View Full Version : Why in the world does the PSP have a 480 x 272 resolution screen?
480 x 270 with square pixels is a 16:9 aspect ratio.
480 x 272 with square pixels is not a 16:9 aspect ratio (it's actually 30:17, but that's beside the point).
So why did Sony choose a resolution that was really close to 16:9, but not actually 16:9?
270 is not divisible by eight, while 272 is? Perhaps it has something to do with the available number of line buffers, or whatever.
In any case, having 1 pixel of black bar on the top and bottom isn't a big deal when playing 16:9 content.
Probably some artifact of LCD panel production at the time of the original design.
Caring for exact display aspect rate = pointless.
resolution is multiple of 16 = win!!!
You could just as well ask why some 16:9 720p TV's are 1024x768 resolution. And some are 1366x768 (not exactly 16:9 either with square pixels. :P).
you can :
- scale from HD or SD to 480x272 and not care about 16:9 vs 15.9:9
- scale to 480x270 and not display two line of pixels and not care about them
probably doing the first is easier and not wasteful of 960 pixels.
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