9th Annual Conference of the International Speech Communication Association

Brisbane, Australia
September 22-26, 2008

Noise Robust Speech Dereverberation Using Constrained Inverse Filter

Ken'ichi Furuya (1), Akitoshi Kataoka (2), Yoichi Haneda (1)

(1) NTT Corporation, Japan; (2) Ryukoku University, Japan

A noise robust dereverberation method is presented for speech enhancement in noisy reverberant conditions. This method introduces the constraint of minimizing the noise power in the inverse filter computation of dereverberation. It is shown that there exists a tradeoff between reducing the reverberation and reducing the noise; this tradeoff can be controlled by the constraint. Inverse filtering reduces early reflections and directional noise. In addition, spectral subtraction is used to suppress the tail of the inversefiltered reverberation and residual noise. The performance of our method is objectively and subjectively evaluated in experiments using measured room impulse responses. The results indicate that this method provides better speech quality than the conventional methods.

Full Paper

Bibliographic reference.  Furuya, Ken'ichi / Kataoka, Akitoshi / Haneda, Yoichi (2008): "Noise robust speech dereverberation using constrained inverse filter", In INTERSPEECH-2008, 427-430.