Low complexity encoder optimization for HEVC

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

13 Scopus Citations
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Author(s)

  • Shanshe Wang
  • Falei Luo
  • Siwei Ma
  • Xiang Zhang
  • Debin Zhao
  • Wen Gao

Detail(s)

Original languageEnglish
Pages (from-to)120-131
Journal / PublicationJournal of Visual Communication and Image Representation
Volume35
Online published17 Dec 2015
Publication statusPublished - Feb 2016
Externally publishedYes

Abstract

High Efficiency Video Coding (HEVC) improved the coding efficiency significantly. Compared to its predecessor H.264/AVC, it can provide equivalent subjective quality with more than 57% bit rate reduction. However, the improvement on coding efficiency is obtained at the expense of much more intensive computation complexity. In this paper, based on an overall analysis of computation complexity at the HEVC encoder, a low complexity encoder optimization scheme is proposed by reducing the number of available candidates for evaluation in terms of the intra prediction mode decision, early termination of coding unit (CU) splitting and adaptive reference frame selection. With the proposed scheme, the rate distortion optimization (RDO) technique of HEVC can be implemented in a low-complexity way for complexity-constrained encoders. Experimental results demonstrate that, compared with the original HEVC reference encoder implementation, the proposed optimization scheme can achieve more than 40% complexity reduction on average with coding performance degradation as only 0.43% which can be ignorable.

Research Area(s)

  • CU splitting, Encoder optimization, HEVC, Intra mode decision, Low complexity, Rate distortion optimization, Reference frame selection, Video coding

Citation Format(s)

Low complexity encoder optimization for HEVC. / Wang, Shanshe; Luo, Falei; Ma, Siwei; Zhang, Xiang; Wang, Shiqi; Zhao, Debin; Gao, Wen.

In: Journal of Visual Communication and Image Representation, Vol. 35, 02.2016, p. 120-131.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal