Speech coding with comfort noise variability feature for...

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G - Physics

10

L

G10L 19/14 (2006.01) G10L 19/00 (2006.01) H04M 1/253 (2006.01)

Patent

CA 2349944

The quality of comfort noise generated by a speech decoder (93) during non- speech periods is improved by modifying (30,75) comfort noise parameter values (33) normally used to generate the comfort noise. The comfort noise parameter values are modified in response to variability information (43) associated with a background noise parameter. The modified comfort noise parameter values (35) are then used to generate the comfort noise.

La qualité du bruit de confort généré par un décodeur de parole (93) pendant les périodes où l'on ne parle pas est améliorée par la modification (30,75) des valeurs (33) du paramètre du bruit de confortabituellement utilisées pour générer le bruit de confort. Ces valeurs sont modifiées en réponse à des informations de variabilité (43) associées à un paramètre de bruit de fond. Les valeurs du paramètre du bruit de confort modifiées (35) sont alors utilisées pour générer le bruit de confort.

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