Double HEVC Compression Detection with the Same QPs Based on the PU Numbers
Double HEVC Compression Detection with the Same QPs Based on the PU Numbers
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DOI：
10.1051/itmconf/20160702010
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发表时间：
2016
影响因子：
3.7
通讯作者：
Rui-shi Jia;Zhaohong Li;Zhenzhen Zhang;Dongdong Li
中科院分区：
文献类型：
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作者：
Rui-shi Jia;Zhaohong Li;Zhenzhen Zhang;Dongdong Li
双HEVC压缩检测在视频取证中具有重要意义。然而，有效的检测算法的基础上相同的量子点很少有报道。本文提出了一种基于相同Qps的双HEVC压缩检测方法。首先，在编码过程中，提取出视频在相同Qps下压缩时每一I帧中4×4大小的PU块的个数;然后计算压缩前后4×4 PU块差（SDoPU）的标准差。最后根据SDoPU的统计特征选择合适的阈值进行压缩测试分类。通过数值实验，证明了该算法对双重HEVC压缩的检测具有较高的分类精度。
Double HEVC compression detection is of great importance in video forensics. However, effective detection algorithm based on the same Qps is rarely reported. In this paper, a novel method based on the same Qps is applied in dealing with double HEVC compression detection. Firstly, the numbers of PU blocks with the size of 4×4 in each I frame is extracted during the codec procedures when the video is compressed with the same Qps. Then, calculate the standard deviation of 4×4 PU blocks difference (SDoPU) before and after the compression. Finally, select the appropriate threshold for compression testing classification according to the SDoPU statistical feature. By performing numerical experiments, We prove that the proposed algorithm is of high classification accuracy for detecting double HEVC compression.