IEEE Trans Image Process - Regional bit allocation and rate distortion optimization for multiview depth video coding with view synthesis distortion model.

Tópicos

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Resumo

In this paper, we propose a view synthesis distortion model (VSDM) that establishes the relationship between depth distortion and view synthesis distortion for the regions with different characteristics: color texture area corresponding depth (CTAD) region and color smooth area corresponding depth (CSAD), respectively. With this VSDM, we propose regional bit allocation (RBA) and rate distortion optimization (RDO) algorithms for multiview depth video coding (MDVC) by allocating more bits on CTAD for rendering quality and fewer bits on CSAD for compression efficiency. Experimental results show that the proposed VSDM based RBA and RDO can improve the coding efficiency significantly for the test sequences. In addition, for the proposed overall MDVC algorithm that integrates VSDM based RBA and RDO, it achieves 9.99% and 14.51% bit rate reduction on average for the high and low bit rate, respectively. It can improve virtual view image quality 0.22 and 0.24 dB on average at the high and low bit rate, respectively, when compared with the original joint multiview video coding model. The RD performance comparisons using five different metrics also validate the effectiveness of the proposed overall algorithm. In addition, the proposed algorithms can be applied to both INTRA and INTER frames.

Resumo Limpo

paper propos view synthesi distort model vsdm establish relationship depth distort view synthesi distort region differ characterist color textur area correspond depth ctad region color smooth area correspond depth csad respect vsdm propos region bit alloc rba rate distort optim rdo algorithm multiview depth video code mdvc alloc bit ctad render qualiti fewer bit csad compress effici experiment result show propos vsdm base rba rdo can improv code effici signific test sequenc addit propos overal mdvc algorithm integr vsdm base rba rdo achiev bit rate reduct averag high low bit rate respect can improv virtual view imag qualiti db averag high low bit rate respect compar origin joint multiview video code model rd perform comparison use five differ metric also valid effect propos overal algorithm addit propos algorithm can appli intra inter frame

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