面向网络语音隐写的抗分组丢失联合编码  

Anti-packet-loss joint encoding for voice-over-IP steganography

作　　者：高瞻瞻[1] 汤光明[1] 张伟伟[2] GAO Zhan-zhan TANG Guang-ming ZHANG Wei-wei(PLA Information Engineering University, Zhengzhou 450001, China Graduate Brigade, PLA University of Foreign Languages, Luoyang 471003, China)

机构地区：[1]解放军信息工程大学,河南郑州450001 [2]解放军外国语学院研究生大队,河南洛阳471003

出　　处：《通信学报》2016年第11期146-155,共10页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61272488);河南省科技攻关基金资助项目(No.122102210047);全军军事类研究生基金资助项目(No.2015JY125)~~

摘　　要：VoIP(voice over IP)是基于UDP/IP协议族的语音通信技术,当信道环境变差时不可避免地会产生网络分组丢失,这给建立在其上的VoIP隐写的可靠传输带来了挑战。提出利用纠删码对秘密信息进行冗余预处理,再结合矩阵嵌入编码实现最小失真的隐写,从而建立了基于联合编码的嵌入和提取模型。在此基础上,分析了关键参数对联合编码性能的影响并给出了最优参数的选取算法。实验结果表明,所提联合编码能够有效提高隐写系统的抗分组丢失能力,且能减少对语音流的修改。VolP （voice over IP） is a kind of voice communication technology based on UDP/IP protocols. Packet loss will inevitably happen when the channel environment deteriorates, which can pose challenges to the reliable transmission of VolP steganography. A steganographic model based on joint encoding was proposed. In this model, packet erasure coding was introduced to preprocess the secret data. And the encoded data were embedded into voice packets with minimum dis- tortion using matrix embedding. Furthermore, the influences of key parameters on the performance of joint coding were studied. The selection algorithm for optimal parameters was also given. Experimental results show that the proposed joint coding can effectively improve steganographic resistance to packet loss, and decrease the number of modifications to the voice stream.

关 键 词：VoIP隐写 联合编码 分组丢失恢复 纠删码 矩阵嵌入 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]