JPH02168456A - Edit controller - Google Patents

Abstract

PURPOSE:To attain the assembly edit with high accuracy by using a variable means so as to set the timing of recording start for recording VTR in response to the delay in the recording of the recording VTR. CONSTITUTION:Pre-roll by a prescribed quantity is applied from the start of edit at a reproduction VTR 1 and a recording VTR 2 is brought into the recording pause state. Then variable means 3 - 5 are used to set the timing of the recording start in response to the delay in the recording of the recording VTR 2. That is, a pause output signal raised earlier by a prescribed time from the edit start point of time is supplied from the variable means 3 - 5 to the recording VTR 2 in response to the delay in the recording of the recording VTR 2 to transit the recording VTR 2 into the recording state, and then the recording state is entered from the edit start point actually. Thus, the delay time till the transit to the recording after the recording pause is absorbed substantially and the assembly edit with high accuracy is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an editing control device suitable for use when performing a so-called dubbing operation using a reproducing VTR and a recording VTR having a pre-roll function.

[Summary of the invention]

The present invention includes a recording VTR, a reproduction VTR having a pre-roll function, and a variable means for varying the recording start timing of the recording VTR, and the reproduction VTR is professionally rolled and the recording VTR is placed in a recording pause state. and recording VT
VTR for recording by variable means according to the recording operation delay of R.
By setting the recording start timing, the delay time from the recording pause to the transition to recording can be absorbed, and highly accurate Tsutsuyoshi assembly editing can be realized.

[Conventional technology]

Currently, some VTRs are equipped with a so-called camera remote terminal to which control signals from the camera are supplied, and if this is used when dubbing, it is possible to easily record by repeating the sequence of recording Bose → recording → recording pause. Assemble editing is possible.

The control signal used during this recording succession is a so-called pause-out signal, and since this pause-out signal is a simple status signal as shown in FIG. 5, control is very simple.

And when dubbing, the camera has a remote terminal.
TR is a recording VTR and a playback VT that is a player.
What is necessary is to output the above-mentioned pause out signal from R.

[Problem to be solved by the invention]

However, when dubbing is performed using such a camera remote terminal, there is a delay time in seconds from the recording pause to recording or from recording to recording pause on the recording VTR side equipped with the camera remote terminal. death,
Also, the delay time varies depending on the set, so I was very satisfied from the accuracy point of view (assemble editing was not possible).

The present invention has been made in view of the above, and provides an editing control device that can substantially absorb the delay time from recording pause to recording or from recording to recording pause, and can perform accurate assemble editing. This is what we provide.

[Means to solve the problem]

The editing control device according to the present invention includes a recording VTR (2), a playback VTR (1) having a pre-roll function,
The recording VTR (2) is equipped with variable means (3 to 5) for varying the recording start timing of the recording VTR (2).
1), the recording VTR (2) is placed in a recording pause state, and the recording VTR (2) is adjusted by the variable means (3 to 5) according to the recording operation delay of the recording VTR (2).
2) The recording start timing is set.

(Function) A pre-roll is performed by a predetermined amount in the reproduction VTR (1) from the start of editing, and at this time the recording VTR is placed in a recording pause state. Then, the recording start timing is set by the variable means (3 to 5) according to the recording operation delay of the recording VTR (2). In other words, the recording VTR (
Variable means (3 to 5) for a pause output signal that rises a predetermined amount of time earlier than the editing start point in response to the recording operation delay in step 2);
This recording V T R (2) is supplied to the recording V T
R(2) is changed to the recording state, and then the recording state is actually entered from the editing start point. This substantially absorbs the delay time from the recording pause to the transition to recording, making it possible to assemble and edit with high precision.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on FIGS. 1 to 4.

FIG. 1 shows the configuration of this embodiment, and in the figure,
(1) is a playback VTR with a pre-roll function (2)
The recording VTR 1 (3) is a controller using, for example, a microcomputer as a variable means, and this controller (3) has an input for adjusting the rise of the pause-out signal supplied to the recording VTR (2). Adjustment volume (IN ADJ, VR) (4) and recording VTR
(2) and an out adjustment volume (OUT ADJ, VR) (5) for adjusting the fall of the pause out signal supplied to the output signal.

The pause-out signal (Fig. 2C) supplied from the controller (3) to the recording VTR (2) is sent to the playback VTR (2).
Considering the delay time of transition from recording pause to recording of the recording VTR (2) connected to 1), the active state (high level ). The IN adjustment volume (4) is used to vary this timing, and its variable range is from the start of run-up during pre-roll (time code a) to the IN point (time code b), as shown in Figure 2, for example. θ〜
There are 80 frames.

In addition, the controller (3) connects the recording VTR (2).
The pause-out signal supplied to the recording VTR (2
) considering the delay time of transition from recording to recording pause,
The non-active state (low level) is made earlier than the editing end point (OUT point in FIG. 2A).

This timing can be varied using the out adjustment volume (5
), and its variable range is from time code C to 0IJT point (time code d) as shown in Figure 2, for example, O
~16 frames.

