JPH0373073B2 - - 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 in particular is adapted to facilitate the determination of editing points when editing a videotape.

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 tape running speed different from the tape running speed at the time of recording (normal speed), that is, slow playback, double speed playback, still playback, etc. There is. 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.
As a VTR, this master VTR4 is also configured to be able to perform slow playback, double speed playback, still playback, etc. in addition to normal running, and has a built-in time code readout circuit, and the read out 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.

Also, speed ratio x at the edit point of the original tape, time code Tcx at the edit point of the desired video on the original tape, desired playback time, speed ratio x at the edit point of the master tape, time code at the edit point of the master tape. Data such as Tcy is supplied from 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.

A processing program as shown in the flowchart of FIG. 2, for example, is written in a part of this memory 9. Note that this program shows a case where the reference time code from the time code generator 5 is used to reproduce the video from the original tape and the master tape at a desired reproduction time.

Furthermore, a video signal switching circuit 10 is provided, and VTR1,
Switch the video signals from 2 and 4 to monitor 11
and 12. In this case, a reproduced video signal from the master VTR 4 is supplied to the monitor 11, and a reproduced video signal from the VTR 1 or 2 is selectively supplied to the monitor 12. Further, 13 indicates a video signal output terminal, and the video signal obtained at this 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 Tcy ₁ indicates the time code of the first editing point of the master tape of master VTR 4. Further, α is the pre-roll time expressed by a time code, and x is the ratio between the tape running speed set by the search dial 14 and the normal tape running speed.

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 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 4 are simultaneously phase-adjusted and started at a predetermined speed in the playback state, and the current time code Tx of VTR1 and
The current time code Ty of VTR4 is sent to each CPU3.
supply to. 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 In relation to △(Z)
, set the tape running speed of VTR1 to the speed of 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, △(Z') is calculated in relation to the value of Z'.
, set the tape running speed of VTR 1 to the speed of X + △ (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. Furthermore, it is possible to determine editing points in broadcasting and register them in the memory 9 as a program.

In the above embodiment, the master VTR4 and
We have described the example of determining the editing point between VTR1 and master VTR4 and VTR1 and VTR2 in the same way.
It is easy to understand that a desired editing point can be mutually determined in the same manner between or among a plurality of VTRs.

As described above, according to the present invention, the editing point can be determined at any tape running speed, so that the editing point can be determined easily and with high accuracy, and good videotape editing can be performed. Furthermore, according to the present invention, editing points in broadcasting can be determined and registered in the memory 9 as a program.

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 an embodiment of the editing apparatus of the present invention, and FIG. 2 is a flowchart for explaining the present invention. 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)

[Scope of Claims] 1. First and second video signal reproducing devices, and desired video signal recording media on the first and second video signal recording media loaded in the first and second video signal reproducing devices, respectively. editing point setting means for setting first and second editing points; and editing point setting means for setting first and second editing points; current playback point detection means for detecting a second current playback point; 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 Dy, and based on this difference, the playback speed of one of the first and second video signal playback devices is adjusted so that the difference between Dx and Dy becomes zero. a first control means for controlling the reproduced video signal from the first video signal reproducing device on the front side of the first and second editing points, and the reproduced video signal from the first video signal reproduction device on the rear side of the first and second editing points; In an editing device comprising a monitor that switches and displays the reproduced video signal from the second video signal reproduction device, the reproduction speed of the other video signal reproduction device of the first and second video signal reproduction devices is controlled. An editing device comprising a second control means for controlling the speed to a desired speed, so that confirmation rehearsal near the editing point can be performed at the desired playback speed.