应用于高清视频的数字水印改进算法  

A VIDEO WATERMARKING IMPROVED ALGORITHM APPLIED IN HD VIDEO

作　　者：武晶晶[1] 杨峰[1] 

机构地区：[1]山东师范大学信息科学与工程学院,济南250014

出　　处：《山东师范大学学报（自然科学版）》2013年第4期42-44,共3页Journal of Shandong Normal University(Natural Science)

摘　　要：基于高清数字视频对水印的要求,以及对H.264编码和现有的基于DCT变换视频水印算法的研究,提出一种基于DCT变换AC系数的自适应视频水印算法,自适应选择Ⅰ帧纹理块作为嵌入块；通过计算AC系数方差选择修改系数嵌入水印信息；为了减少水印嵌入量和增加水印鲁棒性,采用Arnold置乱和改进的秘密共享方案对水印进行预处理.该算法充分保证了水印的不可见性,同时具有一定的鲁棒性,具有一定的理论和实际应用价值.Basing on the demands of high-definition digital video to watermarking,as well as to the h.264 coding and current research on video watermarking algorithm based on DCT transform,we put forward a adaptive video watermarking algorithm based on AC coefficients of DCT transform.The algorithm chooses the I frame texture block as embedded block,embedding watermark information by changing AC coefficients,which are determined by calculating the variance.In order to decrease the watermark embedding and watermark robustness,we use Arnold scrambling and secret sharing scheme about watermarking preprocessing for improvement.The algorithm fully guarantees the invisibility of watermarking,has a certain robustness at the same time,and has certain theory and practical application value.

关 键 词：高清视频 视频水印 秘密共享 DCT系数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]