Research of Voice Security Simulation Based On Chaos Parameter Modulation
Yang Li-ning · Microcomputer Information · 2008
The broadband noise-like characteristic of discrete-time chaos signals is used to realize the encryption transmission of sig-nals in the digital voice secure communication system,which has become an important research direction in the field of chaotic appli-cation. 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 Altera,a digital voice cod-decode simulative model based on the G.726 is established,encrypting the ADPCM code stream with Chaotic Self-synchronizing 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.