Enabling directional human-robot speech interface via adaptive beamforming and spatial noise reduction

Jounghoon Beh, Taekjin Lee, Sungjoo Ahn, Hyunsoo Kim, David K. Han, Hanseok Ko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper introduces a home robot application of multi-channel based spatial noise reduction for creating human-robot speech interfaces. A microphone array is employed first to create a speech-only directional conduit, which is realized through adaptive beamforming. Through the directional conduit, the intended speech signal from the desired direction is processed for detection and recognition, while unintended speech-like-sources or undesirable noise from other angles is suppressed. If speech signal is absent among the incoming signals through the conduit, further attenuation of undesirable signals is achieved by using a spatial noise reduction filter. Experimental validation of the technique was conducted using a computer simulation and also an online Samsung AnyBot test. Although the environments exhibited highly non-stationary noise, the method achieved an average speech recognition rate of 87.4% in the case of the computer simulation and 81.6% for the online Samsung AnyBot test. From the cases tested so far, the proposed implementation seems to be effective for practical robot applications in highly non-stationary noise environment.

Original languageEnglish
Title of host publicationIEEE International Conference on Intelligent Robots and Systems
Pages3454-3459
Number of pages6
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2007 - San Diego, CA, United States
Duration: 2007 Oct 292007 Nov 2

Other

Other2007 IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2007
CountryUnited States
CitySan Diego, CA
Period07/10/2907/11/2

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ASJC Scopus subject areas

  • Control and Systems Engineering

Cite this

Beh, J., Lee, T., Ahn, S., Kim, H., Han, D. K., & Ko, H. (2007). Enabling directional human-robot speech interface via adaptive beamforming and spatial noise reduction. In IEEE International Conference on Intelligent Robots and Systems (pp. 3454-3459). [4399420] https://doi.org/10.1109/IROS.2007.4399420