Undecimated Wavelet Packet for Blind Speech Separation Using Independent Component Analysis

  • Ibrahim Missaoui
  • Zied Lachiri
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 193)


This paper addresses the problem of multi-channel blind speech separation in the instantaneous mixture case. We propose a new blind speech separation system which combines independent component analysis approach and the undecimated wavelet packet decomposition. The idea behind employing undecimated wavelet as a preprocessing step is to improve the non-Gaussianity distribution of independent components which is a pre-requirement for ICA and to increase their independency. The two observed signals are transformed using undecimated wavelet and Shannon entropy criterion into an adequate representation and perform then a preliminary separation. Finally, the separation task is done in time domain. Obtained results show that the proposed method gives a considerable improvement when compared with FastICA and other techniques.


Undecimated wavelet packet decomposition independent component analysis blind speech separation 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Ibrahim Missaoui
    • 1
  • Zied Lachiri
    • 1
    • 2
  1. 1.National School of Engineers of TunisTunisTunisia
  2. 2.National Institute of Applied Science and Technology INSATTunisTunisia

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