JP2005136864A - Television system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a television system, which provides a preference with one of a master television set or a slave television set, and prevents a program being watched to which a preference is provided from being changed together with a channel selection instruction for the television set to which no preference is provided. <P>SOLUTION: The television system consists of: a means for determining whether a second condition that a channel transmitted from a slave television set and a channel of a master television set watched at present are different from each other is satisfied; a means for determining whether, when the second condition is satisfied, a preference is provided to the slave television set based on preference data; and a means for performing, when a preference is provided to the slave television set, a channel change to a channel transmitted from the slave television set, and keeping, when a preference is provided to the master television set, a present state without performing the channel change to the channel transmitted from the slave television set. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a television system in which a program received by a parent television can be viewed on a child television.

  A television system has already been developed, which consists of a parent television (parent TV) having a plurality of tuners and a child television (child TV) capable of wireless communication with the parent TV, and allows a program received by the parent TV to be viewed on the child TV. (For example, see Japanese Patent Application No. 2002-044988).

  In such a television system, when a channel selection instruction is input to the child TV side, the channel selection instruction is transmitted to the parent TV, and the parent TV selects a channel corresponding to the channel selection instruction and the channel. Video / audio data is transmitted to the child TV.

  When viewing a program received by a certain tuner (first tuner) on the parent TV side, a selection for selecting a program received by a different tuner (second tuner) from the child TV side. When a station instruction is sent, the parent TV performs a channel selection operation according to the channel selection instruction to the second tuner, and the video / audio data of the channel according to the channel selection instruction is transmitted to the child TV. Send to. For this reason, the viewing program on the parent TV side is not changed.

  On the other hand, when one program among the programs received by a tuner (first tuner) on the parent TV side is viewed, the same tuner (first tuner) receives from the child TV side. When a channel selection instruction for selecting a different program among the existing programs is sent, the parent TV performs a channel selection operation according to the channel selection instruction to the first tuner, and the channel selection is performed. The video / audio data of the channel corresponding to the instruction is transmitted to the child TV. In this case, in accordance with the channel selection instruction on the child TV side, the viewing program on the parent TV side is also changed to the program on the channel instructed to be selected on the child TV side. May cause inconvenience.

A program received by the same tuner (first tuner) on the parent TV side when one of the programs received by a tuner (first tuner) on the child TV side is viewed The same thing happens when a channel selection instruction for selecting a different program is input. That is, in accordance with the channel selection instruction on the parent TV side, the viewing program on the child TV side is also changed, which may cause trouble for the viewer watching the child TV.
Japanese Patent Application No. 2002-044988

  According to the present invention, priority can be given to either the parent television or the child television, and the viewing program to which the priority is given is given in accordance with the channel selection instruction for the one not given the priority. An object of the present invention is to provide a television system that can be prevented from being changed.

  The invention described in claim 1 includes a parent television and a child television, and the parent television selects one received signal of one channel from one tuner and one received signal received by one tuner, and selects one selected A means for broadcasting the received signal of the channel on the parent television and wirelessly transmitting it to the child television is provided. The child television is provided with means for receiving the reception signal wirelessly transmitted from the parent television and broadcasting it on the child television. In the television system, the child television is provided with child television channel designating means for designating a channel desired to be viewed on the child television side and means for wirelessly transmitting the designated channel to the parent television. Any of the parent TV channel specifying means, the parent TV, and the child TV for specifying the channel that the user wants to view Means for setting priority data indicating whether to give priority to channel designation, storage means for holding the set priority data, and first control processing when a channel is designated by the parent television channel designation means. First control processing means to perform and second processing means to perform second control processing when a channel designated by the subsidiary television channel designation means is sent from the subsidiary television. The processing means determines whether or not the channel designated by the parent television channel designating means and the current viewing channel of the child television are different from each other, satisfying the first condition. If not, it is possible to change the channel to the channel specified by the parent TV channel specifying means. If the first condition is satisfied, means for determining whether the parent TV has priority based on the priority data, and if the parent TV has priority, the parent TV channel designation If the channel is changed to the channel specified by the means and the child TV has priority, the current state is maintained without executing the channel change to the channel specified by the parent TV channel specifying means. And a second control processing unit determines whether or not a channel transmitted from the child television and a current viewing channel of the parent television satisfy a second condition that they are different from each other. Means for changing the channel to the channel sent from the child television, if the second condition is not satisfied, the second condition is satisfied Means for determining whether or not the child television has priority based on the priority data, and if the child television has priority, the channel is sent to the channel sent from the child television. When the change is made and the parent television has priority, a means for maintaining the current state without changing the channel to the channel sent from the child television is provided.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first control processing means satisfies the first condition and if the parent television has priority, the child television has a viewing channel. Means for notifying the child television that the viewing channel is changed in order to display that the child television is changed, and if the first condition is satisfied but the child television has priority, the parent television has a channel. Means for displaying that the change cannot be made, and the second control processing means changes the viewing channel on the parent TV when the second condition is satisfied and the child TV has priority. And, if the second condition is satisfied but the parent TV has priority, the child TV will display a message indicating that the channel cannot be changed. Characterized in that it further comprises means for notifying can not.

