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| Presentation | 2014-03-08 11:00 On Inaudibility of Cochlear-Delay-based Watermarking Method with Blind Detection Nhut M. Ngo, Masashi Unoki (JAIST)  EMM2013-114 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper reports an investigation on inaudibility of watermarking method based on cochlear delay. The proposed watermarking method employed phase-shift-keying (PSK) technique to embed a watermark into an audio signal. Discontinuity in watermarked signal due to the phase difference between two successive frames makes the sound quality of watermarked signals drastically degraded. We applied a second-order allpass filter to control the phase of the original signal so that the phase difference could become unnoticeable to improve the inaudibility of watermarking method. The experimental results suggested that the sound quality of watermarked signal could be improved by using the second-order allpass filter in the proposed method. We also investigated effect of PSK technique used in cochlear-delay-based watermarking method on sound quality of watermarked signals in different frequency ranges. PSK technique was used to modify the phase of different sub-band signals which are decomposed from the original signal. We evaluated sound quality of watermarked signals in which one sub-band is embedded with a watermark while the other sub-bands are kept unchanged. The experimental results showed that the low frequency region of sound is much affected by PSK technique while the higher frequency region of sound is less affected. The results suggested that the high frequency region of original signals should be chosen for embedding watermark to reduce sound distortion of watermarked signals caused by the PSK. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | digital-audio watermarking / cochlear delay / blindness / inaudibility / PSK / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 113, no. 480, EMM2013-114, pp. 87-92, March 2014. | |
| Paper # | EMM2013-114 | |
| Date of Issue | 2014-02-28 (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 | EMM2013-114 |
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| Conference Information | |
| Committee | EMM |
| Conference Date | 2014-03-07 - 2014-03-08 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | JAIST |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Poster Session, etc. |
| Paper Information | |
| Registration To | EMM |
| Conference Code | 2014-03-EMM |
| Language | English |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | On Inaudibility of Cochlear-Delay-based Watermarking Method with Blind Detection |
| Sub Title (in English) | |
| Keyword(1) | digital-audio watermarking |
| Keyword(2) | cochlear delay |
| Keyword(3) | blindness |
| Keyword(4) | inaudibility |
| Keyword(5) | PSK |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Nhut M. Ngo |
| 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 | 2014-03-08 11:00:00 |
| Presentation Time | 30 minutes |
| Registration for | EMM |
| Paper # | EMM2013-114 |
| Volume (vol) | vol.113 |
| Number (no) | no.480 |
| Page | pp.87-92 |
| #Pages | 6 |
| Date of Issue | 2014-02-28 (EMM) |
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