상세정보
학술지
Bit Allocation for Interframe Video Coding Systems
- 발행일
- 200208
- 출처
- ETRI Journal, v.24 no.4, pp.280-289
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 협약과제
- 02MR2900, MPEG-21 기반 방송 통신 융합 서비스 프레임워크 기술 개발, 김진웅
- 초록
- In this work, we present a novel approach to the bit allocation problem that aims to minimize overall distortion subject to a bit rate constraint The optimal solution can be found by the Lagrangian method with dynamic programming. However, the optimal bit allocation for block-based interframe coding is practically unattainable because of the interframe dependency of macroblocks caused by motion compensation. To reduce the computational burden while maintaining a result close to the optimum, i.e, near optimum, we propose an alternative method. First, we present a partitioned form of the bit allocation problem: a "frame-level problem" and "oneframe macroblock-level problems." We show that the solution to this new form is also the solution to the conventional bit allocation problem. Further, we propose a bit allocation algorithm using a "two-phase optimization technique" with an interframe dependency model and a rate-distortion model.
- KSP 제안 키워드
- Allocation algorithm, Alternative method, Bit Rate, Coding system, Frame-level, Lagrangian method, Motion Compensation(MoCo), Novel approach, Optimal Solution, Optimization techniques(OT), Rate constraint