Color correction circuit for a color television receiver

Details Color correction circuit for a color television receiver Color correction circuit for a color television receiver

1980-07-14

1981-08-18

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 9535

Patent

active

042850053

ABSTRACT:
A color correction circuit is described for use in a color television receiver of the type which includes a B-Y demodulator and a network for sensing color-difference signals which are representative of hues within a selected range of fleshtones. In the preferred embodiment, the color correction circuit includes a voltage follower which is activated by the sensing network and which is coupled to opposite polarity outputs of the B-Y demodulator. When the network senses the presence of color-difference signals within the fleshtone range, the voltage follower is activated to combine a portion of one B-Y color-difference signal with the opposite polarity color-difference signal so as to develop a resultant B-Y signal of a reduced amplitude. At the same time, an offset current is automatically added to the resultant B-Y signal for off-setting the hues associated with the latter signal toward the fleshtone axis.

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

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