JPH0259547B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a playback device such as a disk player having a playback function, a recording and playback device such as a tape recorder having a playback function and a recording function, and amplifying the playback signals of both devices. Regarding a signal processing device equipped with an amplification control device that outputs a recording signal to a recording/playback device, each of the playback device and the recording/playback device and the amplification control device can be processed without digitally encoding the control signal. In addition to inexpensively reducing the number of control lines between The purpose is to enable automatic recording, prevent malfunctions in synchronous recording, and significantly improve operational performance.

Conventional audio equipment, which is an example of this type of signal processing device, includes an amplifier, which is an amplification control device, a disk player, a compact disk player (hereinafter referred to as a CD player), a tape recorder,
It is configured by connecting an input source device such as a tuner.

Note that input source devices such as a disk player, CD player, and tuner are playback devices that only have a playback function, and input source devices such as a tape recorder are recording and playback devices that have a playback function and a recording function.

Three control lines are provided between each input source device and the amplifier to operate the following three functions.

By the way, of the three functions mentioned above, the first function is that when each input source device enters an active state in which it outputs a reproduced audio signal, which is a reproduced signal, to the amplifier, the input mode of the amplifier changes to the input mode that has become active. This is a calling function that automatically switches to a mode that amplifies the playback audio signal of the source device.The second function is to switch the input source device other than the input source device that has become active to a stopped state or when the amplifier signal is input. This is an automatic stop function that automatically switches to a passive state.

In addition, the third function is when the recording/playback device records the audio signal of the playback device that has become active.
This is a synchronous recording function that automatically puts the recording and reproducing device into the recording state when the reproducing device becomes active, and automatically releases the recording and reproducing device from the recording state when the reproducing device becomes stopped or passive.

Additionally, a special operating switch is provided to activate the synchronous recording function described above.

Therefore, the conventional audio equipment requires three control lines between each input source equipment and the amplifier, which has the disadvantage of increasing the number of lines.

By the way, in order to reduce the number of control lines,
It is conceivable to digitally code the control signals transmitted via the control line, but this has the disadvantage of being expensive.

Furthermore, in order to activate the synchronous recording function, it is necessary to provide and operate a special operation switch, which has the disadvantage of complicating the operation.

Furthermore, when the playback audio signal of a playback device such as a disk player is synchronously recorded by a tape recorder that is a recording and playback device, conventionally, a control signal is formed by a switch linked to the arm operation of the disk player. The tape recorder is switched to the recording state and released from the recording state, but in this case, depending on the control method for the operation mode of the disk player and tape recorder, the synchronization operation is reversed and the arm is raised and the audio signal is output. When the tape recorder is stopped, the tape recorder enters the recording state, and when the arm is lowered and the output of the audio signal starts, the tape recorder may be released from the recording state, which may cause a malfunction during synchronous recording.

The present invention has been made with the above points in mind, and includes a playback device having a playback function, a recording/playback device having a playback function and a recording function, and a playback signal of each of the devices by switching the input mode. A signal processing device comprising: an amplification control device that amplifies and outputs a recording signal such as the playback signal to the recording and playback device; Between each of the amplification control equipment,
The first and second control lines are connected, and the reproduction start pulse control signal, whose trailing edge is located when the output of the reproduction signal starts, is transmitted to the reproduction device, and the output of the reproduction signal is stopped based on the mode switching operation of the device. a reproduction-side signal output means for outputting a reproduction stop pulse control signal whose leading edge is located at a certain time and a pulse width shorter than the reproduction start pulse control signal to the amplification control device via the first control line; and a reproduction side mode control means for forcibly switching the device to a stop mode by detecting the leading edge of the signal inputted through the line, the recording and reproducing device is provided with a mode control means for controlling the recording and reproducing device such that the leading edge of the reproduction signal is located at a position before the output of the reproduction signal starts. recording/reproducing side signal output means for outputting a reproduction pulse control signal to the amplification control equipment via the first control line; A recording/reproducing side first mode control means for forcibly switching the device to the stop mode by detecting the leading edge of the input signal; and by detecting the trailing edge of the reproduction start pulse control signal via the second control line. a pulse width discriminator for outputting a detection signal; and a recording/reproducing side second mode control means for switching the device to the recording mode by inputting the detection signal during a recording pause mode of the device, and The control device includes input mode switching means for switching the input mode according to the playback start pulse control signal and the playback pulse control signal, respectively, and the playback start pulse control signal and the playback stop pulse control signal are connected to the recording and playback device. and output the reproduction pulse control signal to the second control line connected to the reproduction device.
The present invention is a signal processing device characterized by comprising a control signal distribution means for outputting to a control line.

