Video disk player including signal switching synchronization

Details Video disk player including signal switching synchronization Video disk player including signal switching synchronization

1989-06-19

1991-08-13

Envall, Jr., Roy N.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358335, 369 50, 360 7301, G11B 1552

Patent

active

050400762

ABSTRACT:
In a video disk player, internal and external synchronization are based on comparing the phases of reproduced and reference pulses. The controlled frequencies responsive to the phase difference are controlled at 4f.sub.sc, where f.sub.sc is the color subcarrier frequency. The control loop for controlling the spindle speed, and therefore setting the synchronization of the read out, operates on the 4f.sub.sc signal, which is frequency divided on the same integrated chip as the spindle servo electronic, to provide the horizontal synchronization control.

REFERENCES:
patent: 4018987 (1977-04-01), Keizer
patent: 4370679 (1983-01-01), Ceshkovsky et al.
patent: 4371899 (1983-02-01), Ceshkovsky et al.
patent: 4376955 (1983-03-01), Reitmier
patent: 4835623 (1989-05-01), Okano et al.

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