TY - JOUR
T1 - Ears of the robot
T2 - Direction of arrival estimation based on pattern recognition using robot-mounted microphones
AU - Mochiki, Naoya
AU - Ogawa, Tetsuji
AU - Kobayashi, Tetsunori
PY - 2008/5
Y1 - 2008/5
N2 - We propose a new type of direction-of-arrival estimation method for robot audition that is free from strict head related transfer function estimation. The proposed method is based on statistical pattern recognition that employs a ratio of power spectrum amplitudes occurring for a microphone pair as a feature vector. It does not require any phase information explicitly, which is frequently used in conventional techniques, because the phase information is unreliable for the case in which strong reflections and diffractions occur around the microphones. The feature vectors we adopted can treat these influences naturally. The effectiveness of the proposed method was shown from direction-of-arrival estimation tests for 19 kinds of directions: 92.4% of errors were reduced compared with the conventional phase-based method.
AB - We propose a new type of direction-of-arrival estimation method for robot audition that is free from strict head related transfer function estimation. The proposed method is based on statistical pattern recognition that employs a ratio of power spectrum amplitudes occurring for a microphone pair as a feature vector. It does not require any phase information explicitly, which is frequently used in conventional techniques, because the phase information is unreliable for the case in which strong reflections and diffractions occur around the microphones. The feature vectors we adopted can treat these influences naturally. The effectiveness of the proposed method was shown from direction-of-arrival estimation tests for 19 kinds of directions: 92.4% of errors were reduced compared with the conventional phase-based method.
KW - Crosspower-spectrum phase
KW - Direction-of-arrival estimation
KW - Multiple signal classification
KW - Pattern recognition
KW - Robot audition
UR - http://www.scopus.com/inward/record.url?scp=68149125169&partnerID=8YFLogxK
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U2 - 10.1093/ietisy/e91-d.5.1522
DO - 10.1093/ietisy/e91-d.5.1522
M3 - Article
AN - SCOPUS:68149125169
SN - 0916-8532
VL - E91-D
SP - 1522
EP - 1530
JO - IEICE Transactions on Information and Systems
JF - IEICE Transactions on Information and Systems
IS - 5
ER -