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dc.contributor.authorLleida Solano, Eduardo
dc.contributor.authorMariño, José B.
dc.contributor.authorSalavedra Molí, Josep
dc.contributor.authorBonafonte Cávez, Antonio
dc.contributor.authorMonte Moreno, Enrique
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.identifier.citationLleida, E., Mariño, J., Salavedra, J., Bonafonte, A., Monte, E. Out-of-vocabulary word modelling and rejection for keyword spotting. A: European Conference on Speech Communication and Technology. "EUROSPEECH 1993: 3rd European Conference on Speech Communication and Technology: Berlin, Germany: September 22-25, 1993". Berlin: International Speech Communication Association (ISCA), 1993.
dc.description.abstractThis paper presents a combination of out-of-vocabulary (OOV) word modeling and rejection techniques in an attempt to accept utterances embedding a keyword and reject utterances with nonkeywords. The goal of this research is to develop a robust, task-independent Spanish keyword spotter and to develop a method for optimizing confidence thresholds for a particular context. To model OOV words, we employed both word and sub-word units as fillers, combined with n-gram language models. We also introduce a methodology for optimizing confidence thresholds to control the tradeoffs between acceptance, confirmation, and rejection of utterances. Our experiments are based on a Mexican Spanish auto-attendant system using the SpeechWorks recognizer release 6.5 Second Edition, in which we achieved a reduction in error of 8.9% as compared to the baseline system. Most of the error reduction is attributed to better keyword detection in utterances that contain both keywords and OOV words.
dc.format.extent1 p.
dc.publisherInternational Speech Communication Association (ISCA)
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació
dc.titleOut-of-vocabulary word modelling and rejection for keyword spotting
dc.typeConference report
dc.contributor.groupUniversitat Politècnica de Catalunya. VEU - Grup de Tractament de la Parla
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
local.citation.authorLleida, E.; Mariño, J.; Salavedra, J.; Bonafonte, A.; Monte, E.
local.citation.contributorEuropean Conference on Speech Communication and Technology
local.citation.publicationNameEUROSPEECH 1993: 3rd European Conference on Speech Communication and Technology: Berlin, Germany: September 22-25, 1993

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