Chroma preference control for vir automatic operation

Details Chroma preference control for vir automatic operation Chroma preference control for vir automatic operation

H - Electricity

04

N

350/61

H04N 9/64 (2006.01)

Patent

CA 1093203

38-TR-9448 ABSTRACT OF THE DISCLOSURE Viewer preference adjustment of saturation is realized in a VIR-controlled color television receiver by provision of a closed loop control circuit exclusive of the RGB matrix. During the presence of the VIR signal a control signal is generated within the closed loop that controls the chrominance-to-luminance ratio of the chrominance and luminance signals applied to the RGB matrix and to a blue matrix contained within the closed loop. Adjustment of the level of either the luminance signal or the chrominance signal applied to the blue matrix affects the control signal which in turn adjusts the chrominance-to-luminance ratio to compensate and thereby bring about a shift in the levels of the red, green and the blue signals at the output of the RGB matrix to change the saturation of the color picture.

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