Color corrector

Details Color corrector Color corrector

1978-12-18

1980-08-26

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 9535

Patent

active

042198402

ABSTRACT:
An automatic color corrector is disclosed for use in a color television receiver. To enable color correction of chroma signals within a selected range of the fleshtone axis, the outputs of the chroma demodulators are sensed to develop a control signal. In response to the control signal, a color modifier automatically reduces the gain of the (B-Y) demodulator by a predetermined factor. Preferably, the color modifier also adds a predetermined negative (B-Y) component of fixed value to the output of the (B-Y) demodulator. As a result, fleshtone chroma signals which otherwise have an unnatural cast are given a more natural color and the addition of the negative (B-Y) component causes the resultant color correction to be centered about the fleshtone axis.

REFERENCES:
patent: 3749825 (1973-07-01), Moore

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