摘要
通过分析H.264提出的灵活宏块排序(FMO)的特点,提出了一种随机置乱FMO-map的视频加密方案。此方案通过产生一个随机顺序的码表来置乱FMO-map来达到视频流加密的效果,另外将加密后的随机置乱码表并行输出。通过分析证明此方案在安全性、压缩比改变率和计算复杂度方面都具有良好的性能,能使视频图像的传输具有较好的安全性和实时性。
Based on analysis of the flexible macroblock ordering provided by H. 264, a video encryption algorithm of random scrambling FMO map is proposed. This scheme, through producing a code of random sequence, scrambles FMO-map and thus achieves the encryption of video stream. And then parallel output of the encrypted randomly-scrambled code is implemented. The analysis indicates that this scheme is of good performance in security, compression ratio and computational complexity, and could realize secure and real-time transmission of video images.
出处
《通信技术》
2009年第10期52-53,56,共3页
Communications Technology
关键词
H.264
视频加密
灵活宏块排序
H. 264
video encryption
Flexible Macroblock Ordering（FMO）
