Recording apparatus coding circuit for an image signal and corre

Details Recording apparatus coding circuit for an image signal and corre Recording apparatus coding circuit for an image signal and corre

1975-08-05

1977-01-04

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 14, H04N 942, H04N 902, H04N 576

Patent

active

040018750

ABSTRACT:
The image signal is divided into first and second component signals respectively occupying a lower and a higher frequency band, and the second component signal is translated into the lower frequency band by means of a modulator fed by an oscillator, after which the two component signals are alternately directed, each for the duration of a frame period, to the output of the circuit, bursts of the output signal from the oscillator being added, during the horizontal fly-back intervals, to the frequency translated signal. In the decoding circuit, which is designed to simultaneously receive the signals derived from two reading units, the second of which delivers the recorded signal time shifted by a frame period relatively to the other, the second component signal is retranslated into the higher frequency band by a modulator fed by an oscillator synchronised by mean of the recorded bursts.

REFERENCES:
patent: 2236502 (1941-04-01), Goldsmith
patent: 2696523 (1954-12-01), Theile
patent: 2734937 (1956-02-01), Beste
patent: 3392233 (1968-07-01), Houghton
patent: 3456071 (1969-07-01), Jackson et al.
patent: 3869706 (1975-03-01), Peltier
Noll, Television For Radiomen, The MacMillan Company, New York, 1955, pp. 224-227.

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