TY - JOUR
T1 - Ears of the robot
T2 - 16th European Signal Processing Conference, EUSIPCO 2008
AU - Ogawa, Tetsuji
AU - Takeuchi, Hirofumi
AU - Takada, Shintaro
AU - Akagiri, Kenzo
AU - Kobayashi, Tetsunori
PY - 2008/12/1
Y1 - 2008/12/1
N2 - 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.
AB - 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.
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M3 - Conference article
AN - SCOPUS:84863734970
JO - European Signal Processing Conference
JF - European Signal Processing Conference
SN - 2219-5491
Y2 - 25 August 2008 through 29 August 2008
ER -