal representing the response is sent to the SIP management server 60. The SIP management server 60 generates a signal indicating that the television 20 has accepted the call by the television 10 based on the signal, and transmits the generated signal to the television 10. Thereafter, when an IP telephone session is established between the television 10 and the television 20, a telephone call can be made.

  In step S1414, CPU 710 receives a packet having audio data via communication I / F 770. In step S 1416, CPU 710 converts the packet into an audio signal and sends it to radio communication circuit 762. In step S1418, wireless communication circuit 762 wirelessly transmits the signal via antenna 760. When the remote control terminal 40 is within a range in which a signal transmitted from the television 20 can be received, communication between the remote control terminal 40 and the television 20 is realized.

  In step S 1420, CPU 710 detects that packet 300 having video display information has been received based on the data output from communication I / F 770. In step S1422, CPU 710 obtains user data from packet 300. More specifically, the CPU 710 obtains a code indicating that video display information is included, a channel number selected on the television 10, and a code for requesting video display based on the channel. And temporarily stored in a memory area secured in the memory 712.

  In step S1430, CPU 710 determines whether or not video display based on video display information is permitted based on these data stored in memory 712. More specifically, the CPU 710 refers to the memory 752 (memory area 810) and determines whether the display is permitted. When CPU 710 determines that video display based on video display information is permitted (YES in step S1430), CPU 710 switches control to step S1440. If not (NO in step S1430), the process ends.

  In step S1440, CPU 710 sends to tuner 714b a command for selecting a channel specified by the channel number included in the acquired user data. The tuner 714b performs a channel selection operation according to the command. Thus, an image based on a signal from the channel selected by the tuner 714b can be displayed.

  In step S1442, CPU 710 generates an instruction for generating a signal for displaying a video based on the signal from the channel in a part of the display area of display 730 (for example, display area 24 in FIG. 2). 724. The OSD circuit 724 generates the signal using the video signal output from the separation circuit 722 according to the command. The generated signal is sent to the display driver 728.

  In step S1444, CPU 710 detects the end of the IP telephone call based on data transmitted from communication I / F 770 or based on data output from wireless communication circuit 762. In step S1450, CPU 710 determines whether or not to end the display of the video displayed in a part of the display area of display 730 (that is, the video displayed on television 10). This determination is made, for example, based on data included in the video display information and indicating whether or not the display is continued after the IP telephone session is ended. When CPU 710 determines to end the display (YES in step S1450), CPU 710 switches control to step S1460. If not (NO in step S1450), CPU 710 ends the control.

  In step S1460, CPU 710 gives an instruction to end selection of the channel to tuner 714b. Tuner 714b ends the channel selection operation in response to the command. As a result, only the video based on the signal output from the tuner 714a, that is, the video based on the signal from the channel selected by the user of the television 20 is displayed.

  As described above, according to the communication system according to the first embodiment of the present invention, the televisions 10 and 20 having the IP telephone function form an IP telephone session according to the operation of each user. When a viewer of the television 10 performs an operation of transmitting data specifying the currently selected channel to the television 20 as video display information, a packet 300 including a channel number is transmitted to the television 20.

  The television 20 extracts the channel number from the packet 300, and selects the channel using the sub tuner 714b. The television 20 displays a video based on the signal sent from the sub-tuner 714b in a display area 24 that is a part of the display area 22 of the television 20. The video displayed in the display area 24 is the same as the video displayed in the display area 12 of the television 10. Thereby, since the user of the television 10 and the user of the television 20 can view the same program, the topic can be shared, and the enjoyment by the television broadcast program is increased.

  In the present embodiment, a configuration in which two tuners are included in a television is used as an example, but three or more tuners may be used.

<Second Embodiment>
Hereinafter, a second embodiment of the present invention will be described. The video display system according to the present embodiment is different from the first embodiment described above in that it can be realized even when any video display device does not have a function of receiving a television broadcast signal.

  A video display system according to the present embodiment will be described with reference to FIG. FIG. 15 is a block diagram showing a configuration of functions realized by video display devices 1510 and 1550. The video display device 1510 includes a first acquisition unit 420, a first operation unit 422, a first storage unit 424, a first display unit 426, and a first communication unit 428, 1 control unit 1520 is provided. First control unit 1520 includes an encoding unit 1522, a packet generation unit 1524, and a SIP communication management unit 412.

  The encoding unit 1522 compresses and encodes the video signal acquired by the first acquisition unit 420. Data generated by compression encoding is input to the packet generation unit 1524. The packet generator 1524 generates packet data for communication via the Internet 90 based on the data. The generated data is sent from the first communication unit 428 to the video display device 1550 via the SIP communication management unit 412.

