Method and system for multiplexing signal for transmission

Details Method and system for multiplexing signal for transmission Method and system for multiplexing signal for transmission

1974-09-30

1977-01-18

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

178DIG3, 178 691, 328 63, 332 11R, 358148, H04N 712, H03K 117, H03K 700

Patent

active

040040828

ABSTRACT:
A signal multiplexing method and system for transmitting a television signal by a narrow-band transmission medium incapable of transmitting d.c. components. In this method, a two-polarity pulse train signal consisting of pulses of alternately inverted polarities is subject to pulse modulation by the video information only of the television signal. The horizontal and vertical synchronizing signals indicative of the beginning of a line, field or the like are coded in such a form that some of the successive pulses in the pulse train signal have the same polarity.

REFERENCES:
patent: 2700696 (1955-01-01), Barker
patent: 2996578 (1961-08-01), Andrews
patent: 3048819 (1962-08-01), Helder et al.
patent: 3057962 (1962-10-01), Mann et al.
patent: 3162857 (1964-12-01), Sanders
patent: 3244808 (1966-04-01), Roberts
patent: 3484547 (1969-12-01), Schaefrer

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