计算机科学 ›› 2015, Vol. 42 ›› Issue (6): 151-157.doi: 10.11896/j.issn.1002-137X.2015.06.033

• 信息安全 • 上一篇    下一篇

一种改进的H.264运动估计信息隐藏算法

王炜,林夕杰,李孝琴   

  1. 解放军信息工程大学计算机学院 郑州450001;数学与先进计算国家重点实验室 郑州450001,解放军信息工程大学计算机学院 郑州450001;数学与先进计算国家重点实验室 郑州450001,78020部队 昆明650229
  • 出版日期:2018-11-14 发布日期:2018-11-14
  • 基金资助:
    本文受信息工程大学未来基金(1201)资助

Improved Information Hiding Algorithm Based on Motion Estimation of H.264

WANG Wei, LIN Xi-jie and LI Xiao-qin   

  • Online:2018-11-14 Published:2018-11-14

摘要: 基于H.264特有的1/4像素精度运动估计,提出一种改进的mH.264运动估计信息隐藏算法。通过修改宏块中每个分割块的最佳匹配位置,利用分割块匹配位置与待嵌二进制信息之间的映射规则,将信息隐藏到分割块的匹配位置中。信息的提取基于解码器中亮度像素内插过程,不需原始视频参与,属于盲提取机制。实验结果表明,改进的H.264运动估计信息隐藏算法在不明显降低视频质量的前提下提高了隐藏容量,降低了系统开销,具有较高的整体性能。

关键词: 信息隐藏,H.264,运动估计,1/4像素

Abstract: An improved information hiding algorithm based on H.264’s specific motion estimation with quarter-pixel precision was proposed.By modifying every sub-block’s best matching position of macroblock and using the mapping rule between sub-block’s position and binary information,the information is embedded in sub-block’s position.Information extraction based on the interpolation process of luma pixels in decoder of H.264 doesn’t need the original videos and belongs to the blind extraction mechanism.The experiment results demonstrate that the improved information hi-ding algorithm in motion estimation of H.264 increases the hiding capacity and decreases the system cost without decreasing the video quality conspicuously,which has higher integer performance than other algorithms.

Key words: Information hiding,H.264,Motion estimation,Quarter-pixel

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