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| Presentation | 2017-08-09 14:15 A study on reduction of reflective wave in sound source direction tracking system Kazuo Takayama, Jun Satonobu, Masataka Nakamura (Hiroshima Inst. of Tech.)  EA2017-30 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Abstract In a television conference system, a human assist robot, etc., it is required for the front of system to automatically follow the direction of the sound source by the rotation mechanism of the system including the microphone. The authors have proposed a sound source tracking system integrating sound source direction detection and rotation mechanism. The influence of reflected waves in real environments and its reduction are major issues. In this paper, first, we examined the tracking error due to the reflected wave in the omnidirectional microphone system. As a result, although the sound source direction tracking can be follow for all 360 ° azimuths, tracking error of ± several ten degrees may occur. In order to reduce follow-up error, this paper proposes a new application method of beam forming for reducing reflected waves in the sound source direction tracking system. In this method, when the received sound in the region in the vicinity of the front face of the system becomes maximum compared with other regions in the tracking result, it is judged that the direct wave arrives in this neighborhood. Then, we propose a method to adaptively realize beamforming in the front direction of the system at that timing. The hardware realization based on the concept is fabricated , include 4 microphones in 4cm×4cm horizontal plane to perfume the adaptive beam forming and following processing. Finally, the validity of proposed method is confirmed by the experimental results ;Tracking time from 180 degrees is 0.7 second and tracking error is within the range from -10°to +10°. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Sound source direction tracking / Rotation control / Robot / Videoconference system / Beam forming / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 170, EA2017-30, pp. 21-26, Aug. 2017. | |
| Paper # | EA2017-30 | |
| Date of Issue | 2017-08-02 (EA) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | EA2017-30 |
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| Conference Information | |
| Committee | EA ASJ-H |
| Conference Date | 2017-08-09 - 2017-08-10 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tohoku Univ., R. I. E. C. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Ultra-Realistic Acoustics, Engineering/Electro Acoustics, Psychological and Physiological Acoustics, and Related Topics |
| Paper Information | |
| Registration To | EA |
| Conference Code | 2017-08-EA-H |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study on reduction of reflective wave in sound source direction tracking system |
| Sub Title (in English) | |
| Keyword(1) | Sound source direction tracking |
| Keyword(2) | Rotation control |
| Keyword(3) | Robot |
| Keyword(4) | Videoconference system |
| Keyword(5) | Beam forming |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Kazuo Takayama |
| 1st Author's Affiliation | Hiroshima Institute of Technology (Hiroshima Inst. of Tech.) |
| 2nd Author's Name | Jun Satonobu |
| 2nd Author's Affiliation | Hiroshima Institute of Technology (Hiroshima Inst. of Tech.) |
| 3rd Author's Name | Masataka Nakamura |
| 3rd Author's Affiliation | Hiroshima Institute of Technology (Hiroshima Inst. of Tech.) |
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| Speaker | Author-1 |
| Date Time | 2017-08-09 14:15:00 |
| Presentation Time | 25 minutes |
| Registration for | EA |
| Paper # | EA2017-30 |
| Volume (vol) | vol.117 |
| Number (no) | no.170 |
| Page | pp.21-26 |
| #Pages | 6 |
| Date of Issue | 2017-08-02 (EA) |
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