  The invention described in claim 3 includes a parent television and a child television, and the parent television selects a reception signal for broadcasting the parent television from a plurality of tuners and reception signals received by the plurality of tuners. In addition to broadcasting, a means for selecting a reception signal for broadcasting a child television and wirelessly transmitting to the child television is provided. The child television receives a reception signal for broadcasting the child television transmitted wirelessly from the parent television. In the television system provided with means for broadcasting on the child television, the child television is provided with child television channel designation means for designating a channel desired to be viewed on the child television side and means for wirelessly transmitting the designated channel to the parent television. The parent TV has a parent TV channel specifying means for specifying a channel to be viewed on the parent TV side, the parent TV and Means for setting priority data indicating which channel designation of the television should be prioritized, storage means for holding the set priority data, and first when a channel is designated by the parent television channel designation means. First control processing means for performing the control processing of the first and second processing means for performing the second control processing when the channel designated by the slave television channel designation means is sent from the slave television, The first control processing means satisfies the first condition that the channel designated by the parent television channel designating means and the current viewing channel of the child television are different channels within the channel received by the same tuner. Means for determining whether or not the first TV channel is specified if the first condition is not satisfied Means for changing the channel to the channel specified by the stage and selecting the received signal obtained by the channel change as the received signal for broadcasting the parent television, based on the priority data if the first condition is satisfied Means for determining whether or not the parent television has priority, and if the parent television has priority, change the channel to the channel designated by the parent television channel designation means, and obtain the result by changing the channel. The received signal is selected as a reception signal for broadcasting the parent television and the child television, and if the child television has priority, the channel change to the channel designated by the parent television channel designation means is executed. The second control processing means is sent from the sub-TV. Means for discriminating whether or not the second condition that the received channel and the current viewing channel of the parent TV are different channels within the channel received by the same tuner, does not satisfy the second condition In this case, the channel is changed to the channel transmitted from the child television, and the reception signal obtained by the channel change is selected as the reception signal for broadcasting the child television, when the second condition is satisfied , Means for determining whether or not the child TV has priority based on the priority data, and if the child TV has priority, change the channel to the channel sent from the child TV and change the channel When the received signal obtained by is selected as the received signal for parent TV broadcasting and child TV broadcasting, and the parent TV has priority Without performing the channel change to the channel sent from the child TV, characterized in that it comprises means to maintain the current state.

  According to a fourth aspect of the present invention, in the third aspect of the invention, the first control processing means satisfies the first condition and the parent television has priority, the child television has a viewing channel. Means for notifying the child television that the viewing channel is changed in order to display that the child television is changed, and if the first condition is satisfied but the child television has priority, the parent television has a channel. Means for displaying that the change cannot be made, and the second control processing means changes the viewing channel on the parent TV when the second condition is satisfied and the child TV has priority. And, if the second condition is satisfied but the parent TV has priority, the child TV will display a message indicating that the channel cannot be changed. Characterized in that it further comprises means for notifying can not.

  According to the present invention, priority can be given to either the parent TV or the child TV, and viewing of the person who is given priority according to the channel selection instruction for the person who is not given priority. The program can be prevented from being changed.

  Embodiments of the present invention will be described below with reference to the drawings.

  The television system includes a parent television (parent TV) and a child television (child TV).

  FIG. 1 shows the configuration of the parent TV.

