Robust parameters for noisy speech recognition

G - Physics – 10 – L

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G10L 15/20 (2006.01) G10L 15/16 (2006.01)

Patent

CA 2404441

The invention concerns a method for automatically processing noisy speech comprising the following steps: sensing and digitising speech (1); retrieving several frames (15) corresponding to said signal (10); breaking down each frame (15) using an analysing system (20, 40) into at least two different frequency bands to obtain two vectors of representative parameters (45); converting (50) the vectors (45) into second vectors relatively insensitive to noise (55), each converter system (50) being associated with a frequency band. The knowledge acquisition of said converter systems (50) being produced on a noise-contaminated speech corpus (102).

Méthode de traitement automatique de la parole perturbée par du bruit comprenant les étapes suivantes : - capture et numérisation de la parole (1) - extraction de plusieurs trames (15) correspondant audit signal (10) - décomposition de chaque trame (15) à l'aide d'un système d'analyse (20, 40) en au moins deux bandes de fréquences différentes pour obtenir deux vecteurs de paramètres représentatifs (45), - conversion (50) des vecteurs (45) en seconds vecteurs relativement insensibles au bruit (55), chaque systeme convertisseur (50) étant associé à une bande de fréquences. L'apprentissage desdits systèmes convertisseurs (50) étant réalisé sur corpus de parole contaminée par du bruit (102).

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