DOI QR코드

DOI QR Code

Moment-based Fast CU Size Decision Algorithm for HEVC Intra Coding

HEVC 인트라 코딩을 위한 모멘트 기반 고속 CU크기 결정 방법

  • 김유선 (한밭대학교 정보통신전문대학원 멀티미디어공학과) ;
  • 이시웅 (한밭대학교 정보통신전문대학원 멀티미디어공학과)
  • Received : 2016.07.08
  • Accepted : 2016.09.01
  • Published : 2016.10.28

Abstract

The High Efficiency Video Coding (HEVC) standard provides superior coding efficiency by utilizing highly flexible block structure and more diverse coding modes. However, rate-distortion optimization (RDO) process for the decision of optimal block size and prediction mode requires excessive computational complexity. To alleviate the computation load, this paper proposes a new moment-based fast CU size decision algorithm for intra coding in HEVC. In the proposed method, moment values are computed in each CU block to estimate the texture complexity of the block from which the decision on an additional CU splitting procedure is performed. Unlike conventional methods which are mostly variance-based approaches, the proposed method incorporates the third-order moments of the CU block in the design of the fast CU size decision algorithm, which enables an elaborate classification of CU types and thus improves the RD-performance of the fast algorithm. Experimental results show that the proposed method saves 32% encoding time with 1.1% increase of BD-rate compared to HM-10.0, and 4.2% decrease of BD-rate compared to the conventional variance-based fast algorithm.

Keywords

Fast CU Size Decision;Texture Complexity;Moment;HEVC Intra CodingS

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