Subscription TV audio carrier recovery system

Details Subscription TV audio carrier recovery system Subscription TV audio carrier recovery system

1977-05-11

1979-03-20

Buczinski, S. C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358118, 358120, 358122, H04N 144

Patent

active

041457170

ABSTRACT:
A subscription TV decoder for processing encoded audio and video signals in which the TV program audio information is received as an audio subcarrier includes means for decoding the video signal, a filter for separating the decoded video and audio signals, and a filter for separating the audio signal from the audio information subcarrier. The audio information subcarrier is multiplied to raise it to the frequency of the audio signal and is then recombined with the decoded video signal.

REFERENCES:
patent: 3081376 (1963-03-01), Loughlin et al.
patent: 3184537 (1965-05-01), Court et al.
patent: 4002825 (1977-01-01), Lewis
patent: 4024575 (1977-05-01), Harney et al.
patent: 4064536 (1977-12-01), Saeki et al.
J. Markus; Guidebook of Electronic Circuits, Mar. 1975, CH. 39, McGraw-Hill; AU 222.

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