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) |
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