[tech-3d] RE: Subject: shutter glasses / 3d video workstation

[Alan.Hancock@xxxxxx]

I did not mention shutter glasses in my previous post but I'm sure that you
all know about Cristoph Bungert's http://www.stereeo3d.com site where all
the mainstream shutter glasses are reviewed and dissected. The latest and
best shutter glasses system that can handle 4 methods of computer stereo
display is the i-Art Eye3D 4 in 1 Premium see
http://www.stereo3d.com/eye3dpremium.htm for a review. The Eye3D 4 in 1 can
be used with non windows operating systems because the stereo active part is
all done in the external controller box electronics without the use of
software drivers for the glasses interface. If you want a dual PC and TV
package there are several available but I would say that the best quality
stereo video is that which is displayed on a computer screen because of the
better refresh rate that can be used. Current commercial NTSC page-flipped
stereo video systems the playback is fixed to 30/2=15fps unless you use
specially modified video recorders and dual video projectors with polarising
filters, the 15fps is too close to the flicker perception threshold, it is
worse with PAL which is only 12.5fps. It is also possible to purchase a
VGA-level stereo demultiplexer which turns a single page-flipping signal
into two VGA-streams for feeding two polarized projectors or dual-input-HMDs
but this kind of equipment is very expensive. This brings use to the choice
of computer monitor and any good quality monitor capable of 120Hz at your
desired max. display resolution should be suitable. I would recommend
reading around the subject with what is available on the various Internet
sites that cover it including Michal Husak's work at 
http://staff.vscht.cz/~husakm/stereopcvideo.html .

Regarding the Matrox RT2000 there are other tried an tested PC
configurations DV capture and rendering documented at 
http://www.matrox.com/videoweb/support/rt2000/rec/rec.htm 
should you wish to use an Intel Pentium III system or an OEM system for
instance.

Have Fun
Alan Hancock

>       1. RE: Subject: shutter glasses / 3d video workstation
>            From: "Marcus Warrington" <marcusw@xxxxxxxxx>
> 
> ______________________________________________________________
> __________
> 
> Message: 1
>    Date: Wed, 13 Dec 2000 10:28:10 -0000
>    From: "Marcus Warrington" <marcusw@xxxxxxxxx>
> Subject: RE: Subject: shutter glasses / 3d video workstation
> 
> Hi Boris, Alan
> 
> I also have been "playing" around with Digital 3D video. I 
> use a Pinnacle
> DC10+ capture card (use MJPEG compression  and costs about 
> 160 uk pounds..
> probably about the same in dollars) on a Celeron 466 m/c with a 20gig
> 7200rpm
> Maxtor DiamondMax drive. I've made a 9 gig partition for 
> video capture and
> editing,
> although at around a gig for every 5-10 minutes its nowhere 
> near enough. One
> of the
> biggest problems with PC based video is the silly 2gig limit 
> on .avi file
> sizes, if
> you need more than this you need to do multiple captues (NT 
> increases this
> limit to
> 4 gig). Using a program like VirtualDub or AV_IO automates 
> this process by
> capturing to multiple .avi files as it needs to. Of course if 
> you use an
> expensive
> capture card that uses hardware compression in MPEG2 format 
> anyway then this
> files size issue won't effect you. Only problem is that MPEG 
> formats are
> notoriously
> difficult to edit as you don't have absolute control over 
> where you can cut
> (since you can only edit on an I frame, not a P or B)
> 
> I've edited (if needed) this captured Field-Sequential video 
> (from a Nuview)
> and
> then encoded it in Mpeg2 format (MPEG 1 is no good because it doesn't
> support
> field interlacing), burnt to a CD and then played back on my 
> standalone DVD
> player.
> Problem with sticking with interlace encoding is that it wont 
> play back in
> 3D on my
> PC (because the card/monitor don't have interlace modes).
> 
> Another thing is to convert the captured F-S video into 
> over/under format
> (using
> Premier plugin) and then playback using my Wicked3D glasses 
> (which have a
> line
> doubler) on the PC. This gives full screen, flicker free PC 
> display, but no
> good for
> TV. problem with this approach is that in order for it to 
> work (because of
> timing issues)
> Its very dependant upon the resolution used and the size of 
> the black band
> between
> top and bottom images.
> 
> There is also a purpose built 3D video player available at
> 
>
http://mysak.umbr.cas.cz/~husakm/Public/Win3dVideo/Win3dStereoscopicVideoPla
> yer.htm
>
> The same chap also has a very informative guide to making your own digital
> stereo-video
> movies in DVD quality for playing on computers at
> http://staff.vscht.cz/~husakm/stereopcvideo.html


-------------------------- eGroups Sponsor -------------------------~-~>
eLerts
It's Easy. It's Fun. Best of All, it's Free!
http://click.egroups.com/1/9699/1/_/520353/_/976725767/
---------------------------------------------------------------------_->