Method and apparatus for securing television signals using sideb

Details Method and apparatus for securing television signals using sideb Method and apparatus for securing television signals using sideb

1991-03-15

1993-02-09

Tarcza, Thomas H.

Cryptography

Cryptanalysis

H04N 7167

Patent

active

051857936

ABSTRACT:
A method and apparatus for securing a television transmission signal from unauthorized reception is disclosed that employs a sideband interdiction technique. A portion of the signal's sideband content is enhanced such that the signal is rendered useless for reception. The signal is decoded by passing the signal through a passive all-pass delay-equalizer network at the site of the receiver.

REFERENCES:
patent: 4074311 (1978-02-01), Tanner et al.
patent: 4099203 (1978-07-01), Garodnick et al.
patent: 4222067 (1980-09-01), Stern et al.
patent: 5022078 (1991-06-01), Zelenz

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