JPS58119280A - Control system for editing of video tape recorder - Google Patents

Abstract

PURPOSE:To attain video recording, by providing a picture memory storing a picture signal of one frame for a dynamic picture of a VTR, and picking up one frame of the dynamic picture as a still picture. CONSTITUTION:A VTR write instruction is given from a CPU11 and this instruction is executed at a CPU interface control section 102. The picture signal of one frame of a VTR12 becomes each red, green and blue hue signal from the NTSC signal at the NTSC decoder and written in a picture memory 101 via an A/D converter 103. Thus, the VTR write instruction is outputted at a prescribed period, allowing to write the picture signal of the VTR12 in the memory 101 as one frame still picture for a prescribed period. Each hue data of one frame written in the memory 101 passes through a D/A converter 104 and the NTSC encoder 15, becomes an NTSC picture signal and recorded in the VTR13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a video tape recorder (hereinafter referred to as VTR) editing control system. Especially this invention.

The first
The second VT uses one frame of the VTR video as a still image.
VT that can be used to record to R
The conventional VTR editing control method uses a dedicated VTR editing device. FIG. 1 is a diagram showing a conventional example,
This is a system for two VTRs.

In Fig. 1, 1 is the first unit that records the video before editing.
2 is the 217th VTR that records and plays the edited video.
) VTRs, 3 and 4 are respective VTR (7) monitors, and 5 is a dedicated VTR editing device. The control method for this VTR editing is 1
Set the VTR tape you want to edit into the first VTR1,
While viewing the monitor 3, the start and end points of the video to be edited are determined by the VTR editing device 5, which counts the timer rock noses previously written in the control channel of the VTR tape. - Then, for the second VTR 2, the video from the first VTR 1 is sent from the time when editing starts, and the video is stopped when the first editing ends. I'll let you record later. The editing at this time is the second
This will be explained in more detail with reference to the drawings. In Figure 2, the first
Of the videos A, B, C, etc. recorded on the VTR 1 of , the videos of A and C excluding B are recorded as the second V! An example of editing using the VTR editing device 5 in R2 is shown.

That is, in the conventional method described above, a moving image is recorded on the second VTR 2. In this way, in the conventional method as described above, V
Since the control method for TR editing is for VTR videos, it costs a fee to record one frame (i.e. one frame) of the video from the first VTR 1 as a still image on the second VTR 2. Image memory is not available as a signal holding means. Therefore.

The conventional method described above is a VT
This method is not suitable for controlling VTR editing in which one frame of a moving image is extracted as a still image, which is essential for image processing of R images.

An object of the present invention is to provide a video tape recorder editing control system that is optimal for recording one frame of a moving image as a still image.

According to the present invention, in the video tape recorder editing control method for editing the video of the first video tape recorder and recording it on the second video tape recorder, the first video tape recorder a synchronization signal generator that supplies a reference synchronization signal to the recorder; an image memory into which a video signal corresponding to one frame of the video of the first video tape recorder is written; Video tape recorder footage 1
a computer interface f151J a section capable of writing a video signal corresponding to a frame into the image memory and recording the contents of the image memory on the second video tape recorder; According to.

The computer interface control unit causes the second video tape recorder to record the video of the first video tape recorder.
A control method for tape recorder editing is obtained.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 3 is a block diagram showing an embodiment in which the present invention is applied to a television system in the NTSC direction.

In the figure, 10 is a VTR image processing device, 11 is an electronic r
Computer (CPU), 12 is the first VTR, 13 is the second
+7) VTR, 14 is NTSC decoder, 15 is NTS
C encode/, 16 is time base collector 7 is VT
R monitor changeover switch 18 is a VTR monitor.

In the VTR image processing device 10, 100 is an NTS signal generator #101 is a VTR image memo IJ, 102
103 is a CPU interface control unit, and 103 is an analog/
Digital converter (A/1 converter).

Reference numeral 104 indicates a digital/analog converter (D/A converter). The reference synchronization signal of the NTSC synchronization signal generator 100 is supplied to the first VTR 12, the time base corrector 16 (!:), and the NTSC encoder 15. It is used for the purpose of resynchronizing the video signal that is received by using the reference synchronization signal (i.e., the output signal of the NTSC synchronization signal generator 100) in the VTR image processing device 10.

The NTSC encoder 15 is connected to the VTR image processing device 10.
It is used to convert R (red), G (green), and B (blue) hue signals output from the NTSC video signal into NTSC video signals.

VTR image processing device 10, first VTR 1-2 and first
This is because the time base collector 16 for the VTR operates using the same reference synchronization signal.

V commanded from the CPU interface control unit 102
With the TR write operation, the video signal of the first VTR 12 can be written into the VTR image memory 101 while being synchronized. In reality, a VTR write command is issued from the CPU 11, and this command is executed by the CPU interface control unit 1.02.

Here, the first
VTR 12 (D video signal is NTSC decoder 14
R (red), G (green), B (blue) from NTSC signal
A/1) converter 103
VTR image memo after! This becomes data that can be written to JIOI. Since this video signal is an NTSC signal, the data amount of the video signal for one frame of the first VTR 12 is 480 effective scanning lines, 512 pixels per scanning line, and 8 bits per pixel. Things expressed by each RGB hue signal.

Each RGB hue has (512x480x8) bits. Therefore, the capacity of the VTR image memory 101 is
When the RGB hues are combined, the result is (512 x 480 x 8 x 3 bits).In this way, the video signal from the first VTR 12 is converted into one frame of video signal by the VTR write command issued from the CPU 11. It is decomposed into signals and written to the VTR image memory 101. Therefore, the V
By issuing a TR write command.

The VTR image memory 101 stores the first V at every regular cycle.
The video signal of TR12 will be written as a one-frame still image.

Next, each frame of RGB hue data written to the VTR image memory 101 is transferred to the D/A converter 104.
Then, it passes through an NTSC encoder 15 and becomes a pNTSC video signal. This video signal will be immediately recorded on the second VTR 13. In this case, since the second VTR 13 is used simply to record the video signal sent from the VTR image processing device 10, the synchronization signal for the second VTR 13 needs to be supplied from the NTSC synchronization signal generator 100. Instead, the second VTR 13 can operate using its own internal synchronization signal. Due to this) the second VTR 13 is VH8
(Video Home '/7.fm') system or β (Beta) system can be used.

The above operation will be specifically explained using the editing time chart shown in FIG. In the first VTR 12, the video is broken down into frames as shown in a.

b#cldl... is being recorded. One frame is one second. If VTR write command 0 is issued from the CPU 11 every four frames, in the example shown in FIG. As shown in FIG. 4, the second VTR 13 records the frame until it switches to the next frame. In this way, to the second VTR 13,
The video of i is recorded.

In this way, it becomes possible for the CPU interface control unit 102, which receives the VTR write command from the CPU 11, to record the video of the first VTR 12 onto the second VTR 13.

Here, the VTR monitor changeover switch 17 is set to the first
TR12 or second (DVTR13)
This is a changeover switch used when monitoring on the monitor 18. This VTR monitor changeover switch 17 is.

When finding a video to be edited, the switch is switched to the first VTR 12, and when the edited video is to be played back, the switch is switched to the second VTR 13.

Note that in the above embodiment, NTS is used as the television system.
Although the case where it is applied to the C system has been described, it goes without saying that it can also be applied to other systems (for example, the PAL system and the SECAM system).

As is clear from the above explanation, there are two VTRs according to the present invention.
By using the editing control method, it becomes possible to record one frame of the moving image on the first video tape recorder as a still image on the 72nd video tape recorder according to a command from an electronic computer, This has the effect of greatly contributing to the improvement of image processing technology for video tape recorder images.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a conventional VTR editing control system, FIG. 2 is an editing time chart of the conventional example shown in FIG. 1, and FIG. 3 is a VTR editing control system according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the . FIG. 4 is an editing time chart of the embodiment shown in FIG. Explanation of symbols: 1 is the first VTR, 2 is the second VTR. 3.4 is VTR model, 5 is VTR editing device, 10 is V
TR image processing device; 11 is a computer (CPU); 12 is a first VTR, 13 is a second (7) VTR, 14 is an NTSC decoder, 15 is an NTSC encoder, 16 is a time base collector, 17 is a V'l'R monitor changeover switch, 18 is a v'rR monitor, 100 is an NTSC synchronization signal generator, 101 is a VTR image memory, and 102 is a C
PU interface control unit #103 is a ψ converter,
104 yes converters respectively.

Claims (1)

[Claims] 1. In a video tape recorder editing control method for editing a video of a first video tape recorder and recording it on a second video tape recorder, the first
a synchronizing signal generator for supplying a reference synchronizing signal to the first video tape recorder; an image memory into which a video signal corresponding to one frame of video of the first video tape recorder is written; and instructions from an electronic computer. Accordingly, an electronic device capable of writing a video signal corresponding to one frame of video of the first video tape recorder into the image memory and recording the contents of the image memory into the second video tape recorder. and a computer interface control unit, wherein the computer interface control unit controls the first computer according to instructions from the computer.
A control method for editing a video tape recorder, characterized in that the second video tape recorder records an image of the second video tape recorder.