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本文提出了一种运动自适应的帧内插算法,可以用于逐行扫描的数字视频系统中做帧速率转换。该算法首先采用了线性预测块匹配搜索算法来估计内插帧中每一个象素的运动矢量;然后对得到的运动场进行中值滤波和判别,剔除运动不一致或错误的运动矢量;最后沿着运动轨迹线性内插得到内插帧的象素值。仿真分析表明本文提出的算法,在一个大的搜索区域进行快速搜索和判别,可以有效地解决内插帧中快速运动目标的运动模糊和有切换帧时的图象重叠,提高了帧速率转换中内插帧的主观视觉质量。
In this paper, a motion adaptive frame interpolation algorithm is proposed, which can be used for frame rate conversion in the digital video system of progressive scanning. Firstly, the linear predictive block matching search algorithm is used to estimate the motion vector of each pixel in the interpolated frame. Then the median of the obtained motion field is filtered and discriminated, and the motion inconsistent or wrong motion vector is removed. Finally, the motion along the motion The linear interpolation of the trajectory results in the pixel value of the interpolated frame. Simulation results show that the algorithm proposed in this paper can quickly search and discriminate in a large search area, which can effectively solve the motion blur of fast moving objects in the interpolated frame and the image overlap in the case of switched frames, and improve the frame rate conversion Subjective visual quality of interpolated frames.