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» Film-Tech Forum ARCHIVE   » Operations   » Digital Cinema Forum   » Real D & Dolby 3-D - What is the difference? (Page 10)

 
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Author Topic: Real D & Dolby 3-D - What is the difference?
Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99


 - posted 04-05-2009 10:53 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
quote: Joe Redifer
Why would they change their name? Does DTS have a horrible reputation that they need to distance themselves from?

Nope, because the rights to the name expire in a few years time. I think they should call it Joe Digital Systems after that happens...

But alas Dolby also has the problem of scratched lenses as I experienced yesterday at Megaplex Theaters here in SLC. AND I was trapped in the middle of a packed row K on top of that. I guess I need to QC my own glasses before I walk to my seat but in this case I had the 50 gallon drum size popcporn and two four quart diets. Wife was handed the glasses. Betwix that and the dim scope picture I become a bigger and bigger fan of Master Image every day. See it and get a new pair of glasses every time!!

BTW: Wife's surgery was put off till the 20th because she caught a cold.

What happened to Julio???

Mark

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Mike Blakesley
Film God

Posts: 12767
From: Forsyth, Montana
Registered: Jun 99


 - posted 04-06-2009 01:13 AM      Profile for Mike Blakesley   Author's Homepage   Email Mike Blakesley   Send New Private Message       Edit/Delete Post 
quote:
DTS Digital Cinema announced today that it will begin operating under the trade name Datasat Digital Entertainment
So now they'll be known as DDE.

Well at least it's a name that the average illiterate person can pronounce on sight, unlike "Cinedigm."

Who thinks up these things?

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Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 04-06-2009 01:52 AM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
quote: Mark Gulbrandsen
I had the 50 gallon drum size popcporn and two four quart diets
Nice try with the diet sodas, but the popcorn still won that battle.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99


 - posted 04-08-2009 07:30 AM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
I was wondering if anyone would catch that 4 quart line...

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Sam D. Chavez
Film God

Posts: 2153
From: Martinez, CA USA
Registered: Aug 2003


 - posted 04-08-2009 10:39 AM      Profile for Sam D. Chavez   Author's Homepage     Send New Private Message       Edit/Delete Post 
Of course we caught the line, we would expect nothing less from you.

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Mark Gulbrandsen
Resident Trollmaster

Posts: 16657
From: Music City
Registered: Jun 99


 - posted 04-08-2009 08:56 PM      Profile for Mark Gulbrandsen   Email Mark Gulbrandsen   Send New Private Message       Edit/Delete Post 
I donno Sam... That must mean you've been spending alot of time or is that a lot of time on Film Tech???

Mark

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Sam D. Chavez
Film God

Posts: 2153
From: Martinez, CA USA
Registered: Aug 2003


 - posted 04-08-2009 11:02 PM      Profile for Sam D. Chavez   Author's Homepage     Send New Private Message       Edit/Delete Post 
Am I missing something? Is there another meaning besides the obvious, as in an inside joke?

I was pointing out that you are calling attention to yourself as in "look how clever I am and this will go over most people's heads".

I apologize if incorrect.

Maybe you are right, I have been spending too much time on the site. It's contagious.

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Mike Blakesley
Film God

Posts: 12767
From: Forsyth, Montana
Registered: Jun 99


 - posted 04-08-2009 11:21 PM      Profile for Mike Blakesley   Author's Homepage   Email Mike Blakesley   Send New Private Message       Edit/Delete Post 
Well I guess I am "most people" because I don't get what the hell you guys are talking about. Enlighten me, eh?

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Sam D. Chavez
Film God

Posts: 2153
From: Martinez, CA USA
Registered: Aug 2003


 - posted 04-09-2009 12:35 AM      Profile for Sam D. Chavez   Author's Homepage     Send New Private Message       Edit/Delete Post 
It was a non-sequitur to me as well why I was speculating and figured Mark would be along any time now.

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Jeremy Weigel
Phenomenal Film Handler

Posts: 1062
From: Edmond, OK, USA
Registered: Mar 2007


 - posted 04-13-2009 06:52 PM      Profile for Jeremy Weigel   Email Jeremy Weigel   Send New Private Message       Edit/Delete Post 
We're installing 2 Real-D systems at the end of the month. I pretty much gathered from prior posts (didn't read them all) that the Christie CP2000 ZX is an excellent machine. Our servers though, I didn't see any mention of in the few pages I read. They are GDC SA-2100A's. Has anyone here installed and/or used this server?

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Jim Cassedy
Phenomenal Film Handler

Posts: 1661
From: San Francisco, CA
Registered: Dec 2006


 - posted 04-14-2009 10:23 PM      Profile for Jim Cassedy   Email Jim Cassedy   Send New Private Message       Edit/Delete Post 
While resarching something totally unrelated to this topic,
I happened to come across this interesting 3D system patent
from 1922. It uses two projectors and a hand held ( ! ) device
with the shutters in each device synchronized by selsyn motors.

