I know very little about the PureHD Upscaler. It is a registered trademark, by either Intervideo or Ulead. Simply it upscales your SD (Standard Definition) video to work with HD video projects. If I were to take a wild guess, it just allows backward compatibilty, so that you can use videos that are SD with any HD...
Now that explaination was about as clear as fog wasn't it???
Ron P.
