On the impact of signal preprocessing for robust distant speech recognition in adverse acoustic environments

Conference contribution


Publication Details

Author(s): Reindl K, Zheng Y, Meier S, Schwarz A, Kellermann W
Publishing place: Hong Kong, China
Publication year: 2012
Pages range: 131-135
ISBN: 978-1-4673-2193-8
Language: English


Abstract

In this contribution, a two-channel acoustic front-end for robust
automatic speech recognition (ASR) in adverse acoustic environments is
analyzed. The source signal extraction scheme combines a blocking matrix
based on semi-blind source separation, which provides a continuously
updated reference of all undesired components separated from the desired
signal and its reflections, and a single-channel Wiener postfilter. The
postfilter is directly derived from the obtained noise and interference
reference signal and hence, generalizes well-known postfilter
realizations. The proposed front-end and its integration into an ASR
system are analyzed and evaluated with respect to keyword accuracy under
reverberant conditions with unpredictable and nonstationary
interferences, and for different target source distances. Evaluating a
simplified front-end based on free-field assumptions, an ideal
front-end, where knowledge about the true undesired components is
assumed, and comparing the proposed scheme with the competitive approach
of solely using multistyle training, demonstrates the importance of an
adequate signal preprocessing for robust distant speech recognition.


FAU Authors / FAU Editors

Kellermann, Walter Prof. Dr.-Ing.
Professur für Nachrichtentechnik
Meier, Stefan
Professur für Nachrichtentechnik
Reindl, Klaus
Professur für Nachrichtentechnik
Schwarz, Andreas
Professur für Nachrichtentechnik
Zheng, Yuanhang
Lehrstuhl für Multimediakommunikation und Signalverarbeitung


How to cite

APA:
Reindl, K., Zheng, Y., Meier, S., Schwarz, A., & Kellermann, W. (2012). On the impact of signal preprocessing for robust distant speech recognition in adverse acoustic environments. (pp. 131-135). Hong Kong, CN: Hong Kong, China.

MLA:
Reindl, Klaus, et al. "On the impact of signal preprocessing for robust distant speech recognition in adverse acoustic environments." Proceedings of the IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), Hong Kong Hong Kong, China, 2012. 131-135.

BibTeX: 

Last updated on 2018-18-10 at 21:40