帧速率上转换主要应用于不同帧速率视频扫描格式之间的转换、低比特率视频通信等领域。提出了一种新的自适应帧速率上转换算法，将基于先验知识的自适应可变尺寸块与双向运动估计相结合，并采用改进的逐级矢量场平滑算法和自适应运动补偿插帧方法，解决了帧速率上转换中存在重叠、空洞等问题，减少了块效应，并保证了较高的运算速度。对标准测试序列的实验结果表明，本文算法较传统方法不仅降低了计算量，而且内插图像的主观和客观质量均有所提高。

Frame rate up conversion is used in conversion between any two display formats, low bit rate video communication and many other fields. A novel adaptive frame rate up conversion algorithm is presented in this paper. The variable size block motion compensation based on pre knowledge is incorporated into bilateral motion estimation and the adapted multi stage motion vector processing and adaptive motion compensated interpolation are adopted so as to resolve the problems of overlapping, hole and block artifacts as well as guarantee higher computation speed. Experimental results show that the proposed algorithm provides better image quality than conventional methods both objectively and subjectively, and the computation efficiency is also improved.