Trellis decoder of a dtv

H - Electricity – 04 – N

Patent

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Details

H04N 7/64 (2006.01) H03M 13/15 (2006.01) H03M 13/41 (2006.01) H04L 1/00 (2006.01)

Patent

CA 2212098

A trellis decoder uses a branch metric unit, an ASC unit, a maximum likelihood value detector, and a normalization unit in common by time-division method to realize a trellis coding interleaver used in a DTV. The trellis decoder includes path memories, state metric memories and traceback units each as many as required in the trellis coding interleaver.

L'invention porte sur un décodeur en treillis se servant d'une unité de mesure d'embranchement, d'une unité ACS, d'un détecteur de valeurs à vraisemblance maximale, et d'une unité de normalisation en commun avec une méthode de répartition dans le temps pour réaliser un entrelaceur de codage en treillis utilisé dans une TV numérique. Le décodeur en treillis comprend autant de mémoires de chemin, de mémoires de mesure d'état et d'unités de recherche d'antécédents que l'entrelaceur de codage en treillis a besoin.

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