White balance control circuit

Details White balance control circuit White balance control circuit

1979-03-05

1980-08-26

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 9535

Patent

active

042198410

ABSTRACT:
A white balance control circuit for an encoded composite color television signal is disclosed in which three primary color signals of green (G), blue (B) and red (R) are matrixed to be mixed color signal components, color difference signals of R-G and B-G are provided from the mixed color signal components, and gain control circuits provided on the signal transmission paths of two primary color signals of R and B are so controlled in their gains that the color difference signals become zero, when the white balance adjustment is done.

REFERENCES:
patent: Re28774 (1976-04-01), Kubota

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