JPH0373074B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an editing device suitable for use, for example, in editing a videotape, and particularly to an editing device that facilitates the determination of editing points when editing a videotape and enables good editing. This is what I did.

An embodiment of the editing apparatus of the present invention will be described below with reference to FIG.

In Figure 1, 1 and 2 are helical scan video tape recorders (hereinafter referred to as VTRs) that play back the original tapes that were shot.
Basically, one unit may be used, or two or more units may be provided as necessary. Such VTR 1 and 2
In addition to normal playback, it is possible to perform playback at a speed different from the tape running speed at the time of recording (normal speed), such as slow playback, double speed playback, still playback, and reverse playback. is being done. In this case, it is possible to provide position changing means such as an electro-mechanical conversion element in the reproducing head so that tracking is always performed correctly, so that a normal video signal can be obtained even during special reproduction as described above.

The VTRs 1 and 2 are also provided with a time code read head and a time code read circuit, and the time code of the original tape is supplied to a central processing unit (hereinafter referred to as CPU) 3.

Also, 4 is the master loaded with the master tape.
This master VTR4 is a VTR, and is configured so that it can perform slow playback, double speed playback, still playback, reverse playback, etc. in addition to normal running, and also has a built-in time code readout circuit, so that it can be read out. The time code is supplied to CPU3.

Furthermore, a reference time code is supplied to the CPU 3 from a reference time code generator 5 . Further, the contents of the time code generator 5 can be preset to a predetermined value by a signal from the CPU 3.

And from CPU3 to each VTR1, 2, 4
A tape running control signal and a recording/playback control signal are applied via the VTR control interface circuit 6. On the other hand, a reproduction mode signal is supplied from each VTR 1, 2, and 4 to the CPU 3 via the VTR control interface circuit 6.

In addition, data such as the speed at the edit point of the original tape, the time code of the desired video edit point of the original tape, the desired playback time, the speed at the edit point of the master tape, and the time code of the edit point of the master tape are sent to the VTR controller. 8 to the CPU 3 via the editing control interface circuit 7.

Furthermore, a memory 9 in which operating programs for the CPU 3 and the like are written is provided, and signals from this memory 9 cause the processing operations of the CPU 3 to be performed, and the CPU
Data etc. from 3 are stored in this memory 9.

In a part of this memory 9, for example, a second
Processing programs as shown in the flowcharts of FIGS. 3, 3, and 5 are written. This program shows the case where the reference time code from the time code generator 5 is used to determine, rehearse, and trim editing points between the original tape and the master tape.

Furthermore, a video signal switching circuit 10 is provided, and VTR1,
The output video signals from 2 and 4 are switched so that they are supplied to monitors 11 and 12. Reference numeral 13 indicates a video signal output terminal, and the video signal obtained at the video signal output terminal 13 can be broadcast.

Next, the case where mutual editing points are determined between the master VTR 4 and the VTR 1 will be explained.

When determining the editing point, use the VTR controller 8
You can arbitrarily change the tape running speed of VTRs 1 and 4 using the search dial 14 of the keyboard 1.
Repeat the key No. 5 to enter edit points, etc.

Here, Tcx ₁ indicates the time code of the first editing point of the original tape of VTR 1, and Try ₁ indicates the time code of the first editing point of the master tape of master VTR 4. Further, α is the preroll time expressed by a time code, and x is the tape running speed set with the search dial 14.

That is, as explained in the flowchart of Fig. 2, this editing device is started, the VTR 1 is transferred to the pre-roll point Tcx ₁ -αx of the original tape, and then stopped and the master VTR
4 to the pre-roll point Try ₁ −αx of the master tape and stop it. After that, VTR1 and VTR4 are simultaneously phase-adjusted and started in the playback state at a predetermined speed x, and the current time code Tx of VTR1 and the current time code Ty of VTR4 are sent to the CPU, respectively.
Supply to 3. Next, in CPU3, |Tcy−Ty|> = <|Tcx−Tx| is determined, and if the left side is larger than the right side, Z=|Tcy−Ty|−|Tcx−Tx| is calculated, and at this time the value of Z is Δ(Z) in relation to
, set the tape running speed of VTR1 to x-Δ(Z), and let the moving distance Dy of the master tape corresponding to |Tcy-Ty| and the moving distance Dx of the original tape corresponding to |Tcx-Tx| Make it equal.

