Originally Posted by Sisyphus
And you would probably be wrong. As nate358 as stated, once you are far enough from the screen, 720p and 1080p are indistinguishable for most people. See the below link for real world proof.http://www.avsforum.com/avs-vb/showthread.php?t=767929
Very good link and a very valid point to leverage some discussion.
One thing I noticed in that thread:
HD VIDEO: BenQ demo, Epson Demo, Shakira “Tortura” mtv video clip, Samsung Demo, (all at 1920Χ1080i)
HD FILM: Starship Troopers (1920Χ1080i)
SD FILM: SW III, Chronicles of ridick, Sin City, Alexander, Van Helsing (all 720X576)
Did anyone else notice that their HD content was only 1080 interlaced? In that case, not only are you losing vertical resolution because in 2006 you can bet that they deinterlacing for the 1080p output wasn't doing 3:2 pulldown reversal (probably just bob/weave), but the "live" shot 1080i demo material would have been vertically filtered during shooting to minimize aliasing.
I'd like to see the same demo with real, actual, native 1080p captures... like some high quality blu-ray disc material sent to the PJ in unprocessed 1920 x 1080 native. I can assure you that Ratatoullie looks noticably more detailed in 1080 than downresed to 720 on my older BenQ 8700. Perhaps if this AVS shootout had been performed with full-resolution 1920 x 1080 (progressive) material, the results would have been less ambiguous. NOTE: when they did the followup test a year later with HD DVD, they *still* used 1080i which very well could diminish the final resolution depending on the type of deinterlacing engine.
The HD-DVD was outputting 1920X1080i HD signal
... (a few posts later)
Exept the fact that we didn't have a 1080 p source at that time, 8720 does not accept 1080p input on hdmi !
For the record, it's never been contested that 720p and 1080i are "on par" with each other. The vertical filtering in 1080i tends to make it roughly the resolution equivalent of 720p, and in fast action 720p capture may actually be better.
Want proof that you can see the resolution limits of 1280 x 720? Here's a good way to take the issue of non-optimal source material out of the equation.
Pull up the CGI menu on your 720p projector. if it maps the menu graphics 1:1 with pixels on the screen (without applying some sort of blurring/anti-aliasing) you'll be able to do this.
So assuming you've got "icon style" graphics and text now up on your screen. Look at the "round" edges of the text. Can you see the stair-stepping of the pixel edge as the text tries to render a smooth curve? If you have normal vision and you have a good projector that can really throw those pixels on the screen (obviously having a filter or defocus to smooth pixels won't work here), you're demonstrating that your eyes can see the "noise floor" if you will of the 1280 x 720 matrix at that 1.5-1.78 distance. For me personally, by 2 screen widths the pixel-edges disappear on my 720p projector. But at 1.5 screen widths with a tight focus, I can see the stair-stepping of what is supposed to be a curve even where the graphics generator is using every available pixel to try to "map" the curve.
From the same distance, looking at 1:1 pixel text on my 1080 projector reveals much smoother curves.
If you don't have a menu system that can do this, just hook up your PC and map 1:1 to the resolution of your projector, and view the windows desktop and see if you can see the edges of the pixels in 720.
Again, if you have a 720 machine that's softening the picture by blurring pixel edges to make them less bothersome, that's not proof that 720p matches your human vision... just that your PJ design is not delivering the full image resolution to the screen. Also worth noting is that not all 1080p projectors can really deliver 1920 x 1080 resolution to the screen: chromatic aberation and inferior optics are one reason that many so called "1080p" projectors don't really show you actual 1080 resolution in practice. Similarly, the pixel-pixel interaction of LCOS also means that you many not get real full 1920 x 1080 resolution with some LCOS products.
Good single-chip DLP with high quality optics and no chromatic aberation should be able to deliver real 1920 x 1080 resolution. I'm also interested in Sony's new vw 85 that appears to not sacrifice sharpness unlike many of its SXRD predecessors.