关键词: 语音增强, 子空间, 维纳滤波, 音乐噪声

Abstract: In view of the musical noise after the enhancement of speech corrupted by complicated additive noise，a speech enhancement method based on the combination of subspace and Winner filter is proposed.This method has following steps.By KL transformation the noisy speech is transformed into subspace domain，and the noisy speech eigenvalue is estimated.A Winner filter is formed by using the Signal-Noise-Ratio（SNR） formula in subspace domain.The estimated eigenvalue is filtered by the Winner filter.Thereby the new clean speech eigenvalue is gained.The clean speech is gained by KL reverse transformation.Simulation results show that under the background of white and train noise，the SNR in this method is more excellent than that in traditional subspace method.Meanwhile the musical noise after the enhancement is depressed effectively.

Key words: speech enhancement, subspace, Winner filter, musical noise