Automatic gain control of a scrambled video signal

Details Automatic gain control of a scrambled video signal Automatic gain control of a scrambled video signal

1985-12-24

1987-11-10

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 10, H04N 7167

Patent

active

047062851

ABSTRACT:
A television receiver receives a scrambled television signal of the suppressed sync pulse type. The sync pulse is restored by a decoder which provides a sync restored video signal to video signal processing circuits of the receiver, and to automatic gain control circuits of the receiver via an interface network. The interface network develops a control signal with a magnitude related to the magnitude of the restored sync pulse. The control signal is coupled to the automatic gain control circuits for maintaining a desired video signal gain. The disclosed suppressed sync signal processing system permits the use of an uncomplicated and economical decoder, i.e., without integral tuner, AGC and remodulator circuits.

REFERENCES:
patent: 4408225 (1983-10-01), Ensinger et al.
patent: 4509210 (1985-04-01), Kohn
patent: 4554581 (1985-11-01), Tentler et al.

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