Dieter and James Richard Tyrer wrote:
Dan's writing is confusing. First he says that 200 Hz TVs
"have a genuine 200Hz frame-rate". Then later he says
" "200Hz" televisions are not the same as "200Hz" computer
monitors " and "we'll be seeing complaints from poor schmoes
who've spent all week trying to make 3D Vision work with their
new $US2000 "200Hz" LCD TV". As far as I can see, the
difference is that TVs include fancy image processing (and a
tuner). Surely you can turn off the image processing?
Or is there some other difference that would spoil shutter
glasses 3D?
I think that persistence might be an issue. With CRTs, TV sets have a
longer persistence phosphor than computer monitors because then need to
display 30 frames per second interlaced images. I do not know if that
is an issue with LCD sets, but if they are going to display 3D at even
24 frames per second, then they are going to need to have some control
over the persistence.
Yeah it's confusing. My understanding is that most of the
100, 120, or 200 Hz TV sets around are able to refresh at
that rate, but can't accept input that fast. They're all
designed to double/quadruple the incoming frames from DVD
or standard TV, which don't arrive faster than 60Hz or so.
(I also suspect that marketing weasels are counting the
even/odd interlacings differently, so these "200Hz" TVs
might just be what other people call "100Hz.")
Some/all have the option to turn off the image processing,
because it can create wierd visual effects, but that just
means each frame gets displayed a couple of times in
succession, like most cinema film projectors these days.
nVidia have a list of "3D-Vision-Ready" displays, which
are actually capable of handling an input signal at 120Hz.
I don't know what the situation is in America, but here
in Australia only the DepthQ projector from VR specialists
Lightspeed is actually shipping. ViewSonic wouldn't even
give me an expected availability date for their display
or projectors.
All very depressing for 3D stereo programmers who'd love
to get rid of their ten year old CRTs :-(
cheers,
Hugh Fisher
_______________________________________________
Open-graphics mailing list
[email protected]
http://lists.duskglow.com/mailman/listinfo/open-graphics
List service provided by Duskglow Consulting, LLC (www.duskglow.com)