  Referring to FIG. 15 again, the video display device 1550 includes the second acquisition unit 460, the second operation unit 462, the second storage unit 464, the second display unit 466, and the second communication. In addition to the unit 468, a second control unit 1560 is provided. Second control unit 1560 includes confirmation unit 1562, decryption unit 1564, and SIP communication management unit 452.

  Based on the data received by the second communication unit 468, the confirmation unit 1562 confirms whether video display (for example, channel selection) based on the signal included in the video display information is possible. More specifically, the confirmation unit 1562 refers to the second storage unit 464 and determines whether or not video display based on information provided to the video display device 1550 is permitted. If such display is not permitted, confirmation unit 1562 generates data indicating that fact and sends the data to SIP communication management unit 452. Alternatively, in the case where the video display device 1550 does not have a plurality of tuners for receiving a television broadcast signal, the confirmation unit 1562 uses a video based on information given to the video display device 1550 from the outside based on the configuration. Is determined not to be displayed. Confirmation unit 1562 generates data representing the determination result, and transmits the generated data to SIP communication management unit 452.

  The SIP communication management unit 452 sends the data to the video display device 1510. In this case, when the video display device 1510 transmits the above-mentioned compression-encoded video signal to the video display device 1550, the data is sent from the SIP communication management unit 452 to the decoding unit 1564. The decoding unit 1564 decodes the video signal from the packet and sends it to the second display unit 466. Second display unit 466 displays an image based on the signal.

  Next, data sent from the video display device 1510 to the video display device 1550 will be described with reference to FIG. FIG. 16 conceptually shows the structure of packet 1600. The packet 1600 includes a header portion 1610, a user data portion 1620, and an FCS 1630.

  The header portion 1610 has the same contents as the header portion 310 of the packet 300 shown in FIG. User data portion 1620 includes a code indicating that video display information is included, video data that has been compression-encoded, and a code that requests decoding of the video data. When the video display device 1550 receives the packet 1600 having such a configuration, the decoding unit 1564 decodes the video data included in the user data unit 1620 and restores the original video signal. The second display unit 466 can display an image based on the image signal.

  As described above, according to the video display system according to the second embodiment of the present invention, video display device 1550 that has received video display information upon receiving an incoming IP phone call displays video based on the video display information. When it is confirmed that display is impossible, a signal representing the result of the confirmation is transmitted to the video display device 1510 that transmitted the video display information. The video display device 1510 compresses and encodes video content corresponding to the video display information based on the signal, and transmits the video content to the video display device 1550 as video / audio data. When receiving the video / audio data, the video display device 1550 decodes and displays the video.

  In this way, the user of the video display device 1550 can view the video based on the data sent by the video display device 1510, and can view the same video as the user of the video display device 1510. Become. As a result, both users can share enjoyment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a sequence chart showing communication performed between television 10,20 grade | etc., Which comprises the video display system 1 which concerns on the 1st Embodiment of this invention. 1 is a diagram illustrating a configuration of a video display system 1. FIG. It is a figure which represents notionally the structure of the packet 300 communicated between the television 10 and the television 20. FIG. 2 is a block diagram showing a configuration of functions realized by a television 10 and a television 20 constituting the video display system 1. FIG. 2 is a block diagram illustrating a hardware configuration of a television 10. FIG. 3 is a diagram conceptually showing one mode of data storage in a memory 552 of the television 10. FIG. 2 is a block diagram illustrating a hardware configuration of a television 20. FIG. FIG. 3 is a diagram conceptually showing one aspect of data storage in a memory 752 of the television 20. 3 is a block diagram showing a configuration of functions realized by remote control terminal 30. FIG. 2 is a diagram illustrating an appearance of a remote control terminal 30. FIG. FIG. 11 is a diagram conceptually showing one aspect of data storage in storage unit 930 of remote control terminal 30. It is a flowchart showing a part of a series of operations executed by control unit 950 included in remote control terminal 30. 4 is a flowchart showing a part of a series of operations executed by CPU 510 of television 10. 7 is a flowchart showing a part of a series of operations executed by CPU 710 included in television 20. It is a block diagram showing the structure of the function implement | achieved by the video display apparatuses 1510 and 1550 included in the video display system which concerns on the 2nd Embodiment of this invention. It is a figure which represents notionally the structure of the packet 1600 sent to the video display apparatus 1550 from the video display apparatus 1510.

Explanation of symbols

  1 video display system, 10, 20 TV, 30, 40 remote control terminal, 90 Internet, 50 DVD player, 60 SIP management server, 300 packets, 502, 702, 914 antenna, 528, 728 display driver, 536a, 536b, 736a, 736b Amplifier.

