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Paper Abstract and Keywords
Presentation 2010-06-10 15:15
Decomposition of high order Ambisonic recordings for reproduction using irregular loudspeaker arrays
Jorge Trevino, Takuma Okamoto, Yukio Iwaya, Yo-iti Suzuki (Tohoku Univ.) EA2010-25
Abstract (in Japanese) (See Japanese page) 
(in English) Ambisonics is a technique for sound field synthesis and reproduction that has shown promising results for the presentation of three dimensional sound spaces. Sound fields are naturally represented by their expansion in terms of spherical harmonic functions; such descriptions are known as Ambisonic encodings. Precise regeneration of the sound field from a set of spherical harmonic expansion coefficients requires a sufficient number of loudspeakers arranged in a regular layout. Decoding of Ambisonic recordings for reproduction using a spherical, uniform loudspeaker array is straightforward. Nevertheless, evenly distributing a large number of loudspeakers is unfeasible in most scenarios. Irregular configurations are known to lead to ill-conditioned and singular decoding matrices. We propose a method to decompose high order Ambisonic recordings, based on the geometry of the target array, for accurate reproduction over irregular loudspeaker arrays.
Keyword (in Japanese) (See Japanese page) 
(in English) higher-order Ambisonics (HOA) / spherical harmonics expansion / 3D sound reproduction / spatial encoding of sound / Ambisonics / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 71, EA2010-25, pp. 19-24, June 2010.
Paper # EA2010-25 
Date of Issue 2010-06-03 (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 EA2010-25

Conference Information
Committee EA  
Conference Date 2010-06-10 - 2010-06-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Health Sci. Univ. of Hokkaido 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Engineering/Electro Acoustics, Musical Acoustics, Psychological and Physiological Acoustics, and Related Topics 
Paper Information
Registration To EA 
Conference Code 2010-06-EA 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Decomposition of high order Ambisonic recordings for reproduction using irregular loudspeaker arrays 
Sub Title (in English)  
Keyword(1) higher-order Ambisonics (HOA)  
Keyword(2) spherical harmonics expansion  
Keyword(3) 3D sound reproduction  
Keyword(4) spatial encoding of sound  
Keyword(5) Ambisonics  
Keyword(6)  
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1st Author's Name Jorge Trevino  
1st Author's Affiliation Research Institute of Electrical Communication/Graduate School of Information Sciences, Tohoku University (Tohoku Univ.)
2nd Author's Name Takuma Okamoto  
2nd Author's Affiliation Research Institute of Electrical Communication/Graduate School of Engineering, Tohoku University (Tohoku Univ.)
3rd Author's Name Yukio Iwaya  
3rd Author's Affiliation Research Institute of Electrical Communication/Graduate School of Information Sciences, Tohoku University (Tohoku Univ.)
4th Author's Name Yo-iti Suzuki  
4th Author's Affiliation Research Institute of Electrical Communication/Graduate School of Information Sciences, Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2010-06-10 15:15:00 
Presentation Time 30 minutes 
Registration for EA 
Paper # EA2010-25 
Volume (vol) vol.110 
Number (no) no.71 
Page pp.19-24 
#Pages 6 
Date of Issue 2010-06-03 (EA) 

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