JPH0722795Y2 - Video tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A Industrial field B Outline of device C Conventional technology D Problem to be solved by device E Means for solving problems (Figs. 1 and 3) F Action (Figs. 1 and 3) ) G Example (FIGS. 1 to 3) H Effect of device A Industrial field of application The present invention relates to a video tape recorder (VTR), and is particularly applied to a VTR having an editing function.

B Outline of the invention In a VTR having an editing function, in response to an instruction to start or end editing by the editing operation means, recording / stopping control for an external video tape recorder and stop / stop release control for the contour correction means are performed. Therefore, it is intended to omit the frequency characteristic switching operation which the user has conventionally performed.

C Prior Art Generally, in a VTR, a reproduction signal reproduced from a recording tape is subjected to contour correction in a contour correction circuit and then output to the outside.

For this reason, conventionally, in a home-use VTR having an editing function, an edit switch is provided, and when the editing work is performed, the user manually operates the edit switch to stop the operation of the contour correction circuit. , As a result, it was designed to be edited by an external VTR without correcting the frequency characteristic of the reproduced signal.

D. Problems to be solved by the invention. However, in this way, the user always performs the predetermined editing operation after operating the edit switch (that is, the head of the VTR on the reproducing side) without fail when operating the edit switch. It is necessary to set to the playback paused state after setting out, set the external part to the beginning, set to the recording paused state, and then perform the playback / recording start operation). In addition to various editing operations, there was the problem that the edit switch had to be operated.

By the way, if you forget to operate the edit switch and perform editing work, if you play back the video signal edited by the external VTR, the contour will be double corrected and you will get only an extremely unnatural playback image. It will result in not being able to.

Especially in a home VTR, there is a high possibility that an unfamiliar user forgets the operation.

The present invention has been made in consideration of the above points, and is intended to propose a video tape recorder that can obtain the same function as when the edit switch is operated by performing a simpler editing operation. is there.

E Means for Solving the Problems In order to solve the above problems, in the present invention, a reproducing means 6 for reproducing a video signal recorded on a magnetic tape and outputting a reproduced video signal, and an instruction to start and end editing And the external video tape recorder 20 connected to the outside in synchronization with the start of the reproduction operation when the reproduction operation of the reproduction means 6 is started when the editing operation means 16i is instructed to start editing. The recording operation of the external video tape recorder 20 is stopped in synchronization with the stop of the reproducing operation when the recording operation of the recording medium is started and the end of the editing is instructed. In the video tape recorder 1 with an editing function, which has the editing control means 7, SP10, SP12 for controlling the operation of the video tape recorder 20, the frequency characteristics of the reproduced video signal The contour correction means 6 which emphasizes and outputs the reproduced video signal by emphasizing the output of the reproduced video signal, and when the editing operation means 16i instructs the start of editing, the operation of the contour correction means 6 is stopped and the end of editing is instructed. Occasionally, the contour control means 7, SP8 and SP13 for releasing the operation stop of the contour correction means 6 are provided.

When the edit operation means 16i is operated by the user, the edit control means 7, SP10, SP12 cause the reproduction means 6 of the video tape recorder 1 to start reproduction and the external video tape recorder 20 to start recording. At the same time, the contour control means 7, SP8 and SP13 prohibit the contour correction operation by the contour correction means 6. After that, the editing operation means can be changed again by the user.
When 16i is operated, the edit control means 7, SP10, SP12 cause the reproduction means 6 of the video tape recorder 1 to stop reproduction and the external video tape recorder 20 to stop recording, and the contour control means 7, SP8. , SP13 releases the prohibition of the contour correcting operation by the contour correcting means 6. Thus, the user only operates the editing operation means 16i in order to start or stop the edit recording of the video signal from the video tape recorder 1 to the external video tape recorder 20, and the contour correction operation by the contour correction means 6 is prohibited or Since the cancellation can be performed, the editing operation by the user can be further simplified.

G Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, 1 is a VTR to which the present invention is applied as a whole.
And has an editing function in addition to the normal recording / playback function.

The video circuit 2 includes a recording input circuit 4 that outputs a recording signal to a tape via a video head (not shown) in the recording mode based on a video signal input through the video terminal 3, and a video head in the reproduction mode. And a reproduction output circuit 6 for reproducing a recording signal obtained through the video output terminal 5 and outputting the video signal through the video output terminal 5, and a microcomputer 9 including a central processing unit (CPU) 7 and a memory 8. Based on the control signal DS1 output from the playback mode (for example, normal playback mode, double speed playback mode,
Slow playback mode) can be switched.

