摘要
】本文对采用减谱法和相关法的语音增强系统进行了研究，系统的噪声为白噪声和普通机房噪声。减谱法采用单麦克风输入，试验中发现语音的分帧方法对消噪影响很大，通过比较得到了一种具有明显消噪效果的分帧方法，在相关法中采用双麦克风输入，对两个输入信号之间的时延差进行了补偿，在求维纳滤波器系数时，对信号谱进行统计平均，从而使消噪后的语音信号具有较好的自然度。在研究以上两种方法的基础上，我们提出了一种混合消噪系统，该系统较前两种方法具有更明显的消噪功能。
In this paper,we have studied several speech enhancement systems that use spectrum subtraction method and Allen’s reverberate noise suppression technique.In the first part of this paper,we discuss the effect of various windows,and have chosen the best one for this noise suppression system.In the second part of this paper,Wiener filter is utilized and two channel input signals are adopted.During the procedure of preprocessing,the time delay between two channel signals should be estimated and compensated accurately,then we use statistical method to increase the naturalness of the restored speech.In the last part of this paper,a new mixed speech enhancement system has been proposed which has better noise suppression performance than the two algorithms mentioned before.
出处
《电讯技术》
北大核心
1996年第6期32-40,共9页
Telecommunication Engineering
