摘要
针对非平稳噪声环境和低信噪比的情况,提出了一种基于低频区语音特性的非平稳噪声估计方法,通过构造一个时变的权值,实现对噪声的实时估计,同时结合人耳听觉掩蔽效应,利用估计出的噪声自适应设定增强系数。仿真实验表明,该方法能够较好地抑制背景噪声,提高信噪比,减少语音失真。
Aiming at non-stationary noise environment and low SNR,a non-stationary noise estimation method is proposed by using low-frequency regions of noisy speech,a weighting factor is used to track the time variation of noise.Then,the estimated noise can be used to self-adaptively adjust enhancement parameters according to auditory masking properties.The experiment result shows that the method is effective to reduce background noise,improve SNR and decrease speech distortion.
出处
《计算机工程与应用》
CSCD
北大核心
2011年第7期146-148,共3页
Computer Engineering and Applications
基金
航空科学基金No.20080153002~~
关键词
非平稳噪声估计
听觉掩蔽
语音增强
信噪比
non-stationary noise estimation
auditory masking
speech enhancement
signal to noise ratio