A method and apparatus for speech encoding, speech decoding,...

H - Electricity – 04 – B

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H04B 14/04 (2006.01) G10L 19/08 (2006.01) G10L 19/10 (2006.01) H03M 7/30 (2006.01)

Patent

CA 2283187

Input voices (5) are divided into spectrum envelope information and sound sources. The sound sources are encoded into a plurality of sound source positions and a plurality of sound source gains for each frame. The encoding characteristics of the encoding are improved. A provisional gain calculating unit (40) which calculates a provisional gain given to each sound source position candidate is provided in a sound source encoding unit (11) which encodes the sound sources into a plurality of the sound source positions and a plurality of the sound source gains. A pulse position searching unit (41) determines the sound source positions by using the provisional gains, and a gain encoding unit (12) encodes the sound source gains by using the determined sound source positions.

Des voix (5) en entrée sont divisées en informations d'enveloppe de spectre et en sources de son. Les sources de son sont codées en une pluralité de positions de sources de son et une pluralité de gains de source de son pour chaque trame. Les caractéristiques de codage sont améliorées. Une unité (40) de calcul provisionnel de gain calculant un gain provisionnel donné pour chaque candidat de position de source de son est prévu dans une unité (11) de codage de sources de son, laquelle code les sources de son en une pluralité de positions de sources de son et une pluralité de gains de sources de son. Une unité (41) de recherche de positions d'impulsions détermine les positions des sources de son au moyen des gains provisionnels, et une unité (12) de codage de gain code les gains des sources de son au moyen des positions de sources de son déterminées.

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