Originally Posted by specuvestor
Strictly speaking, Hz is the display/device frequency while fps is the source frame rate.
Yes, I was just trying to point out that at the same source fps, interlaced would have double the temporal resolution.
That made clear, doubling Hz by interlacing fps WILL induce artifacts. Think about it this way: if your logic works, why bother with complicated MCFI algo? Just interlace all the contents to achieve 120Hz or 48Hz whatever.
Yes, I know it won't be as good/accurate/as true resolution per motion sample (which is why I think we should have 1080p50/60 instead). But couldn't that be sort of how some consumer camcorders/cameras currently achieve high fps (eg. 200-1000 fps) for slow motion?
eg. recording 240 fps at 448x336 or 600 fps at 192x108
A bit like interlacing, but instead using different pixels in the sensor for different temporal samples, a bit like this:http://www.technomaly.com/2010/02/18...h-speed-video/
There are many arguments whether 1080i has higher or lower resolution than 720p. But one thing certain is that it is not close to 1080p motion resolution, especially in interlaced capture, even for static image.
I was talking mostly about motion quality - smoothness of motion - and we have no broadcast-to-home/Blu-ray 1080p50/60 sources yet, so interlaced is the better currently delivered format for motion smoothness/realism (or 720p50/60...).
Like you said newer films are going higher fps. Red One can go 2K 120fps progressive. I'm not sure how advance is general broadcast now but BBC Olympics should be broadcasting in progressive with their 1080p25 trial earlier this year.
The Olympics will also have some events shot at 7680x4320p60 which is a better format (not to consumers homes though).
The BBC is already broadcasting where they are broadcasting (in the UK anyway) in a sort of 1080p25 mode or 1080/50i depending on the GOP (I think it's all within 1080/50i because that's how some set top boxes identify it, but some parts must be flagged as 1080p25 somehow). Obviously when the GOP is 1080/50i that will be the one with twice as good motion quality (motion smoothness). And when it's jerky/stroby/unrealistic motion, that will be the 1080p25 mode. So having an added mode for unrealistic/jerky/stroby motion doesn't seem very advanced to me, especially if it could make mistakes or due to only being allowed to switch once per GOP, switch to that mode on content that is 50hz. You mention the Olympics - I doubt they would want the 1080p25 mode for the actual live events - it being half as good for motion quality/realism as the 50i mode.