Method for the voice recognition of a speaker using a...

G - Physics – 10 – L

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G10L 17/00 (2006.01)

Patent

CA 2253276

The invention discloses a method for the voice recognition of a speaker using a q-order predictive model, comprising a step for extracting the statistical characteristics including a step of digital acquisition of the speaker's voice sample, corresponding to one or several utterances, a step of converting this voice sample into a sequence of vectors of size p, obtained from a series of analysis windows of average size T and an average spacing I, and a step of determining q+1 matrices from this vector sequence. The average size T is of a duration of less than 10 ms and the average spacing I of a duration of less than 4.5 ms. The invention is useful in a sound lock including an electroacoustical conversion system (HP, 6) and a recorded programme implementation system (5) for the method.

L'invention concerne un procédé de reconnaissance vocale d'un locuteur mettant en oeuvre un modèle prédictif d'ordre q, comprenant une phase d'extraction de caractéristiques statistiques comportant une étape d'acquisition numérique d'un échantillon sonore du locuteur, correspondant à une ou plusieurs élocutions, une étape de transformation de cet échantillon sonore en une suite de vecteurs de dimension p, obtenus à partir d'une suite de fenêtres d'analyse de taille moyenne T et d'intervalle moyen I, et une étape de détermination de q+1 matrices de corrélation à partir de cette suite de vecteurs. Selon l'invention, la taille moyenne T a une durée inférieure à 10 ms et l'intervalle moyen I une durée inférieure à 4,5 ms. Application notamment à une serrure vocale comprenant un système de conversion électroacoustique (HP, 6) et un système (5) de mise en oeuvre du procédé à programme enregistré.

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