MPEG-2 Prediction Residue Analysis

Based on the use of synthetic signals and autoregressive models to characterize temporal dependencies and inter prediction processes, a semi-analytic model is built to explain the evolution of the prediction residue in MPEG-2 double compressed video sequences. This characterization provides valuable insights on the behavior of the Variation of Prediction Footprint (VPF) exploited by different methods in the video forensics field, and also shows that the performance of the VPF-based techniques for GOP size estimation and double compression detection depend on the deadzone width of the scalar quantizers used for encoding each type of MacroBlock (MB).