一种低比特率增长的H.264视频信息隐藏算法  

A data hiding algorithm with low bit rate growth for H.264 video

作　　者：魏芳芳[1] 王宏霞[1] 吴锡溪 

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》2014年第6期1182-1188,共7页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61170226);成都市科技计划(12DXYB214JH-002)资助项目

摘　　要：提出一种基于预测模式调制的H.264视频信息隐藏算法。在H.264视频的帧内预测过程,通过调制I帧4×4亮度块的帧内预测模式实现隐秘信息的嵌入。调制方法是基于宿主4×4亮度块的边缘强度(DES)划分的映射规则进行的,从而避免了信息隐藏后视频流的比特率的过快增长。同时,通过结合矩阵编码技术使得修改一个预测模式可以隐藏4bit信息。在信息提取过程中,不需要对含密视频进行完全解码,只需获取含密视频的帧内预测模式即能提取秘密信息。实验结果表明,本文算法在提高隐藏容量和保证视频质量的同时,也有效避免了比特率的过快增长。A novel data hiding algorithm with prediction mode modulating for H.264video is proposed.Secret data is embedded by modifying the intra prediction modes of the qualified intra 4×4luma blocks during the processes of intra prediction.This modulation is based on the mapping rules formed by the dominant edge strength of host 4×4luma blocks,in order to avoid the fast increasing of the video stream′s bit rate.At the same time,by utilizing the matrix coding,four watermark bits are hidden by quantifying one intra-4×4block′s mode.The detection of hidden information merely requires to decode the intra prediction modes from bit stream rather than decode the whole video.Experimental results show that the proposed method can improve the capacity of hidden information and ensure the quality of video,also avoid the rapid growth of the bit rate effectively.

关 键 词：信息隐藏 H 264 帧内预测模式 边缘强度(DES) 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]