JPS60236382A - Video disk player - Google Patents

Abstract

PURPOSE:To search an optional image by counting discrimination signals corresponding to the video signals of a block recorded on a disk up to the designated count value. CONSTITUTION:When an image B behind an image D which is under reproduction by two sheets is searched, a video search key of an operation input part 11 to supply a signal to a control microcomputer 9 to search the image B. Then the computer 9 moves a pickup 2 in order to count first two (c and b) in an area where a discrimination signal S2 is at an H level. Then the pickup 2 is moved further up to a position slightly ahead of a count (a) in the 3rd area where the signal S2 is set at an H level. The reproduction is started at a position (between A and B) for the image B.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a video disc player, and more particularly to a video disc player that can search for any video.

(Prior Art) Conventional video disc players can search for arbitrary programs based on address signals recorded on video discs, but cannot know the recording position of one block of video signal strings. , it was impossible to search for any video.

(Objective of the Invention) The present invention has been made in view of the above points, and is capable of displaying arbitrary images such as the number of frames from the beginning, or the number of frames before or after the image currently being played. The purpose of the present invention is to provide a video disc player that can be searched.

(Structure of the Invention) The video disc player of the present invention plays a video disc on which a discrimination signal corresponding to the recording position of one block of video signal sequence is recorded in advance, and detects and counts this discrimination signal. The apparatus includes a counting means, a specifying means for specifying the count number of the 2-discrimination signal, and a moving means for moving the pick amplifier by the count number specified by the specifying means.

(Example) Hereinafter, two embodiments of the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic block diagram of a video disc player (hereinafter simply referred to as a player) according to the present invention, and FIG. 2 shows a video signal recorded on a video disc (hereinafter simply referred to as a disc) and this video signal. 3 is a timing chart showing the relationship between the recording position and the discrimination signal indicating the recording position.

In FIG. 1, a signal read by a pickup 2 from a disk (not shown) placed on a turntable 1 is appropriately amplified by a preamplifier 3 and then output to an audio signal processing circuit 4.

Here, the signal is FM demodulated and digitally decoded, and is separated into a digital audio signal, a digital video signal, an address signal, and a discrimination signal.

The digital audio signal is converted to an analog audio signal by a digital-to-analog converter and the audio signal output terminal 5.6
is output to.

The digital video signal is output to the video signal processing circuit 7,
Here, it is converted into an analog video signal by a digital-to-analog converter and output to the video signal output terminal 8.

The address signal S1 is output to a control microcomputer (hereinafter simply referred to as a control microcomputer) 9;

Based on this signal, the position of the pickup 2 on the disk surface is known and the pickup 2 is controlled.

As shown in FIG. 2, the discrimination signal S2 is pre-recorded on the disc so as to be at the rHJ level in the portion where the video signal is recorded, and this discrimination signal S2 is output to the control microcomputer 9.

The rotation of the turntable 1 is controlled by a motor servo section 10.
This motor servo section 1
0 is controlled by a control microcomputer 9.

In the figure, reference numeral 11 denotes an operation input section for inputting various operation signals to the control microcomputer 9. This operation input section is 2
Although not shown, there are, for example, 9 play keys, stop keys, fast forward keys, fast reverse keys, and various operation keys for special playback such as still, slow motion, and random access, which are normally provided in this type of player. In addition to the above, it is equipped with a video search key to search for any video.

Note that in FIG. 2, 12 is a power supply circuit that supplies power to each of the above-mentioned parts.

Next, the operation of the video disc player of the present invention will be explained.

To search for video B two images after the video currently being played, operate the video search key on the operation input section 11 and input a command signal to the control microcomputer 9 to search for the image two images after. .

Upon receiving this signal, the control microcomputer 9 first counts two parts of the discrimination signal S2 inputted from the audio signal processing circuit 4 that are at the rHJ level (i.e., C and b).
Move the pink up 2 so as to count (count), and then move the pickup 2 a little before counting the third "H" level (that is, count a). Then, if playback is started from this position (that is, between A and B), it is possible to play back video B two frames later.

Conversely, if you want to search for the video F that is two frames before the video currently being played, first count the portion of the separate signal S2 that is at the rHJ level by one (that is, count e). , move the pickup 2 to a position just before counting the second count (that is, counting f). Then, if playback is started from this position (that is, between E and F), the two previous video F can be played back.

(Effects of the Invention) As explained above, according to the present invention, since the discrimination signal corresponding to one block of video signal recorded on the disk is counted by the specified count number,
The pickup can be moved one block at a time, and any image can be searched.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing one embodiment of the present invention, and FIG.
The figure is a timing chart showing the relationship between a video signal and a discrimination signal indicating the recording position of this video signal. 2...Pickup 4...Audio signal processing circuit 9.
...Control microcomputer 11...Operation input section S2...Discrimination signal 1 idiot

Claims (1)

[Scope of Claims] 1) A video disc on which a discrimination signal corresponding to a recording position of one block of video signal sequence is recorded in advance is played back. and a counting means for detecting and counting the discrimination signal. A video disc player comprising: a designation means for designating the count number of the discrimination signal; and a movement means for moving the pink-up by the count number designated by the designation means.