JP2688511B2 - Magnetic recording / reproducing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a magnetic recording / reproducing system for copying the recorded contents of a recording medium onto another recording medium by using two magnetic recording / reproducing devices.

[Conventional technology]

There are cases in which it is desired to select various recording contents recorded on the magnetic tape, leave the necessary recording contents, and discard other unnecessary recording contents. In such a case, two VTRs (video tape recorders) are connected, and one VTR is loaded with the magnetic tape on which the above various recording contents are recorded, and the other VTR is mounted.
The magnetic tape on which the required recording contents of these are to be recorded is attached to this, and when the image signal of the required recording contents is reproduced from the magnetic tape of this one VTR, this other VTR is set as the recording mode. The signal was recorded on magnetic tape.

[Problems to be solved by the invention]

By the way, in the transfer method by so-called editing, in which only the necessary recording contents recorded on one magnetic tape are selected and transferred to the other magnetic tape in this way,
It is necessary for the user to operate the VTRs at the same time. That is, the magnetic tape having various recorded contents is the first magnetic tape, the VTR for reproducing the magnetic tape is the first VTR, and the magnetic tape on which the necessary recorded contents of the first magnetic tape should be recorded is the second magnetic tape. Recording on a magnetic tape, this second magnetic tape
If VTR is the second VTR, first, in the first VTR,
Perform the cueing operation to the desired recorded contents of the first magnetic tape, and when this cueing is completed, operate the first and second VTRs at the same time to put the first VTR in the playback mode and the second VTR. Set each recording mode. As a result, the image signal of the desired recorded content reproduced by the first VTR is sequentially recorded on the second magnetic tape by the second VTR, and the recorded content is transferred. When the reproduction of the recorded content is completed, the recording pause operation is performed on the second VTR, the next desired recorded content is cued to the first VTR, and the same operation is performed thereafter. It is done for each content.

As described above, in the conventional edit transfer method using two VTRs, the user needs to operate the two VTRs, which is troublesome and the operation timing is apt to be erroneous. If erroneous, the beginning or end of the desired recorded content will be missing, and accurate editing will not be possible.

Conventionally, in so-called camera-integrated VTRs, for example, service technical data, Hitachi Portable Video System M1
Circuit theory (VTR No.56, August 1982) As described in Hitachi Tokai Plant pp.31-32, on the camera side
The recording pause of the VTR can be set and released, and only the desired shooting scene can be selected and recorded. In this way, it is known to operate the VTR to be recorded from the camera side, but this is for selecting the shooting scene, and in the conventional VTR, one VTR is the other VTR. Control is not taken into consideration, and as described above, when editing and transferring the recorded contents of the magnetic tape, the above-mentioned troubles are taken and accurate editing becomes very difficult.

Further, in the above-mentioned edit transfer method, desired recording contents are simply spliced together. For this reason, when playing back the edited and transferred magnetic tape, the recorded contents suddenly change from one recorded content to the next and the images of these contents cannot be distinguished. In some cases it was very inconvenient.

An object of the present invention is to provide a magnetic recording / reproducing system which solves the above problems, enables edit transfer of a magnetic tape with a simple operation, and can clarify a seam of recorded contents. It is in.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention provides a first magnetic tape having a plurality of recorded contents recorded therein, wherein the first magnetic tape is mounted.
In the magnetic recording / reproducing apparatus, a control circuit for generating first and second control signals in response to a transfer start command and a transfer end command, and a predetermined period for each transfer start command and transfer end command by the first control signal. And an image processing circuit for performing a special effect processing on the reproduced video signal from the first magnetic tape, and the image signal of the desired recording content selected on the first magnetic tape is recorded by the second control signal. The second magnetic recording / reproducing apparatus equipped with the second magnetic tape for performing the mode control is controlled.

