针对MVC系统中运算量最大的矢量预测部分——单向搜索和双向搜索,该文提出一种快速算法。根据多视点视频的序列相关性,采用立体-运动约束模型在运动域和视差域进行联合迭代单向搜索,设计可信度因子来自适应地调整修正搜索窗口,同步搜索得到运动和视差矢量。此外,通过分析双向预测宏块的特性,提出一种双向搜索提前中止算法。实验结果证明该文算法的有效性,能在保持编码质量的同时极大减少算法复杂度。
This paper proposes a fast algorithm particularly for the most computational complexity part in a Multiview Video Coding(MVC) system uni-directional and bi-directional predictions.Based on the stereo-motion consistency constraint,an iterative search strategy with adaptive refinement search range adjustment technique is proposed for uni-directional prediction,in which motion and disparity vectors can be achieved jointly.Furthermore,an efficient early termination is proposed for bi-directional prediction on the basis of the analysis of multiview video sequences.Experimental results demonstrate the effectiveness of the proposed fast algorithm.