Hands-free speech recognition using a reverberation model in the feature domain

Conference contribution
(Conference Contribution)


Publication Details

Author(s): Sehr A, Zeller M, Kellermann W
Publisher: IEEE
Publication year: 2006
ISSN: 22195491
Language: English


Abstract


A novel approach for robust hands-free speech recognition in highly reverberant environments is proposed. Unlike conventional HMMbased concepts, it implicitly accounts for the statistical dependence of successive feature vectors due to the reverberation. This property is attained by a combined acoustic model consisting of a conventional HMM, modeling the clean speech, and a reverberation model. Since the HMM is independent of the acoustic environment, it needs to be trained only once using the usual Baum-Welch reestimation procedure. The training of the reverberation model is based on a set of room impulse responses for the corresponding acoustic environment and involves only a negligible computational effort. Thus, the recognizer can be adapted to new environments with moderate effort. In a simulation of an isolated digit recognition task in a highly reverberant room, the proposed method achieves a 60% reduction of the word error rate compared to a conventional HMM trained on reverberant speech, at the cost of an increased decoding complexity.


FAU Authors / FAU Editors

Kellermann, Walter Prof. Dr.-Ing.
Professur für Nachrichtentechnik
Sehr, Armin Dr.-Ing.
Professur für Nachrichtentechnik
Zeller, Marcus
Lehrstuhl für Multimediakommunikation und Signalverarbeitung


How to cite

APA:
Sehr, A., Zeller, M., & Kellermann, W. (2006). Hands-free speech recognition using a reverberation model in the feature domain. In Proceedings of the 14th European Signal Processing Conference, EUSIPCO 2006. Florence, IT: IEEE.

MLA:
Sehr, Armin, Marcus Zeller, and Walter Kellermann. "Hands-free speech recognition using a reverberation model in the feature domain." Proceedings of the 14th European Signal Processing Conference, EUSIPCO 2006, Florence IEEE, 2006.

BibTeX: 

Last updated on 2019-29-05 at 19:53