움직임 벡터 정보 기반 HEVC 고속 부호화 유닛 결정 방법
- 주제(키워드) Multimedia , Video Coding , Image Signal Processing , CODEC , HEVC , DSP , ASIC , ASIP , FPGA
- 발행기관 아주대학교
- 지도교수 선우명훈
- 발행년도 2016
- 학위수여년월 2016. 2
- 학위명 석사
- 학과 및 전공 일반대학원 전자공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000021455
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
High Efficiency Video Coding (HEVC) employs the quadtree coding tree unit (CTU) structure to improve the coding efficiency. However, to achieve the coding efficiency, all possible block partition should be performed on the each depth level to obtain best combination of the coding unit (CU), prediction unit (PU), and transform unit (TU). To reduce the complexity of block partitioning process, this thesis proposed a fast CU decision algorithm that includes PU mode skip scheme with motion vector based Region of Interest CTU selection and depth level skip scheme based on the co-located block information in the previously coded frames. The RoI selection distinguishes between a dynamic region CTU and a static region CTU to decide whether perform the finer block partitioning or not. The depth level skip scheme performs depth averaging process and estimate the most probable target depth level. The experimental results show that the proposed fast CU decision algorithm can reduce the total encoding time up to 55%, with compared to the original HEVC HM reference software encoder. Moreover, the PSNR and BDBR loss of the proposed algorithm is negligible while gaining a substantial reduction in terms of the encoding time.
more목차
I. Introduction
II. HEVC Standard and Existing Algorithms
III. Proposed Fast CU Decision Algorithm
A. Method 1 : PU Mode Early Termination Based on Motion Vector
B. Method 2 : Depth Level Skip Scheme based Co-located CTUs
IV. Experimental Result
V. Conclusion
Bibliography
