Search algorithm for large vocabulary speech recognition

Details Search algorithm for large vocabulary speech recognition Search algorithm for large vocabulary speech recognition

G - Physics

10

L

G10L 15/08 (2006.01) G10L 15/00 (2006.01)

Patent

CA 2356640

Automatic speech recognition word sequence hypotheses are generated using an interleaved forward-backward search. A forward search pass uses relatively simple models for a given block period of time. A backward search pass then goes back over the previous block period using more complex models and the recognition hypotheses generated by the forward search pass. The backward search pass employs a word dependent n-best search having a flat model state organization.

L'invention concerne des hypothèses de séquences de mots de reconnaissance vocale automatique générées grâce à une recherche multiplexée avant-arrière. La recherche avant utilise des modèles relativement simples pour une période de temps donnée. La recherche arrière revient ensuite sur cette période de temps à l'aide de modèles plus complexes et d'hypothèses de reconnaissance générées par la recherche avant. La recherche arrière utilise une recherche dépendant d'un mot selon un choix optimal n présentant une organisation de l'état du modèle par un indicateur.

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