Speech Enhancement Using Robust Generalized Sidelobe Canceller with Multi-Channel Post-Filtering in Adverse Environments*

In this paper, we propose a speech enhancement algorithm which has the feature of interaction between adaptive beamforming and multi-channel post-filtering. A novel subband feedback controller based on speech presence probability is applied to Generalized Side-lobe Canceller algorithm to obtain a more robust adaptive beamforming in adverse environment and alleviate the problem of signal cancellation. A multi-channel post-filtering is used not only to further suppress diffuse noises and some transient noises, but also to give the speech presence probability information in each subband. Experimental results show that the proposed algorithm achieves considerable improvement on signal preservation of the desired speech in adverse noise environments over the comparative algorithms.