View Full Version : 4K viewing distances
david farland
03-04-2007, 09:46 PM
Saw this spreadsheet (http://www.carltonbale.com/home-theater/home-theater-calculator/) from Carlton Bale for working out 4K min/max viewing distances.
Plug in resolution, screen size & projector lumens and it tells you where to sit in a room to view 4K resolution properly...or any lower rez for that matter!
This sheet tells me stuff like for a Sony 4K (5000 lumens) (http://www.abelcine.com/store/product.php?productid=1000059&cat=777&page=1) projector (list price $66K) on a 20ft screen,
I should be viewing it between 3.8m-11.5m, (ideal = 4.6)...this will be marked with yellow gaffer tape on floor at NAB!
Also tells me a Sony 4K (10,000 lumens) (http://www.abelcine.com/store/product.php?productid=1000058&cat=777&page=1) projector (list price $98K) makes no difference to viewing distances on a 20ft screen in a dark room,
but will be required for 40ft screen as I need to get closer than the typical human FOV (140 degree) to resolve image properly from a 5000 lumen projector.
Carlton seems like he knows his stuff and I'm not about to dig up any THX/SMPTE ready recknors to prove him otherwise!
Sony rep told me you need 4 x Dual link HD-SDI cards (http://www.abelcine.com/store/product.php?productid=1000067)to drive the Sony projector at 4K and they were doing some future deal with NVIDIA in this area.
I'm assuming you need something like 1 (or 2?) of these (http://store.nvidia.com/servlet/SecureControllerServlet?Action=DisplayPage&Locale=en_US&id=ProductDetailsPage&SiteID=nvidia&productID=49538900&Env=BASE) NVIDIA cards with a couple of extra cards to drive the 4K Sony.
Now I'm assuming those Sony zoom (http://www.abelcine.com/store/product.php?productid=1000061#tabs) lenses are for long narrow room but don't effect the calculations, I hope!
Cheers,
DF
Jarred Land
03-04-2007, 10:00 PM
The Sony projector actually can take multiple inputs... HD-SDI is just one of them, We have used both HD-SDI and DVI inputs at Red.
The Nvidia Quadroplex, which Deanan has also been playing with inhouse, can export both via HD-SDI or DVI, DVI being of course the standard.
You need 4 cards each..
Jeff Kilgroe
03-04-2007, 10:06 PM
4 cards for DVI too? So the Sony projector doesn't accept DVI-DL / TMDS input? Bummer... Not that I was going to run out and buy a 4K projector anytime soon, but kinda surprising.
Jarred Land
03-04-2007, 10:09 PM
remember.. 4k isnt 2x2k's :) its 4x2ks :)
Jarred Land
03-04-2007, 10:15 PM
4 cards for DVI too? So the Sony projector doesn't accept DVI-DL / TMDS input? Bummer... Not that I was going to run out and buy a 4K projector anytime soon, but kinda surprising.
I cant remember the exact reason why, Deanan will know though.
Alexander Nikishin
03-04-2007, 10:19 PM
Jarred, any idea how large the booth's screen will be?
Jeff Kilgroe
03-04-2007, 10:20 PM
Yep, I realize that. I was just thinking that since a dual-link DVI interface can drive a 2K display at 12bpc and there's two of those on each of those Quadro cards... Should just require two cards. But if the projector doesn't accept dual-link DVI and only accepts standard DVI-D single-link, then it would in fact take 4 cards. :D
up to 40 feet per the 40'x50' NAB booth size :) or maybe they will just project it onto a 8.5inx11in piece of paper... it would probably ignite from the heat
Alexander Nikishin
03-04-2007, 10:35 PM
up to 40 feet per the 40'x50' NAB booth size :)
If you check out the floor plans and placement of the Red booth, you can't help but to think how cool it would be to rig up a projector screen on the building's wall and shoot that image straight out the booth for everyone in the building to see! :help:
Alexander Nikishin
03-04-2007, 10:43 PM
I'm still yearning to see Red projected on something larger than the Nuart's 35ft. screen. I'm sure it will hold up well, but I'm still dying to see it for myself.
Rob Lohman
03-05-2007, 01:21 AM
Last year the first screening at IBC was on a 60-foot (or thereabouts) screen if I remember correctly. It was HUGE!
Perhaps we'll do that again for IBC this year (easier to do there since they have the auditorium setup as a digital cinema every year with various 2K & 4K projectors and that huge screen).
Alexander Nikishin
03-05-2007, 01:38 AM
Last year the first screening at IBC was on a 60-foot (or thereabouts) screen if I remember correctly. It was HUGE!
