H.264帧间预测快速算法

帧间预测是实时视频编解码技术的研究重点，高精度的匹配和补偿可以减少帧间预测误差，提高视频图像的压缩效果．为了降低在视频编码标准H．264中帧间预测的高计算复杂度问题，提出一种帧间预测快速算法．该算法在利用运动矢量的时空相关性对最优匹配点位置进行预测的基础上，依次进行“十”字形分布的五点搜索和九点均布的矩形搜索；并在搜索过程中引入根据最优点和次优点界定搜索方向、搜索窗口自适应伸缩和中途截止等多种优化策略，以提高整像素块匹配的搜索速度．实验结果表明，与全搜索算法相比，文中算法在不降低搜索精度的情况下，其运动估计速度约为全搜索算法的12倍；与UMHexagonS算法相比，在重建图像质量和码率接近的情况下，速度提高了1．87倍．

A Novel Fast Inter Prediction Algorithm in H.264/AVC

Investigation on inter prediction algorithms is an important research hotspot in the real-time video coding-decoding technology.In the regarded study,the prediction error can be reduced by incorporating high accuracy estimation and compensation,and the performance of compressed video can be improved.H.264 video coding standard can achieve considerably higher coding efficiency than previous standards.However,this comes at a cost in considerably increased complexity at the encoder and thus increases the diffi...