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Old 06-03-2014, 06:21 AM   #1
Bueller Bueller is offline
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Default Digital Theater Projection & Blu-ray

One thing that's sort of foreign to me is the whole idea of film transfers, and it was never something I thought about until fairly recently. I've seen featurettes on Jaws & The Wizard of Oz that sort of show the process, but it got me thinking.

My local theaters are digital projection. With this, studios have to prep their releases for digital theaters. Basically what I'm wondering, is the transfer that ends up on a Blu-ray release this same transfer that was shown in digital theaters?
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Old 06-03-2014, 03:58 PM   #2
Kris Deering Kris Deering is offline
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Quote:
Originally Posted by Bueller View Post
One thing that's sort of foreign to me is the whole idea of film transfers, and it was never something I thought about until fairly recently. I've seen featurettes on Jaws & The Wizard of Oz that sort of show the process, but it got me thinking.

My local theaters are digital projection. With this, studios have to prep their releases for digital theaters. Basically what I'm wondering, is the transfer that ends up on a Blu-ray release this same transfer that was shown in digital theaters?
No. The resolution, color gamut and bit depth along with gamma are all different, as is the file type. DCI is typically 2048x1080 with the P3 (DCI) gamut (wider than REC709), and are encoded as a 2.6 gamma 4:4:4 at 12 bit?? (don't remember that one specifically). They are encoded as JPEG2000 files for compression vs our H264. File sizes are closer to 100GB on average.
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Old 06-04-2014, 02:43 AM   #3
ZoetMB ZoetMB is offline
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Quote:
Originally Posted by Kris Deering View Post
DCI is typically 2048x1080 with the P3 (DCI) gamut (wider than REC709), and are encoded as a 2.6 gamma 4:4:4 at 12 bit?? (don't remember that one specifically). They are encoded as JPEG2000 files for compression vs our H264. File sizes are closer to 100GB on average.
There are also 4K DCIs for theaters equipped with projectors like the Sony 4K projector. One of the first "films" to be presented in theaters in 4K (4096 x 2160) was the restoration of Taxi Driver a few years ago.

Later this year, we should begin seeing theaters using projectors driven by laser lamps. That should solve some of the brightness issues, especially for 3D movies.
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Old 06-04-2014, 05:33 PM   #4
Penton-Man Penton-Man is offline
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There are also 4K DCIs for theaters equipped with projectors like the Sony 4K projector. One of the first "films" to be presented in theaters in 4K (4096 x 2160) was the restoration of Taxi Driver a few years ago.
....
Even earlier than with T.D. in 2011 and to the local Cineplex….meaning not special presentations or exhibitions at a film festival, but rather, feature motion pictures that had widespread 4K digital cinema packages delivered. In 2010, Inception comes to mind.
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Old 06-22-2014, 07:48 PM   #5
slick1ru2 slick1ru2 is offline
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Found this interesting clip about the Irish theaters going digital, the first in Europe. But I wonder now if they are obsolete since they started back in 2002. Would that be a 2k system? Skip ahead to 40 sec.

http://www.youtube.com/watch?v=8PeI9...ature=youtu.be


Edit: a newer documentary on the transition to digital at theaters. It is too bad that movies arrive on a USB HDD (or downloaded) instead of some type of optical format that could be transitioned to consumers.


http://www.youtube.com/watch?v=_PsGg...ature=youtu.be

Last edited by slick1ru2; 06-22-2014 at 07:56 PM.
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Old 06-22-2014, 08:18 PM   #6
reanimator reanimator is offline
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Quote:
Originally Posted by Bueller View Post
...is the transfer that ends up on a Blu-ray release this same transfer that was shown in digital theaters?
As others have replied, no. However...

Your Blu-ray disc is mastered from the same elements that the movie theater file (DCP) is mastered from; the Blu-ray having about 94% of the same resolution as the DCP. Depending on the screen size, a properly mastered Blu-ray disc will compare very favorably to a DCP.

Many home theater aficionados own TVs and projectors that have better specs than commercial theater projectors (stronger contrast, better black levels, etc). People in this category can rightly claim that a Blu-ray disc looks better in their home theater than the DCP they saw at the local multiplex.
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Thanks given by:
Bueller (07-31-2014), MartinScorsesefan (03-01-2019)
Old 06-15-2018, 08:07 PM   #7
orangerunner orangerunner is offline
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Originally Posted by reanimator View Post
Many home theater aficionados own TVs and projectors that have better specs than commercial theater projectors (stronger contrast, better black levels, etc). People in this category can rightly claim that a Blu-ray disc looks better in their home theater than the DCP they saw at the local multiplex.
I just stumbled upon this four-year-old thread. My understand is that, yes, a Blu-ray is 94% of the resolution of a DCP (Digital Cinema Package) master but the DCP master is 12-bit with a maximum rate of 250 mbps whereas a Blu-ray is compressed with 8-bit and a maximum bitrate of about 37 mbps.

Watching a Blu-ray on a 65" TV might look "better" but all things considered that DCP version is being blown-up on a 40-foot screen and requires a much better master source.
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