On the computation of warping-based motion compensation in video sequence coding

摘要

The paper illustrates a method for affine warping-based motion compensation using the computing architecture of H263 advanced prediction (AP) mode, namely, changing the (constant) weighting matrices in the H263 AP algorithm. In particular, we analytically derive a realization of affine image prediction based on a regular mesh in presence of linear resampling. The work shows, by means of analytical derivation and simulation results, an intrinsic similarity relationship between the affine motion model and the H.263 advanced prediction technique. The analysis offers a rational basis to explain the performance of H.263 AP as a coarse approximation of affine prediction.