Dealing with Uncertainty in Microphone Placement in a Microphone Array Speech Recognition System
Himawan, Ivan, McCowan, Iain A., & Sridharan, Sridha (2008) Dealing with Uncertainty in Microphone Placement in a Microphone Array Speech Recognition System. In International Conference on Acoustics, Speech, and Signal Processing (ICASSP) 2008, March 31 2008 - April 4 2008, Las Vegas, Nevada, USA.
This paper investigates robustness to uncertain microphone placements in an array beamformer front-end to a speech recognition system. There are two general approaches to handling the placement uncertainty: using the approximately known geometry in a robust beamforming technique, or using techniques that require no prior knowledge of geometry. Experiments in this paper compare the robustness of different techniques for both of these approaches in terms of speech recognition accuracy. To benefit from existing microphone array speech recognition data corpora for experimentation, microphone placement uncertainty is simulated by introducing random perturbations in the assumed geometry. Experimental results show that robust beamforming yields stable performance to a certain degree of placement error, but thereafter techniques such as automatic calibration are beneficial.
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|Item Type:||Conference Paper|
|Subjects:||Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Signal Processing (090609)|
Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > INFORMATION SYSTEMS (080600) > Computer-Human Interaction (080602)
Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > ARTIFICIAL INTELLIGENCE AND IMAGE PROCESSING (080100) > Natural Language Processing (080107)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
Past > Institutes > Information Security Institute
|Copyright Owner:||Copyright 2008 IEEE|
|Copyright Statement:||Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.|
|Deposited On:||16 May 2008|
|Last Modified:||29 Feb 2012 23:48|
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