Telegraphy – Systems – Simplex-reversing periodic
Patent
1974-11-25
1976-03-02
Britton, Howard W.
Telegraphy
Systems
Simplex-reversing periodic
178DIG3, 178DIG8, 179 15A, 325 38B, 340347AD, H04N 712, H04J 302, G08C 1512
Patent
active
039419240
ABSTRACT:
A single channel transmission and recording system for a scanner having a multi-channel array of dectors having a single delta modulator in the transmission unit and a single delta demodulator in the receiving unit. A plurality of analog signals, such as video signals sensed by infrared detectors, are each fed to an associated channel having an associated switch circuit. A suitable switch logic generator samples the switches in successive ascending order and subsequently in successive descending order. The sampled analog signals of each channel are fed to a signal delta modulator which converts them to a serial train of digital signals. A synchronizing code generator generates a synchronizing code word which is transmitted with the serial train of digital signals to a receiving station where the serial train of digital signals is reconverted to an analog signal similar to the sampled analog signals for display on a suitable device such as a cathode ray tube. A decoder decodes the synchronizing code word to initiate the frames of scan of the cathode ray tube and a suitable counter responsive to the decoder controls the sweep of the frames of scan in accordance with the sampling of each of the channels in successive ascending order and subsequently in successive descending order.
REFERENCES:
patent: 3585440 (1971-06-01), Lee
patent: 3755624 (1973-08-01), Sekimoto
patent: 3800225 (1974-03-01), Meares
patent: 3804976 (1974-04-01), Gard
Britton Howard W.
Northrop Corporation
Sokolski Edward A.
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