Fast HEVC Intra Prediction Algorithm with Enhanced Intra Mode Grouping Based on Edge Detection in Transform Domain
Miso Park, Jechang Jeong · Journal of Advances in Computer Networks · 2015
High efficiency video coding (HEVC) is the next generation video coding standard which intended to provide not only substantially improved video quality with the same bit rate but also achieved compression ratio up to 50% compare to H.264/AVC.To accomplish data compression, HEVC adopted different coding tools such as coding tree unit (CTU), increased number of intra prediction modes, Sample Adaptive Offset (SAO) and so on.In this paper, we deal with intra prediction which has high computational complexity due to the number of prediction modes.To lessen computational load, proposed algorithm suggest two methods.Firstly, proposed algorithm converted each PU into transform domain to classify major directionality.Depend on directionality, classified intra mode group is provided as candidate modes.Secondly, we update intra mode group with certain conditions.Compared to HM 14.0, proposed algorithm provided more than 25% of encoding time reduction with insignificant coding efficiency loss. Index Terms-Fast intra mode decision