High-speed playback for videodiscs

Details High-speed playback for videodiscs High-speed playback for videodiscs

1981-10-02

1983-11-08

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358907, 358312, H04N 5783, G11B 2108

Patent

active

044145845

ABSTRACT:
As many as four kinds of high-speed playback of a videodisc can be selected with only two operating switches. This is accomplished by extracting the vertical synchronizing signal from the composite video signal read from the videodisc and, based on this vertical synchronizing signal, producing more than one pulse delayed by a prescribed time. The vertical synchronizing signal and/or the delayed pulses are gated by independently outputted forward or reverse indicator signals for high-speed playback. High-speed playback is executed by forcibly driving the target tracking unit one track at a time in the direction designated by the indicator signal more than twice during the substantial vertical blanking time of the television image corresponding to the gated vertical synchronizing signal and/or the delayed pulses. When the forward and reverse indicator signals are both generated, an even higher speed playback is obtained.

REFERENCES:
patent: 4210938 (1980-07-01), Heitmann et al.

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