CurtPalme.com Home Theater Forum

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

Stool sample? Laughing

*edit* aargh too bad it got on a new page. Oh well.

Tom.W · Joined: 09 Mar 2006 Posts: 6635

I had to go to sears to get a couple new tires so I had 45 minutes to browse at a couple 3D models for the first time. I looked at a Sony and samsung with LED back lights. I liked the Sony best..

Being the first time I've seen 3D I was a bit surprised at how well it could work sometimes ! Shocked

It would be fun to see it on an 8ft screen ! Smile

ecrabb · Posted: Fri Oct 01, 2010 4:13 am Post subject:

I'll be interested to see what other people think, but after seeing a LOT of 3D setups at CEDIA, I'm pretty convinced that while 3D is pretty fun on a nice bright direct-view set like a LED-lit LCD, 3D on front projection just leaves me pretty disinterested. The brightness just isn't there to begin with, and putting the glasses on really kills both color and contrast. The picture just loses a whole bunch of its life.

If I look over the top of the glasses while I'm watching 3D, it makes me think, "Yeah, there's the picture I want to see!" (minus the double-image of course). Even with the giant Barco and DPI machines that were probably cranking out 20+fL, I just wasn't crazy about the picture compared to with the glasses off... Unfortunately, that means 3D on CRT will be even less interesting to me given how dim it is to begin with.

I don't mean to be a buzz-kill... I'll be continuing to watch this thread because I'm interested... I'm just not very optimistic.

SC

CIR Engineering · Posted: Fri Oct 01, 2010 12:58 pm Post subject:

virusc · Joined: 11 Apr 2007 Posts: 358 Location: Massachusetts

This might have been already asked but would it be possible to use 2 CRT projectors for 3d with one of those new 3D processors made to use duel projectors? What refresh do they work on, 60hz?

overclkr · Joined: 08 Mar 2006 Posts: 4227

stefuel · Posted: Sat Oct 02, 2010 1:15 pm Post subject:

I just saw 3-D for the first time at BB. Quite frankly was not that impressed. I would not be jumping through hoops to see it on a crt projector. I might be tempted to buy a pair of cheapo glasses and try it on a 3-D ready flat screen.
If you don't already have the equipment that will support it, I think you will be sorry you spent the extra cash to try it.

CIR Engineering · Posted: Sat Oct 02, 2010 8:00 pm Post subject:

CIR Engineering · Posted: Sat Oct 02, 2010 8:01 pm Post subject:

CIR Engineering · Posted: Sat Oct 02, 2010 8:06 pm Post subject:

CIR Engineering · Posted: Sat Oct 02, 2010 11:14 pm Post subject:

I just got off the phone with Jim Peterson of Lumagen. He wanted to discuss wiring options for the IR transmitter output on the Radiance processors to drive 3D glasses for CRT. It is starting to look like all existing Radiance processors will all support 3D shutter glasses outputs. Earlier, Lumagen though shutter glasses support was going to be for the XE and XD only, but Jim is considering adding support for the XS as well. When and if this is released, you will ship your processor back to Lumagen and they will add a plug (probably 3-pin mini-din VESA) for direct tie into 3D glasses that use TTL. This will support industry standard 3D IR transmitters.

There is a bigger demand for CRT 3D support than Lumagen initially expected. European and Asian dealers are all chiming in for 3D CRT support so this may push use closer to the top of the queue than I had hoped Smile

Initial CRT 3D release will probably support 3D bluray only and with a 96Hz 720p output to the projector. Later we can expect 120Hz 720p, support for side-by-side 3D input signals, support for frame stacked like Comcast and DTV (have you seen 3D football yet it is cool), 144Hz 720p for the PLUS models to avoid 3:2 pulldown, and even customizable output resolutions at 96Hz, 120Hz, and 144Hz.

craigr

stefuel · Posted: Sat Oct 02, 2010 11:17 pm Post subject:

CIR Engineering · Posted: Sun Oct 03, 2010 12:09 am Post subject:

CIR Engineering · Posted: Sun Oct 03, 2010 12:17 am Post subject:

Frank D · Joined: 20 Jun 2006 Posts: 73

Things appear to be moving well for CRT 3D.

Exiting stuff! Thumbs Up

mhalsan · Joined: 09 Nov 2007 Posts: 146 Location: Astoria, Oregon

Responding to virusc:

I've got a passive-polarized setup, and it works very well- once everything is set up. Matching two CRT projectors is very time-consuming!!!!

The gamer crowd has been doing this for at least several years with digitals (see mtbs3d.com and others). I tried Nvidia's 3DVision last February and found the ghosting and dim picture to be a disappointment.

I use polarizing filters and glasses from Berezin, Harkness' Spectral240 3D screen, and IZ3D's driver, the license for which they charge $50. Yes, that limits me to PC, however that really hasn't been a problem- probably 80% of my theater time is gaming anyway. Refresh rate is 60Hz. There is a selection of alternate-field DVDs available, and various 3D trailers; these work fine as-is, although the resolution of the alternate-field method is poor.

As for 3D Blu-Ray, IZ3D has promised compatibility in their next driver update (believe it when you see it). I'm also watching to see what Lumagen does; as mentioned above, they may support this method. Also, Doremi Labs has a 3D format converter that is HDMI 1.4 / frame-packing compatible. This converter is apparently available only to the professional market, although that obstacle can often be overcome. It uses HD-SDI for left and right outputs, so a pair of SDI to HDMI converters would be needed.

Thanks, Mark

CIR Engineering · Posted: Tue Oct 05, 2010 9:52 am Post subject:

mhalsan · Joined: 09 Nov 2007 Posts: 146 Location: Astoria, Oregon

Craigr- thanks for the compliment- I appreciate it! If you're going to be in NW Oregon let me know.

I'm still dissatisfied with light output, which is diminished by the polarizing filters and glasses. However, the ghosting problem is absolutely gone.

I'll be watching what Lumagen and IZ3D do on blu-ray support- and there's a chance neither will happen. In that unfortunate case- moving to digital w/shutterglasses would be the path forward. Speaking of which- the press releases for 3D Digital projectors have the comment that screen size will be limited to 100". What knucklehead made that decision? This is surely false.

Thanks, Mark

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

I guess the problem now is finding good quality glasses that is not expensive.

Ill probably never go the VP route as I tie in exclusively with a HTPC. Have you thought about a kit with ether glasses or glasses + sync thingie?

I am more and more happy that I am going to run a 1.5m wide screen. For an 8" Marquee I should still be able to get an OK picture.

BTW have you looked at the Teensy? http://www.pjrc.com/teensy/index.html
Might be hard doing any advanced sync circuit for cheaper. And you can use it for anything else.
If you want it might even be possible to tie it in with the computer to tap sync directly (or get eye order reliably)
It does support both USB and RS232.

CIR Engineering · Posted: Sun Oct 10, 2010 12:29 pm Post subject: