摘要
该文利用人耳感知的掩蔽特性,研究了一种改进的基于人耳听觉掩蔽特性的语音增强方法。该方法改进了对含噪语音中噪声的估计,即在估计噪声时,先在帧上判断语音的有无,然后在频率点上判断语音的有无,最后再从感知的角度,利用估计出的语音信号计算掩蔽阈值,以此在时域和频域上合理地调整增强系数。仿真结果表明,该方法不仅使信噪比有较大的提高,而且减少了语音失真,同时也很好地抑制了背景噪声和残余音乐噪声。
This paper suggests an improved speech enhancement method based on human auditory, masking properties. In this method, an improved noise estimation algorithm is used, then, the estimated results can be used to compute the masking threshold of the speech, after that, the coefficients of time and frequency are adjusted according to perception. The results show that the improved method leads to better signal to noise ratio, significant reduction of background noise, and unnatural structure of the residual noise.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2008年第2期255-257,304,共4页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金(60572011)
985特色项目(LZ985-231-58262)
关键词
听觉掩蔽
噪声估计
减谱算法
语音增强
auditory masking
noise estimate
spectral subtraction algorithm
speech enhancement