No polarizers. This device relied entirely on shutter
action to get the left & right images to the respective
eye-balls. I could not find any reference indicating that
this system was ever put into practial use.
(Especially when you consider that the viewing device
was hand held and must have weighed a couple of pounds)

If you look closely, you can see that there was a handy-dandy
hook on the back of each seat for hanging the viewing-shutter
device when not in use, or perhaps for when your arm got too
tired to hold it up in front of your face anymore.

The wiring diagram makes each seat look like an electric chair!

Fig 1: GENERAL DIAGRAM (Look: No Platters! & Real Carbon Arcs!!)
 -

Fig 2: HAND-HELD VIEWING DEVICE-
Looks like a Simplex shutter on a stick!
 -

Check out US Patent #1,506,524 for more info.
(and also check out some of the other interseting
devices cited in this patent application. )

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Hillary Charles
Jedi Master Film Handler

Posts: 748
From: York, PA, USA
Registered: Feb 2001


 - posted 04-15-2009 05:18 AM      Profile for Hillary Charles   Email Hillary Charles   Send New Private Message       Edit/Delete Post 
Jim, that system was used to show one feature, called "M.A.R.S"

The feature still exists in 2D form, and from the stills I've seen, it might have been rather trippy in 3D.

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 04-15-2009 06:51 AM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
Nah...it looks like a Master Image.

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Julio Roberto
Jedi Master Film Handler

Posts: 938
From: Madrid, Madrid, Spain
Registered: Oct 2008


 - posted 04-15-2009 07:47 AM      Profile for Julio Roberto     Send New Private Message       Edit/Delete Post 
Yeah, that system was used a couple of times. The theater had it mounted on a flexible arm so that audiences could position it to their liking and not have to hand-hold it [Smile]

It was short lived, of course. Mostly experimental.

Today the equivalent to that system is the XpanD shutter glasses. Same principle. It can be used with just one projector, there is no polarizing optics (in the projector) and the glasses act like an alternating shutter.

Because the glasses use liquid crystals to perform the shutter action, the glasses do polarize the light upon entry. But this is a by-product of the technology used, not a requirement.

The screen, of course, doesn't need to be silver or anything.

The glasses and projector synchonize the shutter action with a signal broadcasted into the auditorium (usually an infrared signal) instead of a wire. Such are the advances of modern technology [Big Grin]

At home, some ancient videogame system in the 80's used a similar concept to quickly rotate a color wheel in front of the eyes and provide a color-sequential system from the black and white display. On top of sequential color, it offered sequential 3D!!!

http://en.wikipedia.org/wiki/Vectrex
[link is to wikipedia article on the 80's home videogame system Vectrex, which used a rotating wheel peripheral to produce 3D and color effects]

quote:
The 3-D imager spins a disk which is half black and half colored bands that radiate from the centre (usually red, green and blue) between the viewer's eyes and the vectrex screen. The Vectrex is synchronized to the rotation of the disk (or vice versa) and draws vectors corresponding to a particular color and/or a particular eye. Therefore only one eye will see the vectrex screen and its associated images (or color) at any one time while the other will see nothing.

A single object that does not lie on the plane of the monitor (i.e., in front of or into the monitor) is drawn at least twice to provide information for each eye. The distance between the duplicate images and whether the right eye image or the left eye image is drawn first will determine where the object will appear to "be" in 3-D space. The 3-D illusion is also enhanced by adjusting the brightness of the object (dimming objects in the background). Spinning the disk at a high enough speed will fool the viewer's eyes/brain into thinking that the multiple images it is seeing are two different views of the same object. This creates the impression of 3-D and color.

As you can see from that 1922 patent, and other prior ones, human kind has been researching and developing 3D imaging solutions for over 100 years now. It was actually in 1922 when the first feature motion picture was made (Power of love).

As you know, the first 3D footage was shot about a week after the first camera itself was invented [Wink]

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Dennis Benjamin
Phenomenal Film Handler

Posts: 1445
From: Denton, MD
Registered: Feb 2002


 - posted 04-16-2009 07:23 PM      Profile for Dennis Benjamin   Author's Homepage   Email Dennis Benjamin   Send New Private Message       Edit/Delete Post 
In regards to this discussion on the 3-D systems:

I have now seen "Monsters vs. Aliens" in 3-D at two different theatre locations. First, at the Bowtie Annapolis Mall in auditorium #10 and yesterday at the Regal People's Plaza Theatre in Newark, Delaware in Theatre #14.

The "Tru-3D" at People's Plaza blew away what I saw at the Bowtie in Annapolis. This got me to wondering what the hell the difference was between the two systems.

Both Theatres needed to focus their Xenon Bulbs better, but the light output was the same (seemed a bit dim). Both had silver screens.

Regal People's Plaza:
A 3 year old NEC projector

Bowtie Annapolis Mall:
Master Image Wheel (brand new?)
Christie Lamphouse

Why would I get such a dramatic difference in my experience?

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