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dc.contributor.authorSo, Stephen
dc.contributor.authorPaliwal, Kuldip K
dc.date.accessioned2017-05-03T11:48:33Z
dc.date.available2017-05-03T11:48:33Z
dc.date.issued2011
dc.date.modified2011-08-09T06:27:32Z
dc.identifier.issn0167-6393
dc.identifier.doi10.1016/j.specom.2010.10.006
dc.identifier.urihttp://hdl.handle.net/10072/39786
dc.description.abstractIn this paper, we present a detailed analysis of the Kalman filter for the application of speech enhancement and identify its shortcomings when the linear predictor model parameters are estimated from speech that has been corrupted with additive noise. We show that when only noise-corrupted speech is available, the poor performance of the Kalman filter may be attributed to the presence of large values in the Kalman gain during low speech energy regions, which cause a large degree of residual noise to be present in the output. These large Kalman gain values result from poor estimates of the LPCs due to the presence of additive noise. This paper presents the analysis and application of the Kalman gain trajectory as a useful indicator of Kalman filter performance, which can be used to motivate further methods of improvement. As an example, we analyse the previously-reported application of long and overlapped tapered windows using Kalman gain trajectories to explain the reduction and smoothing of residual noise in the enhanced output. In addition, we investigate further extensions, such as Dolph-Chebychev windowing and iterative LPC estimation. This modified Kalman filter was found to have improved on the conventional and iterative versions of the Kalman filter in both objective and subjective testing.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeNetherlands
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom355
dc.relation.ispartofpageto378
dc.relation.ispartofissue3
dc.relation.ispartofjournalSpeech Communication
dc.relation.ispartofvolume53
dc.rights.retentionY
dc.subject.fieldofresearchSignal processing
dc.subject.fieldofresearchCognitive and computational psychology
dc.subject.fieldofresearchLinguistics
dc.subject.fieldofresearchCommunications engineering
dc.subject.fieldofresearchArtificial intelligence
dc.subject.fieldofresearchcode400607
dc.subject.fieldofresearchcode5204
dc.subject.fieldofresearchcode4704
dc.subject.fieldofresearchcode4006
dc.subject.fieldofresearchcode4602
dc.titleSuppressing the influence of additive noise on the Kalman gain for low residual noise speech enhancement
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Engineering
gro.date.issued2011
gro.hasfulltextNo Full Text
gro.griffith.authorPaliwal, Kuldip K.
gro.griffith.authorSo, Stephen


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