Digital video modulation apparatus

Details Digital video modulation apparatus Digital video modulation apparatus

1973-08-13

1976-02-17

Richardson, Robert L.

Telegraphy

Systems

Simplex-reversing periodic

325182, 332 37R, 332 9R, H04N 540

Patent

active

039393038

ABSTRACT:
A modulator for producing a digital sub-carrier amplitude modulated by a video or other modulating signal comprises sampling means for sampling the modulating signal at twice the process carrier frequency, and selector means for feeding the samples to an output with alternate samples changed in value whilst preserving their timing relative to the remaining samples.

REFERENCES:
patent: 3548342 (1970-12-01), Maxey
patent: 3793597 (1974-02-01), Toman

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