Model-based dereverberation of speech in the mel-spectral domain

Conference contribution
(Conference Contribution)


Publication Details

Author(s): Sehr A, Kellermann W
Publication year: 2008
Pages range: 783-787
ISBN: 9781424429417
ISSN: 1058-6393
Language: English


Abstract


A model-based dereverberation approach for robust distant-talking speech recognition employing the powerful acoustic model of the recognizer to describe the clean speech feature sequence is discussed. The clean speech model is combined with a statistical reverberation model describing the acoustic path between speaker and microphone directly in the mel-spectral domain. Dereverberation is performed during recognition bydetermining the most likely contributions of the combined model's components to the current reverberant feature vector. The advantages of processing feature-domain representations of speech rather than using time- or frequency-domain speech representations are the dimension reduction and the possibility to obtain robust reverberation models valid for arbitrary speaker and microphone positions in the recording room. In this contribution, we emphasize that the criterion used for the dereverberation operation is equivalent to maximum a posteriori estimation. Connected-digit recognition experiments confirm the superior performance of the novel concept. © 2008 IEEE.


FAU Authors / FAU Editors

Kellermann, Walter Prof. Dr.-Ing.
Professur für Nachrichtentechnik
Sehr, Armin Dr.-Ing.
Professur für Nachrichtentechnik


How to cite

APA:
Sehr, A., & Kellermann, W. (2008). Model-based dereverberation of speech in the mel-spectral domain. In Proceedings of the 2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008 (pp. 783-787). Pacific Grove, CA, US.

MLA:
Sehr, Armin, and Walter Kellermann. "Model-based dereverberation of speech in the mel-spectral domain." Proceedings of the 2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008, Pacific Grove, CA 2008. 783-787.

BibTeX: 

Last updated on 2019-17-05 at 14:38