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Exploring Non-linear Transformations for an Entropybased Voice Activity Detector

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dc.contributor Universitat de Vic. Escola Politècnica Superior
dc.contributor Universitat de Vic. Grup de Recerca en Tecnologies Digitals
dc.contributor International Conference on Non-Linear Speech Processing NOLISP (2009 : Vic)
dc.contributor NOLISP 2009
dc.contributor.author Solé-Casals, Jordi
dc.contributor.author Martí i Puig, Pere
dc.contributor.author Reig Bolaño, Ramon
dc.date.accessioned 2014-04-28T10:48:36Z
dc.date.available 2014-04-28T10:48:36Z
dc.date.created 2009
dc.date.issued 2009
dc.identifier.citation J. Solé-Casals, P. Martí-Puig, R. Reig-Bolaño, "Exploring Non-linear Transformations for an Entropy based Voice Activity Detector", Workshop on Non-linear Speech Processing - NOLISP, Vic (Spain), 2009. ca_ES
dc.identifier.isbn 9788493618681
dc.identifier.uri http://hdl.handle.net/10854/3003
dc.description.abstract In this paper we explore the use of non-linear transformations in order to improve the performance of an entropy based voice activity detector (VAD). The idea of using a non-linear transformation comes from some previous work done in speech linear prediction (LPC) field based in source separation techniques, where the score function was added into the classical equations in order to take into account the real distribution of the signal. We explore the possibility of estimating the entropy of frames after calculating its score function, instead of using original frames. We observe that if signal is clean, estimated entropy is essentially the same; but if signal is noisy transformed frames (with score function) are able to give different entropy if the frame is voiced against unvoiced ones. Experimental results show that this fact permits to detect voice activity under high noise, where simple entropy method fails. ca_ES
dc.format application/pdf
dc.format.extent 8 p. ca_ES
dc.language.iso eng ca_ES
dc.rights (c) Universitat de Vic
dc.rights Tots els drets reservats ca_ES
dc.subject.other Processament de la parla ca_ES
dc.title Exploring Non-linear Transformations for an Entropybased Voice Activity Detector ca_ES
dc.type info:eu-repo/semantics/bookPart ca_ES
dc.rights.accesRights info:eu-repo/semantics/openAccess ca_ES

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