Circuit for reducing noise in a carrier chrominance signal

Details Circuit for reducing noise in a carrier chrominance signal Circuit for reducing noise in a carrier chrominance signal

1983-03-08

1985-12-10

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

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H04N 9535

Patent

active

045583536

ABSTRACT:
A noise reducing circuit for reducing noise in a carrier chrominance signal comprises a bandpass filter supplied with an input carrier chrominance signal, where the bandpass filter has a narrow-band pass band of a center frequency equal to a chrominance subcarrier frequency of the input carrier chrominance signal, a first subtracting circuit supplied with the input carrier chrominance signal and an output signal of the bandpass filter, for carrying out subtraction between the two signals supplied thereto to obtain a noise signal component within the input carrier chrominance signal, an amplitude limiter for limiting the amplitude of an output signal of the first subtracting circuit, and a second subtracting circuit supplied with the input carrier chrominance signal and an output signal of the amplitude limiter, for carrying out subtraction between the two signals supplied thereto to produce a carrier chrominance signal reduced of the noise signal component.

REFERENCES:
patent: 4302768 (1981-11-01), Kamura et al.

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