JPH07254998A - Control signal transmitting method, transmitter and receiver - Google Patents

Abstract

PURPOSE:To simplify the configuration of a device by transmitting a control signal for operating an equipment on the reception side while inserting it into an analog sound on the transmission side, and extracting that control signal from the demodulated analog sound on the reception side. CONSTITUTION:The control signal for operating the equipment on the reception side is composed of a frame-structured pulse sequence based on the pulse sequence of an infrared signal for a remote controller, for example. When transmitting the program of a VTR 1 through a modulation part 11 to the line of a communication satellite 2 or the like, the control signal from a control signal generator 13 is superimposed through a mixer 12 provided at the transmission line of an analog sound signal onto the analog sound signal. On the reception side, a control signal reproducing part 23 extracts the control signal from the demodulated analog sound signal. As the extracting method for the control signal, a clamp circuit, which reference voltage follows up an analog sound signal waveform, is used, for example. Thus, any special channel, transmission line accompanying this channel or code/decode circuit is not required for transmitting the control signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control signal transmitting method suitable for transmitting a voice signal through a satellite line, and a transmitter and a receiver used for the transmission.

[0002]

2. Description of the Related Art A television receiver or a video tape recording / reproducing apparatus (hereinafter referred to as V) installed on a side receiving a video signal and an audio signal transmitted as a television broadcast signal or the like.
(Referred to as TR), when receiving and recording the transmitted video signal and audio signal, the control signal transmitted from the transmitting side such as a broadcasting station automatically starts image reception and recording. A system has been proposed.

As a conventional method of transmitting such a control signal, a control channel prepared separately from a transmission channel of a video signal and an audio signal is used to transmit a coded control signal, or communication is performed. When a voice signal is converted to digital data and transmitted as is practically used for transmission on a satellite line using a satellite (broadcast satellite), the coded control is performed with a subcode added to this voice digital data. It is considered to transmit a signal.

[0004]

However, when the control channel is prepared for transmitting the control signal, the transmitting side needs a transmitting circuit for the control channel for transmitting and the receiving side needs the control channel for transmitting the control channel. Since a receiving circuit is required, both the transmitting side and the receiving side are complicated in structure.

When a coded control signal is added to a subcode added to audio digital data for transmission, a subcode processing circuit for adding a control signal as a subcode on the transmitting side is provided. As needed
The receiving side needs a discriminating circuit for discriminating the content of the sub-code, which again has a disadvantage that the configurations of the transmitting side and the receiving side are complicated.

In view of the above point, the present invention has an object to easily transmit a control signal together with a video signal, an audio signal and the like.

[0007]

A control signal transmission method of the present invention is a transmission method in which an audio signal is transmitted together with a video signal from a transmission side to a reception side by a line or the like via a communication satellite. After inserting the control signal of the equipment into the analog audio signal, this analog audio signal is modulated by the audio signal modulation method determined by the line and transmitted, and the analog audio signal transmitted on the receiving side is demodulated and then this demodulation The control signal is extracted from the signal.

The transmitting apparatus of the present invention is, for example, as shown in FIG. 1, provided with a predetermined control signal generating means 13, a supply source 1 of a video signal and an analog audio signal to be transmitted, and the supply source 1. Inserting means 12 for inserting the control signal output from the generating means 13 into the analog audio signal, and modulating means 11 for modulating the analog audio signal in which the control signal is inserted by the video signal and the inserting means for a predetermined communication line.
And a sending means 14 for sending the video signal and the audio signal modulated by the modulating means 11 to the line.

Further, in this case, a video and audio recording / reproducing means for recording the analog audio signal and the video signal into which the control signal output from the inserting means is inserted are prepared, and the video and audio recording / reproducing means reproduces the video and audio. The analog audio signal and the video signal are modulated by the modulation means, and are sent to the line by the sending means.

Further, the receiving apparatus of the present invention, as shown in FIG. 1, for example, receives a voice signal transmitted by a predetermined communication line 22, and demodulates the voice signal received by the receiving unit 22 to obtain an analog voice. It is provided with a demodulating means 22 for converting into a signal, and an extracting means 23 for extracting a control signal inserted in the analog audio signal obtained by demodulating by the demodulating means 22.

In this case, the control signal extracted by the extracting means is converted into an infrared signal for remote control, and the infrared signal is wirelessly transmitted to the controlled device.

Further, the receiving device controls the start or stop of image reception of a television receiver for performing image reception processing of a video signal and an audio signal transmitted through a line by a control signal.

