Color separation circuit

Details Color separation circuit Color separation circuit

1982-09-03

1984-08-28

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

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H04N 9535

Patent

active

044686897

ABSTRACT:
A color separation circuit includes a comb filter for generating output signals corresponding to the sum of and difference between a composite input video signal and a signal prepared by delaying the composite input video signal by one horizontal scanning time period. The difference signal from the comb filter is sampled at timings with a phase difference of 90.degree. of a chrominance signal contained therein. By passing through a low-pass filter the signal sampled at a timing corresponding to the 33.degree. phase in each cycle of to chrominance signal, an EQ-chrominance signal is obtained. By passing through a low-pass filter the signal sampled at a timing corresponding to the 123.degree. phase in each cycle of the chrominance signal, an EI-chrominance signal is obtained.

REFERENCES:
patent: 4219842 (1980-08-01), Miller
patent: 4389665 (1983-06-01), Nagao
D. J. Sauer, "Design and Performance of a CCD Comb Filter IC", RCA Review, vol. 41, Mar. 1980, pp. 29-56.
W. A. Lagoni, "A Base-Band Comb Filter for Consumer Television Receivers", IE3 TRNS CE-26, Nov. 1979.

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