Adaptive stopping strategies for fast intra mode decision in HEVC

Research output: Research - peer-review21_Publication in refereed journal

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Detail(s)

Original languageEnglish
Pages (from-to)1-13
Journal / PublicationJournal of Visual Communication and Image Representation
Volume51
Early online date20 Dec 2017
StatePublished - Feb 2018

Abstract

Fast intra mode decision strategies are proposed to overcome the brute force mode decision for the coding unit (CU) in High Efficiency Video Coding (HEVC). The proposed work improves the rough-mode-decision (RMD) by initializing the candidate intra mode list using the fusion of the Hadamard-cost and the statistical-inference formed using spatial/ temporal correlations. Then an early termination is predicted using optimal stopping theory that addresses early decision for a generic class of decision problems. Subsequently, a novel RD-cost prediction model is developed for early termination that is based on the RD-cost variation in the neighboring CUs with-respect-to their co-located CUs. Experimental results demonstrate that the RMD module of HEVC and the state-of-the-art fast intra mode prediction published method are outperformed by saving up to 0.61% and 0.91% Bjøntegaard delta bit rate (BDBR) on average, respectively.

Research Area(s)

  • Early mode decision, HEVC, Intra mode, RDOQ, RMD, Sum of absolute difference, Video coding