Method and device for secure transmission and of television pict

Details Method and device for secure transmission and of television pict Method and device for secure transmission and of television pict

1984-03-19

1986-12-30

Buczinski, Stephen C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358123, H04N 7167

Patent

active

046333100

ABSTRACT:
A process for scrambling and unscrambling video signals during transmission begins with a sampled line of video signals. The line is divided into adjacent segments, each of which has at least two samples. The dividing point between the two segments is defined in a pseudo-random manner, synchronously in the transmission and the reception. One of the segments is transmitted in a reversed manner. Upon reception, it is returned into its original direction.

REFERENCES:
patent: 4070693 (1978-01-01), Shutterly
patent: 4245246 (1981-01-01), Cheung
patent: 4266243 (1981-05-01), Shutterly
patent: 4389671 (1983-06-01), Posner et al.
patent: 4405942 (1983-09-01), Block et al.

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