H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/167 (2006.01)
Patent
CA 2063105
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.
L'invention est constituée par une méthode et un appareil qui utilisent le brouillage de la bande latérale pour protéger les signaux de télévision contre les réceptions non autorisées. Une partie du contenu de la bande latérale du signal est accentuée de façon à rendre le signal inutilisable pour fins de réception. On peut décoder le signal en le faisant passer dans un réseau égalisateur de retards passe-tout passif au site du récepteur.
Hartson Ted
Marland Dale W.
Eagle Comtronics Inc.
Kirby Eades Gale Baker
LandOfFree
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