Vertical picture centering circuit

Details Vertical picture centering circuit Vertical picture centering circuit

1984-03-26

1986-08-19

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358158, H04N 504

Patent

active

046072837

ABSTRACT:
The present invention discloses a device and method for compensating for the time lag associated with circuitry within the television receiver when recognizing vertical sync. Accordingly, one aspect of the present invention introduces a static phase correction into the vertical drive sequence for a standard signal so that the television picture is more nearly vertically centered on the screen. Additional aspects of the invention provide for compatibility with other circuits in the television receiver. Specifically, a delay generator coordinates with the phase correcter and other phase and frequency monitoring circuits so that the receiver is not needlessly triggered into nonstandard operation.

REFERENCES:
patent: 4025951 (1977-05-01), Eckenbrecht
patent: 4298890 (1981-11-01), Lai et al.

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