JP2537930B2 - Magnetic recording / reproducing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus that facilitates tape editing.

2. Description of the Related Art In recent years, magnetic recording / reproducing devices such as video tape recorders (hereinafter abbreviated as VTRs) have become popular in general households, and the number of opportunities for individuals to easily edit tapes and create works has increased. .

The simplest way to edit a tape is for humans to edit it in a timely manner. In other words, the VTR on the playback side is in the playback paused state (hereinafter abbreviated as play pause (PLAYPAUSE)) at the feed-out start position of the playback image, and the VTR on the editing side is temporarily recorded at the edit start position (hereafter, the rec pause (REC pause (REC
PAUSE) and abbreviated) state, and humans release the paused state of both VTRs at the right time to start editing, and at the editing end position, humans take time to stop the editing operation.

There is also a method of using a VTR remote control terminal, an example of which will be described with reference to the drawings.

FIG. 4 shows the connection at the time of editing the VTR using the remote control terminal of the conventional VTR. In FIG. 4, 1 is a VTR on the reproducing side, 2 is a VTR on the editing side, and A is a remote control terminal of the VTR on the editing side, and is usually connected to a remote control for controlling ON / OFF of pause. B is an edit start / stop control signal and is connected to the remote control terminal A so as to control the VTR1 on the reproducing side to the VTR2 on the editing side. Hereinafter, the operation will be described.

First, operate VTR1 and set it to play pose at the point where you want to start dubbing. Next, operate VTR2 to set the rec pose at the editing start point. At this time, the control signal from VTR1 is at the low (L) level, and VTR2 is fixed in the PAUSE state. The control signal from VTR1 is high (H) when the playback of the VTR1 is canceled after releasing the pause of VTR1 at the editing start point.
When the level is reached, VTR2 is automatically released from the pause upon receiving this signal, and editing starts. After this, the editing end point is reached, and when the VTR1 is put into play pause by human operation, the control signal B becomes low level again, and in response to this,
The VTR2 automatically becomes a rec pose. By this method,
Humans can control the editing start / stop of VTR2 on the editing side simply by operating VTR1 on the reproducing side.

Problems to be Solved by the Invention However, in the VTR, in general, there is a time delay that the actual recording starts after performing the synchronous operation of the servo circuits in order to perform a so-called continuous recording operation at the beginning of recording. For this reason, in the above two methods, when the editing pause is released in the VTR2 on the editing side and the editing is started, the VTR1 on the playback side is also used until the recording actually starts.
Has been reproduced, and there is a problem that reproduced images for the time delay are not dubbed.

To solve this problem. In a high-end editing system, playback side VTR1 and editing side VTR2 are connected by serial signals or a large number of parallel signals to perform complicated editing control.
Although the editing accuracy is improved, it is difficult to introduce it into low-priced popular models because it causes cost increase, complicated operation, and deterioration of image quality and sound quality due to serial signal noise.

In view of the above problems, the present invention provides a magnetic recording / reproducing apparatus capable of highly accurate editing by a simple operation and simple control of a VTR.

Means for Solving the Problems In order to solve the above problems, a magnetic recording / reproducing apparatus of the present invention comprises a reproducing apparatus for traveling a first magnetic recording medium to reproduce a signal and a second magnetic recording medium. An editing device for running and recording a signal, a reproducing device and the editing device are connected, and a signal transmission line for inputting to the editing device so that the reproducing device records the reproduced signal reproduced by the reproducing device, the reproducing device and the editing device First, connecting to and sending a control command from the editing device to the playback device
A command transmission line and a second command transmission line that connects the reproduction device and the editing device and sends a control command from the reproduction device to the editing device are provided, and the editing device synchronizes with the reproduction signal input through the signal transmission line. The magnetic recording medium of No. 2 is run, and the reproducing apparatus inputs the reproduction start command output from the editing apparatus via the first command transmission line to move the first magnetic recording medium from the stopped first position. Playback is started after rewinding for a predetermined time, and an editing start command is output to the editing device via the second command transmission line before the first magnetic recording medium reaches the first position. The editing device records a reproduction signal when the first magnetic recording medium reaches the first position.

