基于H.264的改进十字搜索算法

Improved Cross Search Algorithm Based on H.264

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。

The paper proposes an improved cross search algorithm,considering the direction of moving vector.The algorithm designs a directional search pattern,and adopts a series of skills,which are composed of prediction of initial search point,half-stop criteria,search pattern and auxiliary search points to reduce search points.Extensive experiments conducted based on the H.264 encoding platform show that the improved algorithm can increase the searching-rate while keeping the similar PSNR.