Ears of the robot: Noise reduction using four-line ultra-micro omni-directional microphones mounted on a robot head

Tetsuji Ogawa*, Hirofumi Takeuchi, Shintaro Takada, Kenzo Akagiri, Tetsunori Kobayashi

*この研究の対応する著者

研究成果査読

1 被引用数 (Scopus)

抄録

We propose a new type of noise reduction method suitable for autonomous mobile robots that require small and light-weighted devices and low-computational-cost algorithms. In the proposed method, four-line omni-directional micro electro mechanical system (MEMS) microphones are mounted on the robot head. The proposed method can reduce various kinds of noises simultaneously: directional noises are reduced by time-frequency masking using null beamformers and subtractive beamformers, and diffuse noises are reduced by multi-channel Wiener filtering using coherences. The effectiveness of the proposed method was shown in terms of speech recognition accuracies and speech qualities: the word error rate was reduced by 45% and 0.16 points of PESQ-MOS were improved compared with conventional time-frequency masking. copyright by EURASIP.

本文言語English
ジャーナルEuropean Signal Processing Conference
出版ステータスPublished - 2008 12 1
イベント16th European Signal Processing Conference, EUSIPCO 2008 - Lausanne, Switzerland
継続期間: 2008 8 252008 8 29

ASJC Scopus subject areas

  • 信号処理
  • 電子工学および電気工学

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