Cryptography – Key management – Having particular key generator
Patent
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.
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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.
Barron Jr. Gilberto
Synchronous Communications, Inc.
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