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

    2 Citations (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 publicationProceedings of the 2007 IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2007
    Pages3454-3459
    Number of pages6
    DOIs
    Publication statusPublished - 2007
    Event2007 IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2007 - San Diego, CA, United States
    Duration: 2007 Oct 292007 Nov 2

    Publication series

    NameIEEE International Conference on Intelligent Robots and Systems

    Other

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

    ASJC Scopus subject areas

    • Control and Systems Engineering
    • Software
    • Computer Vision and Pattern Recognition
    • Computer Science Applications

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