상세정보
학술지
Efficient Biprediction Decision Scheme for Fast High Efficiency Video Coding Encoding
- 발행일
- 201611
- 출처
- Journal of Electronic Imaging, v.25 no.6, pp.1-8
- ISSN
- 1017-9909
- 출판사
- SPIE,IS&T
- 협약과제
- 16MR2100, 초고실감 미디어 서비스 실현을 위해 HEVC/3DA 대비 2배 압축을 제공하는 5세대 비디오/오디오 표준 핵심 기술 개발 및 표준화, 김휘용
- 초록
- An efficient biprediction decision scheme of high efficiency video coding (HEVC) is proposed for fast-encoding applications. For low-delay video applications, bidirectional prediction can be used to increase compression performance efficiently with previous reference frames. However, at the same time, the computational complexity of the HEVC encoder is significantly increased due to the additional biprediction search. Although a some research has attempted to reduce this complexity, whether the prediction is strongly related to both motion complexity and prediction modes in a coding unit has not yet been investigated. A method that avoids most compression-inefficient search points is proposed so that the computational complexity of the motion estimation process can be dramatically decreased. To determine if biprediction is critical, the proposed method exploits the stochastic correlation of the context of prediction units (PUs): the direction of a PU and the accuracy of a motion vector. Through experimental results, the proposed method showed that the time complexity of biprediction can be reduced to 30% on average, outperforming existing methods in view of encoding time, number of function calls, and memory access.
- KSP 제안 키워드
- Coding unit(CU), Compression performance, Computational complexity, Decision scheme, Encoding time, HEVC encoder, Low Delay, Memory Access, Motion Vector(MV), Motion estimation(ME), Prediction mode