  In this example, the parent TV has three types of tuners: a digital BS / CS tuner 103, a digital terrestrial tuner 104, and an analog terrestrial tuner 105.

  A BS / CS receiving antenna 101 is connected to the digital BS / CS tuner 103. A terrestrial receiving antenna 102 is connected to the digital terrestrial tuner 104 and the analog terrestrial tuner 105.

  A digital BS / CS broadcast signal received by the antenna 101 is sent to the digital BS / CS tuner 103. The TS signal output from the digital BS / CS tuner 103 is input to the matrix switch 110.

  A digital terrestrial broadcast signal received by the antenna 102 is distributed to a digital terrestrial tuner 104 and an analog terrestrial tuner 105. A digital AV stream signal output from the digital terrestrial tuner 104 is input to the matrix switch 110.

  The NTSC video signal output from the analog terrestrial tuner 105 is digitized by the A / D converter 106 and then input to the NTSC video decoder 107. The NTSC video decoder 107 decodes the NTSC video signal to generate a digital luminance signal Y and color signals Cb and Cr. The luminance signal Y and the color signals Cb and Cr output from the NTSC video decoder 107 are input to the MPEG video encoder 108 and subjected to band compression (encoding) processing.

  On the other hand, the audio signal output from the analog terrestrial tuner 105 is digitized by the A / D converter 111. The audio signal output from the A / D converter 111 is input to the MPEG audio encoder 112 and subjected to band compression (encoding) processing.

  The video signal encoded by the NTSC video decoder 107 and the audio signal encoded by the MPEG audio encoder 112 are converted into a TS signal by being multiplexed by the MUX circuit 109 and input to the matrix switch 110.

  The matrix switch 110 selects one system TS signal including a program to be broadcast on the parent TV from the three systems TS input to the matrix switch 110 and sends the selected one to the DEMUX circuit 113 and broadcast on the child TV. One system TS signal including the program is selected and sent to the communication control unit 124. The matrix switch 110 is controlled by the control unit 127.

  The DEMUX 113 separates the TS signal sent from the matrix switch 110 into a video signal and an audio signal. The video signal obtained by the DEMUX 113 is sent to the MPEG video decoder 114. The MPEG video decoder 114 decodes the video signal to generate a luminance signal Y and color signals Cb and Cr. The luminance signal Y and the color signals Cb and Cr generated by the MPEG video decoder 114 are converted into RGB signals by the matrix circuit 115 and then input to the changeover switch 116.

  The digital NTSC signal output from the A / D converter 106 is also sent to the matrix circuit 117. The matrix circuit 117 converts the NTSC signal into an RGB signal. The RGB signal obtained by the matrix circuit 117 is input to the changeover switch 116. The changeover switch 116 selects and outputs one of the RGB signals respectively input from the matrix circuits 115 and 117 as an analog video signal. The analog video signal output from the changeover switch 116 is sent to the display 119 of the parent TV and displayed.

  The audio signal obtained by the DEMUX 113 is decoded by the MPEG audio decoder 120 and then sent to the D / A converter 121 to be converted into an analog signal. The audio signal output from the D / A converter 121 is input to the changeover switch 122. The audio signal output from the analog terrestrial tuner 105 is also input to the changeover switch 122. The changeover switch 122 selects and outputs one of the audio signals input from the D / A converter 121 and the analog terrestrial tuner 105, respectively. The audio signal output from the changeover switch 122 is sent to the speaker 123 and output.

  The changeover switches 116 and 122 are controlled by the control unit 127. That is, when the parent TV broadcasts a program received by the analog terrestrial tuner 105, the change-over switches 116 and 122 select the video signal output from the matrix circuit 117, and the change-over switch 122 The audio signal output from the analog terrestrial tuner 105 is controlled to be selected. When the parent TV broadcasts a program received by the other tuners 103 and 104, the selector switch 116 selects a video signal output from the matrix circuit 115, and the selector switch 122 selects the D / A converter 121. The audio signal output from is controlled to be selected.

  By controlling the changeover switches 116 and 122 in this way, deterioration in image quality and sound quality due to encoding and decoding of the analog terrestrial broadcast signal is prevented.

  The communication control unit 124 transmits the TS signal transmitted from the matrix switch 110 to the child TV via the wireless unit 125 and the antenna 126. The communication control unit 124, the wireless unit 125, and the antenna 126 constitute a wireless communication unit for performing bidirectional communication with the child TV.

