Adaptive comb filter circuit including a plurality of filters an

Details Adaptive comb filter circuit including a plurality of filters an Adaptive comb filter circuit including a plurality of filters an

1989-07-13

1990-11-20

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 31, 358 36, H04N 978

Patent

active

049722590

ABSTRACT:
A moving detection circuit which has a difference level generator which includes at least a frame delay circuit, and a vertical correlation detector which is connected to the difference signal generator and including a plurality of filters connected to the difference signal generator. A switching circuit for selecting one of the plurality of filters is provided and a control circuit is connected to the vertical correlation detector so as to control the switching circuit in response to the output level of the vertical correlation detector.

REFERENCES:
patent: 4616254 (1986-10-01), Harwood et al.
patent: 4617589 (1986-10-01), Weckenbrock
patent: 4686561 (1987-08-01), Harwood et al.
patent: 4700232 (1987-10-01), Abt et al.
patent: 4809060 (1989-02-01), Saeki

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