UK to Build Network of 150 Digital Cinemas 200
mikael writes "According to this article at the BBC, a network of 250 digital screens in 150 cinemas across the country is being planned. Each film is losslessly compressed from 1 Terabyte down to 100 Gigabytes and encrypted onto a portable hard disk drive with a key unique to each cinema, which is then delivered to the cinema. Each cinema projector will be capable of showing films at resolutions of 2048 x 1080 pixels. "The key benefit is the distribution and screening of documentaries, British and foreign language films, as making a digital copy is considerably cheaper than spending over £1500 pounds to make a copy of a single film". Other benefits include better picture quality and the ability to show more films each day." The UK Film Council has a brief overview of the project as well.
Now how long (Score:4, Funny)
Re:Now how long (Score:5, Interesting)
So... what do you do, as a theater owner, knowing that your ass is personally on the line if pirate copies of your copy of the movie appear?
If it were my theater, I'd have the only key to the server room, which would be the only place that the hard drive would do any good.
Since the data has to flow from the server room to the projector when the movie is being shown, I'd enforce access logs on the server, so I could tell if the file had been read at times other than showtime.
But that still doesn't stop the $8/hour projectionist from installing a device that intercepts the data, copies it, and then passes it along to the projector.
Are there such things as video projectors that accept an encrypted stream of data?
Re:Now how long (Score:2, Interesting)
Regards,
Steve
Re:Now how long (Score:3, Insightful)
The more I think about this, the less I would want to be a theater owner with one of these machines. To much opportunity to get sued into oblivion.
Re:Now how long (Score:2)
You jest surely. There are cases where a projectionist has had someone come up to them in a new car and offer to hand over the keys in exchange for a loan of a print. The only way to pirate a film that has not been released on DVD is to borrow a print. Screener copies may be the source of bit-torre
Re:Now how long (Score:3, Interesting)
Assuming both are digital copies, then a frame by frame comparison should point out any watermarks.
Not necessarily!
Assume the pixels of the movie come in a stream M. Now assume you have a pseudorandom sequence P1 that tells you which pixels to add your watermark data to. That gives you a pixel stream M' which is mostly zeros except for the watermark. You distribute M + M' = M1 to the first theatre.
Now do the same with another copy of the movie, with a different pseudorandom sequence P2. This sequenc
Re: encrypted stream (Score:5, Informative)
Yes, which is what these systems will be using. Fraunhofer-gessellschaft (of MP3 encoder fame) is the technology behind these projectors. The stream is encrypted the entire length of the data path until it hits the electronics driving the LCD screen. Each server has a key built in, supposedly impossible to recover without destroying the system. Each film to be distributed is encrypted with both a master key, and the private half of the projector's key. There are several stages of decryption, allowing a mostly uncompressed and decrypted stream to be presented to the final stage electronics. The decryption at the projector stage is lightweight, as it is less likely to be subjected to a significant cryptographic attack because it relies on having fully authenticated equipment elsewhere in the chain.
The servers regularly contact an authentication centre, so that audits can be made as to the number of showings. The servers also come with tamper-resistant housings which then disable the system until it can once again contact the auth centre. There is a bunch of other security stuff, the projectors are never sold, but only licensed to the theatre for a fixed time and have to be returned or inspected at regular intervals.
From the article, it sounds like they only have the "medium" quality screens going in, at 2k by 1k pixels. This means they'll only be installed in smaller theatres, because such low resolution looks really bad on larger screens. Also, the compression isn't lossless, like the
F-G will be showing off these projectors this year at CeBit, according to marketing bumpf I got from them recently. This BBC story is probably based on a press release from the building tsunami of announcements leading up to CeBit.
the AC
Re: encrypted stream (Score:2)
Re: encrypted stream (Score:2, Informative)
Re: encrypted stream (Score:2)
A relatively small and easy-to-use E can be selected (verifying, of course, that it's relatively prime to (P-1)(Q-1) -- the easiest way to do that, of course is to choose a prime number for E)
Just to clarify, choosing a prime number for E is not sufficient to ensure relative primality. You also have to perform a trial division to find out if (P-1)(Q-1) is a multiple of E. If it is, you have to pick a different E.
