Vertical synchronization detection system and method

Details Vertical synchronization detection system and method Vertical synchronization detection system and method

1980-04-30

1982-03-09

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 510

Patent

active

043192750

ABSTRACT:
Disclosed is a microcomputer-controlled system and method for detecting a vertical synchronization pulse extracted from a composite synchronization signal provided to a television receiver. Sync pulse voltage level, period and duty cycle are analyzed in terms of predetermined vertical sync criteria in detecting valid vertical synchronization.

REFERENCES:
patent: 3530238 (1970-09-01), Matarese
patent: 3619497 (1971-11-01), Ellis
patent: 3688037 (1972-08-01), Ipri
patent: 3873768 (1975-03-01), Klein
patent: 3899635 (1975-08-01), Steckler et al.
patent: 3925613 (1975-12-01), Kokado
patent: 4084187 (1978-04-01), Schlotzhauer
patent: 4097896 (1978-06-01), Avery
Rzeszewski et al., "A Microcomputer Controlled Frequency Synthesizer for TV", IEEE Transactions on Consumer Electronics, vol. CE-24, No. 2, May 1978, pp. 145-152.

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