NDLI: Robust speech enhancement using multi H/sub /spl infin// filters

Content Provider	IEEE Xplore Digital Library
Author	Ki Yong Lee Youn Jeong Lee Jae Yeol Rheem
Copyright Year	2004
Description	Author affiliation: Sch. of Electron. Eng., SoongSil Univ., Seoul, South Korea (Ki Yong Lee; Youn Jeong Lee)
Abstract	Since the speech enhancement algorithm based on a Kalman/Wiener filter requires a priori knowledge of the noise statistics and is focused on the minimization of the variance of the estimation error of the speech signal, a small estimation error on the noise may lead to a large estimation error. However, an H/sub /spl infin// filter does not require any assumptions and a priori knowledge on the noise statistics and it searches the best estimated signal that has the minimum error from all the estimated signals applying least upper bound, so it is more robust to a change of noise than the Kalman/Wiener filter. We propose a speech enhancement method based on multi H/sub /spl infin// filters. First, HMM parameters are estimated with the training data. Second, the speech signal is filtered with a fixed number of H/sub /spl infin// filters. Finally, the estimated clean speech is obtained from the sum of the weighted filtered outputs. Experimental results shows about 1-2 dB SNR improvement with increment of computation compared with the conventional Kalman filtering method.
Sponsorship	IEEE
Starting Page	169
Ending Page	172
File Size	741078
Page Count	4
File Format	PDF
ISBN	0780386396
DOI	10.1109/ISPACS.2004.1439038
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-18
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Speech enhancement Wiener filter Kalman filters Estimation error Noise robustness Error analysis Minimization methods Upper bound Hidden Markov models Parameter estimation
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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