Claims (10)

A first television receiver, and a second television receiver connected to the first television receiver via the Internet,
The first television receiver is:
First input means for receiving a plurality of television broadcast signals;
First tuner means for selecting at least one of the plurality of television broadcast signals;
First display means for displaying an image based on the signal selected by the first tuner means;
First communication means for transmitting or receiving signals according to an Internet protocol;
First storage means for storing first control data defining permission and prohibition of transmission of information to the second television receiver;
First detecting means for detecting that a call session is established between the first television receiving apparatus and the second television receiving apparatus based on a signal from the first communication means. When,
Channel information specified by a signal selected by the first tuner means while the call session is established when the first control data defines permission to transmit, Transmission control means for transmitting to the second television receiver via the first communication means,
The second television receiver is:
A second input means for receiving a plurality of television broadcast signals;
Second display means for displaying video;
A second communication means for transmitting or receiving a signal according to an Internet protocol;
Second storage means for storing second control data defining permission and prohibition of video display based on information received from the first television receiver;
Second detection means for detecting that the channel information has been received from the first television receiver;
Based on detection of reception of the channel information, a signal specified by the channel information is selected from the plurality of television broadcast signals when the second control data defines permission of the display A second tuner means to:
A video display system comprising: display control means for causing the second display means to display a video based on the signal selected by the second tuner means. A first television receiver and a second television receiver connected to the first television receiver via a communication line;
The first television receiver is:
First acquisition means for acquiring a signal for displaying an image;
First display means for displaying an image based on the signal;
First communication means for transmitting or receiving signals according to an Internet protocol;
First display means for transmitting video display information for displaying the video on the second television receiver to the second television receiver via the first communication means;
The second television receiver is:
A second communication means for transmitting or receiving a signal according to an Internet protocol;
Second acquisition means for acquiring a signal for displaying an image;
Second display means for displaying video;
Second control means for causing the second display means to display a video based on the video display information received from the first television receiver based on the signal acquired by the second acquisition means. , Video display system. The first acquisition means includes
First input means for receiving a plurality of television broadcast signals;
First tuner means for selecting at least one signal of the plurality of television broadcast signals,
The first control means transmits channel information specified by the signal selected by the first tuner means to the second television receiver,
The second acquisition means includes
A second input means for receiving a plurality of television broadcast signals;
Second tuner means for selecting at least one signal of the plurality of television broadcast signals,
The second control means includes
Selection control means for causing the second tuner means to select channel information received from the first television receiver;
The video display system according to claim 2, further comprising display control means for causing the second display means to display a video based on the channel information selected by the selection control means. The first acquisition means includes first video signal input means for receiving an input of a video signal from the outside of the first television receiver,
The first control means includes
An encoder for encoding the video signal;
Generating means for generating packet data to be transmitted to the second television receiver based on the data generated by the encoder;
The second control means includes
Extraction means for extracting the packet data from the information transmitted from the first television receiver;
A decoder for decoding the video signal from the packet data,
The video display system according to claim 2, wherein the second display unit displays a video based on the video signal. The first television receiving device further includes first storage means for storing first control data defining permission and prohibition of transmission of information to the second television receiving device,
The said 1st control means transmits the said video display information to a said 2nd television receiver, when the said 1st control data prescribes | regulates the permission of the transmission of Claim 2 Video display system. The second television receiving device further includes second storage means for storing second control data defining permission and prohibition of video display based on information received from the first television receiving device. Prepared,
The said 2nd control means makes the said 2nd display means display the image | video based on the said image | video display information, when the said 2nd control data prescribes | regulates the said display permission. Video display system. The second television receiver is:
Confirmation means for confirming whether or not video based on video display information transmitted from the first television receiver can be displayed;
Generating means for generating a notification signal indicating that the video cannot be displayed when it is confirmed that the video based on the video display information cannot be displayed;
Notification means for transmitting the notification signal to the first television receiver,
The first television receiver further includes a signal transmitter that transmits the video signal acquired by the first acquirer to the second television receiver based on the reception of the notification signal. Prepared,
3. The video display system according to claim 2, wherein in the second television receiver, the second display unit displays a video based on the video signal.   The second control means displays a video based on the video display information received from the first television receiver in a partial area of the display area in the second display means. The video display system described in 1. A remote control terminal for controlling the first television receiver;
The remote control terminal is
Operation means for accepting an operation on the remote control terminal;
Generating means for generating a signal corresponding to the operation;
Transmitting means for outputting the signal;
Telephone means for transmitting and receiving a call signal according to the Internet protocol via the first television receiver;
The first television receiver is:
Control signal receiving means for receiving a signal transmitted by the remote control terminal;
The video display system according to claim 2, further comprising telephone means for communicating a signal with the remote control terminal. The operation means accepts an operation for setting permission or prohibition of transmission of video display information by the first television receiver;
The generation means generates a signal representing the permission or prohibition according to the operation,
The first television receiver further includes first storage means for storing first control data that defines the permission or prohibition,
The said 1st control means transmits the said video display information to a said 2nd television receiver, when the said 1st control data prescribe | regulates the permission of the said transmission. Video display system.

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