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i have a hlp5674 samsung dlp. i know dlp chip in it supports up to 720p.

i know the set will display a 1080i image.

how can that be if it has a fixed pixel dlp chip?

i first thought it down scaled 1080i to 720p.

it really does seem to be in true 1080i

i have my xbox set up as a debug system and i have run a few tech demos on it.

the demos start from 480I up to 1080I and everything in between.

this link shows some screen captures i did
http://www.neo-geo.com/forums/showthread.php?t=122411


when i look at the images from my xbox on my tv the detail does increase.

some of the image gets really tiny yet you see more detail.

i have done some thing like this with my hd cable box.

at first i set it to 720p. thinking there is no point in wasting any time and making my tv have to rescale it back to 720p from 1080i.

but when i change it to 1080i the channels that broadcast 1080i seem to get even sharper and the little text on the screen will get smaller yet keep all the detail.

the fox and pbs logos are good examples of this.


so am i getting some form true 1080i?

if not how come the detail really does seem to increase?
 

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No, your set is not displaying 1080i. It is, and will forever be, 720p. Maybe a 1080i signal will look better via your internal scaling, maybe not. Go with whichever input methodology looks best to your eyes, but it is only 720p you are seeing.
 

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The 1080i is being scaled to 720p, obviously you can't display 1080 lines with only 720 rows of pixels. The improvement you see feeding the TV 1080i native signals just indicates that the TV scaler is better than the cable box scaler, which isn't very surprising.
 
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