Effect of the Invention With the above-described structure, the present invention allows not only the editing device and the reproducing device to be operated by a simple operation of the editing device, but also the reproducing device starts the reproduction of the first magnetic recording medium at the first position. After rewinding (pre-roll) once for a predetermined time, the reproduction is started, and the editing start command is sent to the editing device through the second command transmission line until the first position is reproduced. The traveling of the medium can be synchronized with the reproduction signal output from the reproducing apparatus, and the desired position can be edited and recorded from the first position of the first magnetic recording medium to the second magnetic recording medium. It enables accurate editing.

Example Hereinafter, regarding the magnetic recording and reproducing apparatus of the example of the present invention,
This will be described with reference to the drawings. FIG. 1 is a block diagram of a magnetic recording / reproducing apparatus of a first embodiment of the present invention, which mainly shows a command signal. In FIG. 1, 1
Indicates a reproducing side VTR which is a reproducing device, and a tape (not shown) which is a first magnetic recording medium is run to reproduce the audiovisual information recorded on the tape. An editing-side VTR 2 serving as an editing device records a video / audio information (not shown) output from the reproducing-side VTR 1 by running a tape (not shown) serving as a second magnetic recording medium. C is from edit side VTR2 to playback side VT
A reproduction start / stop command to the R1 via the first command transmission line, and D is an edit start command from the reproduction side VTR to the editing side VTR2 via the second command transmission line.

Regarding the magnetic recording / reproducing device configured as described above,
The operation will be described below with reference to FIGS. 1 and 2.

First, FIG. 2 shows the tape running direction and the passage of time of the VTRs on the reproducing side and the editing side. First, by the time t _s , the reproducing side VTR1 is in the reproduction paused state and the editing side VTR2 is in the temporary editing state. It is set to the stopped state, and at time t _s , the editing VTR2
Sends a playback start command C ₁ to the playback VTR ₁ . In response to this, VT
R1 rewinds the tape in the reverse reproduction state for a period of t _p −t _s , performs a so-called pre-roll operation, and then starts reproduction in the forward direction. During this playback, when the previous position t ₁ is reached for the servo synchronization period T of the editing-side VTR2 from the position where the playback was paused at t _s , the playback-side VTR1 sends an editing start command D to the editing-side VTR2. In response to this, the editing side VTR2 starts editing. Incidentally, the pre-roll period (t _p -t _s) should be slightly longer than the servo synchronization period T. As a result, the editing side
When VTR2 finishes servo synchronization and actually starts recording, the playback side VTR1 is playing back the position at the time of the original playback pause state, and the first part of the playback section is missing like the conventional example. Editing is started without doing. When reaching the end portion of the editing Eventually, the playback stop command C ₂ temporary edit a side VTR2 stop or to the like stop state to the reproduction side VTR1 sent, the reproduction side VTR1 receives this playback pause or It will be stopped.

As described above, according to this embodiment, the editing VTR and the playback V
The first two TR units, together with the video and audio signals on the signal transmission line,
And, it connects with two command signals by the second command transmission line, the VTR on the playback side starts pre-roll playback by the command from the VTR on the editing side,
If the editing VTR is started to be edited by the command from the playback VTR before the editing start point for the servo synchronization period of the editing VTR and the editing operation of the editing VTR is stopped at the editing end point, the editing VTR will By providing a function that also stops the playback of the VTR on the playback side with the command of, by simple connection and operation,
It is possible to perform accurate editing.

FIG. 3 shows the configuration of the second embodiment, which is a more specific implementation of the first embodiment. In the case of using a reproducing VTR 11 such as an 8 mm VTR as a reproducing device and an editing VTR 12 as an editing device. explain.

The playback VTR 11 is provided with a remote control terminal 11a for remote control, and has a function of enabling remote control via the remote control 13 and the code 13a.

That is, the playback VTR 11 is connected to the playback VTR 11 by the remote controller 13
When the playback VTR 11 is set to the REC mode with the switch connected, the signal from the remote control 13 is sent from the remote control 13 when the switch 14 provided on the remote control 13 is turned on.
The VTR 11 on the reproducing side is in a pause (or recording) state. When the switch 14 is turned off, the playback side VT
R11 is released from the pause (or recording) state, enters the REC (or stop) state, and starts (or stops) recording.

