Enhanced scrambling method and system for TV signals

Details Enhanced scrambling method and system for TV signals Enhanced scrambling method and system for TV signals

1987-02-24

1988-12-06

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 15, 380 16, H04N 7167

Patent

active

047900105

ABSTRACT:
A television signal transmission system includes a cable head-end having a scrambler for scrambling a television signal and a subscriber decoder having an unscrambler for unscrambling the television signal in response to data signals from the transmitter. The unscrambler in the receiver is operated to unscramble the scrambled signal for authorized subscribers and to further scramble the scrambled signal for unauthorized subscribers.

REFERENCES:
patent: 3777053 (1973-12-01), Wittig et al.
patent: 3899633 (1975-08-01), Sorenson et al.
patent: 4039954 (1977-08-01), den Toonder
patent: 4232396 (1980-11-01), Grimes
patent: 4317213 (1982-02-01), DiLorenzo
patent: 4353088 (1982-10-01), den Toonder et al.
patent: 4396946 (1983-08-01), Bond
patent: 4510623 (1985-04-01), Bonneau et al.
patent: 4590519 (1986-05-01), Zelenz
patent: 4599646 (1986-07-01), Cottam
patent: 4636852 (1987-01-01), Farmer

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