Speech decoding apparatus and speech decoding method

Details Speech decoding apparatus and speech decoding method Speech decoding apparatus and speech decoding method

G - Physics

10

L

G10L 19/04 (2006.01) G10L 11/02 (2006.01) G10L 19/00 (2006.01) G10L 19/12 (2006.01) H03M 7/30 (2006.01) G10L 11/04 (2006.01)

Patent

CA 2430319

First determiner 121 provisionally determines whether a current processing unit is a stationary noise region based on a determination result on stationary characteristics of a decoded signal. Based on the provisional determination result and a determination result on periodicity of the decoded signal, second determiner 124 further determines whether the current processing unit is a stationary noise region, whereby a decoded signal including a stationary speech signal such as a stationary vowel is distinguished from a stationary noise, and thus the stationary noise region is detected accurately.

Selon cette invention, un premier dispositif de détermination (121) détermine temporairement si une unité de traitement actuelle est une section de bruit stationnaire, sur la base du résultat d'une détermination stationnaire d'un signal de décodage. Un second dispositif de détermination (124) détermine si une unité de traitement actuelle est une section de bruit stationnaire sur la base dudit résultat de détermination temporaire et d'un résultat de détermination périodique du signal de décodage. Ainsi, la section de bruit stationnaire est détectée exactement par distinction d'un signal de décodage comprenant un signal audio stationnaire de voyelles stationnaires entre autres et d'un bruit stationnaire.

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