University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Penalty function-based joint diagonalization approach for convolutive blind separation of nonstationary sources

Wang, W, Sanei, S and Chambers, JA (2005) Penalty function-based joint diagonalization approach for convolutive blind separation of nonstationary sources IEEE Transactions on Signal Processing, 53 (5). pp. 1654-1669.

[img] Text
WangSC_TSP_2005.pdf
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (1MB)
[img] Text (licence)
SRI_deposit_agreement.pdf
Restricted to Repository staff only

Download (33kB)

Abstract

A new approach for convolutive blind source separation (BSS) by explicitly exploiting the second-order nonstationarity of signals and operating in the frequency domain is proposed. The algorithm accommodates a penalty function within the cross-power spectrum-based cost function and thereby converts the separation problem into a joint diagonalization problem with unconstrained optimization. This leads to a new member of the family of joint diagonalization criteria and a modification of the search direction of the gradient-based descent algorithm. Using this approach, not only can the degenerate solution induced by a null unmixing matrix and the effect of large errors within the elements of covariance matrices at low-frequency bins be automatically removed, but in addition, a unifying view to joint diagonalization with unitary or nonunitary constraint is provided. Numerical experiments are presented to verify the performance of the new method, which show that a suitable penalty function may lead the algorithm to a faster convergence and a better performance for the separation of convolved speech signals, in particular, in terms of shape preservation and amplitude ambiguity reduction, as compared with the conventional second-order based algorithms for convolutive mixtures that exploit signal nonstationarity. © 2005 IEEE.

Item Type: Article
Authors :
NameEmailORCID
Wang, WUNSPECIFIEDUNSPECIFIED
Sanei, SUNSPECIFIEDUNSPECIFIED
Chambers, JAUNSPECIFIEDUNSPECIFIED
Date : May 2005
Identification Number : 10.1109/TSP.2005.845433
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 14:43
Last Modified : 31 Oct 2017 14:37
URI: http://epubs.surrey.ac.uk/id/eprint/596092

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800