基于嵌入式系统的数字视频信号加密技术

几种常用数字视频信号加密技术的原理与方法,分析了这些加密方法的优点和存在的不足。提出了一种仅对视频码流中解码和视频图像的重建起着重要作用的少部分数据进行高强度加密的方法,这一方法可以取得对整个视频码流安全加密的效果。

The encryption technique of the digital video based on embedded system

This paper introduces some of the principles and methods in common use of the encryption teclunique of digital video,and analyses the merit and the disadvantage of these encryption methods. It also put forward one method that only high strength encrypt a spot of the important video signal in the decodeing and reconstructing, which can acquire safe encrytion result with the whole stream of video code.