Further, on the receiving device side, control of recording start or recording stop of the recording device for recording the video signal and the audio signal transmitted through the line is controlled by the control signal.

[0014]

According to the control signal transmission method of the present invention, since the control signal is inserted into the analog audio signal for transmission, the control signal can be transmitted without preparing a channel for transmitting the control signal. The control signal can be transmitted without any change in the voice signal transmission line used in the above.

Further, according to the transmitter of the present invention, the control signal can be transmitted only by providing the structure for inserting the control signal into the analog audio signal, and the control signal can be transmitted with a simple structure.

In this case, a video and audio recording / reproducing means for recording the analog audio signal in which the control signal output by the inserting means is inserted and the video signal are prepared, and the analog audio reproduced by the video and audio recording / reproducing means is prepared. By modulating the signal and the video signal with the modulation means and sending them to the line with the sending means,
The control signal can be automatically transmitted only by reproducing the signal previously recorded in the video / audio recording / reproducing means.

Further, according to the receiving apparatus of the present invention, the control signal can be reproduced only by extracting a predetermined component from the analog voice signal received and demodulated, and the control signal can be received with a simple structure.

In this case, the control signal extracted by the extracting means is converted into an infrared signal for remote control, and the infrared signal is wirelessly transmitted to the controlled device, whereby remote control can be performed by receiving the infrared signal. It is possible to easily control the controlled device based on the received control signal.

Further, the receiving apparatus controls the start or stop of image reception of the television receiver for performing image reception processing of the video signal and the audio signal transmitted through the line by the control signal, thereby automatically controlling the television. It is possible to easily control the start or stop of image reception of the John receiver.

Furthermore, by controlling the recording start or the recording stop of the recording device for recording the video signal and the audio signal transmitted by the line by the control signal on the receiving device side, the recording by the automatic recording device is performed. It is easy to control the start or stop of recording.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

This example is applied to a transmission / reception system using a transmission line of a television signal using a communication satellite, and is constructed as shown in FIG. In FIG.
Reference numeral 10 denotes a transmitter, and the transmitter 10 has a VTR1.
Are supplied to the transmitter 10 to supply the video signal V and the audio signal A reproduced from the video tape mounted on the VTR 1. In this case, the video signal V supplied to the transmitter 10
The audio signal A is an analog signal (the recording form in the VTR 1 may be analog recording or digital recording).

The transmitter 10 is a transmitter for a satellite line transmitted via a communication satellite and supplies the analog video signal V supplied from the VTR 1 to the modulator 11.
In addition to performing the satellite line modulation process, the analog voice signal A supplied from the VTR 1 is supplied to the modulator 11 via the mixer 12 to perform the satellite line modulation process. As the modulation processing in the modulator 11, the analog video signal is frequency-modulated by the main carrier. Then, after the analog audio signal is converted into a digital audio signal of a predetermined format, the digital audio signal is subjected to digital modulation such as 4-phase DPSK modulation at the subcarrier frequency and superposed on the modulated video signal. .

Then, the video signal, which is modulated by the modulation unit 11 and on which the audio signal is superimposed, is supplied to the transmission unit 14, and is transmitted from the parabolic antenna 16 to the communication satellite 2 as a signal of a predetermined transmission channel (eg, 14 GHz band). Send (the communication satellites here include broadcast satellites).

In this example, the control signal output from the control signal generator 13 is inserted into the analog audio signal supplied from the VTR 1 to the modulator 11, and the analog audio signal is transmitted together with the audio signal. That is, the control signal output from the control signal generator 13 is supplied to the mixer 12, and the control signal is inserted into the analog audio signal supplied to the modulator 11. The control signal output from the control signal generator 13 is generated according to the operation of the operation unit 15 of the transmission device 10, and the control signal insertion processing is a method of superimposing the control signal on the analog audio signal. There is a method of temporarily switching the control signal from the analog audio signal.

The respective processing methods will be described. When superimposing a control signal on an analog audio signal,
As shown in FIG. 2, the mixer 12 has a VTR1
The analog audio signal output from the control signal generator 13 is supplied to the modulator 11 side via the resistor R _1.
The control signal output from the capacitor C ₁ and the resistor R
_It is supplied to the modulator 11 side through a series circuit with ₂ . With this configuration, a signal in which the control signal waveform is superimposed on the analog audio signal waveform is supplied to the modulator 11.