Therefore, according to the signal processing device of the present invention, two control lines, the first and second control lines, are provided between the playback device, the recording and playback device, and the amplification control device to perform the call function and automatic stop. function,
The synchronous recording function can be activated, and at this time,
Each control signal transmitted via both control lines is not digitally coded, and there is no need to provide a special switch for synchronous recording, so the number of control lines can be reduced at low cost. At the same time, the operational performance can be improved, and since there is no malfunction during synchronous recording, the operational performance can be significantly improved.

Next, the present invention will be explained in detail with reference to drawings showing one embodiment thereof.

As shown in FIG. 1, a first control line L is connected between a CD player 1, a disk player 2, which are playback devices, a tape recorder 3, which is a recording and playback device, and an amplifier 4, which is an amplification control device.
1a, L1b, L1c and the second control line L2a,
L2b and L2c are provided.

Further, a control line Lt is provided between the tuner 5 and the amplifier 4.

When a signal of logic 1 (hereinafter referred to as "1") is input to the input terminal INa connected to the second control line L2a in the active state, that is, the CD player 1 is in the playback mode, the CD player 1 receives the input terminal INa connected to the second control line L2a. The leading edge is detected by a mechanism controller 1a, which is a mode control means on the reproduction side, and the operation of the controller 1a forcibly switches to a stop state, that is, a stop mode.

The CD player 1 also has a pulse signal with a waveform that rises when the playback mode is set by the mode switching operation and falls when the output of the playback audio signal starts, that is, a pulse signal with a pulse width τ1 whose trailing edge is located when the output of the playback audio signal starts. a monostable multivibrator (hereinafter referred to as monomulti) 1b that generates a playback start pulse control signal; a pulse signal with a waveform that rises when the output of the playback audio signal is stopped when the CD player 1 is switched to a stop mode by a mode switching operation; That is, a monomulti 1c is provided which generates a reproduction stop pulse control signal whose leading edge is located when the output of the reproduced audio signal is stopped, and both monomultis 1b and 1c form reproduction side signal output means.

Note that the pulse width τ2 of the reproduction stop pulse control signal
is set shorter than the pulse width τ1 of the reproduction start pulse control signal, and the reproduction start pulse control signal and the reproduction stop pulse control signal are transmitted to the amplifier 4 via the output terminal OTa and the first control line L1a.

Next, when the disc player 2 is in the playback mode, when a signal of "1" is input to the input terminal INb connected to the second control line L2b, the leading edge of the signal is set to the playback mode control means. It is detected by a certain mechanism controller 2a, and the operation of the controller 2a forcibly switches to the stop mode.

The disk player 2 also includes an operation switch unit 2b that includes an auto-operation start switch and a stop switch, and a switch that outputs a switch control signal based on a logical operation between a pulse at an input terminal INb and a switch pulse from the operation switch unit 2b. A control pulse generation switch 2d is provided between the control unit 2c and the output terminal OTb connected to the power terminal +B and the first control line L1b, and is controlled to open and close by the switch control signal, The switch control section 2c and the switch 2d form reproduction side signal output means.

