Color-difference signal modifying apparatus

Details Color-difference signal modifying apparatus Color-difference signal modifying apparatus

H - Electricity

04

N

350/60

H04N 9/535 (1980.01)

Patent

CA 1073095

ABSTRACT OF THE DISCLOSURE A color-difference signal modifying apparatus for modifying a color-difference signal in a color television receiver. The apparatus gives to a color-difference signal a non-linear characteristic which approximates a theoretical characteristic for completely eliminating both luminance and chromaticity errors of a reproduced color. The apparatus is constituted by a threshold signal producing means which is supplied with a luminance signal to produce a threshold signal proportional to the luminance signal, and a gain reduction means which is supplied with the color-difference signal to reduce the gain to remove a specific portion of the color-difference signal which exceeds the threshold signal level.

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