Further, the reproduction output circuit 6 changes the frequency characteristic according to the control signal DS1 and performs the edge correction in a state of the edit mode in which the contour correction is not performed (corresponding to a state in which the conventional edit switch is turned on) and the contour correction. The normal mode to be performed (corresponding to the edit switch off state) is switched.

Further, the audio circuit 10 switches the operation mode according to the control signal DS2 output from the microcomputer 9, and in the recording mode, records the audio signal obtained via the audio input terminal 11 on the magnetic tape, In the reproduction mode, the audio signal recorded on the magnetic tape is reproduced and output through the audio output terminal 12.

The tape drive control circuit 15 comprises a tape drive system and a drive system for a cylinder equipped with a video head, and switches the operation mode in accordance with a control signal DS3 output from the microcomputer 9.

The key operator 16 connected to the microcomputer 9 is
An operation including an operation switch 16i configured by an automatic reset type switch that is turned on in response to a user's pressing operation (called an ON operation) and is turned off if the pressing operation is stopped (called an OFF operation). It is a switch group.

With the above configuration, one VT without editing operation
When performing a normal recording / reproducing operation in R, for example, a video camera or a monitor is connected to the video input terminal 3, the video output terminal 5, the audio input terminal 11 and the audio output terminal 12.

Then, when the user turns on any of the mode switches 16a to 16h other than the edit control switch 16i of the key operation element 16 by the user, the normal recording and reproducing operation of outputting the contour-corrected video signal from the VTR 1 is performed.

When the recording switch 16a and the pause switch 16b of the key operator 16 are turned on at the same time from the stopped state of the VTR, the microcomputer 9 (this means that the user has set the VTR to the stopped state of recording). ),Control signal
Outputs DS1 to DS3, video circuit 2, audio circuit 10
Also, after the tape drive circuit 15 is set to the recording paused state, it waits for the pause release (when the pause switch 16b is pressed again).

When the pause is released, the microcomputer 9 enters the recording mode, outputs the control signals DS1 to DS3, and causes the video circuit 2, the audio circuit 10 and the tape drive circuit 15 to change from the recording pause state to the recording mode state. Set and recording starts.

Thus, the VTR 1 records the video signal and the audio signal input through the video input terminal 3 and the audio input terminal 11 on the magnetic tape.

When, for example, the normal reproduction mode switch 16c of the key operation element 16 is turned on in the above-described recording pause state, the microcomputer 9 outputs the control signals DS1 to DS3 without entering the recording mode, and thus the VTR1 is the normal one. Start the playback operation.

On the other hand, when the normal playback mode switch 16c and the pause switch 16b of the key operator 16 are simultaneously turned on from the VTR1 stopped state (this means that the user has set the VTR to the playback paused state). Then, the microcomputer 9 outputs the control signals DS1 to DS3 to set the video circuit 2, the audio circuit 10 and the tape drive circuit 15 to the state of the temporary stop in the normal reproduction mode.

When the pause switch 16b is pressed again in this state, the microcomputer 9 enters the reproduction mode and the control signals DS1 to D
S3 is output, the video circuit 2, the audio circuit 10 and the tape drive circuit 15 are set from the playback pause to the playback mode, and playback is started. Also, when 3x speed playback mode switch 16e, 2x speed playback mode switch 16f and slow motion playback mode switch 16g are pressed independently,
The microcomputer 9 is set in each reproduction mode, and variable speed reproduction is started.

On the other hand, when performing editing operation, VTR1 and external VTR2
Connection with 0 is made as shown in FIG.

Now, the playback video signal of the VTR1 has the same structure as the VTR1, and accordingly, the VT equipped with the video input terminal 22, the video output terminal 21, the audio input terminal 24 and the audio output terminal 23.
Consider editing and recording on the R20.

The control signal input / output terminals 17 and 25 of VTR1 and VTR20 are connected via the control bus 30, and the video output terminal 5 of VTR1 is VTR2.
0 is connected to the video input terminal 22 of VTR1, and the audio output terminal 12 of VTR1 is connected to the audio input terminal 24 of VTR20.

After the recorded tape to be edited is set in the VTR1 and is cued, the VTR1 is set to the playback pause state.

Also, after the tape to be recorded on the VTR20 is set and the recording position is cued, the recording is paused.

When the edit control switch 16i is turned on in this state, the CPU 7 of the microcomputer 9 enters the edit processing procedure SP1 shown in FIG. 2 and confirms that the edit control switch 16i is turned on again at step SP2. To do.

If a negative result is obtained here (this means that the edit control switch 16i has been momentarily turned on for some reason, not the user's operation to enter the editing work). ), CPU7 is step
From SP3, the process returns to the main routine (not shown) and returns to the state of waiting for the key operation of the key operation element 16 again.

On the other hand, if a positive result is obtained at step SP2 (this means that the user
i means ON operation), CPU7 step SP4
The variable speed playback mode switch 16e to 16g consisting of the 3x speed playback mode switch 16e, the 2x speed playback mode switch 16f and the slow motion playback mode switch 16g is used to perform the variable speed playback mode switch 16e.
It is judged whether or not e to 16g are turned on.

If a negative result is obtained here, the CPU 7 proceeds to step SP5 and determines whether or not the edit control switch 16i is in the off state.

If a negative result is obtained here (this means that the user's operation of turning on the edit control switch 16i is step SP2).
CPU7 returns to step SP4, and the variable speed playback mode switch 16e to 16g again.
It is determined whether or not is turned on.

Thus, by executing the loop of steps SP4-SP5-SP4, the CPU 7 sets VTR1 when the variable speed mode switches 16e to 16g are turned on, on condition that the edit control switch 16i is in the pressed state. It can be played in variable speed mode.

If a positive result is obtained in step SP5 (this means that the edit control switch 16i is turned on by the user's pressing operation continuously from step SP2, the variable speed reproduction mode switches 16e to 16f are turned on. It means that the control signal DS is released from the microcomputer 9 in step SP19.
Output 1 to DS3, playback output circuit 6, audio circuit 1
0, after setting the tape drive circuit 15 to the normal reproduction mode, the process proceeds to step SP8 to output the control signal DS1 and set the reproduction output circuit 6 to the edit mode.

Thus, the CPU 7 plays back the VTR 1 at the normal playback speed when the pressing operation of the edit control switch 16i is released without turning on the variable mode switches 16e to 16g.

Subsequently, the CPU 7 proceeds to step SP9 to output the control signal DS4, and in response to the output of the control signal DS4, the VTR2 connected to the control signal input / output terminal 17 in the recording pause state.
When the control signal DS4R output from 0 is input, the process proceeds to step SP10 to output the control signals DS1 to DS3,
Cancel the suspended state.

Thus, the VTR1 starts the reproduction operation in the normal reproduction mode set in step SP19 and in the edit mode set in step SP8 (thus without contour correction), and outputs the video output terminal 5 and audio output. A video signal and an audio signal are output via the terminal 12. As a result, the video signal output from the VTR 1 without contour correction can be edited and recorded on the external VTR 20.

On the other hand, when a positive result is obtained in step SP4 while executing the above-mentioned loop of SP4-SP5-SP4 (this means that one of the variable speed reproduction mode switches 16e to 16g is turned on). CPU 7 outputs the control signals DS1 to DS3 in response to the ON operation of, for example, the double speed reproduction mode switch 16f turned ON in step SP4, and outputs the reproduction output circuit. 6. The audio circuit 10 and the tape drive circuit 15 are set to the double speed reproduction mode in the pause state.

Then, in step SP7, the CPU 7 waits again for the edit control switch 16i to be turned off. When the edit control switch 16i is turned off, the CPU 7 goes to step SP8 and sets the reproduction output circuit 6 to the edit mode. The step
By executing SP9 and SP10, the video signal reproduced in the variable speed mode on the VTR1 is set to a state where it can be edited on the external VTR20.

In this state, the CPU 7 of the microcomputer 9 repeatedly performs the key scan operation of the edit control switch 16i until a positive result is obtained in step SP11, thereby the edit control switch 16i.
Waits for the user to turn it on.

Eventually, a positive result is obtained in step SP11 (this means that the first ON operation of the edit control switch 16i performed in step SP2 is once canceled and then the second ON operation is performed again. ),
The CPU 7 of the microcomputer moves to step SP12 and outputs the control signals DS1 to DS4, and stops the reproduction output circuit 4, the audio circuit 10 and the tape drive circuit 15 together with the external VTR 20 connected to the control signal input / output terminal 17. Put in a state.

Subsequently, the CPU 7 proceeds to step SP13 to output the control signal DS1 to temporarily release the edit mode of the reproduction output circuit 6 (thus, after releasing the prohibition of the contour correction operation), and then proceeds to step SP14. Enter the key scan loop of operator 16.

This key scan loop is a processing loop that allows the VTR1 and external VTR20 to remain in edit mode and start an edit operation in response to a new key operation.
After reading the key operation state of the key operation element 16 at
In step SP15, it is determined whether or not the edit control switch 16i has been turned on again, and if a negative result is obtained here, the process proceeds to step SP16.

