Dyadic spatial resolution reduction transcoding for H.264/AVC

Jan De Cock, Stijn Notebaert, Kenneth Vermeirsch, Peter Lambert, Rik Van de Walle
2010 Multimedia Systems  
In this paper, we examine spatial resolution downscaling transcoding for H.264/AVC video coding. A number of advanced coding tools limit the applicability of techniques which were developed for previous video coding standards. We present a spatial resolution reduction transcoding architecture for H.264/AVC, which extends open-loop transcoding with a low-complexity compensation technique in the reduced-resolution domain. The proposed architecture tackles the problems in H.264/AVC and avoids
more » ... l artifacts in the transcoded sequence, while keeping complexity significantly lower than more traditional cascaded decoder-encoder architectures. The refinement step of the proposed architecture can be used to further improve rate-distortion performance, at the cost of additional complexity. In this way, a dynamiccomplexity transcoder is rendered possible. We present a thorough investigation of the problems related to motion and residual data mapping, leading to a transcoding solution resulting in fully compliant reduced-size H.264/AVC bitstreams.
doi:10.1007/s00530-009-0180-2 fatcat:hlpjfxl7i5guvckgan42szsopm