Video signal scrambling system employing full line reversal and

Details Video signal scrambling system employing full line reversal and Video signal scrambling system employing full line reversal and

1985-10-31

1987-05-05

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

358 19, 358326, H04N 7167

Patent

active

046636595

ABSTRACT:
A memory reverses the sequence of samples of selected lines of a composite video input signal without separating the color burst and chrominance components of the lines thereby preserving chroma-burst phase integrity of scrambled lines. A burst inserter adds a second color burst component to the normal and reversed sequence lines to preserve the secrecy of the scramble code. A descrambler includes a memory for restoring the sample sequence and removing the extra color burst component.

REFERENCES:
patent: 3379825 (1968-04-01), Banning, Jr.
patent: 4070693 (1978-01-01), Shutterly
patent: 4405942 (1983-09-01), Block et al.

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