[XviD-devel] questions:chroma half pixel interpolate.

[邓雄书]

Dear xvid expert:
    when xvid to code p frame,it will first do one frame halfpel interpolate,why it only do luminance halfpel interpolate? and let chroma halfpel interpolate in motion estimate and motion compensate  block by block. why not treat chroma half interpolate as same luminance? It is only to save memory? I think treat chroma half interpolate as luminace are faster,can xvid expert tell me why?
Best regard
xiongshu deng