Method and apparatus for effecting digital signalling over telev

Details Method and apparatus for effecting digital signalling over telev Method and apparatus for effecting digital signalling over telev

1974-08-15

1976-03-02

Britton, Howard W.

Telegraphy

Systems

Simplex-reversing periodic

H04N 706

Patent

active

039419193

ABSTRACT:
A method and apparatus for effecting digital signalling over a television signal channel is provided. The carrier wave of the television signal is phase shift keyed at the line scanning frequency rate in accordance with the digital information to be signalled. A receiver determines the phase of the said carrier wave during each line of a received television signal relative to a datum phase and a digital signal is generated in accordance therewith.

REFERENCES:
patent: 2326515 (1943-08-01), Bartelink
patent: 2453773 (1948-11-01), Young
patent: 3529081 (1970-09-01), Rider

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