【作者】 凌贺飞； 卢正鼎； 邹复好；

【Author】 Hefei Ling,Zhengding Lu,Fuhao Zou (College of Computer Science and Technology,Huazhong University of Science and Technology,Wuhan 430074)

【机构】 华中科技大学计算机科学与技术学院；

【摘要】 作为数字视频版权保护的重要手段,视频水印的研究逐渐成为当前数字水印领域中的一个热点和难点。对于压缩视频流,一个比较实用的水印算法必须具备较高的实时性,本文提出一个直接运行在VLC域的实时水印算法——差分数量水印算法(DNW),算法通过移动块结束标志(EOB)强制制造两配对区域中的元组数量差来实现水印比特位的嵌入,DNW算法的计算复杂性比标准VLC域水印算法的减少一半,与差分能量算法(DEW)算法相比,其不需要量化过程,实验结果表明DNW在水印的视觉失真、容量和鲁棒性方面都比DEW性能更好。更多还原

【Abstract】 As a main method for copyright protection of digital video data,video watermarking has gradually become a focus.For compressed video stream,a practical watermarking method must meet the real-time requirement.In this paper a new real-time watermarking,differential number watermarking(DNW),which can be directly performed in the VLC domain,will be proposed.The label bits are embedded in a pattern of number differences between block subsets by selectively removing high frequency components.The DNW algorithm has only half the complexity of other VLC domain watermarking algorithms,and comparing with the differential energy watermarking(DEW)algorithm,it doesn’t need quantization step.The experimental results show that the DNW algorithm performs better on watermark’s visual quality impact,capacity and robustness than the DEW algorithm.更多还原