Color signal processing circuit to reduce cross-color disturbanc

Details Color signal processing circuit to reduce cross-color disturbanc Color signal processing circuit to reduce cross-color disturbanc

1981-10-13

1984-03-06

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 9535

Patent

active

044357257

ABSTRACT:
A composite color video signal including a luminance signal and a carrier chrominance signal multiplexed with the luminance signal is separated by a signal separating circuit to the luminance signal and the carrier chrominance signal. The luminance signal is clipped by a clipping circuit at levels approximating to its black and white peak levels and an output signal of the clipping circuit is shaped to control pulses corresponding to level transitions of the output signal by a wave shaping circuit. A signal attenuating circuit for attenuating the carrier chrominance signals or demodulated color signals in response to color pulses applied thereto is connected in a signal transmission path for receiving the carrier chrominance signal from the signal separating circuit to thereby reduce cross-color and color-fringing components caused at level transitions of the luminance signal.

REFERENCES:
patent: 3634615 (1972-01-01), Sasaki
patent: 4223342 (1980-09-01), Tsuchiya
patent: 4245237 (1981-01-01), Lagoni
patent: 4268855 (1981-05-01), Takahashi
patent: 4276566 (1981-06-01), Parker
patent: 4291330 (1981-09-01), Hirai
patent: 4355333 (1982-10-01), Sato

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