invertible systems meaning in English

逆系统

Then based on it an audio encryption algorithm is proposed by adopting module operation , which has nice encryption characters in the simulation . another audio encryption algorithm based on zero dynamical nonlinear invertible system is studied and improved . in order to compare the encrypiton characters between the improved and the original algorithm , their applications to audio encryption are simulated , and the corresponding results are shown in chapter 3
本文的主要成果有:提出了一种混沌实值序列的生成方法,并在此基础上引入模变换对语音信号进行加密,经实验仿真可以得到良好的加密效果;对零动态可逆混沌语音加密通用模型的一个具体加密算法进行了改进,并通过仿真实验比较了改进前后算法的加密性能。