  The control unit 127 controls the matrix switch 110 and the changeover switches 116 and 122, selects a tuner of a corresponding broadcast signal, receives control, and controls the parent TV by a channel selection command from the operation key 128 or the remote controller 129. Control each part of. In addition, the control unit 127 puts a tuner that is not in use into a standby state for power saving.

  In addition, the control unit 127 exchanges commands with the communication control unit 124 and controls the wireless communication unit. As will be described later, a control signal such as channel selection for the child TV is transmitted from the child TV to the control unit 127 via the wireless communication unit.

  The control unit 127 includes a memory 131. In the memory 131, when the designated channel of the parent TV and the designated channel of the child TV are channels received by the same tuner and are different from each other, which designation of the parent TV and the child TV is to be given priority? Priority data indicating is registered. The priority data is preset by the user.

  The control unit 127 is connected to the telephone line via the modem 130 in order to notify the management company of the viewing history of digital broadcasting.

FIG. 2 shows the configuration of the child TV.
The child TV includes a wireless communication unit that communicates with the parent TV. The wireless communication unit includes an antenna 201, a radio unit 202, and a communication control unit 203.

  The communication control unit 203 communicates with the control unit 204, and bidirectionally communicates commands based on instructions from the operation keys 205 and the remote controller 206.

  When the TS signal from the parent TV is received by the wireless communication unit, the received TS signal is sent to the DEMUX 207 and separated into a video signal and an audio signal. The video signal obtained by the DEMUX 207 is sent to the MPEG video decoder 208. The MPEG video decoder 208 decodes the video signal to generate a luminance signal Y and color signals Cb and Cr. The luminance signal Y and the color signals Cb and Cr generated by the MPEG video decoder 208 are converted into RGB signals by the matrix circuit 209 and then sent to the display 211 via the D / A converter 210 for display.

  The audio signal obtained by the DEMUX 207 is decoded by the MPEG audio decoder 212 and then sent to the speaker 214 via the D / A converter 213 and output.

  Note that the viewer of the child TV can input a channel selection instruction for the child TV by operating the operation key 205 or the remote controller 206. When a channel selection instruction is input, the control unit 204 transmits a command corresponding to the instruction to the parent TV. In this example, the power of the child TV is supplied by the battery unit 215 in order to eliminate the power cable of the child TV and increase the mobility. However, power may be supplied from an AC adapter or the like.

FIG. 3 shows a processing procedure by the control unit 127 of the parent TV.
When the power of the parent TV is turned on (step 1), the memory tuner channel of the parent TV (the channel that was selected immediately before the power was turned off last time and was stored in the non-volatile memory when the power was turned off last time. (Channel 2) is selected (Step 2). Therefore, the channel that was selected immediately before the previous power-off is selected and presented.

  It is determined whether or not a channel change request for the parent TV has been input by operating the operation key 128 on the parent TV side or the remote controller 129 (step 3). If a channel change request for the parent TV has not been input, it is determined whether a channel change request or a channel distribution request has been sent from the child TV (step 10). If neither a channel change request nor a channel distribution request has been sent from the child TV, it is determined whether or not a power OFF command for the parent TV has been input (step 17). When the power OFF command for the parent TV is not input, the process returns to step 3. If it is determined in step 17 that a power-off command for the parent TV has been input, the power of the parent TV is turned off (step 18). And this process is complete | finished.

  If it is determined in step 3 that a channel change request for the parent TV has been input, it is determined whether or not a program is being distributed from the parent TV to the child TV (step 4). If the program is not being distributed from the parent TV to the child TV, the process proceeds to step 9, and the viewing channel of the parent TV is changed to the channel indicated by the channel change request. When a program is being distributed from the parent TV to the child TV, the channel specified by the channel change request to the parent TV in step 3 and the viewing channel of the child TV are different from each other in the channel received by the same tuner. It is determined whether or not it is a channel (step 5).

  If the channel specified by the channel change request to the parent TV and the viewing channel of the child TV are not different channels within the channel received by the same tuner, that is, whether both channels are received by different tuners. Alternatively, if both channels are the same channel within the channel received by the same tuner, the process proceeds to step 9 where the parent TV viewing channel is changed to the channel indicated by the channel change request. If the channel specified by the channel change request to the parent TV and the viewing channel of the child TV are different channels within the channel received by the same tuner, the channel is based on the priority data stored in the memory 131. Then, it is determined whether or not the parent TV has priority (step 6).

