online-shashki Forum Special Member
Join Date: Dec 2004
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You can only weave when both fields are taken from the same moment in time, which limits you to 30p native content, which simply isn't common. The only shows I can think of that are 30p are Survivor and the Victoria's Secret Fashion Show. Everything else (ignoring converted 50Hz sources) is either 24p with 2:3 pulldown applied to get it to 30i, or 30i native. Some new TVs can correctly reverse the 2:3 pulldown to restore 1080p24 video, but it's not universal in 2008 models, and it's not common in 2007 and earlier models.
As for 30i content, it must be deinterlaced, and weaving isn't going to cut it. Also, the result of the deinterlace needs to be 60fps, not 30. The entire point of interlacing is to allow for fluid motion capture at 60Hz without needing twice the room to do it, and if display devices are going to simply throw away half of that, there would be no reason to do it in the first place. Most progressive TVs simply bob interlaced content, though newer ones are starting to use algorithms involving motion compensation. For better or worse, you're still relying on the device to create content that wasn't present in the source.