H.264/AVC中基于全零块检测的运动估计快速算法  

A fast algorithm of motion estimation based on all-zero block detection in H.264/AVC

作　　者：王嵩[1,2] 刘济林[1] 薛全[1] 陈国斌[1] 

机构地区：[1]浙江大学信息与电子工程学系 [2]国际关系学院杭州校区,浙江杭州310015

出　　处：《电路与系统学报》2005年第1期10-14,共5页Journal of Circuits and Systems

摘　　要：全零块检测是面向低比特率的视频编码器常用优化方法之一。特别是与运动估计相结合,可以有效的减少编码器的计算复杂性。本文根据H.264/AVC中整数变换的特点,给出了相应的全零块检测门限,提出了一种基于全零块检测的运动搜索提前中止准则。针对H.264/AVC多编码模式的特点,进一步将全零块检测用于H.264/AVC中多种编码模式的选择,有效的提高了运动估计的效率。利用这种方法,在有效减少编码器的计算复杂性,提高H.264/AVC软件编码器编码效率的同时,可以保持比特率和图像质量基本不变。All-zero block detection is one of the common optimization methods oriented towards low bitrate video coding. Especially when combined with motion estimation, it will effectively reduce the computing complexity of encoder. This paper, according to the characteristics of H.264/AVC integer transform, presents the corresponding all-zero detection threshold and an advance stop principle of motion search based on all-zero detection. In accordance with the features of multiple encoding modes, all-zero detection is applied to the H.264/AVC encoding mode selection, and further improve the efficiency of motion estimation. In short, this method will reduce the computing complexity of encoder and improve the encoding efficiency of H.264/AVC software encoder while remaining bitraste and video quality almost unchanged.

关 键 词：视频编码 H.264/AVC 全零块检测 整数变换 运动估计 

分 类 号：TN919.81[电子电信—通信与信息系统]