Inlämning av Examensarbete / Submission of Thesis

Lakmal Silva; Zhu Bo , pp. 58. TEK/avd. för signalbehandling, 2007.

The work

Författare / Author: Lakmal Silva, Zhu Bo
nedelko.grbic@bth.se
Titel / Title: Blind source separation in real time using Second Order statistics
Översatt titel / Translated title: Blind source separation in real time using Second Order statistics
Abstrakt Abstract:

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.

Populärvetenskaplig beskrivning / Popular science summary: 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.
Ämnesord / Subject: Signalbehandling - Signal Processing

Nyckelord / Keywords: Blind source separation, convolutive mixtures, second order statistics, Adaptive decorrelation, Real time processing

Publication info

Dokument id / Document id:
Program:/ Programme Magisterprogram i Elektroteknik / Master of Science in Electrical Engineering
Registreringsdatum / Date of registration: 12/04/2007
Uppsatstyp / Type of thesis: D-Uppsats/Magister/Master

Context

Handledare / Supervisor: Dr. Nedelko Grbić
nedelko.grbic@bth.se
Examinator / Examiner: Dr. Nedelko Grbić
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: TEK/avd. för signalbehandling
S-372 25 Ronneby
+46 455 38 50 00
Anmärkningar / Comments:

lakmal_silva@yahoo.com, melody_515@hotmail.com

Files & Access

Bifogad uppsats fil(er) / Files attached: thesis_lak_bo.pdf (1398 kB, öppnas i nytt fönster)