NDLI: Robust speech recognition using beamforming with adaptive microphone gains and multichannel noise reduction

Content Provider	IEEE Xplore Digital Library
Author	Zhao, Shengkui Xiao, Xiong Zhang, Zhaofeng Nguyen, Thi Ngoc Tho Zhong, Xionghu Ren, Bo Wang, Longbiao Jones, Douglas L. Chng, Eng Siong Li, Haizhou
Copyright Year	2015
Description	Author affiliation: Department of Electrical Engineering, Nagaoka University of Technology, Japan (Zhang, Zhaofeng; Ren, Bo; Wang, Longbiao) \|\| Advanced Digital Sciences Center, Singapore (Zhao, Shengkui; Nguyen, Thi Ngoc Tho; Jones, Douglas L.) \|\| Temasek Labs, Nanyang Technological University, Singapore (Xiao, Xiong; Chng, Eng Siong; Li, Haizhou) \|\| School of Computer Engineering, Nanyang Technological University, Singapore (Zhong, Xionghu)
Abstract	This paper presents a robust speech recognition system using a microphone array for the 3rd CHiME Challenge. A minimum variance distortionless response (MVDR) beamformer with adaptive microphone gains is proposed for robust beamforming. Two microphone gain estimation methods are studied using the speech-dominant time-frequency bins. A multichannel noise reduction (MCNR) postprocessing is also proposed to further reduce the interference in the MVDR processed signal. Experimental results for the ChiME-3 challenge show that both the proposed MVDR beamformer with microphone gains and the MCNR postprocessing improve the speech recognition performance significantly. With the state-of-the-art deep neural network (DNN) based acoustic model, our system achieves a word error rate (WER) of 11.67% on the real test data of the evaluation set.
Starting Page	460
Ending Page	467
File Size	335473
Page Count	8
File Format	PDF
e-ISBN	9781479972913
DOI	10.1109/ASRU.2015.7404831
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-12-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Robustness Speech Estimation Array signal processing Microphone arrays Noise reduction CHiME 3 robust speech recognition MVDR beamforming microphone gain multichannel noise reduction
Content Type	Text
Resource Type	Article

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