Earticle

초록

영어

Fast mode decision algorithms in video intra coding are very useful and necessary for implementing practical real-time performance of the encoder. It can reduce the computational complexity by excluding impossible modes from candidate set. Anyway, most of these algorithms may give rise to the remarkable quality degradation, especially for the all intra coding scenario. In order to improve the encoding speed while avoiding the quality loss, this paper presents a new algorithm for fast CU size decision and mode decision in HEVC intra coding. First, the size of the coding unit is pre-determined according to judging the coding unit whether has the sub-block whose depth is 3 and analyzing the depth of the adjacent CU. Then a judgment by block-DCT coefficients is made on the texture direction of image block, determining candidate mode set based on the calculated direction and the best prediction mode of the adjacent block, which can reduce the number of candidate mode, thereby reducing the amount of computation to save coding time. The experimental results show that the algorithm provides about 34.6% reduction of intra coding time compared with the latest HM13.0 with negligible loss of PSNR and a little increase of bite-rate.

목차

Abstract
 1. Introduction
  1.1 Fast Coding Unit Size Decision
  1.2 Fast Intra Prediction Mode Decision
 2. Overview of Intra Prediction in HEVC
 3. The Proposed Fast Decision Algorithm
  3.1 Fast CU Size Decision Based on the Adjacent Code Block
  3.2 Fast Mode Decision Based on the Calculation of the Texture Angle
  3.3 Algorithm Description
 5. Conclusions
 References

키워드

저자

• Yong Gan [ School of Computer and Communication Engineering, Zhengzhou University of Light Industry, 450002, Zhengzhou, China ]
• Xiaorong Zhao [ School of Computer and Communication Engineering, Zhengzhou University of Light Industry, 450002, Zhengzhou, China ]
• Tianbao Li [ School of Computer and Communication Engineering, Zhengzhou University of Light Industry, 450002, Zhengzhou, China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Multimedia and Ubiquitous Engineering

• 간기

  월간

• pISSN

  1975-0080

• 수록기간

  2008~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605