Video signal processing system with selective signal extraction

Details Video signal processing system with selective signal extraction Video signal processing system with selective signal extraction

1991-03-13

1992-10-13

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 978

Patent

active

051555832

ABSTRACT:
A video signal processing system for use in an apparatus that handles a composite color television signal having therein frequency-multiplexed luminance and chrominance signals frequency-multiplexed in the composite color television signal are separated, comprises: remark picture element signal extracting circuitry for taking part of the composite color television signal as a remark picture element signal and extracting the remark picture element signal from the composite color television signal; reference picture element signal extracting circuitry for taking the composite color television signal whose chrominance signal frequency-mutliplexed therein is of the reverse phase to the chrominance signal frequency-multiplexed in the remark picture element signal as a reference picture element signal and extracting a plurality of the reference picture signals from the composite color television signal; selecting circuitry for selecting out of the plurality of reference picture element signals extracted by the reference picture element signal extracting circuitry the one which takes a median value and producing it; and separating circuitry for separating the luminance signal and chrominance signal frequency-multiplexed in the selected reference picture element signal by using the remark picture element signal extracted by the remark picture element signal extracting circuitry.

REFERENCES:
patent: 4524382 (1985-06-01), Tanaka et al.
patent: 4626895 (1986-12-01), Reitmeier

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