JP3137819B2 - Television signal processing device and television signal processing system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver (hereinafter, referred to as a television), a video tape recorder (hereinafter, referred to as a VTR), a satellite broadcast receiver (hereinafter, referred to as a BS tuner), and a satellite communication receiver. The present invention relates to a television signal processing device (hereinafter, referred to as a device) that handles television signals, such as a device (hereinafter, referred to as a CS tuner), and a television signal processing system configured by combining these devices.

[0002]

2. Description of the Related Art In recent years, with the development of information communication technology and the diversification of image information, devices for handling television signals have been equipped with BS tuners, CS tuners, cable television terminals, teletext terminals in addition to conventional televisions and VTRs. Various devices such as video discs and the like have been developed and put into practical use, and are now widely used in ordinary households.

[0003] Generally, these devices are used by being connected to a television. Then, by inputting a television signal, that is, a video signal and an audio signal, output from each device to the television, the video signal can be converted into an image on a CRT of the television, and the audio signal can be output from a speaker as audio. That is, information of a television signal output from each device, that is, video information and audio information can be viewed on a television. Note that, in this way, a television signal processing system is configured by combining a television with another device.

FIG. 5 shows a television 120 and a BS tuner 14.
FIG. 1 shows a configuration diagram of a television signal processing system configured by combining a C.0 and a CS tuner 140a. In the figure,
The television 120 receives a reception signal (hereinafter, referred to as a terrestrial signal) of a VHF or UHF antenna (not shown) from an antenna input terminal 104a.

[0005] The television 120 is connected to the BS tuner 14.
A video signal connection is made between a satellite broadcast television signal (hereinafter, referred to as a BS signal) output as 0, that is, a satellite broadcast video signal (hereinafter, referred to as a BS video signal) and an audio signal (hereinafter, referred to as a BS audio signal). The signals are input from a first external video signal input terminal 110 and a first external audio signal input terminal 111 via a cable 151 and an audio signal connection cable 152, respectively. The BS tuner 140 inputs a satellite broadcast reception signal received by a BS antenna (not shown) from a satellite broadcast reception signal input terminal 124a, and internally receives the BS broadcast signal.
The signal is demodulated into a video signal and a BS audio signal, and output from a BS video signal output terminal 132 and a BS audio signal output terminal 133, respectively.

[0006] Further, the television 120 is connected to the CS tuner 14.
A video signal connection is made between a satellite communication television signal (hereinafter, referred to as a CS signal) output from the video signal 0a, that is, a satellite communication video signal (hereinafter, a CS video signal) and an audio signal (hereinafter, a CS audio signal). The second external video signal input terminal 110a and the second external audio signal input terminal 111 are connected via the cable 151a and the audio signal connection cable 152a.
a. The CS tuner 140a
Inputs a satellite communication reception signal received by a CS antenna (not shown) from a satellite communication reception signal input terminal 124f,
Internally demodulates into a CS video signal and a CS audio signal, and outputs the CS video signal output terminal 132a and the CS audio signal output terminal 13
3a.

By configuring the television signal processing system as shown in FIG. 5, the television 120 can view not only terrestrial signal information, that is, general television programs, but also BS signal information, that is, satellite broadcasting. Program (hereinafter, B
It is called S program. ) And CS signal information, that is, a satellite communication program (hereinafter, referred to as a CS program) can also be viewed.

Further, reference numeral 101 shown in FIG. 5 denotes a remote control signal transmitter for television 120 (hereinafter, the remote control signal transmitter is referred to as a remote controller).
41 is a BS remote controller for the BS tuner 140, 141
a is a remote controller dedicated to CS of the CS tuner 140a.
The viewer operates the TV remote controller 101, the BS dedicated remote controller 141, and the CS dedicated remote controller 141a to operate the TV 120, the BS tuner 140,
Each of the CS tuners 140a can be remotely controlled. As described above, recently, remote controls dedicated to each device are added to almost all devices, and a viewer operates the dedicated remote control to give an operation command to each device from a remote place to perform a required operation. Can be executed.

[0009]

However, in the television signal processing system shown in FIG. 5, for example, in order to switch the program to be viewed from a general television program to a BS program, first, the operation unit of the television 120, that is, A TV signal changeover switch (not shown) on the TV remote control 101 is switched to input a BS signal, and then an operation unit of the BS tuner 140, that is, a tuning switch (not shown) on the BS dedicated remote control 141 is turned on. It is necessary to switch to the channel of the required BS program.

As described above, in order to switch a channel from a general television program to a BS program, it is necessary to operate the television remote controller 101 and further operate the BS remote controller 141.
There is a problem that operation is troublesome. In particular, the television 12
0 and the remote control 101 dedicated to the TV to the BS tuner 140
When the BS remote controller 141 is not added, the user must reach for and operate the operation panel (not shown) of the television 120 and the BS tuner 140 provided with the television signal changeover switch and the channel selection switch. It is even more troublesome because it does not have to be. Note that this procedure
When switching programs (information) between different devices,
From general TV programs to CS programs, and from BS programs to C programs
A similar procedure must be followed when switching to S programs and each other.

