Video theater system and reproducing apparatus therefor

Details Video theater system and reproducing apparatus therefor Video theater system and reproducing apparatus therefor

1993-01-22

1995-01-10

Chin, Tommy P.

Cryptography

Cryptanalysis

358335, 360 331, 360 371, 360 60, 380 10, H04N 7167, H04N 576

Patent

active

053814762

ABSTRACT:
A video theater system has a reproducing apparatus by which picture reproduced from a distribution tape and picture received from a communication satellite are alternatively put on the screen. A scrambled signal transmitted from the communication satellite is converted to a scrambled signal of the same form signal as the scrambled signal reproduced from the distribution tape, thus enabling a common decoder to descramble both the two signals coming from different input routes from each other.

REFERENCES:
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patent: 4945563 (1990-07-01), Horton et al.
patent: 5130810 (1992-07-01), Ryan
patent: 5157510 (1992-10-01), Quan et al.
patent: 5177485 (1993-01-01), Daniel et al.
patent: 5194965 (1993-03-01), Quan et al.
patent: 5208856 (1993-05-01), Leduc et al.
Heinz Griesshaber, "Managing Secure and Confidential Video Distribution"; 1991 IEEE WPM 5.6; pp. 74-75.

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