MPEG-2大范围运动估计的硬件实现

Hardware implementation for MPEG2 large range motion estimation

提出了一个用分层块匹配搜索方法解决用少量小范围运动估计（ＭＥ）ＡＳＩＣ芯片实时实现大范围ＭＥ的算法。详细说明了所提出方法的基本思想、硬件系统结构、设计要点。在设计时采用了两层结构，顶层的亚抽样率为４∶１，只需用６片ＳＴＩ３２２０即可实现Ｐ帧运动估计范围为（－１２８～＋１２４）水平，（－６４～＋５６）垂直。其研究成果可直接用于ＭＰＥＧ－２ＭＰ＠ＭＬ视频编码器及ＨＤＴＶ视频编码器的设计与实时实现。

An algorithm adopting smallrange motion estimation ASIC chips to realize largerange motion estimation in real time is proposed.The basic idea,system structure of hardware and design points of the proposed method are described in detail.Twolayer structure is adopted for the design.The subsampling rate at the top layer is 4 to 1.Six STI 3220 chips can be sued to realize P frame motion estimation.The range is-128～+124 for horizontal and -64～+56 for vertical.The study result can be directly used for the design and realization in real time of MPEG2 MP@ML video encoder and HDTV video encoder.