上海交通大学学报(自然版) ›› 2011, Vol. 45 ›› Issue (10): 1531-1535.

• 自动化技术、计算机技术 • 上一篇    下一篇

基于VLC域的H.264/AVC视频流内容级认证水印算法

林志高a,孙锬锋a,b,蒋兴浩a,b   

  1. (上海交通大学 a.信息安全工程学院,b.上海市信息安全综合管理技术研究重点实验室, 上海 200240)
  • 收稿日期:2010-11-03 出版日期:2011-10-31 发布日期:2011-10-31
  • 基金资助:

    国家自然科学基金项目(60802057,61071153),国家高技术研究发展计划(863)项目(2009AA01Z407),上海市青年科技启明星计划(10QA1403700),教育部新世纪优秀人才支持计划(NCET-10-0569)资助项目

A Content Level Watermarking Scheme for H.264/AVC Video Authentication in VLC Domain

 LIN  Zhi-Gao-a, SUN  Tan-Feng-a, b , JIANG  Xing-Hao-a, b   

  1. (a.School of Information Security Engineering; b.Shanghai Information Security Management and Technology Research Key Lab, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2010-11-03 Online:2011-10-31 Published:2011-10-31

摘要: 针对低比特率的H.264/AVC(Advanced Video Coding)视频流,提出一种新颖的基于VLC(VariableLength Coding)域的内容级的半脆弱水印认证算法.利用视频VLC域中I宏块的预测方式、CBP(Coded Block Pattern)块编码模式,自适应选取提取特征码的宏块,并根据子宏块上量化后系数的低频能量之间的关系,构建基于宏块级别的内容特征码;鉴于子宏块中拖尾系数的特点,通过修改拖尾系数的编码方式实现半脆弱认证水印的嵌入.实验证明,该算法能保持特征码嵌入前后视频良好的不可感知性以及视频流码率的基本恒定;能有效提高视频水印嵌入容量;可有效实现针对视频内容篡改的宏块级别的检测和定位.该算法可应用于视频内容鉴定,版权保护等领域.
 

关键词: 视频水印, 内容认证, 变长编码域, 半脆弱水印

Abstract: For low bit-rate H.264/AVC video, this paper proposed a semi-fragile content authentication algorithm in VLC domain. Utilizing the intra prediction mode and coded block pattern in VLC domain, the algorithm chooses those macro-blocks. The signature is extracted according to the relationship between the energies of quantized low-frequency coefficients of submacroblocks from these macro-blocks, embedded by modifying the trailing coefficients. The experimental results show that this algorithm performs well in visual quality impact, keeps the bitrate basically unchanged and enhances the watermark capacity. By verifying the extracted signature, the algorithm can efficiently detect and locate the tampering on the video with high real-time.
 

Key words: video watermarking, content authentication, variablelength coding (VLC) domain, semifragile watermarking

中图分类号: