Paper Abstract and Keywords |
Presentation |
2014-03-07 15:00
[Poster Presentation]
Study on scramble method for speech signal by using random bit shift of quantization Zhi Zhu, Katsuhiko Yamamoto, Masashi Unoki (JAIST), Naofumi Aoki (Hokkaido Univ.) EMM2013-109 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Speech scrambling aims to eliminate the intelligibility of original speech in order to preventing eavesdropping and copyright infringement. There is, however, a problem in that completely recovering scrambled speech into the original speech cannot be achieved with conventional methods. In this paper, we propose a speech scrambling method that uses the random-bit-shift of quantization bits with common keys. We evaluated the confidentiality and efficiency of the proposed method by using two objective measures, SER and PESQ. As a result we confirmed that speech signals could be scrambled into completely unintelligible sounds with the proposed method. Moreover, it is possible to restore a scrambled speech signal into the original one completely. In addition, we also confirmed that the scrambled speech signal could not be descrambled correctly with the wrong key. Finally, in order to increase the confidentiality, we investigated possibility of improved method, that randomizes the order of samples in addition to the proposed method. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Speech Scramble / Random Bit Shift / PCM Speech Signal / Secure Voice / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 113, no. 480, EMM2013-109, pp. 57-62, March 2014. |
Paper # |
EMM2013-109 |
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) |
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EMM2013-109 |
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 |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Study on scramble method for speech signal by using random bit shift of quantization |
Sub Title (in English) |
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Speech Scramble |
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Random Bit Shift |
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PCM Speech Signal |
Keyword(4) |
Secure Voice |
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1st Author's Name |
Zhi Zhu |
1st Author's Affiliation |
Japan Advanced Institute of Science and Technology (JAIST) |
2nd Author's Name |
Katsuhiko Yamamoto |
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 |
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Date Time |
2014-03-07 15:00:00 |
Presentation Time |
120 minutes |
Registration for |
EMM |
Paper # |
EMM2013-109 |
Volume (vol) |
vol.113 |
Number (no) |
no.480 |
Page |
pp.57-62 |
#Pages |
6 |
Date of Issue |
2014-02-28 (EMM) |
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