When the analog voice signal is temporarily switched to the control signal, the mixer 1 is used as shown in FIG.
As the structure of No. 2, the changeover switch 17 is prepared, and the VTR1
The analog voice signal output from the
To the first fixed contact 17a. Further, the control signal output from the control signal generator 13 is changed to the changeover switch 17
To the second fixed contact 17b. The control signal obtained at the movable contact 17m of the changeover switch 17 is
The analog audio signal input section of the modulator 11 is supplied.

The structure of the control signal output from the control signal generator 13 will be described below. In this example, the control signal is formed by a pulse train having a frame structure as shown in FIG. In this case, the pulse arrangement state is changed according to the content of the control signal to be transmitted to form a control signal for one frame, and only one frame is transmitted or several frames are repeatedly transmitted.

Then, here, as the control signal, a signal for controlling either start or stop of image reception of the television receiver or start or stop of recording of the VTR is transmitted. Each control signal is, for example, a pulse train signal having a configuration according to the pulse train of an infrared signal capable of remotely controlling each device (television receiver, VTR) to each control state described above. Then, such a control signal is inserted into the analog audio signal before transmission of the program starts and at the end of the program based on the operation of the operation unit 15 to be transmitted.

Next, the transmitter 1 relayed by the communication satellite 2
Explaining the configuration of the receiving side of the transmission signal from 0,
As shown in FIG. 1, a parabolic antenna 21 connected to a receiving device 20 receives a signal transmitted from a communication satellite 2 in a downlink of a predetermined frequency band (for example, 12 GHz band),
A converter (not shown) attached to the parabolic antenna 21 converts the first intermediate frequency signal into a first intermediate frequency signal and supplies the first intermediate frequency signal to the receiving unit 22 in the receiving device 20.
The receiving unit 22 receives and demodulates the first intermediate frequency signal transmitted from the parabolic antenna antenna 22. As the receiving process here, a receiving process for extracting a transmission signal of a predetermined transmission channel is performed. Then, from the extracted transmission signal, demodulation processing of the analog video signal frequency-modulated on the transmission side to the baseband signal is performed, and the digital audio signal superimposed on the demodulated video signal at the subcarrier frequency is extracted. Then, demodulation processing for converting into an analog audio signal is performed.

Then, the analog video signal and analog audio signal demodulated by the receiver 22 are supplied to the television receiver 3 and the VTR 4 connected to the receiver 20.

The analog audio signal demodulated by the receiving section 22 is supplied to the control signal reproducing section 23. The control signal reproducing section 23 is a circuit for extracting the control signal inserted into the analog audio signal, and is configured as shown in FIG. 5, for example. That is, a process of supplying the analog audio signal output from the audio signal output unit of the receiving unit 22 to the clamp circuit 23b through the terminal 23a and extracting only the pulse train inserted in the audio signal waveform by the clamp circuit 23a. I do.
Then, the amplifier circuit 23 is provided at the subsequent stage of the clamp circuit 23a.
c is connected, the extracted pulse train is amplified, and the control signal of the pulse train of a predetermined signal level is taken out from the output terminal 23d. Here, from the terminal 23e to the clamp circuit 23a
And + 5V power is supplied to the amplifier circuit 23c, and the peak value of the control signal pulse output from the output terminal 23d is 5V.
And

The processing operation of the control signal reproducing section 23 is shown in the waveform diagram of FIG. 6. For example, when the analog audio signal waveform before the control signal is inserted on the transmitting side is in the state shown in A of FIG. As a result of the control signal being inserted (here, superposition processing) on the transmitting side, the pulse component is superposed on the analog audio signal as shown in FIG. 6B. Peak value of this inserted pulse component (peak-to-peak value)
Is, for example, 0.1V. Then, the control signal reproducing unit 2
In the clamp circuit 23b in 3, the pulse component having a peak value of 0.1 V superimposed on this analog audio signal (C in FIG. 6).
Only are extracted. Then, the pulse component is amplified by the amplifier circuit 23c, and a control signal of a predetermined potential (for example, 5 V) shown in D of FIG. 6 is obtained.

