Video signal processing circuit with comb filter

Details Video signal processing circuit with comb filter Video signal processing circuit with comb filter

1981-04-27

1982-10-19

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 31, 358 36, 358 37, H04N 514, H04N 521, H04N 9535

Patent

active

043553338

ABSTRACT:
A video signal processing circuit using a comb filter which includes a delay circuit having delay time of one or two horizontal scan intervals. The comb filter has first and second mixing means to split chrominance signals and luminance signals. The first mixing means is provided with the input and output signals of the delay circuit in opposite polarity to each other. The second mixing means is provided with an inverted output of the first mixing means and the non-delayed input of the first mixing means. The separated signals from the first and second mixing means are respectively processed through processing circuits such as noise canceller circuits and emphasis circuits. The two processed signals are mixed in a third mixing means to synthesize a composite color video signal without distortion, false signals or delays at the edges of the input signal.

REFERENCES:
patent: 4107736 (1978-08-01), Lowry et al.
patent: 4184174 (1980-01-01), Aschwanden
patent: 4302768 (1981-11-01), Kamura et al.

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