Scrambled TV-IF signal transmission system

Details Scrambled TV-IF signal transmission system Scrambled TV-IF signal transmission system

1994-06-14

1995-07-04

Barron, Jr., Gilberto

Cryptography

Key management

Having particular key generator

380 19, H04N 716

Patent

active

054307988

ABSTRACT:
A cable TV signal transmission system comprising a Nyquist filter carrier recovery circuit, a mixer, a level shifter and a pre-emphasis circuit for transmitting scrambled TV-IF signals on an FM or digital signal link to a receiver section comprising a de-emphasis circuit, an amplitude modulator circuit and a VSB filter so as to provide to remote TV receivers a scrambled TV-IF signal with correct timing between the video and audio scrambling information.

REFERENCES:
patent: 4034402 (1977-06-01), Brian
patent: 4581765 (1986-04-01), Stec
patent: 4951313 (1990-08-01), Gysel
patent: 4956862 (1990-09-01), Robbins et al.
patent: 5136641 (1992-08-01), Gysel
patent: 5220602 (1993-06-01), Robbins et al.

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