Sharpen DV footage after upscale to HDV I have some DV footage that I'm using in an HDV sequence and have upscaled it to mach the resolution of the HDV footage (1080i), what's the best way to get rid of the resulting blurriness?

I'm using premiere pro.
Since you're scaling 2x or more, your best bet is to upscale the DV again using Avisynth with the nnedi rpow2 filter, then scale, if necessary, to HDV.

(With some tangible details, I can provide an example script.)

Trying to sharpen the upscaled videos will produce worse results than the above method.