Process of coding of prosody for conversation at low decibel...

G - Physics – 10 – L

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G10L 19/12 (2006.01) G10L 19/00 (2006.01)

Patent

CA 2359411

A speech encoding/decoding method using an encoder working at very low bit rates, comprises a learning step enabling the identification of the representatives of the speech signal; and an encoding step to segment the speech signal and determine the best representative associated with each recognized segment. The method also comprises at least one step for the encoding/decoding of at least one of the parameters of the prosody of the recognized segments, e.g., the energy, pitch, voicing, and/or length of the segments, by using a piece of information on prosody pertaining to the best representatives. The method can employ a bit rate of lower than 400 bits per second.

Procédé de codage-décodage de la parole utilisant un codeur à très bas débit comprenant une étape d'apprentissage permettant d'identifier des représentants du signal de parole et une étape de codage pour segmenter le signal de parole et déterminer le meilleur représentant associé à chaque segment reconnu. Le procédé comporte au moins une étape de codage-décodage d'un des paramètres au moins de la prosodie des segments reconnus, tel que l'énergie et/ou le pitch et/ou le voisement et/ou la longueur des segments, en utilisant une information de prosodie des meilleurs représentants . Application pour des débits inférieurs à 400 bits par seconde.

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