[Action]

When there is a transfer start command for the desired recorded contents of the first magnetic tape, the second magnetic recording / reproducing apparatus is set to the recording mode by the second control signal generated by the control circuit.
At the same time, in response to the first control signal, the image processing circuit outputs the reproduced image signal from the first magnetic tape while performing special effect processing for a certain period. The output image signal of the image processing circuit is recorded and recorded on the second magnetic tape. Next, when there is a transfer end command at the end of the desired recorded content, the image processing circuit performs special effect processing on the reproduced image signal from the first magnetic tape for a certain period of time by the first control signal, and thereafter, The second control signal causes the second magnetic recording / reproducing apparatus to enter the recording pause mode.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a magnetic recording / reproducing system according to the present invention.
Is a magnetic tape, 4 is a signal processing circuit, 5 is an image processing circuit,
6, 7 is a control circuit, 8 is a signal processing circuit, 9 is a magnetic tape, 1
0 is an input terminal, and 11 and 12 are signal lines.

In the figure, the magnetic recording / reproducing apparatus 1 has an image processing circuit 5 and a control circuit 6 in addition to the conventional configuration. The image processing circuit 5 is controlled by the control signal b generated by the control circuit 6, but in the case of normal reproduction of the magnetic tape 3, the image signal reproduced from the magnetic tape 3 is a normal signal. The reproduction processing is performed by the processing circuit 4, and the image is directly output through the image processing circuit 5.

When editing and transferring a magnetic tape on which a plurality of recording contents are recorded, this magnetic tape is mounted on the magnetic recording / reproducing apparatus 1 as the magnetic tape 3. Further, the magnetic tape 9 on which desired recording contents are to be recorded from the magnetic tape 3
Is mounted on another magnetic recording / reproducing apparatus 2. The magnetic recording / reproducing apparatus 2 may have the same structure as the magnetic recording / reproducing apparatus 1 or may have the conventional structure. A control signal input terminal for setting the mode is provided, and this input terminal and the control signal output terminal provided in the magnetic recording / reproducing apparatus 1 are connected by a signal line 11. This output terminal is connected to the control circuit 6.
Of course, the image signal output terminal of the magnetic recording / reproducing apparatus 1 is connected to the image signal input terminal of the magnetic recording / reproducing apparatus 2 by the signal line 12.

 Next, the operation of this embodiment will be described with reference to FIG.

Now, as shown in FIG. 1, the magnetic recording / reproducing devices 1 and 2 are connected, and the magnetic recording / reproducing device 1 is operated to locate the desired recorded content on the magnetic tape 3. At this time, the control circuit 6
Outputs a control signal c of "H" (high level), which is supplied to the control circuit 7 of the magnetic recording / reproducing apparatus 2 via the signal line 11, whereby the magnetic recording / reproducing apparatus 2 is in the recording pause state. Is set to. Further, the reproduced image signal from the magnetic tape 3 passes through the signal processing circuit 4 and the image processing circuit 5 and is supplied to a monitor (not shown) for image display for cueing. In this case, the monitor may be connected to the monitor terminal of the magnetic recording / reproducing apparatus 1 (thus, in this case, there is a connection terminal for the signal line 12 in addition to the monitor terminal), or the magnetic recording / reproducing apparatus. It may be connected to the monitor terminal of the device 2.

When the cueing of the desired recording content on the magnetic tape 3 is completed, a predetermined operation for starting the transfer is performed at the time t ₀ by the magnetic recording / reproducing apparatus 1.
In this case, the transfer start command signal a is input from the input terminal 10 to the control circuit 6, whereby the control circuit 6 sets the control signal c to, for example, "L" (low level). This allows
The control circuit 7 releases the recording paused state in the magnetic recording / reproducing apparatus 2 to the recording mode, starts the running of the magnetic tape 9, and immediately starts the operation of the signal processing circuit 8 immediately after the tape head system enters the steady operation state. Let

Further, the control circuit 6 outputs the control signal b for a predetermined time after the control signal c is set to "L" and a predetermined time ΔT has elapsed. During the period of the control signal b, the image processing circuit 5 performs a predetermined process on the image signal from the signal processing circuit 4. Here, in general, in a magnetic recording / reproducing apparatus, the magnetic tape is slightly rewound with the setting of the recording pause mode, the stop mode, etc., and the recording operation is started from the part rewound with the setting of the recording mode. It prevents the record loss in. The signal processing circuit 8 starts its operation immediately after the tape head system reaches a steady state in the rewound portion, but the image processing circuit 5 also performs a predetermined processing operation on the image signal simultaneously with the signal processing circuit 8. The delay time ΔT of the control signal b is set so as to start.

