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Title:
SATURATION AND CONTRAST CONTROL CIRCUIT
Document Type and Number:
WIPO Patent Application WO/1982/000934
Kind Code:
A1
Abstract:
A chroma processing circuit is branched from the output of a contrast control circuit connected to the video frequency detector circuit in a saturation and contrast control circuit of a color television receiver. The control signal for the contrast control circuit is released during the burst period, thereby controlling the contrast and the saturation with the control signal. The saturation and the contrast can be controlled with a single gain control circuit, and the control characteristic curves of the contrast control circuit and the chroma processing circuit can be matched.

Inventors:
HOSOYA N (JP)
Application Number:
PCT/JP1981/000222
Publication Date:
March 18, 1982
Filing Date:
September 08, 1981
Export Citation:
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Assignee:
SANYO ELECTRIC CO (JP)
HOSOYA N (JP)
International Classes:
H04N5/57; H04N9/68; H04N9/77; (IPC1-7): H04N9/36; H04N9/535
Foreign References:
JPS513705Y11976-02-03
US3715463A1973-02-06
Other References:
See also references of EP 0058728A4
Download PDF:
Claims:
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