I guess this is worthy to have its own thread. Following some other thread:

http://www.dvxuser.com/V6/showthread...post1986694138

Here's some food for thought:

http://www.bmcuser.com/showthread.ph...-of-resolution

And especially this one:

http://www.magiclantern.fm/forum/ind...6639#msg126639

That is:
http://avisynth.nl/index.php/Main_Page
http://avisynth.nl/index.php/Nnedi3#Filters

Finally, here's an interesting link with a fair explanation (see Graeme Nattress entry):
http://www.reduser.net/forum/showthr...s-it-Look-Good