Hash based fast local search for Intra Block Copy (IntraBC) mode in HEVC screen content coding

Sik Ho Tsang, Yui Lam Chan, Wan Chi Siu

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

25 Citations (Scopus)

Abstract

The Intra Block Copy (IntraBC) mode is a very efficient coding tool for the screen content coding (SCC) extension in High Efficiency Video Coding (HEVC) due to the frequently occurrences of repeating patterns and noiseless characteristics of screen content videos. There are local search and hash search for the IntraBC mode to increase coding efficiency. However, the IntraBC mode also brings along high computational complexity for SCC as exhaustive block matching is done within the same frame. Though there are already some constraints applied to IntraBC mode to reduce its complexity, it is still very high. To further reduce the complexity, we propose to speed up the local search by checking the hash values of both current block and block candidates. With our proposed methods, the encoding time is reduced by up to 25% and 23% for YUV and RGB sequences respectively while coding efficiency can still be maintained with only negligible bitrate increased.
Original languageEnglish
Title of host publication2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2015
PublisherIEEE
Pages396-400
Number of pages5
ISBN (Electronic)9789881476807
DOIs
Publication statusPublished - 19 Feb 2016
Event2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2015 - Hong Kong, Hong Kong
Duration: 16 Dec 201519 Dec 2015

Conference

Conference2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2015
Country/TerritoryHong Kong
CityHong Kong
Period16/12/1519/12/15

ASJC Scopus subject areas

  • Artificial Intelligence
  • Modelling and Simulation
  • Signal Processing

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