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andy roz (Wingtipvortex)
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Username: Wingtipvortex

Post Number: 3
Registered: 2-2007

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Posted on Monday, February 19, 2007 - 9:57 am:   Edit PostDelete PostView Post/Check IPPrint Post

Hi all, i have read many threads on this but i am still unsure on a few things, if anyone can clarify that would be great. I have a shutter system that i run through my dvd player not through pc as many of you do. I have a NEC vt45 and cannot get a clear 3d image(sometimes sort of but 98% of the time not at all) It says the vertical refresh is at 60.03 htz. I have tried many different settings to no avail, so im going to buy a different projector, namely the infocus LP 650 as it has been mentioned in here quite frequently, and aparently works with shutter. NOW..before i do, does it make any difference that im using shutter decoder/dvd player/projector, as oposed to pc ran shutter. Any help would be greatly apreciated.
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Michal Husak (Husakm)
Intermediate Member
Username: Husakm

Post Number: 67
Registered: 4-2006


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Posted on Tuesday, February 20, 2007 - 8:54 am:   Edit PostDelete PostView Post/Check IPPrint Post

What I can say ... With DVD decoder you can not go to higer frequency than 60 Hz ..
Our clients accepts 120 Hz as the total minimum to get a good non flickering image usualy ...
So advice forget the DVD decoder way and use PC ...
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Andrew Woods (Andrew_woods)
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Username: Andrew_woods

Post Number: 14
Registered: 4-2006

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Posted on Monday, April 16, 2007 - 6:18 am:   Edit PostDelete PostView Post/Check IPPrint Post

Most DLP projectors cause ghosting on field-sequential 3D video input via the composite or SVideo connectors. This is because the de-interlacing algorithm they use mixes alternate fields, and therefore mixes the left and right eye images.

One way of avoiding the 3D-unfriendly de-interlacer inside the projector is to use a DVD player which includes a 3D-friendly de-interlacer, and connect from the DVD player to the projector using component (Y,Pr,Pb) video cables.

There aren't many DVD players with a 3D-friendly deinterlacer - one is the Panasonic DVDS1: http://www.amazon.com/exec/obidos/ASIN/B000EOH1MM/3dmovies-20

Again, this assumes your projector is 3D compatible via the component progressive input - most projectors are but not all. There's a list of projectors tested for 3D compatibility here: www.3d.curtin.edu.au/3dmovies/projectors.html

But, as Michal says, this will flicker at 25Hz or 30Hz (depending upon your DVD). Using a PC will enable a faster refresh (assuming your projector can do a higher rate), but at the expense of some motion reproduction artefacts.
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andy roz (Wingtipvortex)
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Username: Wingtipvortex

Post Number: 6
Registered: 2-2007

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Posted on Thursday, May 17, 2007 - 1:01 am:   Edit PostDelete PostView Post/Check IPPrint Post

Thanks for the advice guys, i solved half my problems for now. I found a Sony 1251QH CRT,line doubler and a 150 inch high gain 16:9 screen and its improved my 3d experience fantasticly. I still have a flicker problem, but i can live with that for now. The guns on the crt all have 1200 hours on them plus a spare set came with it. All up it cost me 500 aus dollars for everything mentioned, does that sound like a good deal?

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