Automatic speech recognition

G - Physics – 10 – L

Patent

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G10L 15/08 (2006.01)

Patent

CA 2247512

Speech recognition is carried out by matching parameterised speech with a dynamically extended network of paths comprising model linguistic elements (12b, 12c). The units are context related, e.g. triphones. Some elements cannot be converted to models at the time when it is necessary to incorporate the element into the paths because the context is not defined at the relevant time. In order to allow transfer the element is transferred as a place marker (21, 22, 23, 24) which is converted when a later extension completes the definition of the triphone. The place markers (12a) can be used to identify the locations for subsequent extensions.

La reconnaissance de la parole effectuée dans le cadre de l'invention consiste à associer des signaux de parole paramétrés avec un réseau à extension dynamique de trajets, composé d'éléments linguistiques servant de modèles (12b, 12c). Les unités, par exemple des ensembles de trois phonèmes, sont liées au contexte. Certains éléments ne peuvent être convertis en modèles au moment où il est nécesssaire de les incorporer dans les trajets, et ce parce que le contexte n'est pas défini à ce moment-là. Pour permettre le transfert, l'élément est transféré en tant que marqueur d'emplacement (21, 22, 23, 24) qui peut, lui, être converti au moment où une extension ultérieure vient compléter la définition de l'ensemble des trois phonèmes. Les marqueurs d'emplacement (12a) permettent d'identifier les emplacements servant à des extensions ultérieures.

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