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基于LDPC码的盲视频水印算法研究(英文)
引用本文:许拔,张仲明,何英亮,张尔扬.基于LDPC码的盲视频水印算法研究(英文)[J].重庆邮电学院学报(自然科学版),2009(6).
作者姓名:许拔  张仲明  何英亮  张尔扬
作者单位:国防科学技术大学电子科学与工程学院;湖南大学计算机与通信学院;
摘    要:根据视频水印系统和数字通信系统相似的特性,提出了一种基于LDPC码的盲视频水印算法。水印信息经随机置换与LDPC编码,对经过二次整数变换之后的直流分量进行修改实现水印的嵌入。为了兼顾水印的不可见性与鲁棒性的要求,根据水印长度和变换之后系数的大小自适应地选择嵌入水印的组及系数的改变强度。实验结果表明,该算法能够保证很好的视频质量,视频帧的PSNR值高于50 dB,并实现了水印的盲提取。对于常见的视频攻击有较强的鲁棒性,在码率高于汉明界推导出的下限的情况下,算法鲁棒性随着码率的减小而增强。

关 键 词:低密度奇偶校验码  整数变换  盲视频水印  汉明界  

A study of blind video watermarking algorithm based on low-density parity-check codes
XU Ba,ZHANG Zhong-ming,HE Ying-liang,ZHANG Er-yang.A study of blind video watermarking algorithm based on low-density parity-check codes[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2009(6).
Authors:XU Ba  ZHANG Zhong-ming  HE Ying-liang  ZHANG Er-yang
Institution:XU Ba1,ZHANG Zhong-ming1,HE Ying-liang2,ZHANG Er-yang1(1.College of Electronics Science , Engineering,National University of Defense technology,Changsha 410073,P.R.China,2.College of Computer , Communication,Hunan University,Changsha 410082,P.R.China)
Abstract:According to the comparability between the video watermarking system and the digital communication system,a blind video watermarking algorithm based on LDPC is proposed in this paper.The watermarking information that is stochastically permuted and coded by LDPC is embedded in the modified DC components which are attained by integer transform twice.To balance between invisibility and robustness of watermark,it utilizes the length of the watermark and the value of the transformed coefficients to adaptively se...
Keywords:low density parity check codes(LDPC)  integer transform(IT)  blind video watermarking  Hamming bound  
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