Video cipher processing system

Details Video cipher processing system Video cipher processing system

1981-07-27

1984-01-31

Buczinski, S. C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358123, H04N 716, H04K 104

Patent

active

044293313

ABSTRACT:
A video cipher processing system comprising a detecting means for detecting average tone variation of TV video signals, an extracting means for extracting at random at least some of outputs from the detecting means as a result of the detection and a ciphering means for ciphering video signals by inverting or non-inverting polarities of video signals in response to outputs extracted at random by the extracting means.

REFERENCES:
patent: 4308556 (1981-12-01), Osaka
patent: 4340906 (1982-07-01), Toonder et al.

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