Doom9's Forum - View Single Post - HD 1080i to DVD (all interlaced)

Blue_MiSfit · 1st July 2008, 01:41

there's a difference between "normal" (half rate) deinterlacing, and bob deinterlacing.

Bobbing preserves all temporal information, so 1080i bobbed becomes 1080p60. Then, you can scale these 60fps down to 720x480, separate it into fields, throw away half the info, and re-interlace down to 480i

You can do all this without deinterlacing, but smart bobbing first will give better results - namely less aliasing etc due to spatial alignment I think.

~MiSfit

1st July 2008, 01:41	#8 \| Link
Blue_MiSfit Derek Prestegard IRL Join Date: Nov 2003 Location: Los Angeles Posts: 5,989	there's a difference between "normal" (half rate) deinterlacing, and bob deinterlacing. Bobbing preserves all temporal information, so 1080i bobbed becomes 1080p60. Then, you can scale these 60fps down to 720x480, separate it into fields, throw away half the info, and re-interlace down to 480i You can do all this without deinterlacing, but smart bobbing first will give better results - namely less aliasing etc due to spatial alignment I think. ~MiSfit __________________ These are all my personal statements, not those of my employer :)