H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 1/06 (2006.01) H04B 1/10 (2006.01) H04J 1/08 (2006.01) H04J 1/12 (2006.01) H04N 7/10 (2006.01) H04N 7/24 (2006.01) H04N 7/58 (2006.01)
Patent
CA 2095316
A frequency allocation is provided to minimize the effects of amplifier distortion in a mixed analog and digital cable television system. In particular, successive digital channel signals having a bandwidth substantially equal to .omega. are separated by a pair of adjacent analog channel signals, each having a bandwidth substantially equal to .omega.. In an illustrated embodiment, the analog and digital channel signals comprise amplitude modulated carriers having substantially equal power levels.
L'invention est un dispositif d'attribution de fréquences qui minimise la distorsion produite par les amplificateurs dans les systèmes de télévision par câble mixte, c'est-à-dire en partie analogique et en partie numérique. En particulier, les signaux de canaux numériques successifs qui ont une largeur de bande substantiellement égale à sont séparés par une paire de signaux de canaux analogiques adjacents dont la largeur de bande est substantiellement égale à . Dans une concrétisation illustrée, les signaux des canaux analogiques comportent des porteuses modulées en amplitude de puissances substantiellement égales.
General Instrument Corporation
Ridout & Maybee Llp
LandOfFree
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