JPS58115669A - Editing device - Google Patents

Abstract

PURPOSE:To decide on an editing point easily, by making the tape running speed of reproduction different from that of recording. CONSTITUTION:Data on the speed ratio (x) between an original and a master tape at editing positions, time codes Tcx and Tcy at the editing points, etc., are supplied to a CPU3. Then, VTRs 1 and 4 are adjusted in phase to start reproduction at a prescribed speed, and the current time code Tx of the VTR1 and the current time code Ty of the VTR4 are supplied to the CPU3 to decide on an expression I. When the expression does not hold, such calculation that Z=¦Tcy-Ty¦-¦Tcx-Tx¦is carried out to generate DELTAZ or DELTAZ' in relation to the value of Z at this time; and the tape running speed of the VTR1 is set to X-DELTAZ to equalize the movement distance Dy of the master tape corresponding to¦Tcy-Ty¦to the movement distance Dx of the original tape corresponding to¦Tcx-Tx¦. When the expression holds, Dx=Dy and the VTR1 is put in X- fold speed running operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an editing device suitable for use, for example, in editing a videotape, and is intended to facilitate the determination of editing points when editing a videotape.

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

In Fig. 1, (1) and (2) respectively show helical medium-Yang video tape recorders (hereinafter referred to as VTRs) that play back the original tapes that were shot, and basically only one is enough. Must see again! In such vrms (1) and (2), two or more units may be provided depending on the situation.
In addition to normal normal playback, it is possible to perform playback at a speed different from normal speed, such as slow playback, double speed playback, still playback, etc. There is. In this case, the reproducing head is provided with position changing means such as an electro-mechanical transducer so that tracking is always performed correctly, so that a normal video signal can be obtained even during the above-mentioned special reproduction.

The VTRs (1) and (2) are 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 OPU) (3).

Also, (4) is the master VTR loaded with the master tape.
This master V'l'R (4) is also configured to be able to perform slow playback, double speed playback, still playback, etc. in addition to normal running, and also has a built-in time code readout circuit. The time code issued is 0P
Supplied to U(3).

Furthermore, a reference time code is supplied from the reference time code generator (5) to the 0PU (3). Further, the contents of the time code generator (5) can be preset to a predetermined value by a signal from the CPU (33).

And from 0PU13) each V'l'R(11% (2
), (4) vs. 1, VTR control interface circuit (6)? A deep running control signal and a recording/reproducing control signal are applied through the oscilloscope. On the other hand, each vrR(8(2),
From (4), the operation mode signal is passed through this V'l'R control ink 7 ace circuit (6) t- to 0PU (33
supplied to

Also, the speed ratio at the editing point of the original tape x1 The time code TCX% of the editing point of the desired video on the original tape, the desired playback time, the speed ratio at the editing point of the master tape x, f
Data such as time code I[cy of the edit point of the f star tape is supplied from the V'I'R controller (8) to the 0PU 13) via the edit control interface circuit (7).

Furthermore, a memory (9) in which the operation program of 0PU (3), etc. is written is provided, and from this memory (9), the processing operation of 0PU (3) is performed by the O signal, and the 0PtT
Data etc. from (3) are stored in this memory (9).

For example, 7 in FIG.
5-A processing program as shown in the chart is written. This program is a time code generator (5)
This indicates a place to play back the footage from the original tape and the master tape at the desired playback time using the reference time code from the original tape.

Furthermore, a video signal switching circuit Ql is provided, and V'l'R(
The video signals from 1), (2) and (4) are switched and supplied to monitors I and Q2. In this case, the reproduced video signal from the mask VTR (4) is supplied to the monitor aυ, and the reproduced video signal from the VTR (1) or (2) is selectively supplied to the monitor ○. Further, I can be a video (IIT output terminal), and the video signal obtained at this video signal output terminal 03 can be broadcast.

Next 4c -t x t -V T R (4) and V'l'
The case where mutual editing points are determined with R(1) will be explained.

When determining the editing point, use the full dial QJ of the VTR controller (8).V'l'R(1)% (4)
C)? - You can arbitrarily change the traveling speed of the keyboard, and also use the keyboard α.
Repeat the [Yes] key to enter edit points, etc.

Here, the time of the first editing point of the original tape of the Tcx Fi VTR (1); -do% TCYs indicates the time code of the first editing point of the master tape of the iStar VTR (4), respectively. Further, α is the pre-roll time expressed by a time code, and x is the ratio between the tape running speed set with the search dial I 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 original tape pre-roll point TCXI-αX and stopped, and the master VTR (4) is transferred to the original tape pre-roll point TCXI-αX.
t Y star tape pre-roll point '1'C)'1-
Transfer it to αX and stop it. Then VTR (1) and (4)
The current time code T of V'l'R (1) and the current time button TV ! of V'l''R (4) are both 0.
Supply to PU (3). Next, in 0PU(3), l
Tcy-Tyl + I 'l'cx-'I'x I
is determined and the left side is larger than the right side], then Z −I T
cy-fil, j −j 'I'cx-'l'x1 is calculated, and at this time, create Δ<z> in series with the zO value,
Let the tape running speed of VTR (1) be X-Δ(Z), and the master tape movement distance Dy corresponding to l T (y - Ty The distance 111Dx is made equal to the distance 111Dx.

In this case, when the value on the right side is larger than the value on the left side, Z'= l Tcx −Tx l I Tcy −
Ty 1 is calculated, then Δ(
2') and set the tape running speed of VTR (11) to
(2'), 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
Since , and are equal, the vehicle is set to run at vrB(1)tX times the speed. In this state, while looking at the monitors αυ and a3, the first editing point and expansion editing point of the master tape and original tape are found, entered, and stored as a program in the memory (9). The above-mentioned editing point determination is repeated nine times until a stop command is issued, and the desired program is constructed. In FIG. 2, the symbol 1 is used to indicate both forward mode and reverse mode.

In this case, since the tape running speed of 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 store them as a program in the memory (9).

In the above-mentioned embodiment, the master VTR (4) and the VTR
(1), but in the same way, master VTR (4) and VTRs (1) and (2)
It is easy to understand that a desired editing point can be mutually determined in the same way among a plurality of VTIILs that are connected to each other or more than that.

As described above, according to the present invention, the editing point can be determined at any tape running speed, which makes it easy to determine the editing point, and allows for highly accurate videotape editing. obtain. Furthermore, according to the present invention, it is possible to determine editing points in broadcasting and to register them as a program in the memory (9).

It goes without saying that the present invention is limited to the above-described embodiments, and that various other configurations may be taken without departing from the gist of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the editing device of the present invention, and FIG.
The figure is a flowchart for explaining the present invention. (1) and (2) are husband k V'I'lL, +3) is O
PU, (4) is master VTRs (8) is VTR=
77) Laura, (9) is memory, Oυ and (13
are each a monitor. Figure 1.

Claims (1)

[Claims] Has #11 and #I2 VTRt, armpit 1+7) VTR
The edit point on the first tape loaded in and this first VT
The moving distance of the first tape, which is the difference between R and the current time, is D.
If x, the wire 2 loaded in the second V'l'H in the nest is
When the moving distance of the second tape is tDY, which is the difference between the edit point on the tape and the current point of this second VTR, the first and second Both VTBt-words are put into the playback state together, and the tape running speed f in the cough playback state can be made different from the tape running speed (normal speed) at the time of recording,
The editing device is characterized in that editing points other than the above in the first and second V'PR can be determined mutually in this reproduction state.