Detection of HEVC Double Compression with Different Quantization Parameters Based on Property of DCT Coefficients and TUs

High Efficiency Video Coding (HEVC) double compression detection is of great significance in video forensics. In this paper, a novel algorithm of detection of HEVC video double compression with different Quantization Parameters (QPs) based on Property of DCT Coefficients and TUs (PDCT) feature is proposed. Firstly, the impact of Transforming Unit (TU) type and QP on Discrete Cosine Transform (DCT) coefficients is analyzed. Next, the PDCT feature is extracted based on the statistical characteristics of DCT coefficients and TUs. Then, the framework of our proposed algorithm is given, consisting of four steps described in detail. Finally, experiments are conducted on high definition videos, which are more common in HEVC, while excluding the influence of video content on the detection accuracy. Experimental results and the corresponding analysis are also provided, demonstrating the superiority of the proposed algorithm to the current state-of-the-art algorithm of detecting HEVC double compression with different QPs.