Video signal processing circuit

Details Video signal processing circuit Video signal processing circuit

1989-05-01

1990-05-15

Shepperd, John W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358158, 358320, 358329, 358337, 360 75, 360 361, 375120, H04N 504

Patent

active

049262602

ABSTRACT:
In order that one clock signal generator in a digital video signal processing circuit comprising a line-coupled clock signal generator and using, for example one or more field memories is sufficient for writing and reading these memories and can still process a signal from a video recorder, the control loop of the clock signal generator uses a comb filter circuit which rapidly corrects regular variations in an output signal of a phase detector of the control loop, which variations are caused by the head drum of the video recorder, without having to adapt the proportioning of a conventional loop filter circuit.

REFERENCES:
patent: Re31326 (1983-07-01), Amery et al.
patent: 4195309 (1980-03-01), Christopher et al.
patent: 4740944 (1988-04-01), Verboom
patent: 4851910 (1989-07-01), Kawai et al.

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