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| Paper Abstract and Keywords | ||
| Presentation | 2016-03-03 13:00 Methods for Concavity Detection in Singular Spectrum Jessada Karnjana, Masashi Unoki (JAIST)  EMM2015-94 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Recently, we propose an audio watermarking scheme based on singular-spectrum analysis (SSA), and also propose an improved version by incorporating differential evolution into the previously proposed scheme. The basic idea is that, SSA is used to deliver a singular spectrum of given audio frame, and then a watermark bit is embedded into the frame by modifying some singular values. Naturally, any part of singular-spectrum curve is decreased and convex. However, according to our proposed modification rule, when a watermark bit “1” is embedded, it causes some part of singular spectrum concave. In the previous work, we take it for granted that the extraction process knows in advance where the concave part is located. Unfortunately, such a location is stimulus-dependent. Therefore, the assumption is not practicable for some real-world applications. To solve the problem, this work proposes two methods for concavity detection in singular spectrum in order to estimate the location automatically. In the first method, concavity is determined by analyzing the second order derivative of singular spectrum. For the second method, a concavity density function is defined and used to find the concave part of singular spectrum. The test results show that, even though the derivative-based method can be used for concavity detection, but it has limitations, especially when the concave part is located on a tail of singular spectrum. The second proposed method outperforms the first one. The correct identification of concave part is quite high with the narrow margin of error. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Singular-spectrum analysis / singular value / concavity density function / blind audio-watermarking / automatic parameter estimation / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 115, no. 479, EMM2015-94, pp. 105-110, March 2016. | |
| Paper # | EMM2015-94 | |
| Date of Issue | 2016-02-24 (EMM) | |
| 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 | EMM2015-94 |
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| Conference Information | |
| Committee | EMM |
| Conference Date | 2016-03-02 - 2016-03-03 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Yakushima Environ. and Cultural Vill. Center |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Image and Sound Quality, Metrics for Perception and Recognition, Human Auditory and Visual System, etc. |
| Paper Information | |
| Registration To | EMM |
| Conference Code | 2016-03-EMM |
| Language | English |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Methods for Concavity Detection in Singular Spectrum |
| Sub Title (in English) | |
| Keyword(1) | Singular-spectrum analysis |
| Keyword(2) | singular value |
| Keyword(3) | concavity density function |
| Keyword(4) | blind audio-watermarking |
| Keyword(5) | automatic parameter estimation |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Jessada Karnjana |
| 1st Author's Affiliation | Japan Advanced Institute of Science and Technology (JAIST) |
| 2nd Author's Name | Masashi Unoki |
| 2nd Author's Affiliation | Japan Advanced Institute of Science and Technology (JAIST) |
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| Speaker | Author-1 |
| Date Time | 2016-03-03 13:00:00 |
| Presentation Time | 25 minutes |
| Registration for | EMM |
| Paper # | EMM2015-94 |
| Volume (vol) | vol.115 |
| Number (no) | no.479 |
| Page | pp.105-110 |
| #Pages | 6 |
| Date of Issue | 2016-02-24 (EMM) |
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