计算机应用 ›› 2011, Vol. 31 ›› Issue (06): 1508-1511.DOI: 10.3724/SP.J.1087.2011.01508

• 信息安全 • 上一篇    下一篇

基于压缩传感的视频水印算法

周燕,曾凡智   

  1. 佛山科学技术学院 计算机系,广东 佛山 528000
  • 收稿日期:2010-11-22 修回日期:2011-01-13 发布日期:2011-06-20 出版日期:2011-06-01
  • 通讯作者: 周燕
  • 作者简介:周燕(1979-),女,江西抚州人,讲师,硕士,主要研究方向:图像处理、智能信息;曾凡智(1964-),男,湖北武汉人,副教授,博士,主要研究方向:数据挖掘、图像处理。
  • 基金资助:
    广东省自然科学基金资助项目;广东省自然科学基金资助项目

Video watermarking algorithm based on compressive sensing

ZHOU Yan,ZENG Fanzhi   

  1. Department of Computer Science, Foshan University, Foshan Guangdong 528000, China
  • Received:2010-11-22 Revised:2011-01-13 Online:2011-06-20 Published:2011-06-01
  • Contact: ZHOU Yan

摘要: 针对压缩域视频流的完整性认证问题,提出了一种基于压缩传感(CS)的视频水印算法。以H.264压缩视频流为研究对象,通过对视频序列的I帧进行压缩传感随机投影,得到少量的测量值,经过量化和置换加密,最后以水印的方式嵌入到P帧具有最大运动矢量幅值的宏块中。认证时,从含水印视频序列的P帧提取水印,并对I帧进行相同的压缩传感随机投影,通过比较测量值的差异,实现对视频的完整性认证。仿真结果表明,该算法具有较好的视频质量,对码率的影响较小,对帧删除、帧插入、重压缩等攻击具有较强的鲁棒性。

关键词: H.264, 视频水印, 压缩传感, 随机投影, 视频认证

Abstract: For the problem of integrity authentication about compressed video streams, this paper proposed a video watermarking algorithm based on Compressive Sensing (CS). The H.264 compressed video stream was taken as the research object. By conducting random projection on the I frames of video sequences, a slight amount of measurements were obtained. Through quantization and replacement encryption, the measurements were embedded into the macro block which had the maximum amplitude in the motion vector in P frame. While authenticating, the watermark was extracted from the P frame that contains watermarked video sequences, and the similarly random CS projection on the I frames was conducted. By comparing the difference between the measurements, the integrity of video could be authenticated. The simulation results show that the intended video watermarking algorithm ensures high video quality, and little effect on the encoding rate, and it has strong robustness against attacks such as frame deletion and frame insertion.

Key words: H.264, video watermarking, Compressive Sensing (CS), random projection, video authentication

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