关键词: 语音增强, 几何谱减法, 最小均方误差, 板仓-斋藤距离

Abstract: In order to get a better performance in processing the speech which changes rapidly，an improved speech enhancement algorithm based on self-adaptive averaging factor method is proposed in this paper.Simulation with Itakura-Saito distance，speech wave picture，spectral picture Experimental results demonstrate that the proposed algorithm has better performance of speech articulation without any perceptional musicality，compared to another modified spectral subtraction algorithms under the same level of noise reduction，and this superiority is more significant at very low SNR.

Key words: speech enhancement, spectral subtraction of geometric approach, Minimum Mean Square Error（MMSE）, Itakura-Saito distance