The control signal thus reproduced from the analog audio signal is supplied to the control section of the television receiver 3 and the control section of the VTR 4. Here, when the television receiver 3 and the VTR 4 are provided with control signal input terminals, the control signal output section of the receiving device 20 and the control signal input terminals of the television receivers 3 and VTR 4 are directly connected by signal lines. It suffices to connect and transmit the control signal by wire. If the control signal input terminal is not provided, the control signal is transmitted to the television receiver 3 and the VTR 4 as an infrared signal. That is, as shown in FIG. 7, the control signal reproduced by the control signal reproducing unit 23 is supplied to the control code converting unit 24, and if necessary, the control code is converted into a code for an infrared signal (conversion process is required). If it does not exist, the control code conversion unit 24 is not necessary), and the converted control signal is supplied to the infrared signal light emission unit 25. Then, the infrared signal emitting section 25 outputs a control signal as an infrared signal,
An infrared signal receiving unit (not shown) of the television receiver 3 and the VTR 4 is wirelessly transmitted.

By thus transmitting the infrared signal as the control signal, in the case of a television receiver or a VTR which can be remotely controlled by a remote control device (so-called remote controller) which outputs the infrared signal, the control signal is used. It can be controlled.

Since the control signal can be transmitted by configuring the transmitting side and the receiving side as described above, the video signal and the audio signal of a certain program are reproduced from the VTR 1 and the transmitting device 10
In the case of transmitting from the above, immediately before the video signal and the audio signal of this program are reproduced, a control signal for starting the image reception of the television receiver 3 connected to the receiving side is transmitted based on the operation of the operation unit 15. As a result, this program is automatically started to be received by the television receiver 3 on the receiving side, and the program transmitted by the satellite line can be surely viewed. Also, instead of the control signal for starting the image reception of the television receiver, recording (recording) on the VTR 4 is performed.
By transmitting the control signal for starting the operation based on the operation of the operation unit 15, this program is automatically recorded by the VTR 4 on the receiving side, and the program transmitted by the satellite line can be surely recorded. become.

When the program transmitted by this system ends, a control signal for stopping the image reception of the television receiver 3 connected to the receiving side is transmitted based on the operation of the operation unit 15. The reception of the program by the television receiver 3 on the receiving side is automatically stopped, and it is possible to prevent useless image reception processing in the television receiver while the program is not transmitted. Further, instead of the control signal for stopping the image reception of the television receiver, the control signal for stopping the recording in the VTR 4 is transmitted based on the operation of the operation unit 15, so that the program being transmitted is received when it is finished. Recording on the side VTR 4 is automatically stopped, and useless recording processing on the VTR can be prevented.

It should be noted that both the signal for controlling the television receiver 3 and the signal for controlling the VTR 4 are continuously transmitted so that the viewing on the television receiver and the recording on the VTR are performed at the same time. May be. Alternatively, the control signal transmitted from the transmission side may be a signal indicating the start of transmission of the program and a signal indicating the end of transmission, and a control signal according to the device connected on the reception side may be generated. For example, when a television receiver is connected, when a control signal indicating the start (or end) of program transmission is received, image reception of the television receiver is started (or image reception is stopped) within the receiving device. A control signal may be generated and transmitted to the television receiver.

As described above, according to the control signal transmitted in the system of this example, it is possible to remotely control the device installed on the receiving side from the transmitting side. In this case, since the control signal is transmitted by inserting it into the analog audio signal, there is no need for a dedicated control channel for transmitting the control signal or the process of adding control data to the digital audio signal as a subcode, which is simple. The control signal transmission processing can be performed with such a configuration, and the control signal can be easily transmitted using the existing satellite line. On the receiving side, the control signal can be reproduced from the demodulated analog audio signal by a circuit having a simple structure such as a clamp circuit, and the structure on the receiving side can be simplified. In addition, control by the received control signal,
By using an infrared signal, it becomes possible to easily control by using a remote control function provided in a device such as a television receiver or a VTR.

In the above-described embodiment, the transmission of the control signal by the transmission device 10 is performed based on the operation of the operation unit 15, but the time when the control signal is transmitted is reserved by the operation unit 15. As a result, the control signal may be automatically transmitted at the time when the program is transmitted and when the program ends.

Further, the V for sending the program prepared on the sending side
A control signal may be recorded in the TR in advance, and when the video signal and the audio signal of the program are reproduced from the VTR, the recorded control signal together with the audio signal may be automatically transmitted. FIG. 8 is a diagram showing a configuration in this case. In the figure, reference numeral 30 denotes a transmission device in this case, and the transmission device 30 has input terminals 31 and 32 of video signals and audio signals of a video program to be transmitted as a program. And a video signal of a video program obtained from another VTR from the terminal 31 to V
The video signal is supplied to the TR33 and recorded on the video tape by the VTR33, and the audio signal (analog audio signal) of the video program is output from the terminal 32 through the mixer 34 to the VT.
It is supplied to R33 and recorded on a video tape at the same time as the video signal.