Re:Now how long (Score:3, Insightful)
Are there such things as video projectors that accept an encrypted stream of data?
The article mentions custom projectors so I suspect that is exactly what they are going to do. A fairly standard projector may be packaged with the decryption and possibly decompression apparatus in a tamper resistant enclosure that not only is secured by high security locks but also has the private key stored in battery backed RAM with tamper switches that remove power to the RAM when the case is opened. The projecto
Re:Now how long (Score:3, Funny)
What's next ? taking care of the elderly ? Building schools ? Paying taxes ?
That's great. (Score:3, Funny)
Digital vs. Film (Score:4, Interesting)
Re:Digital vs. Film (Score:5, Informative)
Re:Digital vs. Film (Score:5, Informative)
If you shoot 35mm film, you get your negative, you cut the negative, you create a duplicate of the negative, then you create more duplicate negatives from that, then you finally create prints from those duplicate negatives. So by the time it gets to the cinema screen it's not unusual for a 35mm print to have gone through four or five _analogue_ copying stages from the original film negative.
As a result, the resolution of a final 35mm print is almost certainly substantially less than 2048x1080, whereas digital holds that resolution from start to finish (absent crappy compression schemes).
Re:Digital vs. Film (Score:5, Interesting)
Er, ignoring digital editing systems that cut at least one step out of that process, I'm not sure where you're getting "four or five" analogue copying stages even out of your own example.
"You get your negative" - this is the original film. "You cut your negative" - this is still the original film. "You create a duplicate of the negative" - ok, this is copy 1. "You create more duplicate negatives" - this is copy 2. You're not making copies of copies, you're making a bunch of copies from one original. "You finally create prints from those duplicate negatives" - this is copy 3. So, only three copies are made through the most laborious process possible - and digital editing systems cut one copy out of that.
Not to mention that film has been around for more than 100 years and so much R&D and technological advancement has gone into it over that time that the quality loss is really minimal through every stage. Sure, if you kept making copies of copies of copies of copies, eventually you'd see a real resolution difference from the original; but you won't in any commercial film.
As a result, the resolution of a final 35mm print is almost certainly substantially less than 2048x1080, whereas digital holds that resolution from start to finish (absent crappy compression schemes).
Different film stocks have different grain properties, and it's the size and distribution of the grains (the crystals) that hold the detail in analog film. Some film stocks have more than 3,000 crystals per inch, some have less. But all would be significantly and noticeably higher in resolution and detail than 2048x1080 digital resolution even after the production process was complete and all copies made.
I have seen several commercial films shot, edited and projected digitally - including Final Fantasy: The Spirits Within and the last Star Wars. They looked good - cleaner than film prints, surely - but there was noticeable and obvious (to me) pixelization and aliasing throughout the films. Most people probably wouldn't have noticed and/or cared, especially in the absence of the analog "noise" caused by film grain, but it was clear to me that either the projection system or the films themselves did not have the actual resolution of their film counterparts. I don't know what the resolution of the projection systems used in the US is, but I doubt it's much (if at all) lower than 2048x1080.
Re:Digital vs. Film (Score:2, Funny)
Re:Digital vs. Film (Score:3, Informative)
Actually (Score:5, Informative)
2) Positive Negative (copy on negative masked stock)
3) Dupe Negative (negative again) (digital editing here)
4) Copy Negative (positive)
5) Print Negative (shipped to theatres)
And no, you still have lots of resolution left at that point. I know people that have made the films you speak of, and matching curves between series was one of their most prized accomplishments.
(yes I worked for Kodak)
Re:Digital vs. Film (Score:2)
Yes, clean film stock run on properly maintained and configured equipment is currently superior to DLP in resolution and color representation, not to mention the random ordering of the grain which increases apparent resolution further.
However, most film is poorly cared for and projected on equipment that is outdated, misconfigured, or broken.
