I think this can be usefull for Newbies to understand what people work here on

[CruNcher]

Here are some flash vids from the guys over @ HQV they show very nicely and narated what all for dificulties their are in Video Post Production :) and what alot of people here on Doom9, MSU Labs,HQV and other research companies/institutes are working on to improve those algorithms and find new ways to improve or develop unique new stuff :)
(be aware they do a little bit of advertising for their HQV Image Processor)

Interlacing (http://www.hqv.com/contentEngine/contentDocuments/HQVTechFlashNew8.swf?movieTimeDuration=172.06&flvFileName=/graphics/HQV/a_deinterlacing.flv)

cadence detection (IVTC) (http://www.hqv.com/contentEngine/contentDocuments/HQVTechFlashNew8.swf?movieTimeDuration=180.03&flvFileName=/graphics/HQV/a_cadence.flv)

Denoiseing (http://www.hqv.com/contentEngine/contentDocuments/HQVTechFlashNew8.swf?movieTimeDuration=140.43&flvFileName=/graphics/HQV/a_noise.flv)

Detail Enhancement (Sharpening) (http://www.hqv.com/contentEngine/contentDocuments/HQVTechFlashNew8.swf?movieTimeDuration=36.93&flvFileName=/graphics/HQV/a_detail_enhancement.flv)

Resizer (Upscaler) (http://www.hqv.com/contentEngine/contentDocuments/HQVTechFlashNew8.swf?movieTimeDuration=64.43&flvFileName=/graphics/HQV/a_1024_tap.flv)

All research in those areas can be primarily found in the Avisynth areas of the Forum :)