一种基于预测模式的H.264视频信息隐藏算法  

An information hiding algorithm based on intra-prediction modes for H.264 video stream

作　　者：尹秋来[1] 王宏霞[1] 赵杨[1] 

机构地区：[1]西南交通大学信息科学与技术学院,四川成都610031

出　　处：《光电子．激光》2012年第11期2194-2199,共6页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61170226);中央高校基本科研业务费专项资金(SWJTU11CX047);成都市科技计划(12DXYB214JH-002)资助项目

摘　　要：提出了一种基于帧内预测模式调制的H.264视频信息隐藏算法。在模式选择过程,通过调制I帧亮度的4×4块的预测模式实现信息隐藏。通过引入嵌入/提取矩阵,使得在修改一个4×4块的预测模式时,能够嵌入3比特信息。在信息提取过程,不需要原始视频,也不需要完全解码,只需对帧内预测模式解码即可。实验结果表明,本文算法能大幅提高信息隐藏容量,且保证了视频感知质量,对比特率变化影响不大。A new information hiding algorithm with prediction mode modulating for H. 264 video is pro- posed. The secrect information is embedded by modifying intra-prediction modes of intra-4 × 4 blocks during the mode decision process. By utilizing an embedding/extracting matrix, three watermark bits are hidden while only one intra-4 × 4 block＇s mode is changed. The detection of hidden information needs no original media,and merely requires to decode the intra-prediction modes of bit stream rather than to de code the whole video. Experimental results demonstrate that the proposed approach can effectively im- prove the capacity of hidden information with little bit rate increase and no quality degradation.

关 键 词：视频信息隐藏 压缩域 帧内预测模式 H.264 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]