基于二项式R-D模型的多视点视频码率控制算法  

An advanced rate control algorithm for multi-view video based on the quadratic R-D model

作　　者：严涛[1,2] 安平[1,3] 张兆杨[1,3] 沈礼权[1,3] 王贺[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072 [2]九江学院信息科学与技术学院,九江332005 [3]新型显示技术及应用集成教育部重点实验室,上海200072

出　　处：《高技术通讯》2010年第5期481-486,共6页Chinese High Technology Letters

基　　金：国家自然科学基金(60832003;60902085;60672052;60972137);上海市曙光计划(06SG43);自然科学基金(09ZR1412500);上海市教委重点项目(09ZZ90)资助项目

摘　　要：针对目前尚未深入研究多视点视频编码(MVC)码率控制的状况,在分析现有视频码率控制中率失真模型的不足和多视点视频编码的特点的基础上,提出了一种基于二次率失真(R-D)模型的多视点视频编码码率控制算法。该算法的核心是先根据视差预测和运动预测的结构关系,将所有图像分成6种类型的编码帧,并改进二项式率失真模型,然后根据已编码信息进行视点间、帧层、基本单元层比特分配与码率控制。实验仿真结果表明,与目前采用固定量化参数的JVT的MVC相比,该算法能够有效地控制多视点视频编码的码率,同时保持高效的编码效率。Seeing that the rate control for multi-view video coding is not well studied, this paper illustrates the drawbacks of current existing rate-distortion models for video rate control and the characteristis of multl-view video coding, and then proposes a rate control algorithm for multi-view video coding based on the quadratic rate-distortion model. The proposed algorithm classifies each picture into six frame types based on the relation between disparity prediction and temporal pre- diction estimation and also improves the quadratic rate-distortion model. The proposed method allocates the bits and controls the rate for inter-view, frame layer, and basic unit layer based on the analysis of the previously coded infonnation. The simulation results show that the proposed algorithm can effectively control the bit rate for multi-view video coding while keeping a high coding efficiency compared to the multi-view video coding with fixed quantization parameters.

关 键 词：多视点视频编码(MVC) 码率控制 比特分配 率失真模型 基本单元层 

分 类 号：TN919.81[电子电信—通信与信息系统]