The switch 2d is closed during the lead-in period of the arm when the start switch is turned on, and is opened immediately after the cartridge connected to the arm contacts the record. Furthermore, the switch 2d is closed when the start switch is turned on, and the switch 2d is opened immediately after the cartridge connected to the arm comes into contact with the record. Furthermore, when the stop switch is turned on or the auto-stop is turned on, the cartridge is closed when the record is recorded. It is closed immediately before leaving the panel, and is opened after a predetermined period of time after the closing.

Therefore, from the output terminal OTb of the disk player 2 to the amplifier 4, a pulse signal with a waveform that rises depending on the playback mode setting and falls when outputting the playback audio signal starts, that is, a playback start pulse control signal with a pulse width τ1 similar to that described above. , and a reproduction stop pulse control signal having a pulse width τ2 similar to that described above, whose leading edge is located when the output of the reproduced audio signal is stopped.

Note that 2e is an impedance matching resistor provided between the output terminal OTb and the ground point.

Furthermore, the tape recorder 3 is provided with a mechanism controller 3a, and the controller 3a includes:
During the stop input terminal Ia, which switches to stop mode by inputting a signal of "1", the recording input terminal Ib, which switches to recording mode by inputting a signal of "1", and the playback mode, the leading edge of the playback audio signal is A playback output terminal Oa, which outputs a playback control signal, is located at
It is provided with a recording output terminal Ob that outputs a recording control signal of "1" during the recording mode, and a recording pause output terminal Oc that outputs a recording pause control signal of "1" during the recording pause mode.

Then, the reproduction control signal is input to the monomulti 3b, and the reproduction pulse control signal whose leading edge is located before the start of output of the reproduction audio signal is sent from the monomulti 3b to the amplifier 4 via the output terminal OTc and the first control line L1c. At the same time, the reproduction control signal and the recording control signal are outputted to one input terminal of the AND gate 3d via the OR gate 3c.

Moreover, the other input terminal of the AND gate 3d is
It is connected to the second control line L2c via the input terminal INc, and when a "1" signal is input to the input terminal INc during playback mode or recording mode, a "1" signal is input from the AND gate 3d to the stop input terminal Ia. ” is output, and the leading edge of the signal is detected to switch to the stop mode.

Further, the disc player 3 is provided with a pulse width discrimination means consisting of a pulse width discrimination circuit 3e and a monomulti 3f, and of the signals inputted to the input terminal INc, only the signal with a pulse width τ1 is detected by the pulse discrimination circuit 3e. The monomulti 3f outputs a detection signal of "1" by detecting the trailing edge of the signal with a pulse width τ1.

Then, when the recording pause display signal and the detection signal from the recording pause output terminal Oc are input to the AND gate 3g, a recording command signal of "1" is output from the AND gate 3g to the recording input terminal Ib, and by this signal,
Switches to recording mode.

Note that the pulse width discrimination circuit 3e has an input terminal INc.
The signal is set not to be output when the pulse width of the signal is shorter than the pulse width τ3 set by τ1>τ3>τ2.

Also, mechanism controller 3a, monomulti 3b, or gate 3c, and gate 3d
The recording/reproducing side first mode control means is constituted by a mechanism controller 3a, a pulse width discrimination circuit 3e, a monomulti 3f, and an AND gate 3.
g constitutes a recording/reproducing side second mode control means.

Further, the tuner 5 is provided with a monomulti 5a that receives broadcasting by operating a channel selection switch or a selection dial, and outputs a reproduction pulse control signal with a pulse width τ2' when a reproduction audio signal is output. The reproduction pulse control signal of the monomulti 5a is
Amplifier 4 via output terminal OTd and control line Lt
is output to.

On the other hand, the amplifier 4 is provided with a function controller 4a as input mode switching means,
The controller 4a has a first control line L1a~
CD player terminal Iw and disk player terminal connected to L1c and control line Lt, respectively
Ix, a tape recorder terminal Iy, and a tuner terminal Iz are provided, and when a playback start pulse control signal is input to each of the terminals Iw and Ix, the input mode of the amplifier 4 is set to the playback audio of the CD player 1 and disc player 2. When the mode is switched to signal amplification mode and the reproduction pulse control signal is input to terminals Iy and Iz, the input mode of amplifier 4 is as follows.
The tape recorder 3 and tuner 5 each switch to a mode in which the reproduced audio signals are amplified.

