A Real-Time Speech Dereverberation Environment Based on Multichannel Parametric Room Equalization

Conference: Sprachkommunikation 2010 - 9. ITG-Fachtagung
10/06/2010 - 10/08/2010 at Bochum, Deutschland

Proceedings: Sprachkommunikation 2010

Pages: 4Language: englishTyp: PDF

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Schmid, Dominic; Thüne, Philipp; Enzner, Gerald (Institute of Communication Acoustics, Ruhr-Universität Bochum, 44780 Bochum, Germany)

The dereverberation of speech signals is of great importance for hands-free communication systems and automatic speech recognition. Despite a lot of research, the performance of current systems is still disappointing and reverberation remains a challenging and unsolved problem. In this paper, we explore performance limits by online identifying room impulse responses with a known reference signal and by equalizing their resonant and non-resonant characteristics in real-time with multichannel parametric algorithms. The proposed equalizer is highly flexible and particularly designed for the limited resources of a real-time implementation. After a description of our system and its complexity, we evaluate the dereverberation performance of our approach in terms of signal-to-noise ratios and spectrograms.