In this case, when the value on the right side is larger than the value on the left side, Z'=|Tcx−Tx|−|Tcy−Ty| is calculated, and in this case, Δ(Z') is calculated in relation to the value of Z'.
, set the tape running speed of VTR 1 to X+Δ(Z'), and make Dy and Dx equal.
In this case, when the value on the right side and the value on the left side are equal, Dx and Dy are equal, so the VTR 1 is made to run at x times the speed. In this state, monitors 11 and 12
While watching the video, find an edit point different from the first edit point of the master tape and original tape, enter this, and save it as a program in memory 9.
Make sure to remember it. The above-mentioned determination of another editing point is repeated until a stop command is issued, and a desired program is constructed. In FIG. 2, the symbol is used to indicate both the forward mode and the reverse mode.

In this case, since the tape running speed of the VTRs 1 and 4 can be set to an arbitrary x times speed, editing points can be easily determined and accuracy can be increased.

In the above example, master VTR4 and VTR1
Although we have described an example of determining the editing point between the master VTR 4 and VTRs 1 and 2, or between multiple VTRs, it is also possible to mutually determine the desired editing point between the master VTR 4 and VTRs 1 and 2, or between multiple VTRs. It is easy to understand what can be done.

Next, the case where an editing point is determined between the master VTR 4 and the VTR 1 as described above and rehearsal is performed at the playback speed x will be explained using the flowchart of FIG. Here, x is the tape running speed set with the search dial 14. In this case, the reproduction speed x is determined by the previously programmed speed, but can be arbitrarily determined by adjusting the search dial 14 during execution.

First, let us explain the case of rehearsing in the forward direction as shown in Figure 4A. In this case, _TIP the time code of the editing start point (IN) of the original tape of VTR 1, and the time code of the master tape of VTR 4 at this point. Let the time code be T _IR , and let the time code of the end point (OUT) of editing on this original tape be T _OP . Let the time code of the master tape at this point be T _OR . Starting from this rehearsal, it is determined that the tape running direction of VTRs 1 and 4 is the normal direction, and when the tape running direction is the forward direction, VTRs 4 and 1 are prerolled.
That is, the master tape of VTR 4 is transferred to and stopped at T _IR -αx, and the original tape of VTR 1 is stopped at T _IP -αx. Next, both VTRs 4 and 1 start playing at a speed of x, monitor 11 is used as the main monitor, output video signal A of the contents of the master tape of VTR 4 is supplied, and this is played back. An output video signal of the contents of the original tape is supplied and played back. Then, the tapes of VTRs 1 and 4 are run in synchronization. Next, it is determined whether the editing point (IN point), that is, the master tape has reached the time code T _IR (original tape time code T _IP) , and when it reaches this IN point, the output video signal B of the VTR 1 is displayed on the main monitor 11. and play this by supplying
The output video signal of the VTR 4 is supplied to the monitor 12 and played back. Next, determine whether the other editing point (OUT point), that is, the master tape, has reached the time code T _OR (original tape time code T _OP ),
When this OUT point is reached, the main monitor 11
The output video signal C of the VTR 4 is supplied and reproduced, and at this time, the output video signal of the VTR 1 is supplied to the monitor 12 and reproduced, and this rehearsal is completed. In this case, the content of the edit can be monitored on the main monitor 11, and this playback mode can also be
By adjusting the search dial 15 of the VTR controller 8, the desired result can be obtained, so that a good editing rehearsal can be performed.

Next, a case where rehearsal is performed by reversing the editing time as shown in FIG. 4B will be explained. Reversing this time allows you to better understand how the surfaces are connected, which is extremely effective as a rehearsal.

When rehearsing in reverse, it is determined that the tape running direction of VTRs 1 and 4 is in the reverse direction,
Preroll VTR4 and 1. That is, the master tape of VTR 4 is transferred to and stopped at T _OR +αx, and the original tape of VTR 1 is stopped at T _OP + αx. Next, connect this VTR4 and 1 to -x
Rebus playback is started at a speed of
The output video signal of VTR 1 is supplied to 2 and played back.
Then, these VTRs 1 and 4 are made to run the tapes in synchronization. Next, it is determined whether another editing point (OUT point) has been reached, and when this OUT point is reached, the output video signal B of VTR 1 is supplied to the main monitor 11 and played back, and at this time the output of VTR 4 is The video signal is supplied to the monitor 12 and reproduced. Next, it is determined whether the editing point (IN point) has been reached, and when this IN point is reached, the output video signal A of the VTR 4 is supplied to the main monitor 11 and played back.
The output video signal of the VTR 1 is supplied to the monitor 12 for reproduction, and this reversal rehearsal is completed. In the above example, we talked about the rehearsal between master VTR4 and VTR1, but the master
It is easy to understand that rehearsal can be performed similarly between VTR 4 and VTRs 1 and 2, or between a plurality of more VTRs.

