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

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    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.

    Original languageEnglish
    Title of host publicationEuropean Signal Processing Conference
    Publication statusPublished - 2008
    Event16th European Signal Processing Conference, EUSIPCO 2008 - Lausanne, Switzerland
    Duration: 2008 Aug 252008 Aug 29

    Other

    Other16th European Signal Processing Conference, EUSIPCO 2008
    CountrySwitzerland
    CityLausanne
    Period08/8/2508/8/29

    Fingerprint

    Telephone lines
    Microphones
    Noise abatement
    Speech recognition
    Mobile robots
    Robots
    Costs

    ASJC Scopus subject areas

    • Signal Processing
    • Electrical and Electronic Engineering

    Cite this

    Ears of the robot : Noise reduction using four-line ultra-micro omni-directional microphones mounted on a robot head. / Ogawa, Tetsuji; Takeuchi, Hirofumi; Takada, Shintaro; Akagiri, Kenzo; Kobayashi, Tetsunori.

    European Signal Processing Conference. 2008.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Ogawa, T, Takeuchi, H, Takada, S, Akagiri, K & Kobayashi, T 2008, Ears of the robot: Noise reduction using four-line ultra-micro omni-directional microphones mounted on a robot head. in European Signal Processing Conference. 16th European Signal Processing Conference, EUSIPCO 2008, Lausanne, Switzerland, 08/8/25.
    Ogawa, Tetsuji ; Takeuchi, Hirofumi ; Takada, Shintaro ; Akagiri, Kenzo ; Kobayashi, Tetsunori. / Ears of the robot : Noise reduction using four-line ultra-micro omni-directional microphones mounted on a robot head. European Signal Processing Conference. 2008.
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