摘要
论文主要研究了在没有数字水印和数字签名的情况下,依据数字视频文件本身的特性对其真实性做出鉴定。同时,针对一种常用的视频文件编码格式——MPEG进行分析和研究,利用预测残差在篡改后会周期性出现显著变化的特征,可以检测出视频文件是否经过了删除或插入某几帧的篡改操作,从而为司法鉴定提供判断的依据。
In this paper the technique for detecting traces of tampering in digital video is studied under with no digital watermark or signature embedded in. In the lignt of the characteristics of the video itself, the widely used MPEG video sequence is specifically analyzed the find periodic perturbations of the tampered prediction error is identified. The presence of periodic perturbations can be used as an evidence of insertion or deletion tampering.
出处
《信息安全与通信保密》
2008年第12期128-130,共3页
Information Security and Communications Privacy
基金
上海市科委"声像鉴定关键技术研究"课题资助(课题编号:052112035)
关键词
视频篡改
司法鉴定
预测残差检测
Digital Video Forgery
Judicial Authentication
Prediction Error Detection
