基于宏块突变定位帧复制篡改帧方法的研究  

The Method of Locating Copying Tampered Frame Based on Macroblock Mutation

作　　者：廖广军[1] 林晓江 郭晶晶[3] 王宇飞 LIAO Guangjun;LIN Xiaojiang;GUO Jingjing;WANG Yufei(Department of Criminal Science and Technology,Guangdong Police College,Guangzhou 510440,China;Nansha Branch of Guangzhou Public Security Bureau,Guangzhou 511458,China;Institute of Forensic Science,Ministry of Public Security,Beijing 100045,China)

机构地区：[1]广东警官学院刑事技术系,广东广州510440 [2]广州市公安局南沙区分局,广东广州511458 [3]公安部物证鉴定中心,北京100045

出　　处：《中国人民公安大学学报（自然科学版）》2023年第1期39-45,共7页Journal of People’s Public Security University of China(Science and Technology)

基　　金：2021广东省重点建设学科科研能力提升项目(GDZDXK2021-GJ03);教育部科技部司法鉴定技术应用与社会治理学科创新基地重点项目(B20077/FSSGL2021B-05);痕迹科学与技术公安部重点实验室2021年度开放课题(2021FMKFKT07)。

摘　　要：视频资源的海量增长及用户需求的快速变化,视频修改编辑也迅猛发展,必然引起对视频篡改检测的关注。针对帧复制视频篡改检测场景,定位帧复制篡改帧的方法聚焦宏块突变特征,包括P帧化、多帧参考化,倒置编码,分析匹配宏块异常等操作,基本解决后向帧复制及前向帧复制难以定位复制帧的问题。所提的方法对数字视频真实性、完整性的司法鉴定具有较强的实用价值。Massive growth of video resources and rapid changes of users’ demands have given birth to the rapid development of video editing modification,which inevitably arouses attention on tampered video detection.Aiming at the detection scene of the tampered video with copying tampered frame,the method of locating copying tampered frame mainly focuses on the characteristics of macroblock mutation,including converting to P frames,multi-frame reference operation,reversing video and re-encoding.Furthermore,several operations like abnormal match of macroblocks were also analyzed.It has been basically solved that the copying tempered frame is difficult to locate whether in the situation of forward copying or backward copy.The proposed method has strong practical value for judicial authentication of authenticity and integrity of digital video.

关 键 词：宏块突变 帧复制篡改 P帧化 多帧参考化 

分 类 号：D918.2[政治法律—法学]