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Blu-ray 3D Spec Finalized

Today the Blu-ray Disc Assn. approved specifications for delivering 3D content on Blu-ray discs.

We will see the first demonstrations of 3D on Blu-ray at the upcoming CES Convention in Las Vegas, January 7-10. We will be following developments in 3D technology closely, as it is of interest to everyone from video gamers, to HT enthusiasts, to teachers in the classroom.

Tomorrow, Friday, Dec 18, sees the release of the much anticipated Avatar, which is in 3D. If this movie is as successful as the pre-release hype, it should stimulate a great deal of interest in 3D for home theater.

We currently have four 3D-ready projectors in review. They are lower resolution XGA models designed primarily for classroom use. Watch for those reviews to hit in January.

For those looking for a review of the Da-lite High Power screen, we just posted it earlier today. This is another high gain screen, 2.8 gain in this case, which is terrific in the right environment, but not an ideal solution for conventional home theater.

We've also posted several reviews of pocket projectors this week. They are all posted and linked on the home page.

Thanks very much for your use of ProjectorCentral this year. All of us on staff wish you a very happy and safe holiday season.

Evan Powell

Comments (7) Post a Comment
Wyatt Posted Dec 18, 2009 10:55 AM PST
It would be wonderful to see a commentary on what the 3D movement would mean to us PJ buffs.

Would we need to buy new screens that would maintain polarization? Are the current lumen outputs enough to offset the dimming from 3D glasses? Is there a possibility of any of the major brands producing a 3D capable PJ for next season?

Thanks for the great year!
John B Posted Dec 20, 2009 8:29 PM PST
Am I worng but i always thought the 3D was based on the refresh rate of the device, not the screen?

I will be up for a new projectin the next 10-18 months and will be looking for a unit that has the ratified 3D specification for blu-ray in it. I'd really like to see the next model from Panasonic that would replace the relatively new AE4000 be D capable. that would be sweet.
Another Dad Posted Dec 23, 2009 12:29 PM PST
For a given duration of time, if half the images go to your right eye and half to your left eye, won't the apparent brightness be reduced? Image latency means it won't look half as bright, but it seems logical that some dimming will occur.
John Posted Dec 23, 2009 2:37 PM PST
@ John B You are only partially correct as far as 3D goes. There is passive and active 3D. Passive 3D uses a specific type of screen with special polarizers designed for 3D imagery. With Active 3D, you wear those goofy glasses and yes the refresh rate comes into play. I saw a JVC tv at CEDIA this year that I believe is a 60hz TV that was displaying 3D and it looked incredible. From what I gathered from talking with them is refresh rate is only part of it and you do not even need to go as much as 240hz for quality 3D when done correctly.
Wonder Posted Dec 25, 2009 5:47 AM PST
Is it possible to list the requirements for a projector/screen to deliver MVC encoded 3D contents on the blue-ray? Thanks.
AV Fan Posted Jan 3, 2010 7:14 PM PST
@John B

Actually, your brain does not use stereoscopic vision to determine brightness. As an example, looking at your computer screen, close one eye and look at it with the other. It will appear with the same brightness as when both eyes are viewing it. Your thinking isn't wrong such as when you pulsewidth modulate a light source, it appears 1/2 as bright because your eye is only receiving 1/2 the photons. Remember, the picture you see is pulsed as well. Simply speaking, with the polarized passive system your eyes are receiving roughly the same number of photons because the two seperate images are being shown on the same screen. The dimming you see is due to the elimination of non-polar photons.

With an active system, they 'blind' one eye to the image intended for the other. There is no reduction in apparent brightness because they simply pulse the images overall twice as fast. Since only one eye is required to determine brightness and because each eye is receiving the same average number of photons, what your brain perceives is a single 3d image of the same brightness. Hope this helps.
Roland Posted Jan 5, 2010 6:08 AM PST
Optoma Announces the 3D Ready HD66 Projector

Only 720p but for $699 not bad a deal.

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