MPEG-2视频中相同码率的双重压缩检测

2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP) Pub Date : 2014-07-09 DOI:10.1109/ChinaSIP.2014.6889253

Zhensheng Huang, Fangjun Huang, Jiwu Huang

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引用次数: 21

摘要

MPEG-2中相同码率的双压缩检测在视频取证领域具有重要意义。然而，当单次压缩和双次压缩的视频具有相同的码率时，目前还没有检测方法的报道。本文提出了一种检测相同码率下MPEG-2双压缩的新方法。我们的方法是基于观察到单压缩和双压缩的MPEG-2视频的I帧之间的不同系数的数量远远大于相应的双压缩和三压缩的MPEG-2视频的I帧之间的不同系数的数量。通过一种新的重压缩策略，可以利用MPEG-2视频的上述特征来区分单压缩和双压缩的MPEG-2视频。在不同比特率下的实验证明了新方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Detection of double compression with the same bit rate in MPEG-2 videos

The detection of double compression with the same bit rate in MPEG-2 is of great significance in the field of video forensics. However, when the singly compressed and the doubly compressed videos have the same bit rate, no detecting method has been reported yet. In this paper, we propose a new method that can detect double MPEG-2 compression with the same bit rate. Our method is based on the observation that the number of different coefficients between I frames of the singly and doubly compressed MPEG-2 videos is much larger than the number of different coefficients between the I frames of the corresponding doubly and triply compressed MPEG-2 videos. Via a new re-compressing strategy, the aforementioned characteristics of MPEG-2 video can be utilized to discriminate the singly compressed and doubly compressed MPEG-2 videos. Various experiments on different bit rates demonstrate the efficiency of our new method.

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2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP)

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