Next, when editing information needs to be corrected (trimmed) during the above-mentioned rehearsal, it is done according to the flowchart in FIG.

This trimming will be explained, for example, when correcting the IN point in FIG. 4A.

When this trimming is started, it is determined whether the editing information has been determined, and if it has not been determined, it is terminated, and if it has been determined, the output video signal A of the master VTR 4, which is the preceding material, is supplied to the main monitor 11. and play it on monitor 12.
The output video signal of VTR1 is supplied and played back. Next, it is determined whether there is a rehearsal command, and if this rehearsal command is present, the above-mentioned editing rehearsal is performed, and if there is no rehearsal command, it is determined whether a trimming release command is issued next, and this cancellation command is VTR when not available
It is determined whether there is a material movement command from the dial of the controller 8, and if this movement command is received, the relevant material is moved, and if there is no movement command, it is determined whether there is an editing information change command next. However, when this change command is received, this change is executed, and if there is no change command, it is then determined whether a rehearsal command has been received again. This operation is repeated until a trimming release command is issued. In this case VTR4 and 1
Since the playback speed can be set to any speed by slow playback, still playback, and adjustment of the search dial 14, accurate corrections can be made extremely easily.

Next, when a trimming release command is issued, it is determined whether or not the editing information has been changed, and when this change has occurred, the editing point, for example, the IN point, of the program stored in the memory 9 is corrected. After that, or if the editing information is not changed, the output video signal B of the VTR 1, which is the subsequent material, is displayed on the main monitor 11.
is supplied and reproduced, the monitor 12 is turned black, and the trimming is completed. When performing trimming again, repeat the above steps.

Further, in the present invention, various modifications other than those described above are possible.

For example, during rehearsals, both monitors 11 and 12
At the same time, the display for displaying editing information is returned from the state of waiting for determination of the next editing point to the previous state, that is, corresponding to rehearsal. Alternatively, when modifying the editing information, the above-mentioned display is similarly returned from the state of waiting for the next editing point to be determined to the previous state. Furthermore, when the editing information includes one or both of effects and variable speed playback information, the effects and variable speed playback information are linked to the time code on the tape to perform companding and companding of the time axis.
In response to a change in direction, commands for effect and/or variable speed playback are sent to the switcher or VTR.

In addition, the above-mentioned VTR may include a recording and playback device for other materials, or if the editing point of one material is corrected when editing the editing point, the editing point of the other material will be automatically corrected by the same amount (both It is similar to known editing devices in that it has a function in which the relative positions of materials are saved before and after modification, and a function in which editing points of both materials can be modified independently.

It goes without saying that the present invention is not limited to the above-described embodiments, and can take various other configurations without departing from the gist of the present invention.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the editing apparatus of the present invention, and FIGS. 2, 3, 4, and 5 are diagrams for explaining the present invention, respectively. 1 and 2 are VTRs, 3 is a CPU, 4 is a master VTR, 8 is a VTR controller, 9 is a memory,
11 and 12 are monitors, respectively.

Claims (1)

[Claims] 1. A first and second video signal reproducing device, and selectively displaying first and second reproduced video signals respectively reproduced from the first and second video signal reproducing devices. a monitor; and edit point setting means for setting desired first and second edit points on the first and second video signal recording media loaded in the first and second video signal reproducing devices, respectively. , current playback point detection means for detecting first and second current playback points on the first and second video signal recording media that are played back by the first and second video signal playback devices; Difference detection means for outputting differences Dx and Dy between the first and second current playback points and the first and second editing points; and a first control means for controlling the playback speed of the first video signal playback device so as to make the difference between the first and second video signal playback devices zero. a second control means for controlling the playback direction in a desired direction; and a switching means for switching the first and second playback video signals from one to the other at the first and second editing points and supplying the same to the monitor. An editing device characterized in that it is capable of rehearsing in either the forward direction or the reverse direction near the editing point.