Realization of Wide-Band Directivity with Three Microphones (Special Section on Advanced Signal Processing Techniques for Analysis of Acoustical and Vibrational Signals)
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概要
- 論文の詳細を見る
In order that the speech recognition system might have a high performance in the noisy environment, the directional microphone arrays at the input of the system have been broadly investigated. The purpose of this study is to develop a new wide-band directional microphone system in view of advancing to an adaptive one afterwards. In the proposed system, three microphones are arranged on a straight line and the beamforming is accomplished in such a way that the output value of the middle microphone is added to the integrated value of the difference between two microphones at both sides. In this study, the signal processing of microphone outputs is implemented by using active RC circuits. Finally, the objective directivity can be experimentally obtained in wide frequency ranges required for the speech recognition.
- 社団法人電子情報通信学会の論文
- 1999-04-25
著者
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NAKAMURA Masataka
Department of Emergency and Critical Care Medicine, Chiba University Graduate School of Medicine
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Nakamura Masataka
The Faculty Of Engineering Hiroshima Institute Of Technology
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Nakamura M
Univ. Ryukyus Okinawa‐ken Jpn
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YAMATO Toshitaka
Research and Development, Fujitsu TEN Ltd.
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KOUNO Katsuhito
the Faculty of Engineering, Hiroshima Institute of Technology
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KOUNO Katsuhito
Department of Electronics, Hiroshima Institute of Technology
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YAMATO Toshitaka
Fujitsu TEN Limited
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SAKIYAMA Kazuhiro
Fujitsu TEN Limited
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Nakamura Masataka
Department Of Chemical Science And Engineering Graduate School Of Engineering Kobe University
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Kouno Katsuhito
The Faculty Of Engineering Hiroshima Institute Of Technology
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Yamato Toshitaka
Research And Development Fujitsu Ten Ltd.
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