A new scheme for covert communication via 3G encoded speech
A new scheme for covert communication via 3G encoded speech
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一种通过 3G 编码语音进行隐蔽通信的新方案
DOI：
10.1016/j.compeleceng.2012.05.003
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发表时间：
2012-11-01
影响因子：
4.3
通讯作者：
Al-hawbani, Ammar
中科院分区：
文献类型：
--
作者：
Miao, Haibo;Huang, Liusheng;Al-hawbani, Ammar
近年来，通过3G网络的移动的通信快速增长。通过3G语音信道传输秘密消息可能是有意义的。在本文中，我们介绍了一种新的隐蔽通信方案，通过自适应多速率宽带（AMR-WB）编码的语音。提出了一种自适应次优脉冲组合约束（ASOPCC）方法，用于在AMR-WB压缩语音信号中嵌入数据。该方法利用代数码本的非穷举搜索所产生的“冗余”来对秘密信息进行编码。嵌入因子eta用于控制嵌入比特。通过合理设置eta，ASOPCC可以在编码模式切换过程中更好地兼顾语音质量和嵌入容量。实验结果表明，该方法具有较高的容量和良好的不可见性。虽然ASOPCC在本文中仅应用于AMR-WB编解码器，但它可以进一步用于任何基于代数编码的线性预测（ACELP）的语音编码。(C)2012爱思唯尔有限公司保留所有权利。
Mobile communication through 3G network has grown rapidly in recent years. It might be of interest to transmit secret messages over 3G voice channels. In this paper, we introduce a new covert communication scheme via Adaptive Multi-Rate Wideband (AMR-WB) encoded speech. An adaptive suboptimal pulse combination constrained (ASOPCC) method is presented to embed data on compressed speech signal of AMR-WB codec. The method takes advantage of the "redundancy", created by non-exhaustive search of algebraic code-book, to encode secret information. An embedding factor eta is used to control embedding bits. By properly setting eta, ASOPCC can offer a better trade-off between speech quality and embedding capacity in the process of coding mode switching. Experimental results show that the proposed method is quite promising for both high capacity and good imperceptivity. Although ASOPCC is only applied to AMR-WB codec in this article, it can be further used by any other speech coding based on Algebraic Coded Exited Linear Prediction (ACELP). (C) 2012 Elsevier Ltd. All rights reserved.