In the TV signal processing system shown in FIG. 5, the TV 120, the BS tuner 140, and the CS tuner 140a are installed in the TV remote control 1 respectively.
01, BS dedicated remote control 141, CS dedicated remote control 14
The location must be able to receive the remote control signal transmitted by 1a. In addition, in a state where each device is stored in a box through which a remote control signal does not pass, or a device that interferes with reception of a remote control signal is placed in front of a remote control signal receiving unit (not shown) of each device, These devices cannot be used. Therefore, there is a problem that the installation conditions of the devices, such as a place and a state where each device is installed, are limited. Even when these devices are not provided with a dedicated remote controller, each device is stored in a box in which the operation panel (not shown) of each device is difficult to operate, or the operation panel ( There are restrictions on the installation conditions of the device, such as that no obstacle should be placed in the operation of the device (not shown).

As described above, the TV remote controller 101, the BS remote controller 141, and the CS remote controller 141a shown in FIG. 5 are independent and dedicated to the TV 120, the BS tuner 140, and the CS tuner 140a, respectively. Therefore, by adding another device, a remote controller dedicated to that device is added.
As described above, when the number of dedicated remote controllers is large, it is difficult to know which dedicated remote controller is for which device, and confusion may be caused. Therefore, there is a problem in that management of the dedicated remote controller becomes difficult, and it takes time to operate each device using the dedicated remote controller, and as a result, the operation takes time.

In FIG. 5, BS tuner 140
In addition to the CS tuner 140a, each time a further device is added to the television 120, an unused external video signal input terminal 110b of the television 120 is used to input a video signal and an audio signal of the device. , And the external audio signal input terminals 111b,. But,
External video signal input terminals 110, 110 of television 120
, 110b,... and an external audio signal input terminal 11
Since the number of 1, 111a, 111b,... Is limited, the number of devices that can be connected to the television 120 is also limited.
That is, there is a problem that it is not possible to connect more devices than the number of input terminals of the television 120 for external television signals.

The present invention has been made in order to solve the above problems.
A television signal processing system is configured by connecting a plurality of devices in cascade, and operation command information corresponding to operation commands of each device is coupled to a transmission line of a television signal, so that the operation command information is transmitted between the devices. It is for input and output. Thus, an apparatus capable of inputting operation commands of all the devices constituting the television signal processing system from one device and a television signal processing system are provided.

[0015]

According to a first aspect of the present invention, there is provided a television signal processing apparatus comprising command output means for outputting operation command information corresponding to an externally applied operation command, and operating in accordance with the operation command information. in a first television signal output means for generating and outputting a first television signal, external instrumentation
Device can be connected, and a first external television signal can be transmitted from the external device.
A first external television signal input terminal capable of inputting a signal, first television signal switching means for selecting and outputting one of the first television signal and the first external television signal,
When the operation command information is command data for outputting the first television signal, the first television signal is selected, and the operation command information outputs a predetermined television signal other than the first television signal. When the first external television signal is selected when the command data is the command data,
First switching signal output means for outputting a first switching signal for switching the television signal switching means, and an operation command information modulated signal obtained by modulating the operation command information to the external device via the first external television signal input terminal comprising modulating means for the
And the external device generates the first external television signal.
First external television signal output means for outputting the operation signal;
Command, and demodulates the signal to demodulate it.
Demodulation means for reproducing operation command information;
The operation command information obtained by demodulation according to
Command data to output a predetermined TV signal other than the TV signal
, The first external television signal is transmitted to the first external television signal.
This is configured to be input to the input terminal .

According to a second aspect of the present invention, there is provided a television signal processing apparatus comprising command output means for outputting operation command information corresponding to an externally applied operation command, and operating according to the operation command information. The second television signal output means for generating and outputting an image can be connected to the first external device.
And a second external television signal is transmitted from the first external device.
Second and external TV signal input terminal can be input, and a second television signal switching means for selecting either one of said second television signal and the second external television signal, said first outer
A second external device different from the external device can be connected,
A television signal output terminal for output the signal selected by said second television signal switching means with respect to second external device,
From the second external device through the television signal output terminal
The time the first recovery <br/> regulating means for demodulating the operation command information modulated signal provided, the demodulated output of said first demodulating means is equivalent to the command data to output the second television signal Te state second television signal is selected the first time, also is equivalent to the command data demodulated output of said first condensate <br/> tone means to output a predetermined television signal other than said second television signal 2 When an external television signal is selected and the operation command information is
Signal is transmitted through the second external television signal input terminal.
A second switching signal for outputting a second switching signal for switching the second television signal switching means to a state of being output to the first external device;
Comprising switching and signal output means, wherein the first external device
Generates and outputs the second external television signal.
Unit television signal output means and the operation command information modulation signal
Second demodulation means for receiving and demodulating the received signal.
The demodulated output of the second demodulating means is the second television signal.
Equivalent to command data to output a specified TV signal other than
, The second external television signal is transmitted to the second external television signal.
This is configured to be input to the input terminal .