The image processing circuit 5 receives the control signal b by the input of the transfer start command signal a from the input terminal 10
Performs special effect processing such as fade-in of the image signal from. In this case, the image signal from the signal processing circuit 4 passes through the image processing circuit 5 as it is before the generation of the control signal b (at this time, the magnetic recording / reproducing apparatus 2 is in the recording pause state), but the control signal b And the image processing circuit 5
The output image signal becomes zero, and then the level is gradually increased to perform fade-in.

As described above, the output image signal of the image processing circuit 5 is supplied to the magnetic recording / reproducing apparatus 2 through the signal line 12, is recorded by the signal processing circuit 8, and is recorded on the magnetic tape 9.
The desired recorded contents of the magnetic tape 3 are transferred to the magnetic tape 9.

When the magnetic recording / reproducing apparatus 1 performs a predetermined operation for ending the transfer immediately before the end of the recorded content, the transfer end command signal a is input from the input terminal 10, whereby the control circuit 6 immediately follows the fixed time. The control signal b is output. By the control signal b, the image processing circuit 5 performs special effect processing such as fade-out on the image signal from the signal processing circuit 4.
Further, the control circuit 6 sets the control signal c to "H" at the same time as the completion of the control signal b, and sets the magnetic recording / reproducing apparatus 2 in the recording pause state.

With the setting of the recording pause, the magnetic tape 9 is slightly rewound as described above, and the image processing circuit 5 allows the image signal from the signal processing circuit 4 to pass through as it is. As a result, it becomes possible to find the next desired recorded content on the magnetic tape 3. Then, in the same manner, the desired recorded contents on the magnetic tape 3 are transferred to the magnetic tape 9. Whether the control signal b causes the image processing circuit 5 to perform the fade-in process or the fade-out process depends on whether the magnetic recording / reproducing apparatus 2 is in the recording state when the command signal a is input. The control signal c is shown by the level, but this is for convenience of explanation, and the magnetic recording / reproducing apparatus 2 is in the recording state, the recording pause state. The control circuit 6 can determine which one of the states is present).

As described above, in this embodiment, the magnetic recording / reproducing apparatus 1
From the side, the magnetic recording / reproducing apparatus 2 and the magnetic recording / reproducing apparatus 2 can be simultaneously and synchronously controlled for transfer, and the edit transfer can be accurately performed by a simple operation. With magnetic tape, special effects such as fade-in and fade-out can be realized at the joints of the recorded contents, and the boundaries of the recorded contents become clear.

As a special effect, various techniques are described in, for example, "Electronic Software for Images" pp.111-124 edited by Television Society of Japan, and any of these can be used. For example, when wiping is used, the display area of the image of the previous recorded content can be sequentially decreased to zero, and then the display area of the image of the next recorded content can be sequentially increased from zero. .

FIG. 3 is a block diagram showing another embodiment of the magnetic recording / reproducing system according to the present invention, in which 13 is a conversion circuit, 14 is an input terminal, and the parts corresponding to those in FIG. A duplicate description will be omitted.

A control signal is recorded on the magnetic tape,
Usually, a magnetic recording / reproducing apparatus is provided with a tape counter, and by counting the control signal reproduced from the magnetic tape by this tape counter, the position on the magnetic tape can be determined from the count value. Also, the difference in duty ratio of the control signal is used to represent "1", "0" bit, and like "VISS information" which represents information by "1", "0", the control signal is recorded on the magnetic tape. There is also known a technique of including information indicating a position. In this embodiment, a transfer start or transfer end command signal is generated using the position information on the magnetic tape as described above.

In FIG. 3, a count value of a tape counter (not shown) or position information extracted from a control signal is input from the input terminal 14, and the conversion circuit 13 presets the count value or position information in advance. The command signal a for starting transfer and the command signal a for ending transfer are generated every time when the values of the above values coincide.

