Motion estimation methods for overlapped block motion compensation
Motion estimation methods for overlapped block motion compensation
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DOI：
10.1109/83.862628
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发表时间：
2000-09-01
影响因子：
10.6
通讯作者：
Mersereau, RM
中科院分区：
文献类型：
--
作者：
Su, JK;Mersereau, RM
传统块运动补偿（BMC）的扩展，重叠块运动补偿（OBMC）已经被示出为减少运动补偿视频中的残留误差和块效应。然而，重叠产生块之间的非因果空间依赖性，并且使OBMC的运动估计（ME）复杂化。传统上，迭代方法已被用于重叠块运动估计（OBME）。对于压缩，保持的运动矢量（MVF）的速率也可能受到约束。这项工作考虑了几种速率约束的OBME算法，包括迭代和非迭代算法。实验表明，一个简单的光栅扫描算法是有效的次优，非迭代的解决方案，具有可比或更好的率失真性能和计算复杂度比迭代OBME算法。根据不同的应用，无论是这种方法或一个简单的块匹配算法加上迭代是最有吸引力的测试OBME计划。
An extension of conventional block motion compensation (BMC), overlapped block motion compensation (OBMC) has been shown to reduce residual errors and blocking effects in motion-compensated video. However, the overlap creates a non-causal spatial dependence between blocks and complicates motion estimation (ME) for OBMC, Iterative methods have traditionally been employed for overlapped block motion estimation (OBME), For compression, the rate for the motion vector held (MVF) may also be constrained. This work considers several rate-constrained OBME algorithms, both iterative and noniterative. Experiments demonstrate that a simple raster-scan algorithm is effective as a suboptimal, noniterative solution, with comparable or better rate-distortion performance and computational complexity than iterative OBME algorithms. Depending on the application, either this method or a simple block-matching algorithm plus iteration are the most attractive of the tested OBME schemes.