  If the parent TV has priority, the child TV viewing channel is changed as the parent TV viewing channel is changed, so that the child TV viewing channel is changed from the parent TV to the child TV. After the notification (step 7), the process proceeds to step 9 to change the viewing channel of the parent TV to the channel indicated by the channel change request. If the parent TV does not have priority, that is, if the child TV has priority, a channel change impossible message is displayed on the parent TV (step 8), and the process proceeds to step 17. In this case, the viewing channel of the parent TV is not changed. As the channel change impossible message, for example, a message “Channel cannot be changed because child TV has priority” is used.

  When the channel is changed in step 9, it is determined whether or not a power OFF command for the parent TV is input (step 17). When the power OFF command for the parent TV is not input, the process returns to step 3.

  If it is determined in step 10 that a channel change request or channel distribution request has been sent from the child TV, the current parent TV viewing channel and the designated channel from the child TV are received by the same tuner. It is determined whether the channels are different from each other (step 11).

  If the current viewing channel of the parent TV and the instruction channel from the child TV are different channels within the channel received by the same tuner, it is determined whether or not the parent TV has priority (step). 13). If the parent TV has priority, the parent TV notifies the child TV of the channel change impossibility (step 14), and the process proceeds to step 17. In this case, the channel change for the child TV is not performed on the parent TV side.

  If the parent TV does not have priority, that is, if the child TV has priority, the parent TV viewing channel is also changed with the change of the child TV viewing channel. After displaying the channel change message “Channel has been changed” (step 15), after performing the operation for changing the channel to be delivered to the child TV to the channel designated by the child TV (step 16), Control goes to step 17. In this case, the viewing channel of the parent TV is also changed by changing the channel distributed to the child TV.

  In the above step 11, when it is determined that the current viewing channel of the parent TV and the instruction channel from the child TV are channels received by different tuners, or the same channel within the channels received by the same tuner. When it is determined that the channel to be distributed to the child TV is changed to the channel designated by the child TV (step 12), the process proceeds to step 17.

FIG. 4 shows a processing procedure by the control unit 204 of the child TV.
When the power of the child TV is turned on (step 21), the child TV notifies the parent TV of the start of communication (step 22). Based on whether or not there is a response from the parent TV, it is determined whether or not communication with the parent TV is possible (step 23). If communication with the parent TV cannot be performed, for example, a communication impossible message such as “cannot communicate” is displayed (step 24), and then it is determined whether or not a power OFF command is input to the child TV (step 24). Step 25). If no power OFF command is input to the child TV, the process returns to step 22. When a power OFF command for the child TV is input, the power of the child TV is turned off (step 26). And this process is complete | finished.

  If it is determined in step 23 that communication with the parent TV is possible, the memory tuner channel of the child TV (the channel that was selected immediately before the power was turned off last time and was non-volatile when the power was turned off last time. The distribution request of the tuner channel stored in the memory is transmitted to the parent TV (step 27). Then, the program receiving operation is started (step 28). Therefore, when a program is distributed from the parent TV to the child TV, the program is presented to the child TV. However, if the channel requested for distribution to the parent TV and the current parent TV viewing channel are different channels within the channel received by the same tuner and the parent TV has priority, the channel of the channel The program is not distributed, and a notification that the channel cannot be changed is sent from the parent TV.

  Therefore, after making a distribution request, it is determined whether or not a channel change impossibility notification has been received within a certain time (step 29). If a channel change impossibility notification is received within a predetermined time after the distribution request is made, a distribution request for a tuner channel different from the previous distribution request is transmitted to the parent TV (step 30). Then, the process returns to step 29.

  In step 29, if the channel change impossibility notification is not received within a certain time, that is, if the program is distributed from the parent TV and the program is presented on the child TV, the channel from the parent TV is displayed. It is determined whether or not a change notification has been received (step 31). This channel change notification is sent from the parent TV when the parent TV viewing channel is changed on the parent TV side and the child TV viewing channel is changed (step 7 in FIG. 3). reference).

