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| Presentation | 2013-11-15 09:45 Study on Semi-Scramble Method for Speech Signals Based on Phonemic Restoration Katsuhiko Yamamoto, Zhi Zhu, Masashi Unoki (JAIST), Naofumi Aoki (Hokkaido Univ.)  EA2013-78 EMM2013-78 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Speech scramble method can encrypt the digital audio signal for guaranteeing the confidentiality of speech content. This is a very important technique for preventing eavesdropping and unauthorized copying. There are typical methods such as scramble methods based on speech codecs and reverse scrambling in the frequency domain. However, there seems to be impossible for completely recovering the scrambled speech signal into the original signal. Moreover, nobody can hear out the partial speech content from speech signals scrambled by these methods. This paper proposes a speech scramble method based on random-bit shift of quantization bits using the public key. This paper, then, proposes a semi-scramble method for speech signals based on phonemic restoration, by making flexible use of the proposed method. We evaluated confidentiality and efficiency of the proposed methods by carrying out two objective tests (SER and PESQ). As the results, we confirmed that the speech signals can be fully restored from the scrambled speech by the proposed methods. In addition, we also confirmed that the semi-scrambled speech can be perceived as the original one. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | scramble method / semi-scramble method / phonemic restoration / quantization-bit shifting / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 113, no. 291, EMM2013-78, pp. 59-64, Nov. 2013. | |
| Paper # | EMM2013-78 | |
| Date of Issue | 2013-11-07 (EA, 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 | EA2013-78 EMM2013-78 |
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| Conference Information | |
| Committee | EMM EA |
| Conference Date | 2013-11-14 - 2013-11-15 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Prefectural University of Hiroshima, Satellite Campus Hiroshima |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | EMM |
| Conference Code | 2013-11-EMM-EA |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on Semi-Scramble Method for Speech Signals Based on Phonemic Restoration |
| Sub Title (in English) | |
| Keyword(1) | scramble method |
| Keyword(2) | semi-scramble method |
| Keyword(3) | phonemic restoration |
| Keyword(4) | quantization-bit shifting |
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| 1st Author's Name | Katsuhiko Yamamoto |
| 1st Author's Affiliation | Japan Advanced Institute of Science and Technology (JAIST) |
| 2nd Author's Name | Zhi Zhu |
| 2nd Author's Affiliation | Japan Advanced Institute of Science and Technology (JAIST) |
| 3rd Author's Name | Masashi Unoki |
| 3rd Author's Affiliation | Japan Advanced Institute of Science and Technology (JAIST) |
| 4th Author's Name | Naofumi Aoki |
| 4th Author's Affiliation | Hokkaido University (Hokkaido Univ.) |
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| Speaker | Author-1 |
| Date Time | 2013-11-15 09:45:00 |
| Presentation Time | 30 minutes |
| Registration for | EMM |
| Paper # | EA2013-78, EMM2013-78 |
| Volume (vol) | vol.113 |
| Number (no) | no.290(EA), no.291(EMM) |
| Page | pp.59-64 |
| #Pages | 6 |
| Date of Issue | 2013-11-07 (EA, EMM) |
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