Television receivers

Details Television receivers Television receivers

1981-08-31

1983-11-22

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358167, H04N 552

Patent

active

044172770

ABSTRACT:
An output of a noise canceller which cancels a noise component from within a composite video signal is applied to an input of an AGC detector which generates an AGC voltage for controlling the gain of a video intermediate frequency amplifier. A circuit controlled by a pulse provided from a vertical oscillator, thereby to control the noise cancelling operation of the noise canceller associated with the operation of the AGC detector into an inoperative state in a vertical flyback time is arranged, so that the lockout phenomenon under various receiving conditions of the television receiver can be prevented.

REFERENCES:
patent: 3582551 (1971-06-01), Krug
patent: 3806646 (1974-04-01), Hofmann
patent: 3898380 (1975-08-01), Wilcox
patent: 4030125 (1977-06-01), Bedell et al.
patent: 4032973 (1977-06-01), Haynes

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