Efficient Parallel Framework for HEVC Deblocking Filter on Many-Core Platform

Summary form only given. Many-core platforms are good candidates for speeding up High Efficiency Video Coding (HEVC) in the case that HEVC can provide sufficient parallelism. As the most promising proposal for parallelizing HEVC deblocking filter (DF), the order-changed parallel method (OCPM) changes the order of filtering and incurs considerable loss in coding efficiency. Meanwhile, the parallelism of OCPM still has some room for improvement. In this paper, we propose an efficient parallel framework for HEVC DF, which exploits the implicit parallelism and keeps the filtering order of DF unchanged. Compared with the well-known OCPM, experiments conducted on a 64-core system show that our proposed method saves averagely 37.18% and 37.93% DF time with different quantization parameters (QPs). Meanwhile, our proposed method improves coding efficiency, which achieves an average BD-rate reduction of 0.09%, 0.11% and 0.12% for Y, U and V components, respectively.