A television signal processing system according to a third aspect of the present invention
A first external television signal input terminal of the device of the first invention and a second external television signal input terminal;
And a television signal output terminal of the device according to the invention.

A television signal processing system according to a fourth aspect of the present invention comprises:
In a third television signal processing system of the present invention, apparatus according to claim 2 is plural, the plurality of claim
2. A television signal processor among the television signal processing devices described in 2.
A second external television signal input terminal of the
TV signal processing equipment other than the TV signal processing equipment
Connected to the signal output terminal.
The above-mentioned television signal processing devices are sequentially connected in cascade.

[0019]

According to the first aspect of the present invention, the first television signal switching means outputs the first television signal output from the first television signal output means and the first television signal from the external device based on the operation command information .
One of the first external television signals input through the external television signal input terminal is selected and output. The first television signal switching means outputs the first television signal based on the switching signal output from the first switching signal output means, that is, when the operation instruction information is instruction data for outputting the first television signal. The operation command information is a predetermined television signal other than the first television signal , for example, a first external television signal.
First external device input from an external device connected to the input terminal
When the command data is to output a TV signal, the first
The state switches to the state of selecting and outputting an external television signal.
The information can be viewed by inputting the first television signal or the first external television signal to a CRT and a speaker. On the other hand, the modulating means outputs an operation command information modulated signal obtained by modulating the operation command information to an external device via the first external television signal input terminal. In addition, outside
The device is operated by the demodulation means by the operation command information modulated signal.
The operation command information obtained by demodulating the
A first external television signal generated by the Levi signal output means
When the command data indicates that the first external
A television signal is input to a first external television input terminal.

According to the second invention, the first demodulating means is:
Operation command information supplied via the TV signal output terminal
The operation command information is reproduced by demodulating the tuning signal.
You. Then, based on the operation command information, the second television signal switching means outputs the second television signal output from the second television signal output means and the second external television signal from the first external device.
One of the second external television signals input via the video signal input terminal is selected. The second TV signal switching means outputs the second TV signal when the operation command information is command data for outputting the second TV signal, and outputs a predetermined TV signal other than the second TV signal , for example, A first television signal input terminal connected to the second television signal input terminal;
Outputting a second external television signal input from an external device;
When the command data is the command data, the state is switched to the state of selecting the second external television signal. The second television signal or the second external television signal selected by the second television signal switching means is supplied to the second external television signal via the television signal output terminal.
Output to the device .

Further, when the second television signal switching means switches to a state in which the second external television signal is output from the television signal output terminal, the second external television signal input terminal and the television signal output terminal are connected. . Therefore, the second
The operation command information modulation signal supplied from the external device through the television signal output terminal is a second external television signal input terminal.
Is output to the first external device via the . In addition, the first outside
The external device converts the operation command information by the second demodulation means.
The operation command information obtained by demodulating the tuning signal has the second
The second external television generated by the external television signal output means
When the command data indicates that the
2 Input the external TV signal to the second external TV input terminal.
You.

According to the third invention, a television signal processing system is configured by connecting the first external television signal input terminal of the device of the first invention to the television signal output terminal of the device of the second invention. are doing. That is, the device of the first invention
Looking at the apparatus of the second invention from FIG.
Corresponds to the external device in the first invention. On the other hand, the second
Looking at the first apparatus from the apparatus of the first invention, the first invention
Corresponds to the second external device in the second invention.
You. According to this configuration, the operation command information modulated signal obtained by modulating the operation command information in the device of the first invention is transmitted to the second device of the second invention via the first external television signal input terminal and the television signal output terminal . 1 is demodulated, whereby the operation command information is reproduced. Therefore, when an operation command corresponding to the operation command information for operating the device of the second invention is given to the device of the first invention, the operation command information is transmitted to the device of the second invention, whereby the second command is transmitted. Can operate the device of the present invention.

Here, when the operation command information is command data for outputting the first television signal of the device of the first invention, the first television signal switching means switches to output the first television signal. Then, by inputting the output first television signal to a CRT and a speaker,
You can watch that information.

On the other hand, when the operation command information is command data for outputting the second television signal of the device of the second invention, the second television signal switching means outputs the second television signal from the television signal output terminal. Switch. Then, the second television signal output from the television signal output terminal is input to the device of the first invention via the first external television signal input terminal. At the same time, the first television signal switching means of the apparatus of the first invention automatically outputs the first external television signal input from the first external television signal input terminal, that is, the second television signal. Switch. Therefore, as described above, the information can be viewed by inputting the output second television signal to the CRT and the speaker.

According to the fourth invention, a plurality of the devices of the second invention constituting the television signal processing system of the third invention are provided in plural, and the plurality of devices of the second invention are sequentially connected in cascade. This constitutes a television signal processing system. Here, when the operation command information corresponding to the operation command given to the device of the first invention is command data for outputting a second television signal of any one of the devices of the second invention connected in cascade in sequence. The first television signal switching means of the device of the first invention switches so as to output a first external television signal.

Further, the device of the second invention connected to the device of the first invention is similar to the device of the third invention when its operation command information is command data for outputting its own second television signal. Then, the second television signal switching means is switched so that the second television signal is output from the television signal output terminal. On the other hand, when the operation command information is command data for outputting a second television signal other than its own second television signal, the second television signal switching means automatically outputs the second external television signal from the television signal output terminal. Switch.
As a result, the second external television signal input terminal and the television signal output terminal of the device of the second invention are connected, so that the operation command information modulated signal obtained by modulating the operation command information in the device of the first invention is Is input to the device of the second invention connected next via the device of the second invention.

The second input of the operation command information modulation signal
In the apparatus according to the invention, the operation command information is reproduced by the demodulation means. Then, as described above, the second television signal switching means is automatically switched based on the operation command information. This operation is performed until the second television signal of any of the devices of the second invention that constitutes this television signal processing system is output to the device of the second invention connected to the device of the first invention. It is performed sequentially from the device. As described above, the operation commands given to the device of the first invention are sequentially transmitted to the device of the second invention. Therefore, by giving an operation command to the device of the first invention, all the devices constituting the television signal processing system can be operated.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described with reference to FIGS. FIG. 1 shows a television 20 and a BS tuner 40.
FIG. 1 is a configuration diagram of a television signal processing system configured by a CS tuner 40a. In FIG.
Numeral 0 denotes a terrestrial signal of a terrestrial antenna (not shown) from a terrestrial signal input terminal 4a, and a BS tuner 40 transmits a BS-IF signal of a BS antenna (not shown) from a BS-IF signal input terminal 24a to CS. The tuner 40a inputs a CS-IF signal of a CS antenna (not shown) from a CS-IF signal input terminal 24f. The remote control signal transmitted from the remote control 1 is received by the television 20.

The external video signal input terminal 10 and the external audio signal input terminal 11 of the television 20 are connected to the BS video signal output terminal 32 and the BS video signal output terminal 32 of the BS tuner 40 via a video signal connection cable 51 and an audio signal connection cable 52, respectively. They are connected to the BS audio signal output terminals 33, respectively.
Then, the external video signal input terminal 30 of the BS tuner 40
The external audio signal input terminal 31 is connected to the CS video signal output terminal 32a of the CS tuner 40a via the video signal connection cable 51a and the audio signal connection cable 52a, respectively.
And CS audio signal output terminal 33a. Furthermore, by connecting a plurality of devices in cascade to the external video signal input terminal 30a and the external audio signal input terminal 31a of the CS tuner 40a in the same manner as described above, The number can be increased.

FIG. 2 shows an electric circuit diagram of a main part of the television 20. In the figure, a remote control signal transmitted from a remote control 1 is received by a remote control signal receiving unit 2 and converted into an electric signal. Then, the electric signal is input to the microcomputer 3 and analyzed there, and operation command information corresponding to the remote control signal is generated. Therefore, the command output means for outputting the operation command information is constituted by the microcomputer 3.

Here, the operation command information is a terrestrial signal,
That is, if the instruction data is for selecting a general television program, the microcomputer 3 transmits the terrestrial channel selection data to the terrestrial channel selection unit 4b. As a result, the terrestrial channel selection section 4b selects a channel corresponding to the terrestrial channel selection data from the terrestrial signal input from the terrestrial signal input terminal 4a. Then, the selected terrestrial wave signal is demodulated by the terrestrial wave demodulation unit 4c, and further separated into a television video signal and a television audio signal. The separated television video signal is subjected to signal processing by the video signal processing unit 4d,
It is supplied to the video signal changeover switch 5. On the other hand, the television audio signal is subjected to signal processing in the audio signal processing unit 4e, and is then supplied to the audio signal switch 6. The terrestrial signal input terminal 4a, the terrestrial tuning unit 4b, the terrestrial demodulation unit 4c,
The video signal processing section 4d and the audio signal processing section 4e constitute a television signal output section 4. The television signal output unit 4 corresponds to a first television signal output unit.

The microcomputer 3 outputs the above-mentioned terrestrial channel selection data and, at the same time, transmits a switching signal to the video signal switching switch 5 and the audio signal switching switch 6, and the television signal supplied from the television signal output unit 4. The video signal and the television audio signal are output from the video signal output terminal 12 and the audio signal output terminal 13. By inputting the video signal and the audio signal to the CRT and the speaker, the information can be viewed.

On the other hand, when the operation command information is a TV signal other than a terrestrial signal, that is, a TV signal of an externally connected device, that is, command data for selecting a BS program or a CS program, the microcomputer 3 The switching signal is transmitted to the video signal changeover switch 5 and the audio signal changeover switch 6, and the external video signal and the external audio signal are output from the video signal output terminal 12 and the audio signal output terminal 13. Thus, the external video signal is output from the video signal output terminal 12 via the external video signal input terminal 10, the directional coupler 8, the low-pass filter 9, and the video signal changeover switch 5. The external audio signal is supplied to the external audio signal input terminal 11.
And audio signal output terminal 1 via audio signal changeover switch 6
3 is output. By inputting the external video signal and the external audio signal to a CRT and a speaker, the information can be viewed.

The external video signal input terminal 10 and the external audio signal input terminal 11 correspond to a first external television signal input terminal. The video signal changeover switch 5 and the audio signal changeover switch 6 correspond to first television signal changeover means. Then, as described above, the first switching signal output means for outputting a switching signal for switching the video signal switching switch 5 and the audio signal switching switch 6 based on the operation command information,
It is constituted by a microcomputer 3.

The microcomputer 3 outputs the switching signal and simultaneously outputs external signal tuning data for selecting an external signal based on the operation command information.
Send to The modulator 7 modulates a carrier having a predetermined frequency with the external signal tuning data. And the directional coupler 8
Outputs the modulated external signal tuning data from the external video signal input terminal 10. Here, the predetermined frequency at which the modulating unit 7 modulates indicates a frequency that does not affect the external video signal. Further, since the directional coupler 8 is provided to output the modulated external signal tuning data from the external video signal input terminal 10 to the outside, that is, in the direction of the arrow 8a, the modulated external signal tuning data is output. Does not affect the interior of the device. Note that the modulator 7 and the directional coupler 8 correspond to a modulator.

As described above, in the television 20, the microcomputer 3 analyzes the operation command information and outputs terrestrial channel selection data based on the command data or external signal selection data to the outside. At the same time, a switching signal for switching the video signal switch 5 and the audio signal switch 6 is also output. Therefore, by simply giving an operation command to select a program to be viewed from the remote controller 1, a general TV program or a device connected to the outside, that is, a program of a BS tuner or a CS tuner, is selected, and at the same time, the channel is selected. The video signal switch 5 and the audio signal switch 6 are automatically switched so that the selected program is output to the CRT and the speaker.

FIG. 3 shows an electric circuit diagram of a main part of the BS tuner 40. In the BS video signal output terminal 32 of FIG.
0 and the video signal connection cable 51. The external signal tuning data is input to the demodulation unit 35 via the band pass filter 34 as shown by an arrow 34a. After being demodulated by the demodulation unit 35, the demodulated data is input to the microcomputer 23, where it is analyzed. Note that the band pass filter 34 and the demodulation unit 35 correspond to a demodulation unit.

If the external signal tuning data is a BS-IF signal, that is, command data for tuning a BS program, the microcomputer 23 transmits the BS-IF signal tuning data to the BS-IF signal tuning unit 24b. . This BS-I
The F signal tuning section 24b is provided with a BS-IF signal input terminal 24a.
, A BS signal demodulation unit 24c, a BS video signal processing unit 24d, and a BS audio signal processing unit 24e.
Is composed. This BS signal output unit 24 is similar to the case where the television signal output unit 4 of FIG. 1 processes a terrestrial signal.
A BS-IF signal output from a BS antenna (not shown) is processed, and a B-IF signal corresponding to BS-IF signal selection data is processed.
The BS video signal and the BS audio signal of the S program are output. Then, the BS video signal and the BS audio signal are supplied to a video signal switch 25 and an audio signal switch 26, respectively. The BS signal output unit 24 corresponds to a second television signal output unit.

The microcomputer 23 outputs the BS-IF signal selection data and, at the same time, transmits a switch signal to the BS video signal switch 25 and the BS audio signal switch 26, and supplies the switch signal from the BS signal output unit 24. The output BS video signal and BS audio signal are output from the BS video signal output terminal 32 and the BS audio signal output terminal 33.

On the other hand, if the operation command information is a television signal other than the BS-IF signal, that is, command data for selecting a CS program of the CS tuner 40a, the microcomputer 23 sets the BS video signal switch 25 and the BS audio
Each of these switches 25 is
And 26 are transmitted. this
, Through the BS video signal switch 25,
External video signal input terminal 30 and BS video signal output terminal 3
Are connected to each other via a BS audio signal changeover switch 26.
And an external audio signal input terminal 31 and a BS audio signal output terminal.
The terminals 33 are connected. And the CS tuner 40a
The CS video signal and CS audio signal are
25 and 26, a BS video signal output terminal 32 and
It is output from the BS audio signal output terminal 33. External signal selection data from the television 20 is output from the external video signal input terminal 30 via the BS video signal output terminal 32 and the BS video signal changeover switch 25, and is output from the CS tuner via the video signal connection cable 51a. 40a.

The external video signal input terminal 30 and the external audio signal input terminal 31 correspond to a second external television signal input terminal. The BS video signal changeover switch 25 and the BS audio signal changeover switch 26 correspond to second television signal changeover means. The BS video signal output terminal 32 and the BS audio signal output terminal 33 correspond to a second television signal output terminal. Further, as described above, the second switching signal output means for outputting a switching signal for switching the video signal switching switch 25 and the audio signal switching switch 26 based on the operation command information is constituted by the microcomputer 23.

As described above, the BS tuner 40 is connected to the television 2
0, the external signal selection data output from the television 20a is input, the BS program corresponding to the external signal selection data is selected, and at the same time, the BS video signal changeover switch 25 and the BS The audio signal switch 26 is switched. Therefore, the BS tuner selects a BS program only by inputting external signal tuning data, and at the same time, selects either the BS program or an externally connected device, that is, the CS program of the CS tuner 40a. Output can be automatically switched. When the external signal selection data is a command to select a CS program, the external signal selection data is transmitted to the external video signal input terminal 3.
It can be output from 0.

