Heuristics for tile parallelism in HEVC
Autor
Koziri M., Papadopoulos P.K., Tziritas N., Giachoudis N., Loukopoulos T., Khan S.U., Stamoulis G.I.Fecha
2017Language
en
Materia
Resumen
HEVC has emerged as the new video coding standard promising increased compression ratios compared to its predecessors. This performance improvement comes at a high computational cost. For this reason, HEVC offers three coarse grained parallelization potentials namely, wave front, slices and tiles. In this paper we focus on tile parallelism which is a relatively new concept with its effects not yet fully explored. Particularly, we investigate the problem of partitioning a frame into tiles so that in a resulting one on one tile-CPU core assignment the cores are load balanced, thus, maximum speedup can be achieved. We propose various heuristics for the problem with a focus on low delay coding and evaluate them against state of the art approaches. Results demonstrate that particular heuristic combinations clearly outperform their counterparts in the literature. © EURASIP 2017.