MPEG-4隔行方式下P帧运动补偿与逐行方式之比较研究  

Comparison of Motion Compensation in the Mode of Interlacing and Progressive in MPEG-4

作　　者：费克玲[1] 李敬[1] 

机构地区：[1]四川大学电子信息学院,四川成都610064

出　　处：《现代电子技术》2005年第22期55-56,59,共3页Modern Electronics Technique

摘　　要：作为与逐行方式相对应的隔行方式在视频编码中仍有着相当多的应用,通过对隔行方式下xv id开源程序中P帧运动补偿问题的校正,阐述了M PEG-4 P帧运动补偿的一般过程。并对基于帧预测(fram e-pred icted)的帧间宏块(in terM B)运动矢量预测因子的求取进行了介绍,在此基础上,阐明了基于场预测(fie ld-pred icted)的帧间宏块上、下半场运动矢量预测因子的计算。给出了帧预测宏块、场预测宏块半象素插值的程序实现,进而对逐行与隔行方式下P帧运动补偿的实现做出较为全面的对比分析。In contrast with progressive mode, interlacing mode still has wide application in the area of video coding, by the correction of motion compensation of P-VOP in the interlaced mode of the open source code of xvid,this paper describes the general implementation of motion compensation in the P-VOP of MPEG-4. In addition,it introduces the computation of motion vector predictors of frame-predicted and field-predicted inter Macro Block ,and gives programming implementation of halfpel interpolation in the two kinds of MBs. Furthermore,it makes analysis about the comparison of motion compensation in the mode of interlacing and progressive in the P-VOP of MPEG-4.

关 键 词：运动补偿 隔行 逐行 帧预测 场预测 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]