This paper presents a fine granular multilevel parallel algorithm for HEVC decoding, which is focus on two modules: the pixel reconstruction and the in-loop filter (ILF). Firstly, in the pixel reconstruction module, the problem of unbalanced load among decoding threads may occur in parallel decoding algorithm based on CTU rows, like wavefront parallel processing (WPP), because there may be big differences in the processing complexity of CTUs within various CTU rows. In order to solve this issue, we propose a fine granular parallel algorithm based on WPP. Then, a fast fusion ILF algorithm has been presented in the ILF module, which realizes the deep coupling between DBF and SAO by a new CTU-like process unit. Furthermore, the introduction of pipeline parallel technology makes a latency reduction between the two modules. We implement our method on Tilera-GX36 multi-core platform, each task executed by a thread bound to a separate core, which makes full use of the parallel computing performance. The experimental results show that the speedup of our proposed algorithms are 1.2, 1.13 and 1.8 times higher than that of those previous schemes respectively.

Fine Granular Multilevel Parallel Algorithm for HEVC Decoding Based on Tilera-GX36 Multi-core Platform

In1 this paper, a new parallel acceleration scheme for the High Efficiency Video Coding (HEVC) decoder based on multicore platform is proposed. In this article we will focus our research on the following two aspects: Deblocking filter module, and HEVC parallel decoding method based on task level and data level. For these two modules, we propose a series of parallel optimization algorithms. Firstly, based on previous research, we propose a more efficient parallel deblocking filtering method based on CTU units, and then, Based on a multi-core platform, we propose a HEVC parallel decoding method combining task level and data level. From the experimental data, we can see that the parallel algorithm based on multicore platform has significantly improved the parallel speedup at different QP values, and the maximum speedup has reached 14.71. The high efficiency HEVC parallel decoder designed in this thesis can complete the real-time decoding of high HD, Ultra HD streams without any encoding tools.

Parallel Acceleration Scheme of HEVC Decoder Based on Multicore Platform

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Parallel Acceleration Scheme of HEVC Decoder Based on Multicore Platform