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This topic comprises 9 pages: 1 2 3 4 5 6 7 8 9
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Topic: why is the "digital transition period" being handled so badly?
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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 10-13-2011 10:03 PM
Sam,
I fully intend to develop this into something that will show up in the "rags" and/or in the SMPTE Journal. The spare time thing is in VERY short supply right now, unfortunately. I also plan to introduce the information on the next round of SMPTE docs relating to illuminating screens (both for Film and DCinema). My data is grown, albeit slowly now. When I am taking the measurements, I'm using a USL PSA-200 meter and when possible, also taking a picture from the same perspective as the light meter...I'm also measuring the light when sitting off-axis. One would be AMAZED at how the light improves on the curved screen.
On to the Uptown...a subject I'm rather aquatinted with, in its film days. First off, unlike the Cinerama Dome (aka Arclight)...the Uptown's projection is almost straight on with a very slight upward projection angle. In 35mm, we had lenses for 1.85 and 70mm that mitigated the barrel distortion, for the most part...however, on the sides one would get a pincushion distortion. Scope, on the other hand, never had a curve corrected lens (though I did experiments with how to do it on a Deep Curve screen and it worked...it would cost a pretty penny though).
What one would likely see in DCinema is a barrel distorted image...the top and bottom horizontal lines would curve towards the center but the sides would be mostly straight (the image would be football shaped...in the American sense). A flaw in the plan is that Silver screen...the curvature would be too great and it is likely that the sides of the screen are brighter in the center (if one is seated in the center)...the upward projection angle would keep the lower seating area from being well lit but it would favor the balcony. The rather tallish screen would make the image seem like there was a band of light about half way up the screen that stretched from side to side but the corners would be very noticeably darker than the middle. If they are not using anamorphic lenses there, then they are wasting an large amount of light on Scope. The anamorphic lens would help, minimally, with the screen curvature too. Note, I have NOT seen the Uptown since it has gone digital but I do know the physics of what must occur and I also know its projection location.
As has been pointed out, the Digital Cinema industry has not developed deep-curve lenses and probably never will. There are not enough deep-curve theatres to justify it. The lenses that existed for film have their origins date back to when Cinerama, D-150 and the like. The T-Kiptikon series...but was kept alive and actually made it into the ISCO Ultra line with multi-coatings and such. The MagnaCom 65 was also a very good tool in a deep-curve situation as it will pincushion an image...DCinema does not have such tools.
Short sighted people also put a "no visible artifact" scaling rule in the DCI spec...while for typical flat screens with straight on projection, I absolutely agree. But what if you have some significant horizontal offset? Which looks worse and has more visible artifacts, a digitally keystone corrected image with credits and captions parallel to the bottom masking board or a badly keystoned image that is cropped? In the case of a deep curve screen, scaling the image to deal with the shape of the screen is preferable to cropping a bunch of pixels and having visible artifacts due to the screen shape. As projection resolution goes up, the becomes even more true.
-Steve
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Scott Norwood
Film God

Posts: 8146
From: Boston, MA. USA (1774.21 miles northeast of Dallas)
Registered: Jun 99
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posted 10-14-2011 06:44 AM
It appears that my original post here was widely misunderstood. The intention was not to start another film vs. big-screen-TV flamewar or to debate the aesthetic qualities of each. We have plenty of other threads in which to do that. My issue was with the potential failure of the existing business model for exhibitors and also with the ethics of distributors' making a change to their business which will have a significant impact on their customers (the exhibitors) without providing them with sufficient information to make informed decisions.
In particular, the last issue above has essentially turned the distributor-exhibitor relationship from a mutually beneficial one into a giant poker game. Assuming that the major distributors have every intention of eliminating 35mm film distribution for new titles in the forseeable future (and apologies to them if they do not), I believe that they have an ethical obligation to communicate these intentions to exhibitors. If they cannot set an actual cutoff date for 35mm, then they should make a statement to the effect of "we will guarantee print availability until June 6, 2015 and cannot guarantee availability after that date." I believe that the current policy of silence along with an implied threat to exhibitors is unfair to both parties and is unlikely to result in an outcome that is favorable to everyone.
I agree with those who state that distributors have the right to make money. I agree. They have a legal and ethical obligation to maximize shareholder value. I am not convinced that eliminating 35mm will do this for them, but that is neither here nor there. I do believe that they need to be more open about their intentions to their customers, and that doing so would be in both parties' interests. I also believe that, unless they really want to see a signficiant number of screens go dark if/when 35mm is eliminated, that they need to offer a more transparent and more universally applicable method of subsidizing the equipment costs for exhibitors. I am not convinced that the existing VPF plans do this, as the exhibitor still needs to find a way to increase revenue to support future upgrades. If this cannot be done, then the VPF policy (if it even applies to the theatre in question) has done nothing more than provide (say) ten years worth of life support to a dying business.
I can understand how, in certain situations, D-cinema can make economic sense, particularly in venues which can use the equipment for "alternative content" and/or in multiplexes where the ability to "interlock" or move "prints" among screens on very short notice is necessary. These venues should definitely install the equipment and go that route. My concern is with the majority of exhibitors where there is essentially zero benefit to making the conversion.
As for the manual/documentation issue: where I can I download Dolby or Christie installation manuals without having to register for a web site? This is annoying and should be unnecessary. Where can I get the root password for a particular server? It's not in the Dolby manual (admittedly, it is easy enough to figure out on their server, but that is not my point and should not be necessary). Why is it necessary to have a service technician to accomplish the "marriage" between server and projector? I can do my own 35mm equipment installation...why can't I do this with DLP? I would also argue that source code should be available for all of this equipment (I am not suggesting an open-source license...just that licensed users should have access to the source code), but that will never happen.
As for previous forced upgrades (sound and CinemaScope): these provided differences (and, arguably, improvements) to presentation quality that audiences noticed. D-cinema (with the exception of 3D, which can also be done with film) does not do this. One could argue that talking pictures resulted in a downgrade of film aesthetics for the following few years, but audiences preferred them to silents and bought tickets for them. As for 70mm and Todd-AO, no one was forced to install either, and the two Todd-AO films were photographed twice, specifically to accommodate 24fps/35mm distribution in venues which would not or could not accommodate 30fps/70mm. The only real parallel that I can see here (a forced upgrade that did not do anything noticeable to the average cinema patron) was the cyan-dye track conversion, which had plenty of lead time and communication between distribution and exhibition. It also required a relatively small cash outlay by the exhibitors.
I don't really have a solution here, but I do believe that someone needed to raise these issues while it can still be done. I do think that the push for D-cinema was premature and that it should have been delayed until widespread availability of 4K DLP equipment (which should have then become a mandatory minimum requirement...well, at least the 4K part, if not DLP). I also think that the specification needs work that should have been done before it was agreed to by the various parties. There are some things that DCI got very right, but many aspects of the specification are quite lacking or substandard. I also believe that film terms need to change. There needs to be a discount for D-cinema bookings (not an increase for 35mm) and that this needs to be continued in perpetuity to account for the higher equipment costs. Distributors need to re-consider exhibition as a loss-leader or at least a break-even deal that increases the value of their product in other markets. The whole VPF thing, with its insidious conditions, the typical requirement for an "integrator" (middleman), and nondisclosure clauses needs to be re-worked to be more equal to all exhibitors. And distributors need to make their intentions regarding exhibitor requirements clear, including forcing DCI compliance for D-cinema houses by refusing to provide content to non-DCI-compliant installations (after a suitable notification period to allow for upgrades).
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This topic comprises 9 pages: 1 2 3 4 5 6 7 8 9
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