Chroma-preference control for VIR automatic operation

Details Chroma-preference control for VIR automatic operation Chroma-preference control for VIR automatic operation

1976-09-24

1977-11-22

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 10, 358 30, 358 40, H04N 9535

Patent

active

040598381

ABSTRACT:
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 the 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 said chrominance to luminance ratio to compensate and thereby brings about a shift in the levels of the red, green and blue signals outputted by the RGB matrix to change the saturation of the color picture.

REFERENCES:
patent: 3604844 (1971-09-01), Ross
patent: 3673320 (1972-06-01), Carnt
patent: 3950780 (1976-04-01), Freestone

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