For this reason, the user preliminarily reproduces and monitors the magnetic tape 3 to determine the start position and the end position of the desired recording content before performing the edit transfer, and the count value or control of the tape counter indicating these positions. The value of the position information extracted from the signal is set in the conversion circuit 13 as a reference value. After that, when the operation for setting the mode of edit transfer is performed in the magnetic recording / reproducing apparatus 1, the cue is automatically performed until the start of the desired recorded content is found in the conversion circuit 13,
When the conversion circuit 13 outputs the transfer start command signal a after the cueing is completed, the transfer operation similar to that of the embodiment shown in FIG. 1 is started, and when the transfer end command signal a is output, In the same manner, the transfer operation is completed and the next recording content cueing operation is performed.

According to this embodiment, the start and end of each recorded content is decided before the actual edit transfer, so that the start and end can be set very finely and more accurate editing can be performed.

In each of the above-described embodiments, when the output image signal of the signal processing circuit 4 of the magnetic recording / reproducing apparatus 1 is supplied to another monitor output terminal to perform cueing monitoring, the signal processing of the magnetic recording / reproducing apparatus 2 is performed. The image processing circuit 5 may not output the image signal during the period when the circuit 8 is inactive.

〔The invention's effect〕

As described above, according to the present invention, the edit transfer operation of the magnetic tape by the two magnetic recording / reproducing apparatuses can be performed easily and accurately, and the recorded contents which are spliced together can be obtained. The boundary between the two becomes clear, and it is possible to obtain an excellent effect that the distinction between the recorded contents of the reproduced image can be immediately recognized at the time of reproduction.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the magnetic recording / reproducing system according to the present invention, FIG. 2 is a diagram showing the timing of each signal in FIG. 1, and FIG. 3 is another magnetic recording / reproducing system according to the present invention. It is a block diagram which shows an Example. 1,2 ... Magnetic recording / reproducing device, 3 ... Magnetic tape, 4 ...
Signal processing circuit, 5 ... Image processing circuit, 6,7 ... Control circuit, 8 ... Signal processing circuit, 9 ... Magnetic tape, 13 ... Conversion circuit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Sasaki 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi Video Engineering Co., Ltd. (56) References JP-A-61-280088 (JP, A) JP-A-62 -236190 (JP, A)

Claims (4)

(57) [Claims] 1. A second magnetic recording / reproducing apparatus for selecting a desired recording content from a first magnetic tape on which a plurality of recording contents are recorded by the first magnetic recording / reproducing apparatus to reproduce an image signal. In order to record the image signal on the second magnetic tape, and to transfer the desired recorded contents from the first magnetic tape to the second magnetic tape.
Means for starting reproduction of an image signal of the desired recorded content from the first magnetic tape by a transfer start command signal and ending the reproduction of the image signal by a transfer end command signal; the transfer start command signal and the transfer A control circuit that generates a first control signal for a predetermined period for each end command signal and generates a second control signal during the period from the transfer start command signal to the end of the first control signal according to the transfer end command signal. And an image processing circuit that outputs a processed image signal from the first magnetic tape through the processed image signal for a predetermined special effect during the period of the first control signal. And a terminal for outputting a control signal of the second magnetic tape are provided to the second magnetic recording / reproducing apparatus, and the output image signal of the image processing circuit is supplied to the second magnetic recording / reproducing apparatus. And the second
Is supplied to the second magnetic recording / reproducing apparatus as a recording control signal, and the second magnetic recording / reproducing apparatus is brought into a recording state during the period of the second control signal. . 2. The magnetic circuit according to claim 1, wherein the control circuit generates the first control signal according to the transfer start command signal after a lapse of a predetermined time after the transfer start command signal is supplied. Recording / playback method. 3. The transfer start command signal according to claim 1, wherein a count value of a tape counter is supplied to the first magnetic recording / reproducing apparatus, and the transfer start command signal is generated every time the count value reaches a preset value. A magnetic recording / reproducing system characterized in that means for generating the transfer end command signal is provided. 4. The first magnetic recording / reproducing apparatus according to claim 1, wherein the information contained in a control signal reproduced from the first magnetic tape is detected and preset. A magnetic recording / reproducing system characterized in that means for generating the transfer start command signal and the transfer end command signal for each information is provided.