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LCU-Level Rate Control for HEVC Considering Hierarchical Coding Structure

HEVC의 계층적 부호화 구조를 고려한 LCU 단위의 비트율 제어 기법

  • Park, Dong-Il (School of Electronics, Telecommunication & Computer Engineering, Korea Aerospace University) ;
  • Kim, Jae-Gon (School of Electronics, Telecommunication & Computer Engineering, Korea Aerospace University) ;
  • Lim, Sung-Chang (Realistic Media Research Team, ETRI) ;
  • Kim, Jong-Ho (Realistic Media Research Team, ETRI) ;
  • Kim, Hui-Yong (Realistic Media Research Team, ETRI)
  • 박동일 (한국항공대학교 항공전자 및 정보통신공학부) ;
  • 김재곤 (한국항공대학교 항공전자 및 정보통신공학부) ;
  • 임성창 (한국전자통신연구원 방통융합미디어연구부 실감미디어연구팀) ;
  • 김종호 (한국전자통신연구원 방통융합미디어연구부 실감미디어연구팀) ;
  • 김휘용 (한국전자통신연구원 방통융합미디어연구부 실감미디어연구팀)
  • Received : 2011.07.18
  • Accepted : 2011.08.22
  • Published : 2011.09.30

Abstract

In this paper, a method of rate control for constant bitrate (CBR) coding of High Efficiency Video Coding (HEVC) is addressed. The existing rate control of H.264/AVC may not provide exact rate control in the case of hierarchical coding structure since it doesn't consider the characteristics of the hierarchical coding structure. It is expected that a rate control is added to the reference software called HM for CBR encoding in the near future. More accurate rate control may be required in a hierarchical structure of random access (RA) mode defined in the common test condition of HM. In this paper, we propose a method of rate control based on quadratic Rate-Distortion (R-D) model considering temporal layers and frame types in hierarchical coding structure for efficient rate control. In the consideration of the trade-off relationship between the bit fluctuation and the average PSNR, both of frame and coding unit (CU) are set as the basic unit of rate control. The performance of the proposed rate control method is verified by simulations along with the trade-off relationships for the both cases of basic unit.

Acknowledgement

Grant : 무안경 다시점 3D 지원 UHDTV 방송 기술개발

Supported by : 방송통신위원회, 정보통신산업진흥원

References

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