Buzz reduction for intercarrier type television sound detection

Details Buzz reduction for intercarrier type television sound detection Buzz reduction for intercarrier type television sound detection

1982-11-30

1985-04-23

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358198, H04N 562, H04N 560

Patent

active

045133239

ABSTRACT:
A television receiver in which a modulated IF picture carrier, after passing through a sloped attenuation region of an IF amplifying stage, is used to produce an intercarrier sound signal. An audio buzz reduction system is provided in which phase modulation of the IF picture carrier caused by the slope of the IF stage is prevented from being transferred to the intercarrier sound signal by passing the modulated IF picture carrier through an oppositely sloped attenuation portion of a filter before it is used to generate the intercarrier sound signal.

REFERENCES:
patent: 4163196 (1979-07-01), Hongu et al.
patent: 4237485 (1980-12-01), Saito et al.
patent: 4263611 (1981-04-01), Gibson
patent: 4349842 (1982-09-01), Apeldoorn et al.
"RCA Television Service Data", Chassis CTC 108 Series, p. 25.

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