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针对运动矢量的方向性,结合经典的快速算法,提出一种改进的十字搜索算法。设计具有方向性的搜索模板,并利用搜索起始点预测、中止准则、搜索模板、辅助点搜索等技术来减少搜索点数。在H.264实验平台的仿真结果表明,该算法在保持峰值信噪比不变的情况下,能有效提高搜索速度。
Aiming at the directivity of motion vector, combined with the classical fast algorithm, an improved cross search algorithm is proposed. Design a directional search template, and use search start point prediction, stop criteria, search templates, aided point search and other techniques to reduce the number of search points. The simulation results in H.264 experimental platform show that this algorithm can effectively improve the search speed while keeping the peak signal-noise ratio unchanged.