From: T Goodwin <asd@tim.u-net.com>
Subject: TECH: Stereoscopic display, VGA buffers, synchronisation
Date: 14 Mar 1996 19:10:23 GMT
Message-ID: <4i9quv$9ad@nuntius.u-net.net>
Organization: Mr. T. Goodwin


From: T Goodwin <asd@tim.u-net.com>

Stereoscopic Display

Abstract:-

Using LCD shutter glasses with a standard SVGA monitor, generate a
stereoscopic display with an increase in frame rate /quality for a
limited cost.

Ideas:-
To increase frame rate / quality without reduction in screen size. 

1. Utilise two graphics cards in one machine - one to generate left
image / the other the right image.

2. Utilise two identical PCs, synchronised with one generating the
left and the other the right image. Output from PCs to be toggled
and output to SVGA monitor / projection unit.

Of the two ideas, the latter is more viable due to the specialist
programming being required for the first.

Control:-
Use standard mouse/keyboard etc. with the cable spliced and connected to both 
PC's.

Synchronisation:-
The 2 graphics card outputs need to be synchronised so that when the sync 
return is sent the output is switched* to the other graphics card. Thus in 
effect generating field sequential stereo graphics. 
Two methods:-
1. Hardwire the clocks together (college wouldn't allow).
2. Use buffers as Time Base Correctors on the graphics card outputs.  

*Switching:-
Switching between the two graphics card outputs needs to be done whilst 
vertical blanking occurs.

Information Required:-
1. Other possible methods of synchronisation.
2. Using buffers (what type etc. (circuit diagrams etc. most welcome)) .
3. Switching methods. 

Thanks:-
To anyone who helps me, directly or indirectly.


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