Speech Enhancement Algorithm Using Recursive Wavelet Shrinkage

Gihyoun LEE  Sung Dae NA  KiWoong SEONG  Jin-Ho CHO  Myoung Nam KIM  

IEICE TRANSACTIONS on Information and Systems   Vol.E99-D   No.7   pp.1945-1948
Publication Date: 2016/07/01
Publicized: 2016/03/30
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2015EDL8251
Type of Manuscript: LETTER
Category: Speech and Hearing
speech enhancement,  wavelet shrinkage,  recursive algorithm,  hearing aids,  

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Because wavelet transforms have the characteristic of decomposing signals that are similar to the human acoustic system, speech enhancement algorithms that are based on wavelet shrinkage are widely used. In this paper, we propose a new speech enhancement algorithm of hearing aids based on wavelet shrinkage. The algorithm has multi-band threshold value and a new wavelet shrinkage function for recursive noise reduction. We performed experiments using various types of authorized speech and noise signals, and our results show that the proposed algorithm achieves significantly better performances compared with other recently proposed speech enhancement algorithms using wavelet shrinkage.