Tuning system for television signal

Details Tuning system for television signal Tuning system for television signal

1992-07-30

1993-12-28

Cain, David C.

Cryptography

Key management

Having particular key generator

380 10, 380 20, 380 15, H04N 7167

Patent

active

052747069

ABSTRACT:
A tuning system for a television signal in which a TV receiver apparatus and a signal decipher apparatus are connected to each other to receive both of a scrambled TV signal and a non-scrambled signal. The system includes terminating the tuning operation when the signal decipher apparatus detects an identification signal representing the scrambled TV signal, and terminating the tuning operation when the identification signal is not detected by a synchronizing signal for the non-scrambled TV signal is detected.

REFERENCES:
patent: 4771456 (1988-09-01), Martin et al.
patent: 4908860 (1990-03-01), Caprarese et al.
patent: 4910771 (1990-03-01), Hosoya et al.
patent: 5056139 (1991-10-01), Littlefield

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