Also, from the CD player 1 to the first control line L1
The playback start pulse control signal and the playback stop pulse control signal output to the amplifier 4 via the second control line L2b, L2c are connected to the disk player 2 and tape recorder 3 via diodes 4b, 4c, respectively. is output to
The playback start pulse control signal and playback stop pulse control signal outputted from the disc player 2 to the amplifier 4 via the first control line L1b are connected to the CD player 1 and tape recorder 3 through diodes 4d and 4e, respectively. second
The reproduction pulse control signal outputted to the control lines L2a and L2c and outputted from the tape recorder 3 to the amplifier 4 via the first control line L1c is transmitted to the CD player 1 via diodes 4f and 4g, respectively.
The reproduction pulse control signal outputted to the second control lines L2a, L2b connected to the disc player 2 and the amplifier 4 via the control line Lt of the tuner 5 is transmitted to the diode 4h,
Second control lines L2a, L2b, connected to the CD player 1, disk player 2, and tape recorder 3 via 4i and 4j, respectively;
Output to L2c.

That is, the amplifier 4 is provided with control signal distribution means for diodes 4b to 4j.

Therefore, the operation when the call function and stop function are activated is as shown in FIG.

First, when the start switch of the disc player 2 is operated, the switch 2d is closed, a reproduction start pulse control signal is output from the first control line L1b to the amplifier 4, and the input mode of the amplifier 4 is switched to the mode of the disc player 2. At the same time, the reproduction start pulse control signal is transferred to the second control line L2.
The signal is transmitted to the CD player 1 and the tape recorder 3 through the L2c and L2c, respectively, and the CD player 1 and the tape recorder 3 are controlled to the stop mode by the operation of the controllers 1a and 3a of the CD player 1 and the tape recorder 3. It is assumed that the tape recorder 3 is set to playback mode or recording mode.

That is, the reproduction start pulse control signal of the disk player 2 acts as an input mode switching signal of the amplifier 4 and a stop control signal of the CD player 1 and tape recorder 3, and
When the CD player 1 and the tape recorder 3 enter the playback mode, the CD player 1 and the tape recorder 3 are automatically controlled to the stop mode before the playback audio signal is output from the disk player 2.

Next, when the start switch (not shown) of the CD player 1 is operated, the reproduction start pulse control signal of the monomulti 1b is transmitted to the first control line L1a.
is output to the amplifier 4, and the input mode of the amplifier 4 is switched to the mode of the CD player 1.
The reproduction start pulse control signal is on the second control line L.
2b and L2c respectively to the disk player 2 and tape recorder 3,
By the operations of the controllers 2a and 3a of the disk player 2 and tape recorder 3, the disk player 2 is switched from the playback mode to the stop mode, and the tape recorder 3 is continuously maintained in the stop mode. In addition, tape recorder 3
If the tape recorder 3 is in the recording mode or the playback mode, the tape recorder 3 is also controlled to be in the stop mode.

That is, the playback start pulse control signal of the CD player 1 acts as an input mode switching signal for the amplifier 4 and a stop control signal for the disk player 2 and tape recorder 3. When the CD player 1 enters the playback mode, the playback start pulse control signal acts as an input mode switching signal for the amplifier 4 and a stop control signal for the disk player 2 and tape recorder 3. The tape recorder 3 is controlled to a stop mode before the CD player 1 outputs the reproduced audio signal.

Next, when the play switch (not shown) of the tape recorder 3 is operated, the playback pulse control signal of the playback output terminal Oa of the controller 3a is output from the first control line L1c to the amplifier 4, and the input mode of the amplifier 4 is set to tape. At the same time as switching to the mode of the recorder 3, the reproduction pulse control signal is
via the second control lines L2a and L2b, respectively.
The data is transmitted to the CD player 1 and the disc player 2, respectively, and by the operation of the controllers 1a and 2a of the CD player 1 and the disc player 2, the CD player 1 is switched to the stop mode, and the disc player 2 is kept in the stop mode. . Note that if the disc player 2 is in the playback mode, the disc player 2 is also switched to the stop mode.

That is, the reproduction pulse control signal of the tape recorder 3 acts as an input mode switching signal of the amplifier 4 and a stop control signal of the CD player 1 and disk player 2. When the tape recorder 3 enters the reproduction mode, the CD player 1, The disk player 2 is controlled to a stop mode before the tape recorder 3 outputs the reproduced audio signal.

Furthermore, when the tuner 5 is set to broadcast reception mode, the reproduction pulse control signal of the tuner 5 is output to the amplifier 4 via the control line Lt,
At the same time, the input mode of the tuner 5 is switched to the mode of the tuner 5, and the reproduction pulse control signal is transmitted via the second control lines L2a, L2b, and L2c, respectively.
It is transmitted to each of CD player 1, disk player 2, and tape recorder 3, and each controller 1
By the operations of a, 2a, and 3a, the tape recorder 3
At the same time, the CD player 1 and the disk player 2 continue to be held in the stop mode. Note that if the CD player 1 and the disc player 2 are in the playback mode, the CD player 1 and the disc player 2 are also each switched to the stop mode.

That is, the playback pulse control signal of the tuner 5 acts as an input mode switching signal for the amplifier 4 and a stop control signal for the CD player 1, disk player 2, and tape recorder 3, and the tuner 5 outputs a playback audio signal. Before, CD
Player 1, disk player 2, and tape recorder 3 are controlled to stop mode.

By the way, when the record switch (not shown) of the tape recorder 3 is operated to switch the tape recorder 3 to the recording mode, in this case, the reproduction pulse control signal is not output, so the CD player 1,
The modes of the disk player 2 and amplifier 3 do not change.

However, if you switch the tape recorder 3 to automatic song selection mode or switch the tuner 5 to reception frequency scan mode, the tape recorder 3
Since the tuner 5 automatically switches from the automatic song selection mode to the playback mode, a playback pulse control signal is output at this time, and the tuner 5 automatically switches from the scan mode described above to the broadcast reception mode. At this time, even if the reproduction pulse control signal is output and the tape recorder 3 is switched to automatic music selection mode or the tuner 5 is switched to reception frequency scan mode, the calling function and automatic stop function will work.

Note that in FIG. 2, diagonal lines indicate indeterminacy, and → indicates no change from the previous state.

Next, the operation when the synchronous recording function is activated is as shown in FIG.

By the way, when using the synchronous recording function, set the tape recorder 3 to recording pause mode in advance,
A recording pause control signal is output to the AND gate 3g.

Then, after setting the tape recorder 3 to the recording pause mode, when the start switch of a device to be synchronously recorded, such as the disk player 2, is operated, a playback start pulse control signal is sent from the first control line L1b to the amplifier 4, as described above. The input mode of the amplifier 4 is switched to the mode of the disk player 2, and the reproduction start pulse control signal is transmitted to the CD player 1 and the tape recorder 3 via the second control lines L2a and L2c, respectively.
is transmitted, and the CD player 1 switches to stop mode.

However, since the tape recorder 3 is in the recording pause mode, the AND gate 3d does not output a stop command signal, and the tape recorder 3 does not switch to the stop mode.

On the other hand, since the pulse width τ1 of the reproduction start pulse control signal is longer than the pulse width τ3, the reproduction start pulse control signal is output from the pulse width discrimination circuit 3e to the monomulti 3f, and a detection signal is sent from the monomulti 6f to the AND gate 3g. output, and gate 3
A recording command signal is output from g to the recording input terminal Ib, and the tape recorder 3 is switched to recording mode.

That is, when the tape recorder 3 is set to recording pause mode, the disk player 2
The playback start pulse control signal acts as a synchronous recording start control signal, and the tape recorder 3 is controlled to the recording mode immediately after the cartridge of the disk player 2 contacts the record, and the playback audio signal of the disk player 2 is controlled. are synchronously recorded on the tape recorder 3.

Next, when the disk player 2 is switched from the playback mode to the stop mode by turning on the stop switch or by an auto-stop operation, a playback stop pulse control signal is output from the first control line L1b to the amplifier 4, and at the same time, the second control line L2
The playback stop pulse control signal is transmitted to the CD player 1 and the tape recorder 3 via L2c and L2c.

Since the tape recorder 3 is in the recording mode at this time, a stop command signal is output from the AND gate 3d, the tape recorder 3 is switched to the stop mode, and the synchronous recording ends.

That is, the reproduction stop pulse control signal outputted from the disk player 2 after the synchronous recording function operates acts as a synchronous recording end control signal.

Similarly, when the start switch of the CD player 1 is operated after setting the tape recorder 3 to the recording pause mode, a playback start pulse control signal is output from the first control line L1a, so the tape recorder 3 is switched to the recording mode. Instead, the reproduced audio signal of the CD player 1 is synchronously recorded on the tape recorder.

That is, when the tape recorder 3 is set to the recording pause mode, the reproduction start pulse control signal of the CD player 1 also acts as a synchronous recording start control signal.

Furthermore, when the CD player 1 switches from the playback mode to the stop mode due to an auto-stop operation of the CD player 1 after the synchronous recording function has worked, a playback stop pulse control signal is output from the first control line L1a. The recorder 3 switches from the recording mode to the stop mode and ends the synchronous recording.

That is, the reproduction stop pulse control signal outputted from the CD player 1 after the synchronous recording function is activated also acts as a synchronous recording end control signal.

Next, after setting the tape recorder 3 to recording pause mode, when turning on the power to the tuner 5 that does not need to be synchronously recorded, the tuner 5 enters the so-called on state, and at this time, the control line
A reproduction pulse control signal is output from Lt to the amplifier 4, and the input mode of the amplifier 4 becomes the tuner 5 mode, but the pulse width τ of the reproduction pulse control signal
2' is shorter than the pulse width τ3, the tape recorder 3 maintains the recording pause mode and does not malfunction.

Further, for example, if the tape recorder 3 is switched to the recording mode after the disk player 2 is set to the playback mode, the playback audio signal of the disk player 2 is recorded by the normal recording operation of the tape recorder 3, and the playback audio signal of the disk player 2 is recorded. When a reproduction stop pulse control signal is output from the disk player 2 due to an arm raising operation based on an auto-stop operation or the like, the tape recorder 3 is switched to a stop mode by the reproduction stop pulse control signal.

Further, for example, when the tape recorder 3 is switched to the recording pause mode after the disk player 2 is set to the playback mode, the disk player 2 sends a playback stop pulse control signal by raising the arm based on the auto-stop operation of the disk player 2. Even if the playback stop pulse control signal causes the tape recorder 3 to switch to the recording mode, the tape recorder 3 maintains the recording pause mode and does not malfunction.

That is, malfunction of the tape recorder 3 when synchronous recording is not performed by the tape recorder 3 is prevented.

Therefore, according to the embodiment, the control signals transmitted from the CD player 1, disc player 2, and tape recorder 3 to the amplifier 4 are transmitted via the first control lines L1a, L1b, and L1c, and the control signals from the amplifier 4 to the CD Player 1, disk player 2,
The control signal transmitted to the tape recorder 3 is transmitted via the second control lines L2a, L2b, and L2c, and the number of control lines between each of the CD player 1, disc player 2, and tape recorder 3 and the amplifier is 2. The calling function, automatic stop function, and synchronous recording function can be activated by reducing the number of control lines L1a to L1c and L2a to
Since each recording signal transmitted via L2c is not digitally encoded, the cost can be reduced.

In addition, since there is no need to provide a special control switch when activating the synchronous recording function, operational performance is improved, and there is logic to determine when the synchronous recording function should be activated and when it is not necessary to activate it. Operation performance can be further improved by making a distinction based on the circuit and activating the synchronous recording function only when it is necessary.

Furthermore, the tape recorder 3 starts synchronous recording based on the pulse width τ1 of the reproduction start pulse control signal and the pulse width τ2 of the reproduction stop pulse control signal output from each of the CD player 1 and disk player 2, which are to be synchronously recorded. Since the synchronous recording function determines when the synchronous recording function is activated, there is no malfunction, and operational performance can be further improved.

Further, when the synchronous recording function is activated, there is no time delay in the operations of the CD player 1, the disk player 2, and the tape recorder 3, and reliable synchronous recording can be performed.

In the above embodiment, the CD player 1 and the disk player 2 are used as playback devices, and the tape recorder 3 is used as the recording and playback device, and the playback signal is a playback audio signal. Of course, it is also possible to use a video tape recorder as the recording/reproducing device and convert the reproduced signal into a reproduced video signal.

[Brief explanation of drawings]

Fig. 1 is a block diagram of one embodiment of the signal processing device of the present invention, Fig. 2 is a timing chart when the call function and automatic stop function are activated, and Fig. 3 is a timing chart when the synchronous recording function is activated. be. 1...CD player, 2...disk player, 3
...tape recorder, 4...amplifier, 5...chuyuna,
1a, 2a, 3a...mechanism controller, 1
b, 1c, 3b, 3f, 5a...mono multi, 2b
...Operation switch, 2c...Switch control section, 2d...
Control pulse generation switch, 3c, 3d, 3g...
Gate, 3e... Pulse width discrimination circuit, 4a... Function controller, 4b-4j... Diode, L1a-L1c... First control line, L2a-
L2c...second control line.

Claims (1)

[Claims] 1 A playback device having a playback function, a recording and playback device having a playback function and a recording function, and by switching the input mode, the playback signals of both devices are amplified, and the recording and playback device is configured to record the playback signal, etc. In a signal processing device including an amplification control device that outputs a signal, a first control device and a second control device are provided between the playback device and the amplification control device and between the recording and playback device and the amplification control device, respectively. At the same time, the line is connected to the playback device, and the playback start pulse control signal is transmitted to the playback device, the trailing edge of which is located when outputting the playback signal starts, and the leading edge of the playback signal is located when the output of the playback signal is stopped based on a mode switching operation of the device. reproduction side signal output means for outputting a reproduction stop pulse control signal having a shorter pulse width than the reproduction start pulse control signal to the amplification control device via the first control line;
and a reproduction side mode control means for forcibly switching the device to a stop mode by detecting a leading edge of a signal inputted through a control line, the recording and reproducing device having a leading edge detected before the output of the reproduction signal starts. recording/reproducing side signal output means for outputting a positioning reproduction pulse control signal to the amplification control device via the first control line; recording/reproducing side first mode control means for forcibly switching the device to the stop mode by detecting a leading edge of a signal inputted through the second control line; and detecting a trailing edge of the reproduction start pulse control signal via the second control line. pulse width discrimination means for outputting a detection signal according to the above-described method; and recording/reproducing side second mode control means for switching the device to the recording mode by inputting the detection signal during the recording pause mode of the device; An input mode switching means for switching the input mode according to each of the reproduction start pulse control signal and the reproduction pulse control signal is connected to the amplification control device, and the reproduction start pulse control signal and the reproduction stop pulse control signal are connected to the recording and reproduction device. and output the reproduction pulse control signal to the second control line connected to the reproduction device.
A signal processing device comprising control signal distribution means for outputting to a control line.