Apparatus for distributing television signal with stereophonic a

Details Apparatus for distributing television signal with stereophonic a Apparatus for distributing television signal with stereophonic a

1977-01-14

1979-04-03

Griffin, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358144, H04N 700, H04N 704

Patent

active

041480600

ABSTRACT:
A system for distributing a television program with stereophonic audio via satellite includes a video base band, and audio left and right signals each frequency modulating spaced subcarriers. Special low level tone pulses are transmitted via the respective subcarriers when a television program with stereophonic audio begins and when it ends.
Those receiving stations wishing to distribute stereo audio (as via cooperating local television and FM stations) merely detect and disseminate each subcarrier modulation. Receiving stations desirous of distributing monaural audio recognize the stereo program signalling pilot, and enable a left and right program summing amplifier to restore and furnish a compatable, full monaural audio signal.

REFERENCES:
patent: 3046329 (1962-07-01), Reesor
patent: 3264414 (1966-08-01), Santilli et al.
patent: 3497628 (1970-02-01), Dias
patent: 3860873 (1975-01-01), Ringstad
"The First Nationwide Live Stereo Simulcast Network", SMPTE Journal, vol. 86, Jan. 1977, pp. 9-12.

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