Information and Media Technologies
Online ISSN : 1881-0896
ISSN-L : 1881-0896
Hardware and Devices
Data-Intensive Sound Acquisition System with Large-scale Microphone Array
Hiroki NoguchiTomoya TakagiKoji KugataShintaro IzumiMasahiko YoshimotoHiroshi Kawaguchi
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ジャーナル フリー

2011 年 6 巻 2 号 p. 307-318

詳細
抄録
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.
著者関連情報
© 2011 Information Processing Society of Japan
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