Coherent Video Reconstruction with Motion Estimation at the Decoder

Chapter
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 158)

Abstract

In traditional motion compensated predictive video coding, both the motion vector and the prediction residue are encoded and stored or sent for every predicted block. The motion vector brings displacement information with respect to a reference frame while the residue represents what we really consider to be the innovation of the current block with respect to that reference frame. This encoding scheme has proved to be extremely effective in terms of rate distortion performance. Nevertheless, one may argue that full description of motion and residue could be avoided if the decoder could be made able to exploit a proper a priori model for the signal to be reconstructed. In particular, it was recently shown that a smart enough decoder could exploit such an a priori model to partially infer motion information for a single block given only neighboring blocks and the innovation of that block. This chapter presents an improvement over the single-block method. In particular, it is shown that higher performance can be achieved by simultaneously reconstructing a frame region composed of several blocks, rather than reconstructing those blocks separately. A trellis based algorithm is developed in order to make a global decision on many motion vectors at a time instead of many single separate decisions on different vectors.

Keywords

Video coding Decoder side motion estimation 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Department of Information EngineeringUniversity of Brescia via Branze 38BresciaItaly

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