An optimum microphone array post-filter for speech applications

Leukimmiatis, S; Dimitriadis, D; Maragos, P

dc.contributor.author	Leukimmiatis, S	en
dc.contributor.author	Dimitriadis, D	en
dc.contributor.author	Maragos, P	en
dc.date.accessioned	2014-03-01T02:43:56Z
dc.date.available	2014-03-01T02:43:56Z
dc.date.issued	2006	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31557
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-34548326297&partnerID=40&md5=872e3107de460e7a1866b3d46f5c74e0	en
dc.relation.uri	http://cvsp.cs.ntua.gr/publications/confr/LefkimmiatisDimitriadisMaragos_OptimumMicArrayPostFilter_icslp06.pdf	en
dc.relation.uri	http://cvsp.cs.ntua.gr/publications/confr/LeukimmiatisDimitriadisMaragos_OptimMicArrayPostFilter-SpeechApplic_ICSLP2006.pdf	en
dc.relation.uri	http://cvsp.cs.ntua.gr/projects/pub/HIWIRE/HiwirePublications/LeukimmiatisDimitriadisMaragos_OptimumMicArray_icslp06.pdf	en
dc.relation.uri	http://www.isca-speech.org/archive/interspeech_2006/i06_1389.html	en
dc.relation.uri	http://www.informatik.uni-trier.de/~ley/db/conf/interspeech/interspeech2006.html#LeukimmiatisDM06	en
dc.subject	Complex coherence	en
dc.subject	Microphone array	en
dc.subject	Post-filter	en
dc.subject	Speech enhancement	en
dc.subject	Speech recognition	en
dc.subject.other	Beam formers	en
dc.subject.other	General (CO)	en
dc.subject.other	input signals	en
dc.subject.other	international conferences	en
dc.subject.other	Microphone arrays	en
dc.subject.other	Multi channel (MC)	en
dc.subject.other	Multi-channel recordings	en
dc.subject.other	Noise fields	en
dc.subject.other	Noise power spectrum (NPS)	en
dc.subject.other	noise reductions	en
dc.subject.other	Post-filtering	en
dc.subject.other	Signal to Noise ratio (SNR)	en
dc.subject.other	Speech applications	en
dc.subject.other	Speech enhancement algorithms	en
dc.subject.other	Spoken language processing	en
dc.subject.other	Control theory	en
dc.subject.other	Estimation	en
dc.subject.other	Experiments	en
dc.subject.other	Filtration	en
dc.subject.other	Function evaluation	en
dc.subject.other	Linguistics	en
dc.subject.other	Microphones	en
dc.subject.other	Power spectrum	en
dc.subject.other	Signal to noise ratio	en
dc.subject.other	Speech	en
dc.subject.other	Speech processing	en
dc.subject.other	Sulfate minerals	en
dc.subject.other	Transfer functions	en
dc.subject.other	Wave filters	en
dc.subject.other	Speech enhancement	en
dc.title	An optimum microphone array post-filter for speech applications	en
heal.type	conferenceItem	en
heal.publicationDate	2006	en
heal.abstract	This paper proposes a post-filtering estimation scheme for multichannel noise reduction. The proposed method extends and improves the existing Zelinski's and, the most general and prominent, McCowan's post-filtering methods that use the auto- and crossspectral densities of the multichannel input signals to estimate the transfer function of the Wiener post-filter. A major drawback of these two speech enhancement algorithms is that the noise power spectrum at the beamformer's output is over-estimated and therefore the derived filters are sub-optimal in the Wiener sense. The proposed method deals with this problem and can be considered as an optimal post-filter that is appropriate for a wide variety of different noise fields. In experiments over real-noise multichannel recordings, the proposed technique is shown to obtain a significant headstart over the other methods in terms of signal-to-noise ratio and speech degradation measures. In addition it is used for ASR experiments where promising preliminary results are presented.	en
heal.journalName	INTERSPEECH 2006 and 9th International Conference on Spoken Language Processing, INTERSPEECH 2006 - ICSLP	en
dc.identifier.volume	5	en
dc.identifier.spage	2142	en
dc.identifier.epage	2145	en