基于MATLAB的谱相减语音增强算法的研究  

MATLAB-based Spectral Subtraction Algorithm for Speech Enhancement

作　　者：曹晓琳[1] 张素莉[1] 吴平[1] 丁铁夫[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《计算机仿真》2006年第3期278-280,283,共4页Computer Simulation

摘　　要：谱相减算法运算量小、便于快速处理、效果好,是一种重要的语音增强算法。针对谱相减法经典形式存在的“音乐噪声”残留问题,人们提出了各种改进形式。该文以这一类语音增强算法作为对象,对“音乐噪声”的消除方法进行了研究。介绍了谱相减法经典形式及多种改进形式的基本原理,并基于MATLAB,详细说明了算法具体的实现过程。结合实录语音样本,给出了不同形式谱相减法增强后的结果,对各种方法的效果进行了对比,总结了使用经验,并以此为基础提出了一种提高处理后带噪语音信噪比的改进方案。As an important algorithm for speech enhancement, spectral subtraction has less operation load and is convenient for operating efficiently and quickly. Kinds of modified algorithm are proposed to cancel ＂ music noise＂. The series of spectral subtraction are investigated in this paper. The theory of classical spectral subtraction algorithm and modified algorithms are introduced. The realization of these algorithms based on MATLAB is given in detail. By analyzing the enhanced waves, the effects of algorithms are compared and summarized. Based on these studies, a kind of modified algorithm is proposed to improve SNR.

关 键 词：谱相减 语音增强 音乐噪声 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]