Luminance signal/chrominance signal separating circuit and a noi

Details Luminance signal/chrominance signal separating circuit and a noi Luminance signal/chrominance signal separating circuit and a noi

1990-06-25

1991-09-10

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 36, H04N 978

Patent

active

050478400

ABSTRACT:
A luminance signal/chrominance signal separating circuit comprises a 3 line logical comb filter for Y/C separation. The output of the vertical correlator of the 3 line logical comb filter comprises chrominance signal components and non-correlation components of the luminance signal, whereby the separated luminance signal components have the non-correlation components missing. The non-correlation components within the output of the vertical correlator are extracted by a trap circuit, and added to the separated luminance signal components. This prevents degradation of the oblique resolution of the reproduced luminance signal. The noise reduction circuit in the reproduction mode shares the above 3 line logical comb filter for removing the noise of the reproduced luminance signal.

REFERENCES:
patent: 4524382 (1985-06-01), Tanaka et al.
patent: 4646153 (1987-02-01), Fukuda et al.
patent: 4984069 (1991-01-01), Yamada et al.

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