Television receiver audio channel operating according to the int

Details Television receiver audio channel operating according to the int Television receiver audio channel operating according to the int

1981-05-08

1983-06-14

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 562

Patent

active

043886507

ABSTRACT:
In a television receiver for receiving a signal including an audio IF carrier and a video IF carrier modulated with picture information, the receiver having an audio channel operating according to the intercarrier principle and including a mixing device connected for combining the carriers for generating an intercarrier frequency signal by mixing the audio IF carrier with a mixed carrier constituted by the video IF carrier from which picture information modulation has been removed, there is provided a switch device connected for supplying the video IF carrier to the mixing device only during periods when the video IF carrier is free of picture information modulation.

REFERENCES:
patent: 2505843 (1950-05-01), Smith
patent: 3061674 (1962-10-01), Janssen et al.
patent: 3961135 (1976-06-01), Ohyama et al.
patent: 4258391 (1981-03-01), Papay
M. Rehak et al., Quasi-Paralleltonkanal fur storungsfreien Fernsehton, Grundig Technische Informationen 3/79, pp. 106-109.

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