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.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
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
关键词
视频信息隐藏
压缩域
帧内预测模式
H.264
video information hiding； compressed domain； intra-prediction mode； H. 264
