JPH0240638Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an improvement of a video tape recorder.

[Prior art]

In a general video tape recorder, while a received television signal is being recorded and played back on a magnetic tape, there are cases where it is desired to check the content of the television image currently being received on the screen of a monitor receiver. On the other hand, connect the output terminal of an external video device such as a television camera or video disc player to the external video input terminal, and record this external video signal on a magnetic tape.
During playback, you may want to check the video content supplied from an external video device on the screen of the monitor receiver.

〔problem〕

However, in such cases, conventional general video tape recorders do not display the video content being received or the content of the video signal supplied to the external video input terminal on the monitor receiver screen when in recording mode or stop mode. Although it can be easily confirmed,
When in playback mode, the video signal played from the magnetic tape is normally output to the video output terminal, so first set it to stop mode and cancel playback mode, then check the received video or external video in this state. However, after a while, it was necessary to return to playback mode again. Therefore, in such a case, the operation is not only cumbersome, but also because each time the stop mode is set, the state changes from loading the tape onto the rotating drum to unloading, and then returns to the loading state. The disadvantage was that it took time to switch, and the played video would shift during this time.

[Purpose of invention]

The present invention has been devised in view of these points, and it is an object of the present invention to provide a video tape recorder that allows the user to easily check the video being received and the content of external video input on a monitor receiver even in playback mode. It is.

〔Example〕

The present invention will be explained below according to embodiments shown in the drawings.

In the drawing, 1 is a tuner, 2 is a channel selection device, and 3 is a tuner.
is an IF circuit, 4 is an audio circuit, 5 is a Y/C signal processing circuit, 6 is a recording/playback amplifier, 7 is an RF converter, 8 is a servo circuit, 9 is a power supply circuit, 10 is a mechanism control circuit, and 11 is a mechanism. Yes, 12 is eject button 12a, rewind button 1
2b, fast forward button 12c, play button 12d, record button 1
2e, a pause button 12f, and the like. Furthermore, 13 is a drum motor, 14 is a capstan motor, 15 is an audio head, 16,1
7 is a video head, 18, 19, and 20 are recording/playback switching heads, 21 and 22 are external input selector switches, 23 is an external audio input terminal, 24 is an audio output terminal, 25 is an external video input terminal, and 26 is a video output terminal. Terminal 27 is an RF output terminal, and these constitute a generally known video tape recorder.

Although the operation of the video tape recorder constructed from the above is well known, the recording and playback operations will be briefly explained. First, the recording button 12 of the operation section 12
When you press e, the recording/playback switch 1 is activated at that moment.
8, 19, and 20 are switched to the recording position, and the mechanism 11 is driven by a command from the mechanism control circuit 10 to enter the recording mode. Usually, at this time, the television signal of the channel selected by the channel selection device 2 is selectively received by the tuner 1, amplified and detected by the IF circuit 3, and then sent to the audio circuit via the changeover switches 21 and 22. 4
and is supplied to the Y/C signal processing circuit 5. The audio signal output from the audio circuit 4 is supplied to the audio head 15 via the recording/playback switch 18 and recorded on the audio track of the magnetic tape. In addition, the Y/C signal processed and outputted by the Y/C signal processing circuit 5 is sent to the recording/playback switch 1.
9, an amplifier 6, and a changeover switch 20, the signal is supplied to video heads 16 and 17 in order, and is thereby recorded on a video track on a magnetic tape. Note that external video input terminal 25 and external audio input terminal 23
If the output terminal of an external video device such as a TV camera is connected to the external input selector switch 2,
2 and 21 are automatically switched to the external input position, and at this time, the external video signal is supplied to the Y/C signal processing circuit 5 instead of the television received video signal, and the external audio signal is supplied to the audio circuit 4. In this case, video signals and audio signals supplied from external video equipment are recorded on the magnetic tape.

On the other hand, if you press the playback button 12d on the operation unit 12 again,
The recording/playback switch 18, 19, 20 is switched to the playback position, and the mechanism 11 is driven by a command from the mechanism control circuit 10 to enter the playback mode. In this case, the audio signal reproduced from the audio track on the magnetic tape by the audio head 15 is supplied to the audio circuit 4 via the changeover switch 18, where it is appropriately processed and output to the audio output terminal 24. At the same time, the reproduced video signal reproduced from the video track of the magnetic tape by the video heads 16 and 17 is transferred to the selector switch 2.
After the signal is applied to the recording/playback amplifier 6 via the input signal 0 and amplified there, it is further supplied to the Y/C signal processing circuit 5 via the changeover switch 19. After appropriate processing is performed here, the video output terminal 26
At the same time, the signal is converted to RF by the RF converter 7 and is output to the RF output terminal 27 as an RF output.

