Adaptive video descrambling system

Details Adaptive video descrambling system Adaptive video descrambling system

1983-06-14

1985-12-31

Buczinski, S. C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358114, H04N 7167

Patent

active

045624658

ABSTRACT:
A television signal is scrambled by suppressing horizontal and vertical synchronizing signals while leaving unsuppressed a reference level during a selected reference interval. Descrambling of the received scrambled signal is achieved by comparing the unsuppressed reference level with the suppressed synchronizing signals and by adding a level representative of that comparison to the suppressed synchronizing signals, thereby to restore the latter to their proper levels.

REFERENCES:
patent: 3530232 (1970-09-01), Reiter et al.
patent: 4075660 (1978-02-01), Horowitz
patent: 4222068 (1980-09-01), Thompson

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