Wondering if this has any value really -- figure someone has tried something similar, doubling individual field height for processing then cut in half & refolding?

I stumbled across this playing with MMC 9.13. Long story short, if the height flag is doubled in an mpg2/m2v, the video plays as if anamorphic (still 4:3 but with doubled height). Using DGIndex -> avisynth to open in V/Dub (or opened directly in some other editing software), it's displayed at NTSC 720 x 960.

Using V/Dub's deinterlace-unfold fields option, 2 full frames are displayed. Processing & then halving height before folding seems like it might be giving a bit more quality. OTOH, don't think it's any more then using display methods to double height rather then a separate resize (double) of std height, and fps seems ~equal.

Thanks