Journal of Information Processing
Online ISSN : 1882-6652
ISSN-L : 1882-6652
Data-Intensive Sound Acquisition System with Large-scale Microphone Array
Hiroki NoguchiTomoya TakagiKoji KugataShintaro IzumiMasahiko YoshimotoHiroshi Kawaguchi
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2011 Volume 19 Pages 129-140

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Abstract

We propose a microphone array network that realizes ubiquitous sound acquisition. Several nodes with 16 microphones are connected to form a novel huge sound acquisition system, which carries out voice activity detection (VAD), sound source localization, and sound enhancement. The three operations are distributed among nodes. Using the distributed network, we produce a low-traffic data-intensive array network. To manage node power consumption, VAD is implemented. The system uses little power when speech is not active. For sound localization, a network-connected multiple signal classification (MUSIC) algorithm is used. The experimental result of the sound-source enhancement shows a signal-noise ratio (SNR) improvement of 7.75dB using 112 microphones. Network traffic is reduced by 99.11% when using 1,024 microphones.

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© 2011 by the Information Processing Society of Japan
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