Next, the operation of the circuit shown in FIG. 1 will be explained with reference to FIGS. 2 to 4.

First, the operation at the start of editing will be explained with reference to FIG. 3 as well as FIG. 2. In step (11), the controller (3) reads the editing start point, that is, the time code b of 18 points, and the editing end point, that is, the time code d of point 017, from the tape (not shown) of the reproduction VTR (1). In step (12), the controller (3) controls the playback VTR (1
) to start pre-rolling (rewinding) the tape by a predetermined amount, for example, for about 3 seconds (depending on the set) as shown in FIG. 2A. In step (13), the controller (3) determines whether or not the rewinding has been completed. If it has not been completed, the process waits until the rewinding is completed, and when the rewinding is completed, the process proceeds to step (14).

In step (14), the controller (3) sets the voltage value of the in adjustment volume (4) (time to output (activate) the pause out signal early from point 18 = e (see Figure 2 C)
Load. Note that the voltage value of the in-adjustment volume (4) can be arbitrarily set within a variable range.

In step (15), a time code value X at which a pause-out signal should be output, that is, should be in an active state, is calculated. This time code value X can be determined by x=b-ecJ.

In step (16), the controller (3)
(1) to start the run-up. In step (17), the controller (3) determines whether the current time code being reproduced from the tape of the playback VTR (1) is greater than or equal to the time code X calculated as described above.
If the result is negative, the current timecode is timecode X.
If the result is positive, that is, if the current time code is greater than or equal to the calculated time code, a pause out signal is output in step (18). That is, as shown in FIG. 2C, the pause out signal is changed from a low level to a high level to be in an active state.

Then, when the pause-out signal generated in this way is supplied to the recording VTR (2), the recording VTR (2)
) enters the recording state from the recording pause state at the editing start point (18 points) after time e, as shown in FIG. 2B.

Next, the operation at the end of editing will be explained with reference to FIG. 3 as well as FIG. 2. In step (21), the controller (3) determines whether the current time code being played back from the tape of the playback VTR (1) is greater than the time code b at one point, and if the result is negative, The process waits until the current time code becomes 1 point time code -15 or more, and if the result is affirmative, that is, if the current time code is 1 point time code -15 or more, the process proceeds to step (22).

In step (22), the controller (3) reads the voltage value of the out adjustment volume (5) (the time -f (see FIG. 2C) at which the pause out signal should be made inactive as soon as possible from point 017). Note that the voltage value of the out adjustment volume (5) can be arbitrarily set within a variable range.

In step (23), a time code value Y at which the pause out signal should be made inactive is calculated. This time code value Y is Y=d-
It can be obtained from f.

In step (24), the controller (3) controls the playback VTR.
Determine whether the current time code being played from the tape in (1) is greater than or equal to the time code 7 calculated as described above, and if the result is negative, the current time code is greater than or equal to time code 7. If a positive result is obtained and the current time code is greater than or equal to the calculated time code 7, a pause out signal is output in step (25). That is, as shown in FIG. 2C, the pause-out signal is changed from high level to low level to be in a non-active state.

When the pause-out signal becomes inactive in this way, the recording VTR (2) changes from the recording state to the recording pause state as shown in FIG. 2B at the editing end point (O1IT point) after time r. enter.

Although the above embodiment uses a time code, a vertical synchronization signal or a control (CTL) signal recorded on a tape may be used instead.

In addition, in the above embodiment, the pause out signal supplied to the camera control terminal is used, but among the various control signals included in the so-called LINX, which has a format for bidirectional serial communication, the pause signal described above is used. The pause out signal may be generated at the edge (rising, falling) of the pause out signal, and may be switched from recording pause to recording to recording pause. In this case, the control terminal of the recording VTR is called a control terminal, not a camera remote terminal.

In this way, in this embodiment, the delay time from recording pause to recording or from recording to recording pause is adjusted by adjusting the volume (
4) and (5) can be freely modified and set, and the delay time can be substantially absorbed, allowing for simple assembly editing with high accuracy.

FIG. 1 is a circuit configuration diagram showing one embodiment of the present invention, FIGS. 2 to 4 are diagrams for explaining the operation of the present invention, and FIG.
The figure is a waveform diagram of a pause-out signal.

(1) is playback VTR1 (2) is recording VTR1 (3)
is a controller, (4) is an in adjustment volume, and (5) is an out adjustment volume.

〔Effect of the invention〕

As described above, according to the present invention, the recording start or end timing of the recording VTR is set by the variable means according to the recording operation delay of the recording VTR, so that the timing of recording from a recording pause or from recording to a recording pause can be changed. It is possible to substantially absorb the delay time until the transition to , and perform simple assemble editing with high accuracy.

[Brief explanation of the drawing]

Claims (1)

[Scope of Claims] A recording VTR, a reproduction VTR having a pre-roll function, and a variable means for varying the recording start timing of the recording VTR, wherein the reproduction VTR is pre-rolled and the recording VTR is An editing control device characterized in that the recording VTR is set in a recording pause state, and the variable means sets the recording start timing of the recording VTR according to a recording operation delay of the recording VTR.