In the embodiment of the present invention, in the video tape recorder constructed and operated as described above, the operation section 12 is further provided with a monitor button 12g, and a monitor output changeover switch 28 which is switched in conjunction with the press of the monitor button 12g. Further, when the monitor button 12g is pressed, the mechanism 11 is driven to a temporary stop mode by a command from the mechanism control circuit 10.

Therefore, if the playback button 12d is pressed while the external video input terminal 25 is not connected to the output terminal of the external video device, that is, the external input selector switch 22 is in the TV reception position, the playback mode as described above is activated. The operation is as follows, and since the monitor output selector switch 28 is in the playback position shown in the figure,
The reproduced video signal obtained from the Y/C signal processing circuit 5 is transmitted to the video output terminal 26 via the changeover switch 28.
At the same time, the signal is RF converted by the RF converter 7 and is output from the RF output terminal 27. Therefore, in this case, the video output terminal 26 or the RF output terminal 2
If a monitor receiver is connected to 7, the video reproduced from the magnetic tape can be viewed on the monitor receiver.

In this way, if you are watching the tape playback video on the monitor receiver and temporarily want to watch the received television video, press the monitor button 12g as desired.
When you press , monitor output selector switch 2 is turned on at that moment.
8 is switched to the monitor position, and the mechanism 11 is put into a pause mode by a command from the mechanism control circuit 10. At this time, the television reception video signal obtained from the IF circuit 3 is sent to the video output terminal 26 via the changeover switches 22 and 28. The RF signal is output to the RF output terminal 27.
An output signal is derived from which the received television image can be viewed on a monitor receiver. After that, when the playback button 12d is pressed again, the monitor output changeover switch 28 is switched to the playback position and the mechanism 11 is returned to the playback mode, and at this time, the playback image of the magnetic tape can be viewed on the monitor receiver. In this case, while the monitor button 12g is pressed and the received television image is viewed on the monitor receiver, the mechanism 11 is in the pause mode, so the magnetic tape is loaded onto the rotating drum, and then the playback button 12d is pressed. At the same time, it will immediately return to playback mode and press the monitor button 12g.
It becomes possible to continue viewing the reproduced video immediately after pressing , without any shift.

On the other hand, when the output terminal of an external video device is connected to the external video input terminal 25 and the output terminal of the external video device is connected to the playback mode, and when viewing the reproduced video of the magnetic tape on the monitor receiver, if desired, press the monitor button 12g. At this time, mechanism 11 is operated in the same manner as described above.
becomes the pause mode, and in this case, the external video signal input to the external video input terminal 25 is transferred to the video output terminal 26 via the changeover switches 22 and 28.
and the RF output terminal 27
An RF output signal is derived, and in this case, the image currently being input from the external video device can be viewed on a monitor receiver.

〔effect〕

As described above, according to the video tape recorder of the present invention, a monitor switch is provided in the operation section, and when the monitor switch is turned on during the playback mode, the mechanism is switched to the pause mode and an external video input signal is sent instead of the playback video signal. Alternatively, since the received television video signal is output to the external video output terminal, you can check the television video being received or the external video input on the monitor receiver by simply turning on the monitor switch at any time during playback. Can be done. Also, during this time, the mechanism is in a pause mode and maintained in a tape loading state, so that when the mechanism returns to the playback mode afterwards, the playback image appears smoothly on the monitor receiver.

[Brief explanation of the drawing]

The drawing is a block diagram of an embodiment of the present invention. 10...mechanism control circuit, 11...
...Mechanism, 12...Operation unit, 12g...Monitor button, 25...External video input terminal, 26...Video output terminal, 27...RF output terminal, 28...Monitor output changeover switch.

Claims (1)

[Scope of utility model registration request] A monitor switch is provided in the operation section, and when the monitor switch is turned on during playback mode, the mechanism is switched to pause mode and an external video input signal or television received video signal is output to an external video output terminal in place of the playback video signal. A videotape recorder characterized by: