基于汉明码的MPEG-4标准视频精确认证方案  

Accurate Authentication Scheme of MPEG-4 Video Based on Hammming Code

作　　者：刘新平[1] 蒋华[1] 

机构地区：[1]桂林电子科技大学计算机与控制学院,广西桂林541004

出　　处：《武汉大学学报（理学版）》2009年第1期93-96,共4页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(50175070)

摘　　要：针对目前视频认证方案尚不能检测突发的位错误等问题,提出并实现了一种MPEG-4标准的视频精确认证方案,通过对I帧像素进行汉明码编码,结合环面自同构和位旋转进行篡改证明,在增强安全性的同时,对被篡改区域进行定位和恢复.实验结果表明,该方案能有效消除突发的位错误,进行像素级别的完整性认证,篡改定位效果好,恢复精度高,对精确认证、视频抗干扰有较好的可行性和实用性.Up to now,most video authentication schemes are still can not able to detect unexpected bit error and their capability of recovering tampered pixels in detail areas is not satisfactory.An accurate authentication scheme is designed for MPEG-4 video integrality authentication.Coding the pixels in the intra frame with hamming code,the new scheme works on tamper proofing by combining torus automorphism and bit rotation.It can not only increase the security,but also locate and restore the distorted region at the same time.The experimental results show that the proposed scheme can effectively eliminate burst bit errors and carry out the integrity authentication in the pixel-level.It had a good capability of tamper detection,localization and recovery,and demonstrates the feasibility and practicality for the accurate authentication.

关 键 词：汉明码 MPEG-4 像素 视频认证 篡改 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]