Here, a control signal is supplied from the control signal generator 36 to the mixer 34 at a predetermined timing based on the operation of the operation section 35, and the mixer 34 controls the analog audio signal. Insert a signal (insert by superimposing or insert by temporary switching), and V
Record on TR33 with video tape. In this case, for example, immediately before the start of the video program to be transmitted as a program, a control signal indicating the start of image reception by the television receiver or the start of recording of the VTR is inserted and recorded on a video tape, and immediately after the end of this video program, It is preferable to insert a control signal indicating the stop of the image reception of the television receiver or the recording of the VTR to record on the video tape.

When the video program recorded in the VTR 33 is transmitted as a program, the VTR
The recorded video program is reproduced from 33, the reproduced video signal and audio signal are supplied to the modulator 37, and the modulation processing for the satellite line (that is, frequency modulation of the video signal and conversion of the audio signal into digital data and digital conversion) is performed. Modulation) is performed, and the modulated signal is transmitted from the parabolic antenna 39 to the communication satellite 2 as a signal of a predetermined transmission channel in the transmission unit 38.

The configuration of the receiving side is the same as that of the example shown in FIG.

According to the transmission system configured as described above, when the program is transmitted, the VTR 33 on the transmitting side simply reproduces the video program recorded on the video tape to automatically transmit the control signal and automatically the transmitting side. It becomes possible to control the equipment. That is, for example, the VTR3 on the transmitting side
It is assumed that a control signal indicating the start of image reception of the television receiver is inserted immediately before the start of recording the image program in 3 and a control signal indicating the stop of image reception of the television receiver is inserted immediately after the end of this image program. At this time, VT
On the video tape recorded in R33, signals are recorded in the state shown in FIG. 9, for example.

That is, for example, a video signal of a video program is recorded in a predetermined section (a hatched portion) of a track V1 which is sequentially formed diagonally, and two channels are formed in one end of a video tape in the longitudinal direction. The audio signal of the video program is recorded in a predetermined section of the audio tracks A1 and A2 (where shaded). Then, immediately before the start point of the recording section of the audio signal of the video program, the control signal C1 indicating the image reception start of the television receiver (or the VTR recording start, the program transmission start, etc.) is recorded. Immediately after the end of the recording section of the audio signal of the video program, a control signal C2 indicating that the television receiver stops image reception (or VTR recording stop, program transmission end, etc.) is recorded. Here, the same control signal is recorded at the same timing on both of the two audio channels prepared.

By recording on the video tape in this way, the control signal inserted in the audio signal is transmitted together with the audio signal by reproducing the video tape and performing the transmission processing. The transmitted control signal is extracted as in the case of example 1. In the case of this example, when sending the video program as a program, the VTR 33
It is only necessary to perform the operation of playing the videotape with, and it is not necessary to generate the control signal when sending the program, and it is not necessary to manage the output timing of the control signal when sending the program. When the signal is recorded, the control signal can be automatically transmitted without any operation for transmitting the control signal when the program is transmitted.

Although the VTR is used as a device for recording and reproducing a video program in each of the above-described embodiments, it is used by another video signal recording device or reproducing device such as a recording / reproducing device using a video disc. Of course you can.

Further, the modulation system for video signals and audio signals transmitted using a communication satellite is not limited to the above-mentioned system, and various modulation systems can be applied.

Further, in the above-described embodiment, only the control for starting and stopping the image reception of the television receiver and the control for starting and stopping the recording of the VTR are performed, but other control may be performed. For example, when the type of input to be received (recorded) by the television receiver (or VTR) is such that a signal from another tuner or the like is received (recorded), the input signal received by this system is selected. The input may be switched as described above. Further, various operations of devices other than the television receiver and the VTR may be controlled.

Further, although the control signal is transmitted through the line using the communication satellite in the above-mentioned embodiment, the present invention can be applied to the case where the control signal is transmitted using the terrestrial transmission line or another line such as a cable television. .

[0052]

According to the control signal transmission method of the present invention, since the control signal is inserted into the analog audio signal for transmission, the control signal can be transmitted without preparing a channel for control signal transmission. The effect is that the control signal can be transmitted without making any changes to the voice signal transmission line that has been conventionally used.

Further, according to the transmitting apparatus of the present invention, the control signal can be transmitted only by providing the structure for inserting the control signal into the analog audio signal, and the control signal can be transmitted with a simple structure.

