Double HEVC Compression Detection with Different Bitrates Based on Co-occurrence Matrix of PU Types and DCT CoefficientsZhao-Hong Li, Rui-shi Jia, Zhen-Zhen Zhang, Xiao-Yun Liang and Jin-Wei WangITM Web Conf., 12 (2017) 01020DOI: https://doi.org/10.1051/itmconf/20171201020