System for processing a scrambled video signal

Details System for processing a scrambled video signal System for processing a scrambled video signal

1986-01-15

1987-06-02

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 10, 380 20, H04N 7167

Patent

active

046709045

ABSTRACT:
A television receiver receives a scrambled television signal with a suppressed sync pulse which is restored by a decoder coupled to the receiver. The receiver also includes a noise inverter which alters blanking interval noise pulses below a threshold level to prevent the noise pulses from disrupting the operation of other receiver circuits. The operation of the noise inverter is inhibited when the decoder is operative in the presence of a scrambled signal.

REFERENCES:
patent: 2803700 (1957-08-01), Kroger
patent: 4042959 (1977-08-01), Klein
patent: 4212032 (1980-07-01), Harford

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