Demodulator

H - Electricity – 04 – L

Patent

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Details

H04L 27/22 (2006.01) H04H 1/00 (2006.01)

Patent

CA 2351492

A demodulator having an improved reliability of the decoding of a TMCC signal is used for digital broadcasting receivers for receiving digital broadcasting by layered transmission system. A pseudo-pattern generator (8) generates fixed pseudo-data which involves no error with respect to a main signal after a TMCC signal and maintains the convolution relationship, and inserts the pseudo-data between the TMCC signal and the main signal through a selector (6B) and a selector (6), thereby conducting Viterbi decoding.

La présente invention concerne un démodulateur à fiabilité améliorée dans le décodage d'un signal TMCC utilisé par les récepteurs de radiodiffusion numérique pour recevoir une radiodiffusion numérique via un système de transmission multi-niveaux. Un générateur pseudo-matriciel (8) produisant des données pseudo-fixes ne comportant aucune erreur par rapport à un signal principal suivant un signal TMCC, maintient la relation de convolution, et introduit les pseudo-données entre le signal TMCC et le signal principal par un sélecteur (6B) et un sélecteur (6), effectuant ainsi un décodage de Viterbi.

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