When a negative result is obtained in step SP16 (this means that the edit control switch 16i and the stop switch 16h have not been turned on after the edit operation has been performed and the pause state has been reached), the CPU 7 Step SP
Moving to 18, if any of the mode switches other than the edit control switch 16i and the stop switch 16h has been turned on (this means, for example, the operation of changing the editing portion of the tape during the editing operation). ), And sets the control state according to the ON operation. For example, when the fast-forward switch 16d is turned on, the control signal DS3 is output to the tape drive circuit 15 to fast-forward the tape.

After that, the CPU7 returns to step SP14, and then step SP14-S
Repeatedly execute the key scan loop of P15-SP16-SP18-SP14.

While running this keyski loop, step
If a positive result is obtained at SP15 (this means that the edit control switch 16i was turned off at step SP6 and then turned on again for the third time),
The CPU 7 returns to step SP4 and again executes the key scan operation of the variable speed reproduction mode switches 16e to 16g.

Thus, the CPU 7 keeps the VTR 1 and the external VTR 20 in the edit mode and controls the video signal reproduced in the new variable speed mode so that the video signal can be continuously edited and recorded.

If a positive result is obtained at step SP16 while executing such a key scan loop SP14-SP15-SP16-SP18-SP14 (which means that the user has finished editing work), the CPU7 proceeds to the step. Return from SP17 to the main routine.

Thus, the VTR1 is a user editable control switch 16i
After pressing, you can simply press
In response to the operation, a reproduced video signal having a frequency characteristic that contour correction is not performed is recorded from the VTR 1 to the external VTR 20.

On the other hand, while the user keeps the edit control switch 16i on, the variable speed playback mode switches 16e to 16g
When one of them, for example, the double speed reproduction mode switch 16f is turned on, a reproduced video signal reproduced from the VTR1 in the double speed reproduction mode and not subjected to contour correction is recorded in the external VTR20.

To stop the recording / reproducing operation in the editing operation mode, the user may press the editing control switch 16i again.

It is also possible to set a new editing mode after the editing operation by the VTRs 1 and 20 is suspended.

Even in such a case, there is no problem that the user forgets to perform the canceling operation by automatically canceling the prohibition of the contour correction process.

According to the above configuration, the user can simply perform the ON operation and the OFF operation of the edit control switch 16i, and in response to this, the edit operation can be performed in the edit mode, thereby further simplifying the user operation. it can.

Therefore, in the above-described embodiment, the operation input by the variable speed reproduction mode switches 16e to 16g is accepted while the edit control switch 16i is turned on so that a new operator is not added. it can.

In the above embodiment, the VTR in the variable speed playback mode is used.
Regarding the case where the present invention is applied, the present invention is not limited to this, and can be applied to, for example, a VTR having only an editing function of only normal reproduction.

As described above, according to the present invention, in response to the operation of the editing operation means, in addition to the original editing operation, the edit mode for automatically prohibiting the contour correction is also set. This makes it possible to easily obtain a VTR that can further simplify the key operation during editing.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flow chart used for explaining the operation thereof, and FIG. 3 is a connection between VTRs when an editing operation is performed using the VTR according to the present invention. It is an approximate line figure shown. 1 ... VTR, 2 ... video circuit, 4 ... recording input circuit,
6 ... Playback output circuit, 9 ... Microcomputer, 10
…… Audio circuit, 15 …… Tape drive control circuit, 16…
… Key operators, 16i …… Edit control switches, 17
...... Control signal input / output terminal.

Claims (1)

[Scope of utility model registration request] 1. A reproducing means for reproducing a video signal recorded on a magnetic tape and outputting a reproduced video signal, an editing operation means for instructing start and end of editing, and an editing start instruction for instructing the editing start by the editing operation means. ,
The reproducing operation of the reproducing means is started, the recording operation of the external video tape recorder connected to the outside is started in synchronization with the start of the reproducing operation, and the reproducing operation of the reproducing means is instructed when the end of editing is instructed. Along with stopping
A video tape recorder with an editing function, comprising: edit control means for controlling the operation of the external video tape recorder so that the recording operation of the external video tape recorder is stopped in synchronization with the stop of the playback operation. A contour correction means for enhancing and outputting the reproduced video signal by enhancing the frequency characteristics of the signal, and the operation of the contour correction means is stopped when the editing operation means instructs to start the editing, and the editing is completed. And a contour control means for canceling the operation stop of the contour correction means when the instruction is given.