France Telecom, Orange Labs
Session JEP poster P1 Lundi 9 Juin - 16h00 18h00
Construction et exploitation des réseaux de confusion dans le contexte d'une application de dialogue en langage naturel
- Bogdan Minescu ( France Telecom, Orange Labs)
- Géraldine Damnati ( France Telecom, Orange Labs)
- Résumé : In the context of Spoken Language Understanding (SLU), post-processing rich Automatic Speech Recognition outputs such as word lattices rather than processing a single one-best solution has proven to be an efficient way of improving applicative performances but also to propagate uncertainty towards further applicative modules in order to delay the final decision. Confusion Networks consist in summarizing the information available in a word lattice into the form of a sequence of classes of local alternative hypotheses, while providing reliable confidence measures on these hypotheses. This study presents a strategy whose goal is to reject non-relevant messages as early as possible and to compute Confusion Networks only for relevant messages. On the basis of this strategy, an improved, SLU oriented, CN generation algorithm is also proposed that significantly reduces the size of the obtained CN while improving the recognition performances.