Detection of double compression in HEVC videos based on TU size and quantised DCT coefficients
Detection of double compression in HEVC videos based on TU size and quantised DCT coefficients
复制标题
基于 TU 大小和量化 DCT 系数的 HEVC 视频中的双重压缩检测
DOI：
10.1049/iet-ifs.2017.0555
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发表时间：
2019
影响因子：
1.4
通讯作者：
Xu Dawen
中科院分区：
文献类型：
--
作者：
Li Qian;Wang Rangding;Xu Dawen
随着复杂且低成本的视频编辑软件的出现，数字视频极易被篡改。数字视频的真实性和完整性认证是一个亟待解决的问题。针对视频篡改过程中经常出现的不同量化参数(QP)的双重高效视频编码(HEVC)视频压缩，提出了一种有效的检测方法。首先分析了QP对离散余弦变换(DCT)系数分布和变换单元(TU)大小的影响。然后从量化后的DCT系数和TU大小得到包含17个特征的特征集。它可以表征单压缩视频和双压缩视频之间的统计差异。最后，利用支持向量机分类器库来识别给定的HEVC视频是否经过了双重压缩。实验结果表明，该检测方法具有较好的综合性能。
With the advent of sophisticated and low-cost video editing software, digital videos are highly vulnerable to be tampered. The authenticity and integrity identification of digital videos is an urgent issue. In this study, an effective method to detect double High Efficiency Video Coding (HEVC) video compression with different quantisation parameter (QP) is proposed, which often occurs in the video tampering process. First, the effects of QP on the distributions of Discrete Cosine Transform (DCT) coefficients and Transform Unit (TU) size are analysed. Then a feature set including 17 features is derived from quantised DCT coefficients and TU size. It can characterize the statistical differences between single and double compressed videos. Finally, the Library for Support Vector Machine classifier is exploited to identify whether a given HEVC video has been double compressed or not. Experimental results demonstrate that the authors' detection method has a good comprehensive performance.