Digital video encryption in AVS compressed stream for real-time transmission
Yuting Su · Jisuanji yingyong yanjiu · 2009
Given the increasingly serious problem on copyright piracy,presented a video encryption method for the AVS standard.By encrypting the motion vectors,it was impossible to achieve the corresponding reference blocks in reconstruction.Furthermore,utilized error propagation to confuse the images.Thus video data could be encrypted efficiently.Such an algorithm brings no change to the structure of the data stream,so it could be decoded by a normal decoder without decrypting,but decreased the quality of the reconstructed image obviously.However,the reconstructed image by decoding with decrypting was almost the same as the original one.Simulating results show that the presented encrypting method has low complexity,trivial impact on coding efficiency,and almost no degrading on the subjective and objective video quality.