  When a channel change notification is received from the parent TV, the program (channel) distributed from the parent TV is changed. For example, after displaying a channel change message such as “Channel changed” ( Step 32) and the process proceeds to Step 33. In this case, the viewing channel of the child TV is automatically changed. If the channel change notification from the parent TV has not been received, the process proceeds to step 33.

  In step 33, it is determined whether or not a channel change request for the child TV has been input by operating the operation key 205 or the remote controller 206 on the child TV side. If a channel change request for the child TV has not been input, it is determined whether or not a power OFF command for the child TV has been input (step 37). When the power OFF command for the child TV is not input, the process returns to step 31. If it is determined in step 37 that a power OFF command for the child TV has been input, the power of the child TV is turned OFF (step 38). And this process is complete | finished.

  If it is determined in step 33 that a channel change request for the child TV has been input, the channel change request is transmitted to the parent TV (step 34). When it is determined that the channel requested to change the channel to the parent TV and the viewing channel of the current parent TV are channels received by different tuners, it is determined that they are the same channel among the channels received by the same tuner. If a different tuner in the channels received by the same tuner or the priority is in the child TV, the program of the channel designated by the channel change request is delivered from the parent TV to the child TV. The viewing channel of the child TV is changed. However, if the channel for which the parent TV is requested to change the channel and the current viewing channel of the parent TV are different channels within the channel received by the same tuner and the parent TV has priority, that channel. Is not distributed, and a notification that the channel cannot be changed is sent from the parent TV.

  Therefore, after making a channel change request, it is determined whether or not a channel change impermissibility notification has been received within a certain time (step 35). When a channel change request notification is received within a certain time after making a channel change request, that is, when a channel change request is not accepted and the channel before the channel change request is maintained as a viewing channel. For example, after displaying a message indicating that the channel cannot be changed such as “Cannot change channel because parent TV has priority”, the process proceeds to step 37. If a channel change request notification is not received within a certain time after making a channel change request, that is, if the channel change request is accepted and the viewing channel is changed, the process proceeds to step 37. .

  In step 37, it is determined whether or not a power OFF command for the child TV has been input (step 37). When the power OFF command for the child TV is not input, the process returns to step 31.

  The present invention can also be applied when only one tuner is present. In this case, a program corresponding to one channel selected by the tuner is broadcast on the parent television and on the child television. In this case, when the designated channel of the parent TV and the designated channel of the child TV are different channels, priority data indicating which of the designation of the parent TV and the child television is to be prioritized is registered. If the designated channel of the parent TV and the designated channel of the child TV are different channels, the designation on the TV side having priority is given priority.

  Specifically, in step 5 of FIG. 3, it is determined whether or not the channel specified by the channel change request to the parent TV in step 3 and the viewing channel of the child TV are different from each other. Further, in step 11 in FIG. 3, it is determined whether or not the current viewing channel of the parent TV and the instruction channel from the child TV are different from each other.

It is a block diagram which shows the structure of parent TV. It is a block diagram which shows the structure of child TV. It is a flowchart which shows the process sequence by the control part 127 of parent | base TV. It is a flowchart which shows the process sequence by the control part 204 of child TV.

Explanation of symbols

103, 104, 105 tuner 110 matrix switch 116, 122 changeover switch 127 control unit 124 communication control unit 125 radio unit 126 antenna 131 memory 201 antenna 202 radio unit 203 communication control unit 204 control unit

Claims (4)

