针对语音音频在传输过程中数据信号大、抗干扰能力弱的问题,本文提出了Lorenz反同步算法的语音音频加密的数字化网络传输控制,设计了语音音频数字化网络传输系统,采用WM8978进行语音音频的采集,采用STM32F405单片机对语音音频进行混叠滤波即数字化处理,实现语音音频在此范围内的频谱提取;还设计了语音音频数据通信系统,在硬件的基础上搭建了系统软件平台,并开发了应用程序,进行语音音频的数据通信;最后,采用复Lorenz反同步算法实现对语音音频的加密。实验结果表明,本文设计的语音音频数字化网络传输系统在语音数字化测试中与标准值的误差最小为0.006,并且传输速度快,在语音数据量为3M时传输时间为11 ms。
Abstract
Aiming at the problem of large data signal and weak anti-interference ability in the process of voice and audio transmission,the digital network transmission control of voice and audio encryption based on Lorenz anti-synchronization algorithm is proposed,and a voice and audio digital network transmission system is designed,and WM8978 is used for voice and audio acquisition.STM32F405 is used to perform aliasing filtering of voice audio,that is digital processing,to achieve spectrum extraction of voice and audio within this range.A voice and audio data communication system is also designed,a system software platform is built on the basis of hardware,and an application program is developed to carry out voice and audio data communication.Finally,the complex Lorenz anti-synchronization algorithm is used to encrypt the voice and audio.The experiment results show that the voice and audio digital network transmission system studied in this paper has a minimum error of 0.006 from the standard value in the voice digital test,and has the fastest transmission speed.When the voice data volume is 3M,the transmission time is 11 ms.
关键词
语音音频 /
网络传输 /
复Lorenz反同步 /
S3C2440 /
STM32F405
Key words
voice and audio /
network transmission /
complex Lorenz desynchronization /
S3C2440 /
STM32F405
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