Next, if the playback VTR 11 is set to PLAY mode, turn on the switch 14 of the remote controller 13,
After performing a pre-roll for a predetermined period of time by an output signal from the remote controller 13, a reproducing operation is started and a signal notifying that the reproduction is being performed after a predetermined time is sent to the remote controller 13 to cause the LED 15 on the remote controller 13 to emit light.

Then, when the switch 14 is turned off, the reproducing VTR 11 finishes the reproducing operation and is stopped or temporarily stopped.

On the other hand, the VTR 12 on the editing side has a function of sending a command C ₁ for prerolling to the VTR 11 on the reproducing side, and the VT on the reproducing side.
The servo synchronizing operation is started in response to the input of the command D from R11, the recording operation is performed after the lapse of a predetermined period T, and the command C ₂ is sent to the reproducing side VTR 11 when the recording is completed.

Here, the operation of this embodiment will be described with reference to FIGS. 2 and 3.

In this embodiment, the playback side VTR 11 and the editing side VTR 12 are in a state in which the remote control terminal 11a and the terminal 12a are connected by a code (not shown), and the basic operation is as shown in FIG. Since it is the same as the example, it will be briefly described below. When editing is performed with the playback VTR 11 and the editing VTR 12 connected as described above, first, by pressing the switch or the record button from the editing VTR 12, as shown in FIG. Command C ₁ is sent to _s for playback VTR 11.

The VTR 11 on the playback side receives the command C ₁ and starts the pre-roll operation at time t.
_{After p} is reached, command D is sent to the editing VTR 12 at time t _1.
Is sent.

Editing side VTR 12 receives this command D, and the time t _o of after a servo synchronization period T, to start the editing operation of the editing side VTR 12. At time t _e after recording for a predetermined time, by pressing either the switch or the stop button or the pause button (not shown), command C ₂ is sent to the playback VTR 11 and the playback VTR 11 is stopped or temporarily stopped. Set to the stopped state.

As described above, according to the present embodiment, it is possible to perform accurate editing with the same simple connection and operation as in the first embodiment.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to obtain an excellent effect that an accurate editing can be performed by controlling, for example, two VTRs as an editing device and a reproducing device by a simple connection and a simple operation. You can

[Brief description of drawings]

FIG. 1 is a block diagram of a magnetic recording / reproducing apparatus according to a first embodiment of the present invention, and FIG. 2 is a time chart diagram showing tape running states of a reproducing VTR and an editing VTR according to the same embodiment. Is a block diagram of a magnetic recording / reproducing apparatus according to a second embodiment of the present invention.
FIG. 4 is a block diagram of a conventional example. 1,11 …… Playback VTR, 2,12 …… Editing VTR, 13 …… Remote control, 13a …… Code, 14 …… Switch, 15 …… Diode, C …… Playback start / stop command, D …… Edit start command.

Claims (2)

(57) [Claims] 1. A reproducing apparatus for traveling a first magnetic recording medium to reproduce a signal, an editing apparatus for traveling a second magnetic recording medium to record a signal, the reproducing apparatus and the editing apparatus. A signal transmission line connected to the editing apparatus so that the editing apparatus records a reproduced signal reproduced by the reproducing apparatus, the reproducing apparatus and the editing apparatus are connected to each other, and the editing apparatus transfers the reproducing apparatus to the reproducing apparatus. A first command transmission line for sending a control command; and a second command transmission line for connecting the playback device and the editing device to send a control command from the playback device to the editing device, wherein the editing device The second magnetic recording medium runs in synchronization with a reproduction signal input through a transmission line, and the reproduction device inputs the reproduction start command output by the editing device through the first command transmission line, First
Of the magnetic recording medium from the stopped first position after rewinding for a predetermined time and then reproduction is started, and the second command is issued before the first magnetic recording medium reaches the first position. An editing start command is output to the editing device via a transmission line,
The magnetic recording / reproducing apparatus, wherein the editing apparatus records a reproduction signal when the magnetic recording medium reaches the first position. 2. The edit start command is output before the first position of the first magnetic recording medium by the time required to synchronize the second magnetic recording medium with the reproduction signal input by the editing device. The magnetic recording / reproducing apparatus according to claim 1, wherein