Television receiver raster blanking system

Details Television receiver raster blanking system Television receiver raster blanking system

1976-05-26

1977-05-03

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 324

Patent

active

040218490

ABSTRACT:
A cathode ray tube raster in a television receiver is blanked for selected channels chosen to receive audio information by a bias circuit coupled to a video signal source connected to a cathode ray tube wherein the bias circuit provides a given bias potential to the cathode ray tube when a modulated picture carrier signal is detected and a different bias potential blanking the raster of the cathode ray tube when an unmodulated picture carrier signal is detected.

REFERENCES:
patent: 3573365 (1971-04-01), Anderson
patent: 3686430 (1972-08-01), Parker

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