Synchronization of vertical phase of the video signals in a vide

Details Synchronization of vertical phase of the video signals in a vide Synchronization of vertical phase of the video signals in a vide

1991-11-18

1993-09-07

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358149, 358181, H04N 504

Patent

active

052434257

ABSTRACT:
A video system in which synchronization of the vertical phase components of a plurality of video signals is carried out by a plurality of reference signals having substantially the same frequency and substantially a fixed relative phase relationship. Each vertical synchronization signal is locked to one of the reference signals at a phase associated with the measured phase difference between the vertical synchronization signal and a selected one of the reference signals. In this way, all the vertical synchronization signals are brought into phase with one another.

REFERENCES:
patent: 3424866 (1969-01-01), Hathaway
patent: 3525808 (1970-08-01), Brown
patent: 4333103 (1982-06-01), Koiwa
patent: 4599650 (1986-07-01), Wilkinson
patent: 4698678 (1987-10-01), Collins

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