基于混沌参数调制的语音保密仿真研究  

Research of Voice Security Simulation Based On Chaos Parameter Modulation

作　　者：张轶[1] 李红信[1] 杨丽宁[1] 

机构地区：[1]兰州大学信息科学与工程学院,甘肃兰州730000

出　　处：《微计算机信息》2008年第13期218-220,共3页Control & Automation

基　　金：国家自然科学基金资助项目(60504020)

摘　　要：数字语音保密通信利用离散混沌信号的宽带类噪声特性实现信号的保密传输是混沌应用研究的重要方向。文章在对G.726语音编解码标准分析的基础上提出了一种新的数字语音保密通信实验仿真方法即:利用Matlab的Simulink和Altera的DSP Builder作为开发工具,建立了基于G.726的数字语音编解码仿真模型,并针对ADPCM码流进行混沌同步序列加密及模拟语音信号的重建。仿真中利用了混沌参数调制的加密方法,并且在结果中分析了加密后信号的自相关统计特性。The broadband noise-like characteristic of discrete-time chaos signals is used to realize the encryption transmission of signals in the digital voice secure communication system, which has become an important research direction in the field of chaotic application. In this paper, a new experimental and simulative method of digital voice secure communication is presented based on the analysis to the voice cod-decode standard--G.726, that is, by using Simulink tools in Matlab ＆ DSP Builder tools in Ahera, a digital voice cod-decode simulative model based on the G.726 is established, encrypting the ADPCM code stream with Chaotic Selfsynchronizing Sequence and rebuilding the analog voice signals. In the simulation the encryption method based on chaos parameter modulation is used and the statistic characteristic of self-correction after signal encryption is analyzed in the result.

关 键 词：ADPCM 保密通信 混沌参数调制 

分 类 号：TN918.6[电子电信—通信与信息系统]