Show simple item record

dc.contributor.authorDam, Hai
dc.contributor.authorNordholm, Sven
dc.contributor.authorDam, Hai Huyen Heidi
dc.contributor.authorLow, Siow Yong
dc.identifier.citationDam, H. and Nordholm, S. and Dam, H.H.H. and Low, S.Y. 2008. Postfiltering Using Multichannel Spectral Estimation in Multispeaker Environments. Eurasip Journal on Advances in Signal Processing. 2008: Article ID 860360.

This paper investigates the problem of enhancing a single desired speech source from a mixture of signals in multispeaker environments. A beamformer structure is proposed which combines a fixed beamformer with postfiltering. In the first stage, the fixed multiobjective optimal beamformer is designed to spatially extract the desired source by suppressing all other undesired sources. In the second stage, a multichannel power spectral estimator is proposed and incorporated in the postfilter, thus enabling further suppression capability. The combined scheme exploits both spatial and spectral characteristics of the signals. Two new multichannel spectral estimation methods are proposed for the postfiltering using, respectively, inner product and joint diagonalization. Evaluations using recordings from a real-room environment show that the proposed beamformer offers a good interference suppression level whilst maintaining a low-distortion level of the desired source.

dc.publisherHindawi Publishing Corporation
dc.titlePostfiltering Using Multichannel Spectral Estimation in Multispeaker Environments
dc.typeJournal Article
dcterms.source.titleEurasip Journal on Advances in Signal Processing

This article is published under the Open Access publishing model and distributed under the terms of the Creative Commons License Please refer to the licence to obtain terms for any further reuse or distribution of this work.

curtin.departmentWestern Australian Telecommunications Research Institute (Research Institute)
curtin.accessStatusOpen access

Files in this item


This item appears in the following Collection(s)

Show simple item record