Why oh why couldn't I have been there. :mellow:
Brainstorm
03-05-2007, 03:34 PM
Mar 5, 3:48 AM EST
Movie Firms Working on Digital Film System
By JOHN ROGERS
Associated Press Writer
Technology Video
Buy AP Photo Reprints
LOS ANGELES (AP) -- Tired of being turned away at the theater box office when a movie's sold out? Unhappy there's no art-house theater in your neighborhood to cater to your hoity-toity theatrical tastes?
Those days could be ending, say representatives of Universal Pictures, Warner Bros. Entertainment and a company called Digital Cinema Implementation Partners.
The three are working on a new digital film delivery system that, if successful, could give theater operators the flexibility to put a popular movie on an extra screen as quickly as the demand for it arises. At the same time, theater operators could boot out a surprise stinker and even book in for a day or two an art-house film with a small but devoted audience.
"Our goal really is to have the easiest, fastest, most reliable, most cost-effective content delivery technique possible to the theaters we represent," said Travis Reid, Chief Executive of Digital Cinema Implementation Partners, which is working with Warner Bros. and Universal.
The process, still in the early stages of development, would use satellite and broadband delivery systems to beam digital films directly to theaters, rather than have them copied onto hard drives and delivered by hand, as for the most part they are now, said Darcy Antonellis, Warner Bros.' executive vice president for distribution and technology.
That kind of rapid delivery, Reid said, would allow theater operators the flexibility to economically market niche films that could be shown for just a day or two to a targeted audience. It would also allow operators to quickly find more screens for surprise hits.
"We believe that if we can make that a very efficient process, very fast, they'll be able to respond to audience demands more," he said.
Beaming an encrypted version of a digital film directly to the theater should also cut down on film piracy and bootlegging, Antonellis said, by eliminating the number of opportunities for people to get their hands on the movie as it is transit.
DCIP is owned equally by the Regal, AMC and Cinemark theater chains, which have 14,000 screens in North America. The new system would be available to those and other interested theater operators, Reid and Antonellis said. About 2,200 U.S. theater screens currently show digital films.
Officials with the venture wouldn't offer a date by which they hope to have the system in place or give a cost estimate.
"I think the latter part of this year we'll likely be doing some testing," said Antonellis. "Our hope is as things progress and ... as the projectors roll out there will be a lot more activity."
Sam Druckerman
03-05-2007, 04:26 PM
Mar 5, 3:48 AM EST
Movie Firms Working on Digital Film System
By JOHN ROGERS
Associated Press Writer
Technology Video
Buy AP Photo Reprints
LOS ANGELES (AP) -- Tired of being turned away at the theater box office when a movie's sold out? Unhappy there's no art-house theater in your neighborhood to cater to your hoity-toity theatrical tastes?
Those days could be ending, say representatives of Universal Pictures, Warner Bros. Entertainment and a company called Digital Cinema Implementation Partners.
The three are working on a new digital film delivery system that, if successful, could give theater operators the flexibility to put a popular movie on an extra screen as quickly as the demand for it arises. At the same time, theater operators could boot out a surprise stinker and even book in for a day or two an art-house film with a small but devoted audience.
"Our goal really is to have the easiest, fastest, most reliable, most cost-effective content delivery technique possible to the theaters we represent," said Travis Reid, Chief Executive of Digital Cinema Implementation Partners, which is working with Warner Bros. and Universal.
The process, still in the early stages of development, would use satellite and broadband delivery systems to beam digital films directly to theaters, rather than have them copied onto hard drives and delivered by hand, as for the most part they are now, said Darcy Antonellis, Warner Bros.' executive vice president for distribution and technology.
That kind of rapid delivery, Reid said, would allow theater operators the flexibility to economically market niche films that could be shown for just a day or two to a targeted audience. It would also allow operators to quickly find more screens for surprise hits.
"We believe that if we can make that a very efficient process, very fast, they'll be able to respond to audience demands more," he said.
Beaming an encrypted version of a digital film directly to the theater should also cut down on film piracy and bootlegging, Antonellis said, by eliminating the number of opportunities for people to get their hands on the movie as it is transit.
DCIP is owned equally by the Regal, AMC and Cinemark theater chains, which have 14,000 screens in North America. The new system would be available to those and other interested theater operators, Reid and Antonellis said. About 2,200 U.S. theater screens currently show digital films.
Officials with the venture wouldn't offer a date by which they hope to have the system in place or give a cost estimate.
"I think the latter part of this year we'll likely be doing some testing," said Antonellis. "Our hope is as things progress and ... as the projectors roll out there will be a lot more activity."
This is great.
I knew it was coming....
But this makes me feel like it's a little closer than I thought.
Well, here's hoping it comes sooner than latter.