摘要
基于语音加密的特殊性,利用可逆二维Arnold变换和改进的Logistic映射进行了混沌加密算法研究,并以TMS320VC5509A为中央处理器提出了语音加密的系统方案,实现了语音的加密和解密.首先介绍了数据加密技术基本原理和方法,然后详细给出了混沌加密系统的软硬件设计方案,并通过DSP芯片实现了混沌语音加密和解密.最后对语音信号进行了模拟仿真和测试,加解密前后的信号和频谱取得了较好的一致性,证实了该混沌语音加密算法的可行性.
Combining with the technologies of invertible two-dimensional Arnold transform and improved algorithm Logistic mapping,a chaotic voice encryption algorithm is investigated based on the particularity of the encryption of voice,and then a voice encryption system solution is proposed to realize the voice encryption and decryption using the Digital Signal Processor TMS320VC5509A. The basic principle and method of data encryption is first introduced and a detailed design plan of software and hardware for the chaotic voice encryption system is presented,at the same time we realize the chaotic voice encryption and decryption using the DSP chip. Finally,through simulation and experimental test for voices,the waveforms and spectrums collected before encryption and after decryption show good agreements with each other,suggesting the feasibility of the proposed chaotic voice encryption algorithm.
出处
《南京师大学报（自然科学版）》
CAS
CSCD
北大核心
2014年第4期59-65,共7页
Journal of Nanjing Normal University(Natural Science Edition)
基金
国家自然科学基金(11274176)
