NDLI: Temporal smearing compensation in reverberant environment for speech-based human-robot interaction

Content Provider	IEEE Xplore Digital Library
Author	Gomez, R. Nakamura, K. Mizumoto, T. Nakadai, K.
Copyright Year	2015
Description	Author affiliation: Honda Res. Inst. Japan Ltd. Co., Wako, Japan (Gomez, R.; Nakamura, K.; Mizumoto, T.; Nakadai, K.)
Abstract	Speech-based human-robot interaction is often plagued with issues such as reverberation and changes in speaker position that impacts overall performance. In this paper, we show a method in compensating the joint effects of reverberation and the change in speaker position. The acoustic perturbation caused by these two takes its toll on the Automatic Speech Recognition (ASR) and then the Spoken Language Understanding (SLU). Consequently, these will lead to a failure in the human-robot interaction experience. The proposed method is specifically designed to address the challenging environment condition in which robots are deployed. First, we analyze the impact of reverberation in the form of temporal smearing per change in speaker position. Then, we extract the smearing coefficients that capture the joint dynamics between the speech signal at current position and the room acoustics as observed by the robot. These coefficients are utilized to update the room transfer function (RTF) and the suppression parameters are stored offline. Moreover, all of these processes are optimized in the context of the ASR system for robot application. In the online mode, the reverberant data at an arbitrary position is processed using the parameters pre-computed offline. This effectively compensates the joint effects of reverberation at the arbitrary speaker position. Experimental results using real data gathered in a human-robot communication setting show that the proposed method outperforms existing methods.
Starting Page	3347
Ending Page	3353
File Size	1374435
Page Count	7
File Format	PDF
e-ISBN	9781479969234
DOI	10.1109/ICRA.2015.7139661
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Hidden Markov models Robots Reverberation Speech Joints Databases Automatic Speech Recognition Speech Enhancement Dereverberation Robustness
Content Type	Text
Resource Type	Article

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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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