【摘要】 研究视频转换编码中的压缩域运动补偿技术,对已有算法加以补充和完善,解决了现有算法不能处理运动矢量为负的问题。从具体实现角度,给出了详细的算法和必要的分析。实验结果表明基于该文所述的算法和分析改造的MPEG-2 TM5解码程序可以正确地实现压缩域运动补偿和空间分辨率下变换。更多还原

【Abstract】 This article studies the compressed domain motion compensation technology in video transcoding,complements and perfects existing algorithm,solves the problem in existing algorithm: can’t handle negative motion vectors,and gives out detailed algorithms and some necessary analysis from the realization point of view.The result of the experiment shows that MPEG-2 TM5 decoder reconstructed based on the algorithms and analysis this article gives out can realize compressed domain motion compensation and spatial definition downscaling correctly.更多还原