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| Paper Abstract and Keywords | ||
| Presentation | 2010-05-27 14:55 A sparse decomposition method for mixtures of periodic signals with varying envelopes Yuta Ishii, Makoto Nakashizuka, Youji Iiguni (Osaka Univ.)  EA2010-20 SIP2010-20 SP2010-20 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This study proposes a sparse decomposition method for mixtures of periodic signals with varying envelopes. Periodic decomposition methods have been proposed to decompose a signal into a sum of periodic signals. In order to reduce a redundancy of the decomposition result, a sparsity prior has been introduced in the sparse periodic decomposition. The sparse periodic decomposition has been applied to speech representation and separation. In existent periodic decompositions, the envelopes of the decomposed periodic signals are constant or piecewise-constant. However, the envelopes of acoustic signals usually varies along with time. In this paper, we introduce the periodic signal model with periodic signals with time-varying envelopes to improve the approximation accuracy of the source periodic signals in a mixture. The proposed method decomposes a mixture into a set of periodic signals, of which envelopes are represented by amplitude vectors. An additional penalty term of the envelope is added to a cost function, which are sum of the sparsity penalty and the approximation error. We also propose a decomposition algorithm that minimizes the cost function. In the experiments, decomposition results of mixtures of synthetic periodic signals are demonstrated. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | sparse decomposition method / periodic signal / envelope / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 110, no. 55, SIP2010-20, pp. 115-120, May 2010. | |
| Paper # | SIP2010-20 | |
| Date of Issue | 2010-05-19 (EA, SIP, SP) | |
| 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 | EA2010-20 SIP2010-20 SP2010-20 |
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| Conference Information | |
| Committee | SP EA SIP |
| Conference Date | 2010-05-26 - 2010-05-27 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Konan Univ. (Hirao Seminar House) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Speech, Engineering/Electro Acoustics, Signal Processing，and Related Topics |
| Paper Information | |
| Registration To | SIP |
| Conference Code | 2010-05-SP-EA-SIP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A sparse decomposition method for mixtures of periodic signals with varying envelopes |
| Sub Title (in English) | |
| Keyword(1) | sparse decomposition method |
| Keyword(2) | periodic signal |
| Keyword(3) | envelope |
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| 1st Author's Name | Yuta Ishii |
| 1st Author's Affiliation | Osaka University (Osaka Univ.) |
| 2nd Author's Name | Makoto Nakashizuka |
| 2nd Author's Affiliation | Osaka University (Osaka Univ.) |
| 3rd Author's Name | Youji Iiguni |
| 3rd Author's Affiliation | Osaka University (Osaka Univ.) |
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| Speaker | Author-1 |
| Date Time | 2010-05-27 14:55:00 |
| Presentation Time | 25 minutes |
| Registration for | SIP |
| Paper # | EA2010-20, SIP2010-20, SP2010-20 |
| Volume (vol) | vol.110 |
| Number (no) | no.54(EA), no.55(SIP), no.56(SP) |
| Page | pp.115-120 |
| #Pages | 6 |
| Date of Issue | 2010-05-19 (EA, SIP, SP) |
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