A parent TV and a child TV are provided. The parent TV selects one channel reception signal from one tuner and one reception signal received by one tuner, and the selected one channel reception signal is broadcast on the parent television. And a means for causing the child television to wirelessly transmit, and the child television receives a reception signal wirelessly transmitted from the parent television and broadcasts it on the child television.
The child television has a child television channel designation means for designating a channel desired to be viewed on the child television side and a means for wirelessly transmitting the designated channel to the parent television. The parent television sets a channel desired to be viewed on the parent television side. Channel designation means for parent TV to be designated, means for setting priority data indicating which channel designation of parent TV and child television is to be prioritized, storage means for holding the set priority data, and for parent television First control processing means for performing first control processing when a channel is designated by the channel designation means and second control when a channel designated by the child television channel designation means is transmitted from the subsidiary television. A second processing means for performing processing;
Means for determining whether or not the channel designated by the parent television channel designating means and the current viewing channel of the child television satisfy a first condition that they are different channels; If the first condition is not satisfied, means for changing the channel to the channel designated by the parent television channel designation means; if the first condition is satisfied, the parent television is prioritized based on the priority data. If the parent TV has priority, change the channel to the channel specified by the parent TV channel specification means, and if the child TV has priority The current state is maintained without executing the channel change to the channel designated by the parent television channel designation means. Comprises means for,
The second control processing means is means for determining whether or not the channel sent from the child television and the current viewing channel of the parent television satisfy the second condition that they are different from each other, the second condition If the condition is not satisfied, means for changing the channel to the channel sent from the child television, and if the second condition is satisfied, whether the child television has priority based on the priority data. If the child TV has priority, the channel is changed to the channel sent from the child TV. If the parent TV has priority, the channel sent from the child TV is changed. A television system comprising means for maintaining the current state without performing a channel change to The first control processing means changes the viewing channel to the child television in order to display that the viewing channel is changed on the child television when the first condition is satisfied and the parent television has priority. And a means for notifying the parent TV that the channel cannot be changed if the child TV has priority but satisfies the first condition,
The second control processing means satisfies the second condition and if the child television has priority, the second control processing means causes the parent television to display that the viewing channel is changed, and satisfies the second condition. 2. A display device according to claim 1, further comprising means for notifying the child television that the channel cannot be changed in order to display that the child television cannot change the channel when the parent television has priority. TV system as described in. A parent TV and a child TV are provided. The parent TV selects a reception signal for broadcasting the parent TV from a plurality of tuners and reception signals received by the plurality of tuners, and broadcasts it on the parent television. There is provided means for selecting a received signal and causing the child television to wirelessly transmit, and the child television is provided with means for receiving a reception signal for broadcasting the child television transmitted wirelessly from the parent television and causing the child television to broadcast. TV system
The child television has a child television channel designation means for designating a channel desired to be viewed on the child television side and a means for wirelessly transmitting the designated channel to the parent television. The parent television sets a channel desired to be viewed on the parent television side. Channel designation means for parent TV to be designated, means for setting priority data indicating which channel designation of parent TV and child television is to be prioritized, storage means for holding the set priority data, and for parent television First control processing means for performing first control processing when a channel is designated by the channel designation means and second control when a channel designated by the child television channel designation means is transmitted from the subsidiary television. A second processing means for performing processing;
The first control processing means satisfies the first condition that the channel designated by the parent television channel designating means and the current viewing channel of the child television are different channels within the channel received by the same tuner. If the first condition is not satisfied, the channel is changed to the channel designated by the parent television channel designation means, and the received signal obtained by the channel change is broadcast on the parent television. Means for selecting as a received signal for use, means for determining whether or not the parent TV has priority based on priority data when the first condition is satisfied, and when the parent TV has priority Change the channel to the channel specified by the parent TV channel specifying means, and change the channel. Is selected as the reception signal for broadcasting the parent TV and the child TV, and if the child TV has priority, change the channel to the channel specified by the parent TV channel specifying means. Has the means to maintain the current state without running,
Whether the second control processing means satisfies the second condition that the channel transmitted from the child television and the current viewing channel of the parent television are different channels within the channel received by the same tuner. If the second condition is not satisfied, the channel is changed to the channel sent from the child television, and the reception signal obtained by the channel change is selected as the reception signal for broadcasting the child television Means for determining whether or not the child television has priority based on the priority data, if the second condition is satisfied; Change the channel to the received channel, and use the received signal obtained by the channel change as the received signal for broadcasting the parent TV and the child TV And when the parent television has priority, it has means for maintaining the current state without executing channel change to the channel transmitted from the child television. TV system. The first control processing means changes the viewing channel to the child television in order to display that the viewing channel is changed on the child television when the first condition is satisfied and the parent television has priority. And a means for notifying the parent TV that the channel cannot be changed if the child TV has priority but satisfies the first condition,
The second control processing means satisfies the second condition and if the child television has priority, the second control processing means causes the parent television to display that the viewing channel is changed, and satisfies the second condition. 4. The apparatus according to claim 3, further comprising means for notifying the child television that the channel cannot be changed in order to display that the child television cannot change the channel when the parent television has priority. TV system as described in.

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