Departmental Papers (ESE)

Document Type

Conference Paper

Date of this Version

June 2004

Comments

Copyright 2004 IEEE. Reprinted from Proceedings of the 2004 IEEE International Conference on Multimedia and Expo (ICME 2004), pages 1971-1974.
Publisher URL: http://ieeexplore.ieee.org/xpl/tocresult.jsp?isNumber=30346&page=8

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Abstract

The Iterative Wiener Filter (IWF) for speech enhancement in additive noise is an effective and simple algorithm to implement. One of its main disadvantages is the lack of proper criteria for convergence, which has been shown to introduce severe degradation to the estimated clean signal. Here, an improvement of the IWF algorithm is proposed, when additional information is available for the signal to be enhanced. If a small amount of clean speech data is available, spectral conversion techniques can be applied for esimating the clean short-term spectral envelope of the speech signal from the noisy signal, with significant noise reduction. Our results show an average improvement compared to the original IWF that can reach 2 dB in the segmental output Signal-to-Noise Ratio (SNR), in low input SNR's, which is perceptually significant.

Keywords

iterative wiener filter, spectral conversion, speech enhancement, speech conversion

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Date Posted: 04 March 2005