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基于亚像素运动矢量的AVS编码快速搜索算法 被引量:1

A Fast Search Algorithm for AVS Encoding Based on Sub-pixel Motion Vectors
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摘要 针对AVS视频编码系统中运动搜索模块运算量较大的问题,提出一种基于亚像素运动矢量的快速搜索算法。该算法利用整像素点进行分区域预测,并采用二步搜索法快速定位出最匹配亚像素点。实验结果表明,与传统方法相比.在峰值信噪比下降不足0.1dB的情况下,该算法减少超过50%的亚像素搜索次数,视频编码时间缩短18%~30%。 This paper presents a fast motion vector search algorithm based on sub-pixel motion vectors for AVS video encoding. In this proposed algorithm, the integer-pixel points are used to predict the region, and a two-step search algorithm is adopted to find out the best matching sub-pixel positions. The experimental results show that compared with traditional methods, this algorithm can reduce the search steps of sub-pixel more than 50%, and lessen encoding time by 18%-30% on condition that the change of PSNR is less than 0.1 dB.
出处 《电视技术》 北大核心 2011年第1期10-13,21,共5页 Video Engineering
基金 福建省自然科学基金重点项目(2007J0003) 福建省新世纪优秀人才支持计划项目(XSJRC2007-26)
关键词 AVS编码 亚像素运动矢量 运动搜索 区域预测 二步搜索 AVS encoding sub-pixel motion vector motion search regional predication two-step search
作者简介 黄敏琪(1986-),硕士生,主研智能化信息处理与控制; 何明华(1971-),教授,博士,主研嵌入式系统与系统级芯片设计; 文斌(1985-),硕士生,主研嵌入式系统。
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