Adaptive device for separating luminance signal and color signal

Details Adaptive device for separating luminance signal and color signal Adaptive device for separating luminance signal and color signal

1988-12-08

1990-03-06

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 40, H04N 978

Patent

active

049070738

ABSTRACT:
A combination of a variable vertical-direction band pass filter and a variable horizontal-direction band pass filter extracts a color signal from a composite color signal. A vertical-direction variation detector detects a difference between levels of the composite color signal at sampling points separated vertically in a picture. A horizontal-direction variation detector detects a difference between levels of the composite color signal at sampling points separated horizontally in a picture. Pass bands of the vertical-direction band pass filter and the horizontal-direction band pass filter are controlled in accordance with output signals from the vertical-direction variation detector and the horizontal-direction variation detector. A luminance signal is derived from the composite color signal and the color signal.

REFERENCES:
patent: 4179705 (1979-12-01), Faroudja
patent: 4205335 (1980-05-01), Nakagawa
patent: 4240105 (1980-12-01), Faroudja
patent: 4847682 (1989-07-01), Tsinberg

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