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| Presentation | 2008-05-29 15:50 Acceleration of Higher-Order ICA Using Lerning Period Detection Based on Closed-Form Second-Order ICA and Kurtosis Yuuki Fujihara, Yu Takahashi, Shigeki Miyabe, Hiroshi Saruwatari, Kiyohiro Shikano (NAIST), Akira Tanaka (Hokkaido Univ)  EA2008-15 SIP2008-24 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A hands-free system with conventional independent component analysis (ICA) should update the separation filter constantly to follow the hourly environment change. In an actual environment, however, there exists a time period when the user is absent and only noises arise. If we continuously conduct the separation-filter updating in such a period via the same manner when target speech exists, ICA often yields an improper separation filter and performance degradation of the hands-free system. This study proposes a novel algorithm of kurtosis-based voice activity detection (VAD) for an appropriate ICA optimization. In the proposed algorithm, first, closed-form 2nd-order ICA (SO-ICA) is performed for providing the roughly-separated signals, and based on the kurtosis of the roughly-separated signal, VAD is processed. Next, when the current time period is voiced block, higher-order ICA's re-optimization is applied using the previously obtained SO-ICA's solution as the initial filter; this results in a fast and high convergence. In this paper, we reveal the effectiveness of the proposed method by performing a simulation experiment for blind spatial subtraction array with the proposed method under heavily noisy condition. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Independent component analysis / blind source separation / voice activity detection / closed-form solution / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 108, no. 68, EA2008-15, pp. 53-58, May 2008. | |
| Paper # | EA2008-15 | |
| Date of Issue | 2008-05-22 (EA, SIP) | |
| 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 | EA2008-15 SIP2008-24 |
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| Conference Information | |
| Committee | SIP EA |
| Conference Date | 2008-05-29 - 2008-05-30 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kansai Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | EA |
| Conference Code | 2008-05-SIP-EA |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Acceleration of Higher-Order ICA Using Lerning Period Detection Based on Closed-Form Second-Order ICA and Kurtosis |
| Sub Title (in English) | |
| Keyword(1) | Independent component analysis |
| Keyword(2) | blind source separation |
| Keyword(3) | voice activity detection |
| Keyword(4) | closed-form solution |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Yuuki Fujihara |
| 1st Author's Affiliation | Nara Institute of Science and Technology (NAIST) |
| 2nd Author's Name | Yu Takahashi |
| 2nd Author's Affiliation | Nara Institute of Science and Technology (NAIST) |
| 3rd Author's Name | Shigeki Miyabe |
| 3rd Author's Affiliation | Nara Institute of Science and Technology (NAIST) |
| 4th Author's Name | Hiroshi Saruwatari |
| 4th Author's Affiliation | Nara Institute of Science and Technology (NAIST) |
| 5th Author's Name | Kiyohiro Shikano |
| 5th Author's Affiliation | Nara Institute of Science and Technology (NAIST) |
| 6th Author's Name | Akira Tanaka |
| 6th Author's Affiliation | Graduate School of Information Science and Technology, Hokkaido University (Hokkaido Univ) |
| Speaker | Author-1 |
| Date Time | 2008-05-29 15:50:00 |
| Presentation Time | 25 minutes |
| Registration for | EA |
| Paper # | EA2008-15, SIP2008-24 |
| Volume (vol) | vol.108 |
| Number (no) | no.68(EA), no.70(SIP) |
| Page | pp.53-58 |
| #Pages | 6 |
| Date of Issue | 2008-05-22 (EA, SIP) |
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