Method and device for low-speed speech coding

G - Physics – 10 – L

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G10L 19/06 (2006.01) G10L 9/14 (1990.01)

Patent

CA 2079884

2079884 9117541 PCTABS00106 Le procédé consiste après avoir découpé le signal de parole en trames de longueur constante, à calculer (4...10) les caractéristiques de N filtres de modélisation du conduit vocal ainsi que les caractéristiques de période fondamentale (pitch), de voisement et d'énergie du signal vocal. Un codage en bloc est effectué pour les filtres d'une part, pour le pitch et le voisement d'autre part. L'énergie du signal de parole est déterminée un nombre P de fois par trame pour N trames, puis codée en un seul bloc. Applications: vocodeurs à bas débit 800 bits/s.

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