[noggin]

Personally - I am that impressed with yadif quality, that I am not sure I might realize the new method on a every day basis, while really watching LiveTV.

Edit: Which "decent" video card do you use normally? That is better than Yadif?

I used to use a reasonably high-end ATI with Vector Adaptive de-interlacing under Windows (not using XBMC) which I was pretty happy with. Didn't compare it to YADIF at the time.

Not dissing YADIF - but people I trust about image quality in (or formerly in) BBC R&D (Richard Russell in particular who was one of the developers of probably the best PAL decoder in the world) are very complimentary about Weston 3-field (particularly because it is not adaptive and thus very consistent) The clever filter designs seem ingenious (suspect patents scared most people off), and the developer - Martin Weston - has worked on some of the highest quality broadcast standards conversion kit you can buy (from Snell). If they can achieve what they've achieved with PAL decoding (in comparison to a lot of the dreadful commercial PAL decoders) I trust their views.

The FFMBC Weston 3-field implementation was added to FFMBC (and I think then migrated to FFMPEG) as the BBC run lots of their broadcast kit using FFMBC (particularly their Raven video servers)

http://www.jim-easterbrook.me.uk/pal/
http://en.wikipedia.org/wiki/Richard_T._Russell