Blind multichannel identification for speech dereverberation and enhancement

A multichannel wideband signal dereverberation and enhancement method is proposed in this paper. It uses the blindly estimated impulse responses (IR) relating the signal source and each sensor to form a multiple input inverse filter (MINT) for speech dereverberation and enhancement with extended generalized sidelobe canceller (GSC). With the replacement of MINT for fixed beamformer and modification of blocking matrix in the conventional GSC, the resulting extended GSC not only dereverberates the distorted target signal, but also suppresses the interference/noise. Computer simulation results show the effectiveness of the proposed method.