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https://hdl.handle.net/10119/12890
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| Title: | Study on scramble method for speech signal by using random-bit shift of quantization |
| Authors: | Zhu, Zhi
Yamamoto, Katsuhiko
Unoki, Masashi
Aoki, Naofumi |
| Keywords: | speech scramble
random bit shift
PCM speech signal
secure voice |
| Issue Date: | 2014 |
| Publisher: | 信号処理学会 |
| Magazine name: | Journal of Signal Processing |
| Volume: | 18 |
| Number: | 6 |
| Start page: | 303 |
| End page: | 307 |
| DOI: | 10.2299/jsp.18.303 |
| Abstract: | Speech scrambling aims to eliminate 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 can 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. |
| Rights: | Copyright (C) 2014 信号処理学会. Zhi Zhu, Katsuhiko Yamamoto, Masashi Unoki, and Naofumi Aoki, Journal of Signal Processing, 18(6), 2014, 303-307. http://dx.doi.org/10.2299/jsp.18.303 |
| URI: | https://hdl.handle.net/10119/12890 |
| Material Type: | publisher |
| Appears in Collections: | b10-1. 雑誌掲載論文 (Journal Articles)
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