IMPROVING THE PARALLELIZATION EFFICIENCY OF HEVC DECODING

In this paper we present a new parallelization approach for HEVC decoding called Overlapped Wavefront (OWF). It is based on wavefront processing and improves its paral-lelization efficiency by allowing overlapped execution of consecutive pictures. Furthermore, in this strategy of the de-coding steps are performed on a CTB basis rather than on a picture basis, which improves data locality. Our implemen-tation achieves between 29.6%, 42.4%, and 66.6 % higher frame rates compared to previous results and 11.3%, 21.0%, and 38.0 % higher frame rates compared to Tiles, for 2160p, 1600p, and 1080p, respectively. Index Terms — HEVC, video codecs, parallel processing