The BS tuner 40 operates based on the external signal selection data obtained from the BS video signal output terminal 32, that is, the operation command. However, the BS tuner 40 is operated by directly giving an operation command to this device. An operation unit may be provided so as to perform the operation. In this case, the command output means for outputting operation command information corresponding to the operation command is constituted by the microcomputer 23.

The CS tuner 40a shown in FIG.
While the tuner 40 receives the BS program, it is a device that receives the CS program. Other than that, the tuner 40 has the same configuration as the BS tuner 40 in FIG. 3 and has the same operation. Therefore, the details are omitted.

Next, the operation of the television signal processing system shown in FIG. 1 will be described with reference to the flowchart of FIG. First, a program of an arbitrary device desired to be viewed is selected by the remote controller 1. The remote control signal transmitted from the remote control 1 is received by the television 20 (step S2).

The television 20 determines whether or not the instruction data of the remote control signal is an instruction to select a general television program (step S4). Here, if the command data is a command to select a general television program (if the determination in step S4 is YES), the TV program corresponding to the command data, that is, the terrestrial channel selection data is selected. (Step S6a). Then, the television program is transmitted to the television 20.
The television signal changeover switch inside the television 20 is automatically switched so that the user can view the contents on the CRT and the speaker inside (step S8a). Thereby, this general television program can be viewed.

On the other hand, if the instruction data is an instruction to select a program other than a general television program, that is, a BS program or a CS program (when the determination in step S4 is NO), a television signal switch inside the television 20 Is switched so that signals input from the external video signal input terminal 10 and the external audio signal input terminal 11 are output (step S6).
b). At the same time, the command data, that is, the external signal selection data, is superimposed on the video signal connection cable 51 and transmitted to the BS tuner 40 (step S8b). The flow of the external signal tuning data is indicated by an arrow 53.

The BS tuner 40 to which the external signal tuning data has been input determines whether or not the external signal tuning data is a command to select a BS program (step S10). Here, when the command data is a command to select a BS program (when the determination in step S10 is YES), the BS program corresponding to the external signal tuning data is selected (step S12a). Then, the BS video signal and the BS audio signal of the BS program are supplied to the BS video signal output terminals 32 and B
The television signal changeover switch inside the BS tuner 40 is automatically switched so as to be output from the S audio signal output terminal 33 (step S14a). By this, this B
Since the S video signal and the BS audio signal are input from the external video signal input terminal 10 and the external audio signal input terminal 11 to the television 20, the BS program of the BS tuner 40 is transmitted to the television 2.
0 can be watched.

If the external signal tuning data is a command to tune a program other than the BS program, that is, a CS program (when the determination in step S10 is NO), the television signal changeover switch inside the BS tuner 40 Is switched so that signals input to the external video signal input terminal 30 and the external audio signal input terminal 31 are output from the BS video signal output terminal 32 and the BS audio signal output terminal 33 (step S1).
2b). Then, the external signal tuning data output from the television 20 is output from the external video signal input terminal 30 via the BS tuner 40 (step S14b).
This external signal tuning data is stored in the video signal connection cable 51a.
Is transmitted to the CS tuner 40a via the. Note that the flow of the external signal tuning data is indicated by an arrow 53a.

The CS tuner 40a that has received the external signal tuning data determines whether the external signal tuning data is a command to select a CS program, similarly to the BS tuner 40 (step S16). If the command data is a command to select a CS program (if the determination in step S16 is YES), a CS program corresponding to the external signal tuning data is selected (step S18a). Also, the CS tuner 40a is set so that the CS video signal and the CS audio signal of the selected CS program are output from the CS video signal output terminal 32a and the CS audio signal output terminal 33a.
The internal television signal switch is automatically switched (step S20a). As a result, the CS video signal and the CS audio signal are input to the television 20 via the BS tuner 40, so that the CS program of the CS tuner 40a can be viewed on the television 20.

Further, the external video signal input terminal 30a and the external audio signal input terminal 31a of the CS tuner 40a
Further, a plurality of devices similar to those in FIG. 3 can be connected in cascade by the same connection method as described above. Then, similarly to the above, by giving an operation command from the remote controller 1 to the television 20, the television signal information of those devices can be viewed on the television 20.

As described above, in this television signal processing system, channel selection data of a program given to the television 20 is
The signals are sequentially transmitted to the BS tuner 40 and the CS tuner 40a via the video signal connection cables 51 and 51a. In each device, a program is selected based on the channel selection data. At the same time, a television signal changeover switch inside each device is automatically set so that the selected program can be viewed on the television 20. It is configured to switch to.
Therefore, when the program to be viewed is switched between different devices, for example, when the television program on the television 20 is switched to the BS program on the BS tuner 40, the program is selected by the channel selection switch (not shown) of the remote controller 1. By simply doing so, the BS program is output to the CRT and speakers in the television 20. Therefore, the tuning operation becomes much easier than before.

