Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24286
Title: Beamspace blind signal separation for speech enhancement
Authors: Low, SY
Yiu, KFC 
Nordholm, S
Keywords: Beamspace
Blind signal separation
Microphone arrays
Speech enhancement
Issue Date: 2008
Publisher: Springer
Source: Optimization and engineering, 2008, p. 1-18 How to cite?
Journal: Optimization and engineering 
Abstract: Signal processing methods for speech enhancement are of vital interest for communications equipments. In particular, multichannel algorithms, which perform spatial filtering to separate signals that have overlapping frequency content but different spatial origins, are important for a wide range of applications. Two of the most popular multichannel methods are blind signal separation (BSS) and beamforming. Briefly, (BSS) separates mixed sources by optimizing the statistical independence among the outputs whilst beamforming optimizes the look direction of the desired source(s). However, both methods have separation limitations, in that BSS succumbs to reverberant environments and beamforming is very sensitive to array model mismatch. In this paper, we propose a novel hybrid scheme, called beamspace BSS, which is intended to compensate the aforementioned separation weaknesses by jointly optimizing the spatial selectivity and statistical independence of the sources. We show that beamspace BSS outperforms the separation performance of the conventional sensor space BSS significantly, particularly in reverberant room environments.
URI: http://hdl.handle.net/10397/24286
ISSN: 1389-4420
EISSN: 1573-2924
DOI: 10.1007/s11081-008-9060-4
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

1
Last Week
0
Last month
0
Citations as of Oct 12, 2017

Page view(s)

37
Last Week
2
Last month
Checked on Oct 16, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.