摘要
基于拉格朗日插值定理,提出了一种误差曲面的拟合方法。该方法只在一维方向上进行插值,并且对于每个分数维像素误差,只使用已知的三个值进行计算,因此,计算复杂性非常低。基于这种方法,针对H.264视频压缩提出了一种快速的分数维运动估计快速算法,减少了搜索点数,提高了搜索效率。利用JM12.0平台对该算法进行了仿真,结果表明,该算法与全搜索算法相比较,在保证图像质量的前提下,具有减少运算量和复杂度的优点。
A new model of motion compesated error distribution function based on Lagragian interpolation theorem. Here the interpolation is selected in one direction, for each fractional-pel pixel, only three integer pixels are need for interpolation, highly reducing calculation complexity. And based on this model, a fast fractional-pel motion estimation algorithm is proposed, which reduces the searched pixels count and improves the searching efficiency. Experiments show that the efficient motion estimation algorithm proposed can reduce block matching distortion computations relative to full search algorithm with neglectable coding efficiency loss.
出处
《科学技术与工程》
2008年第14期3993-3995,4021,共4页
Science Technology and Engineering
基金
国家自然科学基金(60425413)资助
关键词
H.264
分数维运动估计
插值
H. 264 fractional-pel motion estimation interpolation