One of the three cinemas in
Re:Digital vs. Film (Score:2)
Re:Digital vs. Film (Score:2)
Suppose the screen is 10 meters wide. Then each of those 2048 pixels are going to be about 5mm square, which I think would be fairly noticable from anywhere near the front of the theater...
Re:Digital vs. Film (Score:2)
Re:Digital vs. Film (Score:3, Interesting)
Although 35mm photography and cinema use the same film stock the orientation is different. Still photography has the long side of the image parallel to the direction of the film advance. Cinema (except for IMAX) has the image oriented perpendicular. So the image area is about 0.75 x 1" or 2250 x
Re:Digital vs. Film (Score:2)
Interesting slip-up. That's Xenon arc, of course.
Re:Digital vs. Film (Score:3, Informative)
Jon.
Re:Digital vs. Film (Score:5, Insightful)
Well that's it then, isn't it?
It honestly seems lately like the film industry is trying to do absolutely everything in their power to dissuade me from going to movies. They show me loud and annoying commercials from the moment I walk in the theatre until 10 minutes after the movie is supposed to start, then show MPAA trailers that literally outright insult me mixed in with the previews. I have to go see the movie when they demand it, since anything that hasn't made a bajillion dollars by the end of the first weekend gets pulled from theaters permanently these days. And they've started overlaying on some-- but we don't know which!-- projections a bizarre flickering that is apparently enough to obliterate any attempt to film the movie, but we're for some reason supposed to believe won't consciously or subconsciously effect our enjoyment of the movie.
Now apparently they're going to start showing us nothing more than HDTV on a really big screen. And they're expecting us to pay a premium price for this.
Ever since The Commercials Unending started I've found it increasingly difficult to make myself go to the movies even when there's something out I want to see. Pretty soon I don't think I'm going to be able to make myself go at all.
Re:Digital vs. Film (Score:3, Interesting)
Outside of big releases with people dressed up like Jar Jar for the opening night and $1 family day at the movies, movie theatres are largely obselete. Last time we went to a movie, we ended up spending $25 for two people for, what, two hours? Amusement parks are cheaper per hour than that, and even they are way too expensive! ($50+/person/day to hug Mickey is just plain idiotic, IMO)
Re:Digital vs. Film (Score:2, Informative)
The film industry will see this sort of backlash, when HD goes mainstream, and it will innovate. The theaters wil turn away from what they have become, or many will fail. When TV first came out,
Re:Digital vs. Film (Score:2)
The digital projector at Grauman's Chinese Theater is probably the best in town, as far as lumens go at least.
I was under the impression that most major releases were using a DI process now days?
Re:Digital vs. Film (Score:2)
For Digital Cinema, they are actually talking about much better quality (even if the resolution is the same)
Re:Digital vs. Film (Score:2)
Re:Digital vs. Film (Score:2)
Re:Digital vs. Film (Score:3, Informative)
Re:Digital vs. Film (Score:3, Insightful)
Just most people just dont get the difference between analog data and digital data. Just saying analog data is like infinite bitrate is easier and get sthe point across (without the esoterics).
Re:Digital vs. Film (Score:2)
Re:Digital vs. Film (Score:2)
Re:Digital vs. Film (Score:2)
Film is made of molecules, which are made of atoms. Atoms are not infinitely small. Film therefor has finite resolution. You should know this.
So which is higher? You cannot assume that the analogue sytem has higher resolution
For instance, Cds store music to a greater level of detail than vinyl LPs do, due to limitations of the processes used to record music as wobbles in the grooves in the vinly. (60 Db dynamic range on vinyl, 96 dB on a CD).
Re:Digital vs. Film (Score:2)
Correct. The figure given is the upper limit of human hearing is 20KHz, and for a middle-aged male nearer 15kHz
Except for people with asthma, who top out around 30 KHz. Not sure what the deal is with Asthma giving you better hearing.
I've never heared of that, and a quick google turns up nothing on it. To be frank, it sounds daft. I get asthma sometimes and it does nothing for
Re:Digital vs. Film (Score:2)
That's a medical database. You haven't specified any search terms. Entering "asthma hearing" as search terms shows such highly relevant matches as "Incidence and outcome of congenital cytomegalovirus infection in selected groups of preterm and full-term neonates" and "mitochondrial DNA mutation and age related maculopathy".
