Efficient Mode Decision for HEVC Screen Content Coding by Content Analysis

Wei Kuang, Yui Lam Chan, Sik Ho Tsang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

The screen content coding (SCC) extension of High Efficiency Video Coding adopts three modes, the conventional intra mode of HEVC, the new intra block copy mode and palette mode, to improve the coding performance of screen content videos. However, the exhaustive search for the optimal mode among the three mode candidates brings significant computational burden to a SCC encoder. This paper proposes an efficient mode decision algorithm for SCC by content analysis. Since screen content videos contain both stationary coding units (CUs) and dynamic CUs, two different techniques are proposed. For dynamic regions, the high gradient pixels and the background color are jointly analyzed to perform CU type classification, and then different mode candidates are checked adaptively according to the CU type. For stationary CUs, the information from the collocated CUs is utilized to predict the optimal mode. Experimental results show that the proposed algorithm achieves 40.05% computational complexity reduction on average with 1.40% Bjontegaard delta bitrate loss under All Intra configuration.

Original languageEnglish
Title of host publication2019, 13th International Conference on Signal Processing and Communication Systems, ICSPCS 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728121949
DOIs
Publication statusPublished - 16 Dec 2019
Event13th International Conference on Signal Processing and Communication Systems, ICSPCS 2019 - Gold Coast, Australia
Duration: 16 Dec 201918 Dec 2019

Publication series

Name2019, 13th International Conference on Signal Processing and Communication Systems, ICSPCS 2019 - Proceedings

Conference

Conference13th International Conference on Signal Processing and Communication Systems, ICSPCS 2019
CountryAustralia
CityGold Coast
Period16/12/1918/12/19

Keywords

  • fast algorithm
  • High Efficiency Video Coding (HEVC)
  • mode decision
  • screen content coding (SCC)

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Instrumentation

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