JP2940183B2 - Editing control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an editing control device for selectively recording a desired portion of a reproduced image reproduced by a reproducing VTR on a recording VTR.

[0002]

2. Description of the Related Art In a commercial VTR, the accuracy of the tape position can be expressed in units of frames using a time code. On the other hand, in a conventional home VTR, a position signal corresponding to the position of the tape is represented by time information related to the running of the tape. The minimum unit of this time information is
Usually in seconds.

An editing controller combined with a home VTR is already known, but a time delay occurs when the recording side VTR is controlled by a control signal from the editing controller. In other words, a time delay occurs between the time when the recording side VTR receives the recording start command from the controller and the time when the recording operation is actually started, and the time when the recording operation is actually started after the recording end command is received from the controller. There is a time delay before stopping the operation. As a result, there arises a problem that a part of an image to be recorded is missing in the edited result. It is preferable to provide a function of correcting the time delay in the editing controller. In this case, since the correction value can be known in advance by, for example, reproducing the edited tape, the above-described problem can be prevented by superimposing the correction value on the time at which the timing of the edit point occurs.

[0004]

As described above, since the minimum unit of time information corresponding to the tape position of a home VTR is seconds, even if the correction value is obtained at the resolution of the frame, the correction is not necessary. Cannot be performed with frame accuracy. Therefore, an object of the present invention is to provide a playback-side VT
An object of the present invention is to provide an editing control device capable of controlling editing timing with frame accuracy even if the position signal of R has a second accuracy.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a reproducing VT.
The video signal reproduced by R (1) is recorded on the recording side VTR.
According to (2), in the editing control device that performs control for selective recording, the reproduction position of the reproduction side VTR (1) is set to seconds.
The position signal indicated by the unit time information is supplied, and the recording side VT is
A controller (3) for generating a control signal for controlling the operation of R (2) is provided. The controller (3) is defined by the position signal before the timing of controlling the operation of the recording VTR (2). An editing control apparatus characterized in that the number of frames within one second or several seconds is measured, and a correction amount of control timing is formed based on the measured information.

[0006]

The time delay can be corrected in units of frames by measuring the number of frames per second in the controller 3 even if the position signal from the reproduction side VTR 1 is up to seconds and the number of frames is not indicated. .

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire configuration of an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a VTR (PBVT) on the reproduction side.
R is a recording side VTR (referred to as a RECVTR), 3 is a controller, and 4 is a television monitor. The video and audio signals reproduced by the PBVTR 1 are supplied to the RECVTR 2 via the signal line 5. When the RECVTR 2 performs a reproducing operation, the reproduced video signal is supplied to the television monitor 4,
Except for the RECVTR2 reproducing operation, the PBVTR
One reproduced image is supplied.

[0008] Between the PBVTR 1 and the controller 3,
A bidirectional control line 6 is provided. This control line 6
From the PBVTR 1 to the controller 3 via
In a predetermined format, counter information expressed in hours, minutes and seconds corresponding to the position of the tape, that is, a position signal is supplied.
1 is supplied with a control signal of a predetermined format for controlling the operation. Through a unidirectional control line 7 provided between the RECVTR 2 and the controller 3,
A control signal of a predetermined format for controlling the operation is supplied from the controller 3 to the RECVTR 2. The controller 3 is provided with various keys, a jog dial, a liquid crystal display for displaying position signals, and the like.

When editing by the controller 3,
By operating the keys or the jog dial of the controller 3 while viewing the playback image of the PBVTR 1, the editing point is determined. As an editing point, an IN point at which recording is started by the RECVTR 2 and an OUT point at which recording is ended are determined. The position data corresponding to these edit points is stored in the memory of the controller 3. Next, under the control of the controller 3, the PBVTR 1 starts the reproducing operation before the IN point, and when the PBVTR 1 reaches the IN point, the controller 3 sets
2 generates a pause signal for changing from the recording pause mode to the recording mode. Then, at the OUT point, the controller 3 generates a pause signal to the RECVTR 2 to switch the recording mode from the recording mode to the recording pause mode.
Is controlled.

At the time of editing, there is a time delay from when the controller 3 generates the pause signal until the REC VTR 2 actually enters the recording mode, or until the REC VTR 2 actually enters the recording pause mode. PB
When a time display indicating a change in seconds and frames is superimposed on a part of the reproduced image of the VTR 1, a time delay up to the accuracy of the frame can be detected. For example, set the IN point to 0
A time delay can be detected by setting the time to 00 seconds and 00 frames and viewing the time display in the image at the IN point as a result of trial editing. The detected time delay is added to the position of the IN point as a correction value.

FIG. 2 is a diagram used to explain the generation of the timing of the corrected editing point, for example, the IN point, performed by the controller 3. The horizontal axis in FIG. 2 indicates the target position P corresponding to the set edit point and the current PBVT.
The difference between R and the reproduction position is shown. Here, since the minimum unit of the position signal is seconds, the position signal becomes 0 at the target position P, and the seconds before the target position P increase. Further, x (second and frame) is the detected correction value, and therefore, the position Q before x with respect to the target value P is RECVTR2.
Is the timing of generation of a pause signal for switching from the recording pause mode to the recording mode.

Referring to the flowchart of FIG. 3, it is detected that the PBVTR 1 performs a regenerating operation from before the IN point as a run-in operation and that it is seven seconds before (step 8). At a timing of seven seconds before, a measurement standby state is set (step 9). This means that the counter for measurement is reset. And PBVT 6 seconds before
When it is detected that the reproduction position of R1 has reached (step 10), the number of frames is measured (step 1).
1). This measurement of the number of frames is performed by counting the number of communication of control signals transmitted from the PBVTR 1 to the controller 3 via the control line 6 during one second from six seconds to five seconds before. In this embodiment, the control signal is P
It is transmitted once in one frame of the reproduced video signal of the BVTR 1. The measured number of frames per second is represented by n. One second of the position signal of the PBVTR 1 is detected from, for example, the number of revolutions of the reel, so that it is not necessarily exactly (n = 3).
0) is not limited.

Next, in step 12, the correction data y is calculated based on the measurement result. This is (y =
5n-x). This correction data y is subtracted from the position information of the target point P as an actual correction value, so that I
The timing Q at point N is determined. Therefore, if the detection of the correction value x can be performed with the frame as the minimum unit,
The timing Q of the IN point can also be performed in frame units.

Although the above description relates to the correction of the IN point, the correction of the OUT point can be performed independently and similarly to the correction of the IN point. Further, the present invention can be similarly applied to a case where the PBVTR 1 can generate the position information using the time code, and the position information having the digit of the frame is supplied to the controller 3.

[0015]

According to the present invention, it is possible to correct a time delay when the operation of the recording side VTR is controlled by the controller. In particular, even when the position signal of the tape generated from the reproduction side VTR is in units of seconds, it is possible to form a correction value in units of frames, and it is possible to correct a time delay with high accuracy.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating an outline of a correction operation for an edit point.

FIG. 3 is a flowchart used to explain an editing point correction operation.

[Explanation of symbols]

 1 PBVTR 2 RECVTR 3 Controller

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-17883 (JP, A) JP-A-1-107389 (JP, A) JP-A-1-260686 (JP, A) JP-A-2- 168456 (JP, A) JP-A-2-91873 (JP, A) JP-A-1-277383 (JP, A) JP-A-59-129975 (JP, A) JP-A-49-132920 (JP, A) (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 27/024 H04N 5/7826

Claims (1)

(57) [Claims] 1. An editing control device for performing control for selectively recording a video signal reproduced by a reproduction side VTR by a recording side VTR, wherein a reproduction position of the reproduction side VTR is indicated by time information in seconds. A position signal is supplied, and a controller is provided for generating a control signal for controlling the operation of the recording-side VTR. The controller is defined by the position signal before the timing of controlling the operation of the recording-side VTR. An editing control device for measuring the number of frames within one second or several seconds, and forming a correction amount of the control timing based on the measured information.