基于脆弱水印的H.264视频流完整性认证  

Fragile Watermark Based Integrality Authentication for H.264 Video Stream

作　　者：杨高波[1] 李俊杰[1] 王小静[1] 刘争艳[1] 

机构地区：[1]湖南大学计算机与通信学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2009年第6期67-71,共5页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(60702065);湖南省青年骨干教师培养对象资助项目(2008)

摘　　要：针对H.264/AVC视频流的完整性认证问题,提出了一种基于脆弱水印的认证算法.根据公钥密钥,提取I帧的特征信息生成认证码,并以水印的形式嵌入到P,B帧的运动矢量中.在视频认证时,只需要部分解码视频流,并不需要原视频作参考.仿真实验结果表明,本算法具有较小的码率变化和视频失真,并能有效地对I,P和B帧进行完整性认证.In order to solve the problem of integrity authentication for low hit-rate video, a new video authentication scheme based on fragile watermark was proposed. According to public-key and secret-key, the authentication code was created from the character information of the inter frame. The authentication information was embedded into motion vector of the P frame and B frame as the watermark. The integrity authentication could he carried out by partially decoding the video stream, and did not need the original video stream for watermark detection. Experiment results have shown that the proposed approach can maintain a slight bit-rate increase and visual distortion, and can authenticate I, P and B frames effectively.

关 键 词：水印 完整性认证 视频认证 脆弱水印 H.264/AVC 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]