On the Efficiency of View Synthesis Prediction for 3D Video Coding

We study the efficiency of view synthesis prediction (VSP). The proposed spectral domain analysis relates the power spectral density of the VSP error to the probability density function of the warping error. The analysis takes into account the warping error induced by (i) depth coding and (ii) disparity rounding at integer-pel, half-pel and quarter-pel warping accuracy. The interaction between VSP efficiency and interpolation filter is also studied. We validate our proposed model with empirical data. Using the proposed model, we discuss the interaction between prediction efficiency, depth image distortion, warping accuracy and interpolation filter. The proposed model provides theoretical insights of VSP in 3D-HEVC. It could be used to guide optimization of VSP designs.