In this television signal processing system, the only device that receives the remote control signal of the remote control 1 is the television 20. Therefore, for the devices other than the television 20 that do not need to receive the remote control signal, that is, for the BS tuner 40 and the CS tuner 40a, the installation conditions such as the place and the state where they are installed are not limited as in the related art. The degree of freedom of installation is improved. That is, devices other than the television 20 can be installed in a box or on a high shelf that is out of reach.

Further, by giving an operation command from the remote controller 1 to the television 20, all the devices constituting the television signal processing system can be operated. Therefore, even if the number of devices constituting the television signal processing system is increased, the number of remote controllers is one, which makes it much easier to manage and operate the remote controllers than before. Therefore, it is possible to avoid confusion when using the remote controller 1 and take time for the operation, and as a result, the operation does not take much time.

Even if a new device is added to this television signal processing system, the added device is CS
It is merely connected in cascade from the external video signal input terminal 30a and the external audio signal input terminal 31a of the tuner 40a. Therefore, unlike the related art, the number of devices constituting the television signal processing system is not limited by the number of external television signal input terminals of the television. In addition, video signal connection cables 51, 51a,.
. And audio signal connection cables 52, 52a,.
The structure and operation are very simple because only the cables are connected.

In the present embodiment, the television 20, the BS tuner 40, and the CS tuner 40a have been described as television signal processing devices. However, the present invention is not limited to these. For example, a VTR, a cable television terminal, a teletext terminal, a video disk, etc. The same applies to other television signal processing devices. In the case of a VTR, recording / playback data and the like can be added to the command data in addition to the command data for selecting a program. In addition, although the external signal tuning data is superimposed on the video signal transmission line, it can be superimposed on the audio signal transmission line and transmitted.

[0057]

According to the first aspect of the present invention, the operation command information is a first television signal when the operation command information is command data for outputting the first television signal, and the operation command information is a predetermined television signal other than the first television signal. That is, to the first external TV signal input terminal
First external television signal input from a connectable external device
The first external television signal is output when the instruction data is to output the first external television signal. Therefore, it is possible to automatically switch which of the first television signal and the first external television signal to output based on the command data of the operation command information.

On the other hand, the operation command information modulated signal obtained by modulating the operation command information is output via the first external television signal input terminal.
Output to the external device . Accordingly, the first external television signal input terminal has a function of inputting the first external television signal from the external device, and also has a function of connecting to the external device.
Then, an operation command information modulation signal for controlling this can be output. Therefore, it is not necessary to newly provide a dedicated output terminal for outputting the operation command information to the external device .

The device according to the second aspect of the present invention is configured such that the second external device
The operation command information can be reproduced by demodulating the operation command information modulation signal supplied via the television signal output terminal by the first demodulation means. When the operation command information is command data for outputting the second television signal, the second television signal switching means outputs the second television signal and a predetermined television signal other than the second television signal , that is, the second television signal .
Input from a first external device connectable to the
Command data for outputting a second external television signal to be output.
At this time, the state is switched to a state in which the second external television signal is output from the television signal output terminal. Therefore, based on the operation command information input through the television signal output terminal, the second
Which of the television signal and the second external television signal to output from the television signal output terminal can be automatically switched.

When the second television signal switching means switches to a state in which the second external television signal input from the second external television signal input terminal is output from the television signal output terminal, the second external television signal input terminal is switched to the second external television signal input terminal. The TV signal output terminal is connected. Therefore, the text is received from the second external device.
The operation command information modulation signal supplied via the TV signal output terminal is supplied to the first external device via the second television signal input terminal.
Output (ie, transmission) .

A television signal processing system according to a third aspect of the present invention
A first external television signal input terminal of the device of the first invention and a second external television signal input terminal;
By connecting to the television signal output terminal of the device of the invention of the present invention, the operation command information of the device of the first invention is transmitted to the device of the second invention. Therefore, the first
By giving an operation command to operate the device of the second invention to the device of the second invention, the device of the second invention can be operated. That is, by giving an operation command to the device of the first invention, it is possible to cause the devices of the first and second inventions to perform required operations. This eliminates the need to directly operate the device to give an operation command to the device of the second invention. Therefore, the device of the second invention can be installed, for example, in a box or on a high shelf that is out of reach. In other words, the installation conditions such as the installation place and the state of the apparatus are not restricted as in the related art, and the degree of freedom of the installation of the apparatus is improved as compared with the related art.

Even if a remote control is used as a means for giving an operation command to the television signal processing system,
By transmitting a remote control signal from one remote control to the device of the first invention, it is possible to cause both the devices of the first and second inventions to perform desired operations. Therefore, it is not necessary to manage and operate the remote controllers as many as the devices constituting the television signal processing system unlike the related art.
As a result, there is an effect that management and operation of the remote controller become much easier than before. In addition, there is no mess when using the remote control, and no time and effort are required for the operation.

