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EP0454552A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method and apparatus for low bitrate speech coding

Assignee: Thales SA
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Filing: 1991-04-19
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Granted: —
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Expires: 2011-04-19
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Abstract

Abstract Translated from French 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. The method consists after having cut the speech signal into frames of constant length, to calculate (4 ... 10) the characteristics of N modeling filters of the vocal tract as well as the characteristics of fundamental period (pitch), voicing and d voice signal energy. Block coding is performed for the filters on the one hand, for the pitch and the voicing on the other. L'énergie du signal de parole est déterminé un nombre l de fois par trame pour N trames, puis codé en un seul bloc. The energy of the speech signal is determined a number l of times per frame for N frames, then coded in a single block. Applications : vocodeurs à bas débit 800 bits/s. Applications: 800 bit / s low speed vocoders.

Inventors

  • 👤 Benoit Mouy
  • 👤 Pierre Laurent

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-26 00:13
CPC Classifications
G; G10; G10L; G10L19/00; G10L19/04; G10L19/06; G10L19/07

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