Combining superdirective beamforming and frequency-domain blind source separation for highly reverberant signals

Download
  1. (PDF, 1 MB)
  2. Get@NRC: Combining superdirective beamforming and frequency-domain blind source separation for highly reverberant signals (Opens in a new window)
AuthorSearch for: ; Search for: ; Search for:
TypeArticle
Journal titleEURASIP Journal on Audio, Speech, and Music Processing
Volume2010
Issue797962
Pages113; # of pages: 13
AbstractFrequency-domain blind source separation (BSS) performs poorly in high reverberation because the independence assumption collapses at each frequency bins when the number of bins increases. To improve the separation result, this paper proposes a method which combines two techniques by using beamforming as a preprocessor of blind source separation. With the sound source locations supposed to be known, the mixed signals are dereverberated and enhanced by beamforming; then the beamformed signals are further separated by blind source separation. To implement the proposed method, a superdirective fixed beamformer is designed for beamforming, and an interfrequency dependence-based permutation alignment scheme is presented for frequencydomain blind source separation. With beamforming shortening mixing filters and reducing noise before blind source separation, the combinedmethod works better in reverberation. The performance of the proposedmethod is investigated by separating up to 4 sources in different environments with reverberation time from 100 ms to 700 ms. Simulation results verify the outperformance of the proposed method over using beamforming or blind source separation alone. Analysis demonstrates that the proposed method is computationally efficient and appropriate for real-time processing.
Publication date
LanguageEnglish
AffiliationNRC Institute for Microstructural Sciences; National Research Council Canada
Peer reviewedNo
NPARC number17131344
Export citationExport as RIS
Report a correctionReport a correction
Record identifier9e0a484b-65be-4b07-8407-18db24a083c9
Record created2011-03-26
Record modified2016-12-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)