Timing error detecting and speed control system

Details Timing error detecting and speed control system Timing error detecting and speed control system

1974-06-12

1976-02-24

Cardillo, Jr., Raymond F.

Telegraphy

Systems

Simplex-reversing periodic

178 66DD, 178 66P, 1791001S, 1791004E, 318302, 358 8, 360 73, H04N 576, G11B 1700, H02K 710

Patent

active

039405567

ABSTRACT:
A timing error detecting and speed control system is provided for a video playback system. Signal information which recurs at the horizontal line scanning rate of a prerecorded video signal is derived during playback of a record medium. The signal information is delayed for a period of time which corresponds to the normal duration of one horizontal line of the video signal. An error signal is generated by a comparison of the delayed and undelayed signal information. The error signal is utilized to control a drive mechanism for the playback system. The drive mechanism is adjusted to control the speed of the relative motion between the record medium and a pickup device to reduce timing errors in the recovered video signal.

REFERENCES:
patent: 2334510 (1943-11-01), Roberts
patent: 3046463 (1962-07-01), Johnson
patent: 3424861 (1969-01-01), Delvaux
patent: 3461226 (1969-08-01), Carnt
patent: 3504111 (1970-03-01), Sumida
patent: 3505466 (1970-04-01), Prochnow
patent: 3560635 (1971-02-01), Bruch

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