Detection of Double-Compression in MPEG-2 Videos
Detection of Double-Compression in MPEG-2 Videos
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DOI：
10.1109/iwisa.2010.5473474
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
Yuting Su;Junyu Xu
中科院分区：
文献类型：
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作者：
Yuting Su;Junyu Xu
近年来，随着数字视频摄像机和相关软件的容易获得来操纵视频，确定数字视频的完整性和真实性已经成为一个紧迫和关键的问题。本文提出了一种新的方法来检测经常出现在数字视频篡改的双重MPEG-2压缩。具体来说，我们展示了如何双重压缩的MPEG-2视频序列中引入凸模式的量化DCT系数的分布，其存在可以被用作篡改的证据。利用商用数码摄像机和多媒体编辑软件模拟MPEG-2双重压缩过程，实验结果表明，该方法能有效检测不同输出码率下的MPEG-2双重压缩。良好的测试结果验证了我们提出的算法具有很大的实用价值。
In recent years, with the easy availability of digital video cameras and associated software to manipulate video, ascertaining the integrity and authenticity of digital videos has become an urgent and critical issue. In this paper, we propose a novel approach to detect double MPEG-2 compression which often occurs in digital video tampering. Specifically, we show how a doubly compressed MPEG-2 video sequence introduces convex pattern in the distribution of quantized DCT coefficients whose presence can be used as an evidence of tampering. Some commercial digital video cameras and multimedia editing softwares are introduced to simulate the process of double MPEG-2 compression, and a series of experiments show that the proposed scheme can effectively detect double MPEG-2 compression at different output bit-rates. Excellent test results verify that our proposed algorithm is of great practical value.