基于小波变换的视频压缩加密方案

Video Compression and Encryption Scheme Base on Wavelet Transform

针对可伸缩性视频流的安全性问题,提出了一套完整的视频压缩加密的方案。该方案通过小波树的置换和运动矢量加密来保证视频的安全性,并且采用分级加密来满足不同用户对不同质量服务的需求。经试验证明,该方案一方面保持了编码的可伸缩性,另一方面提高了视频流的安全性,并且加密处理对压缩效率影响小,实时性好,适用于网络上的视频流服务。

According to the security of the scalable video stream,an integrated video compression-encryption scheme is proposed.The scheme adopts a wavelet-tree scrambling algorithm to guarantee the security of the video.Furthermore,a multiple levels encryption is proposed to satisfy different consumers＇ requirement.It is proved that this scheme kept the scalability of the encoding,had high security,and had small impact on compression efficiency,so it is suitable for realtime video transferring on the network.