电子学报2009，Vol.37Issue(11)：2541-2545,5.
基于H.264视频编码的运动估计算法优化
Optimization on Motion Estimation Algorithm Based on H.264
摘要
Abstract
Motion estimation (ME) is vital to video compression. Due to the adoption of the high precision of motion vector (MV) in H.264 encoder, me computational cost increases rapidly, and ME takes almost 80% encoding time. In this paper, based on the UMHexagonS algorithm,an optimized algorithm is proposed based on the dynamic search range selection,big hexagon and small hexagon search mode respectively, which saves ME time effectively without quality loss. Experimenting with some typical video sequences proves that,compared to UMHexagonS algorithm,our optimized algorithm can save about 18.292% ME time and reduce the complexity of original scheme as well as enhance the real-time performance of the encoder but almost has no change in the reconstructed picture quality and bitrate.关键词
运动估计/动态搜索窗口/UMHexagonS/H.264Key words
motion estimation/ dynamic search range/ UMHexagonS /H. 264分类
信息技术与安全科学引用本文复制引用
吴晓军,白世军,卢文涛..基于H.264视频编码的运动估计算法优化[J].电子学报,2009,37(11):2541-2545,5.基金项目
国家自然科学基金(No.50805001) （No.50805001）
深圳市科技科计划项目(No.JC200903120184A,No.ZYC200903230062A) （No.JC200903120184A,No.ZYC200903230062A）
