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Blind source separation in real time using Second Order statistics
Blekinge Institute of Technology, School of Engineering, Department of Signal Processing.
Blekinge Institute of Technology, School of Engineering, Department of Signal Processing.
2007 (English)Independent thesis Advanced level (degree of Master (One Year))Student thesisAlternative title
Blind source separation in real time using Second Order statistics (Swedish)
Abstract [en]

A multi stage approach to speech enhancement methods improves the quality of separation over standard techniques such as spectral subtraction and beamforming. Two algorithms are implemented for convolutive mixtures in two of the important stages of a speech enhancement system, the source separation stage and the background denoising stage. For source separation, a blind source separation method based on second order statistics has been adopted whereas for background denoising, a method based on minimum statistics of subband power, has been used. An efficient real time algorithm for convolutive blind source separation of broad band signals has been realized, by exploiting the second order statistics and non-stationarity of the signals. The real time system is capable of separating sources in a two microphone setup.

Abstract [sv]

A multi stage approach to speech enhancement methods improves the quality of separation over standard techniques such as spectral subtraction and beamforming. Two algorithms are implemented for convolutive mixtures in two of the important stages of a speech enhancement system, the source separation stage and the background denoising stage. For source separation, a blind source separation method based on second order statistics has been adopted whereas for background denoising, a method based on minimum statistics of subband power, has been used. An efficient real time algorithm for convolutive blind source separation of broad band signals has been realized, by exploiting the second order statistics and non-stationarity of the signals. The real time system is capable of separating sources in a two microphone setup.

Place, publisher, year, edition, pages
2007. , 58 p.
Keyword [en]
Blind source separation, convolutive mixtures, second order statistics, Adaptive decorrelation, Real time processing
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-3020Local ID: oai:bth.se:arkivex3BD1AC81FAADA172C12573A60051A3F2OAI: oai:DiVA.org:bth-3020DiVA: diva2:830315
Uppsok
Technology
Supervisors
Note
lakmal_silva@yahoo.com, melody_515@hotmail.comAvailable from: 2015-04-22 Created: 2007-12-03 Last updated: 2015-06-30Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
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  • sv-SE
  • Other locale
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Output format
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