Impulse noise reduction system for TV receivers

Details Impulse noise reduction system for TV receivers Impulse noise reduction system for TV receivers

1981-05-11

1982-10-05

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358167, 358 31, 358 21R, 358 36, 360 381, H04N 514, H04N 521, H04N 9535, H04N 576

Patent

active

043530931

ABSTRACT:
A television receiver having circuitry for reducing the effects of impulse noise in the video signal is controlled by impulse noise detection circuitry responsive to the accompanying sound signal. Since impulse noise is relatively broadband it will occur simultaneously in both the broadcast picture and accompanying sound signals. Amplitude variations of the frequency modulated sound signal are indicative of the presence of noise, which variations are detected and utilized to generate a control signal whenever the noise amplitude exceeds a predetermined threshold.

REFERENCES:
patent: 2996576 (1961-08-01), Dolby
patent: 3241078 (1966-03-01), Jones
patent: 3697685 (1972-10-01), Lunn
patent: 3806646 (1974-04-01), Hofmann
patent: 4158209 (1979-06-01), Levine
patent: 4199780 (1980-04-01), Taylor
patent: 4203134 (1980-05-01), Christopher et al.
Ser. No. 44,364 filed 6/1/79, Fuhrer, "Defect Compensation for Color Television".

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