[mythtv-users] OT: Why 1080p?

[Ed O'Brien]

>Do you realize that 1080i images are WORSE quality than 720p images?  
>(1080i should really be called 540p...)  So when you are watching 1080i  
>on a 720p screen is is being UPSCALED.  Not downscaled. 
 
>The order of HD video quality.  480p -->  1080i --> 720p --> 1080p

A 1080i tv show scaled to 1080p has more pixels on the screen than a 720p show.  Yes, with extremely fast motion, you have a possible argument, but not with a sitcom or a show displaying people that are moving at regular speed.

The 1080i = 540p and 720p > 540p argument doesn't hold true when you consider that 1080i has 1920 horizontal pixels.  You can't blinding look at the numberings with factoring that 1080i would be 540p at a 32:9 pixel ratio.  1080i resolution displayed on a 720p display has is horizontal resolution downscaled by 33%
 
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