摘要
通过分析H.264中灵活宏块排序FMO(Flexible Macroblock Ordering)技术的特点和NALU(Network Abstract Layer Unit)语法元素的参数,利用编码过程中的FMO机制对图像分片后的宏块进行置乱,采用流密码对码流的网络抽取层单元NALU中的重要参数快速加密,提出一种基于FMO和网络抽取层(NAL)的视频加密方案。实验结果和性能分析表明,与视频加密算法[9]相比,该方案既保持了FMO特性,又有更高的安全性、运行效率高、压缩比影响小的特点。
By analysing H.264 flexible macro-block ordering technology characteristics and NALU syntax element parameters,depending on encoding process FSO mechanism to scramble macro-blocks of image slices,exploiting stream cipher for network abstraction layer（an important NALU parameter） rapid encryption,the thesis proposes an FMO and NAL-based video encryption scheme.Experiment results and performance analysis show that compared with video encryption algorithm[9],the proposed scheme not only keeps FMO characteristics,but also bears higher security,higher operating efficiency,and less compression ratio impact.
出处
《计算机应用与软件》
CSCD
2011年第10期287-290,共4页
Computer Applications and Software
