Fusion Scramble Research of Video Secure Communication Based on H.264 Intra Prediction Macroblock
Zhang Xiao-hon · Video Engineering · 2014
Based on all intra prediction macroblock of I,P,B frame and integer Discrete Cosine Transform DCT(Discrete Cosine Transform),a fusion encryption scheme is put forward.If the current macroblock is a intra prediction macroblock,layers DCT coefficient,mean macroblock coefficient matrix do transposed transformation,and gets 16 new sub-macroblocks.Chaotic system produces a sequence of keys to scramble macroblock and encrypt the coefficient symbol of the sub-macroblocks.The result shows this fusion encryption scheme not only can effectively prevent the block correlation attack and key attack,but also can meet the video security and real-time requirements.