An improved wavelet-based speech enhancement by using speech signal features

被引：22
|
作者：
Ayat, Saeed [1 ]
Manzuri-Shalmani, M. T. [1 ]
Dianat, Roohollah [1 ]
机构：
[1] Sharif Univ Technol, Dept Comp Engn, Tehran, Iran
来源：
COMPUTERS & ELECTRICAL ENGINEERING | 2006年 / 32卷 / 06期
关键词：
speech enhancement; WaveShrink; threshold selection; shrink function; thresholding algorithm;
D O I：
10.1016/j.compeleceng.2006.05.002
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper presents a new speech enhancement system that works in wavelet domain. The core of system is an improved WaveShrink module. First, different parameters of WaveShrink are studied; then, based on the features of speech signal, an improved wavelet-based speech enhancement system is proposed. The system uses a novel thresholding algorithm, and introduces a new method for threshold selection. Moreover, the efficiency of system has been increased by selecting more suitable parameters for voiced, unvoiced and silence regions, separately. The proposed system has been evaluated on different sentences under various noise conditions. The results show a plausible improvement in performance of system, in comparison with similar approaches. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：411 / 425
页数：15
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