Buzz cancelling system for television receiver

Details Buzz cancelling system for television receiver Buzz cancelling system for television receiver

1979-01-15

1980-12-02

Safourek, Benedict V.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358198, 455304, 455305, H04N 560

Patent

active

042374855

ABSTRACT:
A television receiver in which video IF signal is detected to produce a sound IF signal which is then detected to produce a sound signal, while at the same time video signal is produced by detecting the video IF signal. A buzz cancelling system is provided in which phase-modulated component of the video IF signal is detected or, alternatively, the detected video signal is differentiated thereby to produce a buzz cancelling signal which is then synthesized with the sound signal to cancel out the buzz component contained therein.

REFERENCES:
patent: 2750441 (1956-06-01), Schlesinger
patent: 2901536 (1959-08-01), Thomas, Jr. et al.
patent: 3538245 (1970-11-01), Parker
patent: 3798367 (1974-03-01), Schneider

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