视频转换编码中的压缩域运动补偿技术

Compressed Domain Motion Compensation Technology in Video Transcoding

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。

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.