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* Corresponding author 1 TEXMEX - Multimedia content-based indexing IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, Inria Rennes – Bretagne Atlantique 2 BUSIM Speech Group Department of Electrical and Electronic Engineering Istanbul

Abstract : This paper presents a method for indexing spoken utterances which combines lexical and phonetic hypotheses in a hybrid index built from automata. The retrieval is realised by a lexical-phonetic and semi-imperfect matching whose aim is to improve the recall. A feature vector, containing edit distance scores and a confidence measure, weights each transition to help the filtering of the candidate utterance list for a more precise search. Experiment results show that the lexical and phonetic representations are complementary and we compare the hybrid search with the state-of-the-art cascaded search to retrieve named entity queries.

Keywords : information retrieval speech indexing lexical-phonetic automata confidence measures edit distances supervised learning

Autor: Julien Fayolle - Murat Saraclar - Fabienne Moreau - Christian Raymond - Guillaume Gravier -

Fuente: https://hal.archives-ouvertes.fr/


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