When the operation command information corresponding to the operation command is command data for outputting the second television signal of the device of the second invention, the first television signal switching means of the device of the first invention outputs the second television signal. It is automatically switched to output one external television signal, that is, the second television signal. Therefore, when the signal to be viewed is switched from the first television signal of the device of the first invention to the second television signal of the device of the second invention, that is, the signal to be viewed is changed to the first and second television signals. When switching between the two, the signal to be viewed can be switched only by giving an operation command for outputting any one of the first and second television signals to the apparatus of the first invention. This eliminates the need to separately issue an operation command to each of the first and second devices as in the related art, and thus has the effect of simplifying the procedure for switching the television signal as compared with the related art.

A television signal processing system according to a fourth aspect of the present invention
A plurality of devices of the second invention constituting the television signal processing system of the third invention are provided.
By sequentially connecting the devices in cascade, the operation command information is sequentially transmitted from the device of the second invention connected to the device of the first invention until a television signal corresponding to the operation command information is output. It is a configuration that goes. Therefore, by giving an operation command to the device of the first invention, a desired television signal can be output from the television signals of all the devices constituting the television signal processing system. The same effect as that of the invention is achieved.

Even if the device of the second invention is newly added to the television signal processing system, the device is not directly connected to the device of the first invention. That is,
Even if the number of devices of the second invention constituting this television signal processing system is plural, only one device is directly connected to the device of the first invention. Therefore, as before,
The number of devices constituting the television signal processing system is not limited by the number of external television signal input terminals of the device. Therefore, there is an effect that the number of the devices of the second invention exceeding the number of the first television signal output terminals of the device of the first invention can be connected.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a television signal processing system according to an embodiment of the present invention.

FIG. 2 is a main part electric circuit diagram of the television signal processing apparatus according to the embodiment.

FIG. 3 is an essential part electric circuit diagram of the television signal processing device according to the embodiment.

FIG. 4 is a flowchart showing an operation flow of the embodiment.

FIG. 5 is a configuration diagram of a conventional television signal processing system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 remote control device 2 remote control signal receiving unit 3 microcomputer 4 television signal output unit 5 first video signal changeover switch 6 first audio signal changeover switch 7 modulation unit 8 directional coupler 10 first external video signal input terminal 11 first External audio signal input terminal 12 First video signal output terminal 13 First audio signal output terminal

Claims (4)

(57) [Claims] 1. A television signal processing device comprising command output means for outputting operation command information corresponding to an operation command given from outside, and operating in accordance with the operation command information, generating and outputting a first television signal. The first television signal output means can be connected to an external device.
A first external television signal input terminal to which a television signal can be input; first television signal switching means for selecting and outputting one of the first television signal and the first external television signal; Is the command data for outputting the first television signal, and the operation command information is command data for outputting a predetermined television signal other than the first television signal when the first television signal is selected. When the first external television signal is selected,
First switching signal output means for outputting a first switching signal for switching the television signal switching means; and an operation command information modulated signal obtained by modulating the operation command information to the external device via the first external television signal input terminal.
Anda modulation means for outputting said external device, out to generate the first external television signal
First external television signal output means for inputting the operation command information;
Receiving the modulated signal and demodulating it,
Demodulation means for reproducing command information.
The operation command information obtained by demodulating the first television signal
Command data to output a predetermined TV signal other than
When the first external television signal is input to the first external television signal.
TV signal processing device configured to input to the input terminal . 2. A television signal processing device comprising command output means for outputting operation command information corresponding to an operation command given from the outside, and operating in accordance with the operation command information, generating and outputting a second television signal. The second television signal output means can be connected to a first external device.
A second external television signal input terminal capable of inputting et second external television signal, and a second television signal switching means for selecting either one of said second television signal and the second external television signal, said first A second external device different from the external device can be connected
, And the via and TV signal output terminal for output the signal selected by said second television signal switching means with respect to the second external device, the television signal output terminal from the second external device
The time the first recovery <br/> regulating means for demodulating the operation command information modulated signal provided, the demodulated output of said first demodulating means is equivalent to the command data to output the second television signal Te When the second television signal is selected, and when the demodulated output of the first demodulation means is equivalent to command data for outputting a predetermined television signal other than the second television signal, the second external television signal is output. The selected operation command information modulation signal
Through the second external television signal input terminal.
Ready to be output to an external device, the second switching signal output means second outputting a second switching signal for switching the television signal switching means, provided with a, the first external device, the second external TV Generate signal
Second external television signal output means for outputting and outputting the same
A second method for receiving the command information modulated signal and demodulating it.
And a demodulation output of the second demodulation means.
A predetermined television signal other than the second television signal is output.
When the second external television signal is equivalent to
To the second external TV input terminal.
The television signal processing apparatus. 3. A television signal processing system having a configuration in which a first external television signal input terminal of the television signal processing device according to claim 1 and a television signal output terminal of the television signal processing device according to claim 2 are connected. . 4. The television signal processing system according to claim 3, wherein the television signal processing device according to claim 2 is plural, and the television signal processing device according to claim 2 is plural.
Signal processing device, a second external device of a television signal processing device.
What is a TV signal input terminal and this certain TV signal processing device?
Connect to the TV signal output terminal of another TV signal processing device
3. The television signal processing according to claim 2,
A television signal processing system having a configuration in which devices are sequentially connected in cascade.