Blind estimation of a feature-domain reverberation model in non-diffuse environments with variance adjustment

Conference contribution
(Conference Contribution)


Publication Details

Author(s): Wen JYC, Sehr A, Naylor PA, Kellermann W
Publication year: 2009
Pages range: 175-178
ISBN: 978-161-7388-76-7
Language: English


Abstract


Blind estimation of a two-slope feature-domain reverberation model is proposed. The reverberation model is suitable for robust distant-talking automatic speech recognition approaches which use a convolution in the feature domain to characterize the reverberant feature vector sequence, e.g. [1, 2, 3]. Since the model describes the reverberation by a matrix-valued IID Gaussian random process, its statistical properties are completely captured by its mean and variance matrices. The suggested solution for the estimation of the model includes two novel features based on the study of simulated rooms: 1) a solution for blindly determining a two-slope decay model from a single-slope estimate; 2) a variance mask to improve the estimation of the variance matrix. Using the proposed solution, the reverberation model can be estimated during recognition without the need of pre-training or using calibration utterances with known transcription. Connected digit recognition experiments using [3] show that the reverberation models estimated by the proposed approach significantly outperform HMM-based recognizers trained on reverberant data in most environments. © EURASIP, 2009.


FAU Authors / FAU Editors

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


External institutions
Imperial College London / The Imperial College of Science, Technology and Medicine


How to cite

APA:
Wen, J.Y.C., Sehr, A., Naylor, P.A., & Kellermann, W. (2009). Blind estimation of a feature-domain reverberation model in non-diffuse environments with variance adjustment. In Proceedings of the 17th European Signal Processing Conference, EUSIPCO 2009 (pp. 175-178). Glasgow, GB.

MLA:
Wen, Jimi Y C, et al. "Blind estimation of a feature-domain reverberation model in non-diffuse environments with variance adjustment." Proceedings of the 17th European Signal Processing Conference, EUSIPCO 2009, Glasgow 2009. 175-178.

BibTeX: 

Last updated on 2019-08-05 at 17:38