Method and apparatus for scrambling a television signal

Details Method and apparatus for scrambling a television signal Method and apparatus for scrambling a television signal

1982-04-23

1989-02-21

Buczinski, Stephen C.

Cryptography

Key management

Having particular key generator

380 17, H04N 7167

Patent

active

048072850

ABSTRACT:
An in-band television signal scrambling method and apparatus are disclosed which employ a scrambler which receives and scrambles a television signal by suppressing the amplitude of the horizontal synchronizing signals contained therein to a point below the "black" level and which generates whiter-than-white timing pulses in the scrambled television signal for use by a descrambler in reconstructing the suppressed amplitude horizontal synchronizing signals, and one or more descramblers for detecting the whiter-than-white timing pulses in the scrambled television signal and generating therefrom switching signals for a switchable attenuator through which the scrambled television signal passes. The attenuator boosts the amplitude of the suppressed amplitude horizontal synchronizing signals relative to the remainder of the scrambled television signal, thereby restoring the scrambled television signal to an unscrambled condition.

REFERENCES:
patent: 3813482 (1974-05-01), Blonder
patent: 4012093 (1977-03-01), Crane
patent: 4064536 (1977-12-01), Saeki et al.
patent: 4084870 (1978-04-01), Laserson et al.
patent: 4163252 (1979-07-01), Mistry et al.
patent: 4163253 (1979-07-01), Morio et al.
patent: 4222068 (1980-09-01), Thompson
patent: 4290661 (1981-09-01), Burns
patent: 4319273 (1982-03-01), Nossem
patent: 4338628 (1982-07-01), Payne et al.

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