In this case, a video and audio recording / reproducing means for recording the analog audio signal in which the control signal output by the inserting means is inserted and the video signal are prepared, and the analog audio reproduced by the video / audio recording / reproducing means is prepared. By modulating the signal and the video signal with the modulation means and sending them to the line with the sending means,
There is an effect that the control signal can be automatically transmitted only by reproducing the signal previously recorded in the video / audio recording / reproducing means.

Further, according to the receiving apparatus of the present invention, the control signal can be reproduced by only extracting a predetermined component from the analog voice signal received and demodulated, and the control signal can be received with a simple structure. Have.

In this case, the control signal extracted by the extracting means is converted into an infrared signal for remote control, and the infrared signal is wirelessly transmitted to the controlled device, whereby remote control can be performed by receiving the infrared signal. There is an effect that control of the controlled device can be easily performed based on the received control signal.

Further, the receiving device controls the start or stop of image reception of the television receiver for performing image reception processing of the video signal and the audio signal transmitted through the line by the control signal, thereby automatically controlling the television. This has the effect of easily controlling the start or stop of image reception of the John receiver.

Furthermore, by controlling the recording start or the recording stop of the recording device for recording the video signal and the audio signal transmitted by the line by the control signal on the receiving device side, the automatic recording by the recording device is performed. This has the effect of making it easy to control the start or stop of recording.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a configuration example of a control signal insertion unit of one embodiment.

FIG. 3 is a configuration diagram showing another configuration example of the control signal insertion unit of the embodiment.

FIG. 4 is an explanatory diagram showing a configuration of a control signal transmitted in one embodiment.

FIG. 5 is a circuit diagram showing a configuration of a control signal reproducing unit according to an embodiment.

FIG. 6 is a waveform diagram showing a control signal extraction state according to an embodiment.

FIG. 7 is a block diagram showing an example of control on the receiving side according to an embodiment.

FIG. 8 is a configuration diagram showing another embodiment of the present invention.

9 is an explanatory diagram showing a recording state of the sending tape according to the example of FIG. 8. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 VTR 2 Communication satellite 3 Television receiver 4 VTR 10 Transmitter 11 Modulator 12 Mixer 13 Control signal generator 14 Transmitter 15 Operating unit 20 Receiver 22 Receiver 23 Control signal reproducer 25 Infrared signal emitter 30 Transmit Device 31 Video signal input terminal 32 Audio signal input terminal

Claims (7)

[Claims] 1. A transmission method for transmitting an audio signal together with a video signal from a transmitting side to a receiving side through a predetermined line, wherein a control signal of a device installed on the receiving side is inserted into an analog audio signal, and then this analog audio signal is inserted. A control signal transmission method in which a signal is modulated by a voice signal modulation method determined by the above line and transmitted, and after demodulating an analog voice signal transmitted on the receiving side, a control signal is extracted from this demodulated signal. . 2. A predetermined control signal generating means, a supply source of a video signal and an analog audio signal to be transmitted, and a control signal output from the generating means is inserted into an analog audio signal supplied from the supply source. Inserting means, modulating means for modulating the video signal and the analog audio signal in which the control signal is inserted by the inserting means for a predetermined communication line, and the video signal and audio signal modulated by the modulating means on the line. A transmitting device comprising a transmitting means for transmitting. 3. An analog audio signal in which a control signal output by the inserting means is inserted and a video and audio recording / reproducing means for recording the video signal are prepared, and the analog audio reproduced by the video / audio recording / reproducing means. 3. The transmitting apparatus according to claim 2, wherein the signal and the video signal are modulated by the modulating means and are transmitted to the line by the transmitting means. 4. A receiving means for receiving a voice signal transmitted by a predetermined communication line, a demodulating means for demodulating a voice signal received by the receiving means to obtain an analog voice signal, and a demodulating means for demodulating the voice signal. A receiving device comprising: an extracting unit that extracts a control signal inserted into an analog audio signal. 5. The receiving device according to claim 4, wherein the control signal extracted by the extracting means is converted into an infrared signal for remote control, and the infrared signal is wirelessly transmitted to the controlled device. 6. A control signal for controlling start or stop of image reception of a television receiver for performing image reception processing of a video signal and an audio signal transmitted through the line, according to the control signal. Receiver. 7. The receiving device according to claim 4, wherein the control signal controls the recording start or recording stop of the recording device for recording the video signal and the audio signal transmitted through the line.