Burst phase correction system for video descrambling

Details Burst phase correction system for video descrambling Burst phase correction system for video descrambling

1991-08-08

1993-05-18

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 14, 380 15, H04N 7167

Patent

active

052127230

ABSTRACT:
A method and apparatus for synchronizing a randomized video signal to a phase-locked sampling system. The phase-locked system is part of a scrambling apparatus capable of scrambling and subsequent descrambling of video signals recorded on videotape recorders which undesirably introduce time-base errors into the luminance/chrominance phase relationship. These time-base errors are removed without use of a time-base corrector by programmable delay line memory circuitry which introduces a programmable amount of delay into the video path. The delay line includes a programmable length FIFO memory module.

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