Backtracking now?
Look, I'm open-minded but skeptical. I'd like to see evidence. Really.
Re:Digital vs. Film (Score:2)
Yes, or more precisely to refer to the ratio between the loudest and softest sound that can be recorded at the same time.
but with the 44 Khz sample rate standard used by CDs, you are pretty much stuck at a max frequency of 22 KHz
So. What. None of us can hear that high-pitched.
Re:Digital vs. Film (Score:2)
You just need equipment to store the data and equipment to retrieve it.
Its the same argument used by the "Infinite Frequency" wonks who say you just need better equipment to store more data (when Nyquist says no).
The real question (Score:1)
Re:The real question (Score:1, Funny)
Re:The real question (Score:5, Funny)
Impressive (Score:3, Insightful)
The new network will double the world's total of digital screens.
Wow, thats pretty impressive. i'm actually quite jealous. I wonder how long it will take for the states to get anything close to that.
Watch Philip Anshutzs (Score:3, Interesting)
Re:Impressive (Score:2)
/ oh, who am i kidding? the US spends every last penny on useless entertainment gadgetry.
Re:Impressive (Score:2)
I went to Arizona to see The Phantom Menace before it came out over here. Sheesh was that a disappointment. At least I did get to see the Grand Canyon, which wasn't...
10:1 lossless video compression? I don't think so. (Score:5, Interesting)
Re:10:1 lossless video compression? I don't think (Score:5, Informative)
Compare to digital tv.
Re:10:1 lossless video compression? I don't think (Score:2)
Of course you are right about the marketspeak. Some of the HD-DVD and Blu-Ray testing has revealed flaws even in D5 (5:1).
Re:10:1 lossless video compression? I don't think (Score:2)
Re:10:1 lossless video compression? I don't think (Score:2)
Re:10:1 lossless video compression? I don't think (Score:2)
I doubt they mean truly lossless (Score:4, Interesting)
To get anywhere near that much, you have to at least convert it to the sum of cosines using Fast Fourier Transformation, which, since it distorts the data by converting it to not the exact amounts but the nearest amounts, is inherently lossy.
Any programmers in the UK want to start a lawsuit for false adverts?
RTFA (Score:2)
Fiona Deans, associate director of AADC, said the compression was visually lossless so no picture degradation will occur.
The devil's in the details
You know... (Score:4, Interesting)
Still, I wonder exactly what scheme they use to play these.. And, if I work out the numbers...
100 GB for 2 hours. Thats 7200 seconds.
We dont know if thats GB or GiB, so lets assume its GB. 100GB/7200sec or 1 GB per 72 seconds. Thats about 13.9MB per second for all sound channels and video.
If they really do spend THAT much on making vinal film, why not instead hook up to a fiber optic network and transmit ALL films to a server at the theater?
Re:You know... (Score:3, Funny)
Camcorder... (Score:4, Funny)
How far does 1 Terabyte go? (Score:5, Insightful)
3 bytes per pixel (24 bit color) = 6635520 bytes per frame
24 frames per second (to match the framerate of regular film) = 159252480 bytes per second = 151.875 megabytes per second
1 terabyte = 1024 * 1024 megabytes = 1048576 megabytes
Therefore 1 terabyte is 6904.204 seconds of video
6094.204 / 60 = 115.070 minutes of video
That's just over 1 hour, 55 minutes of video.
Sounds pretty reasonable for most movies; I guess they'd need 2 hard drives for movies longer than that, which I guess wouldn't add all that much to the cost of distribution since a 100 Gb hard drive is what, 50 bucks?
I'd be more interested in learning what kind of hard drives they have that can read 151.875 Megabytes per second continuously. I'd imagine that if you don't use a filesystem and just stream raw video off of the drive it would help because the drive wouldn't do any seeking. Still, 151.875 Megabytes sustainable must require some kind of high end SCSI drive so I guess my original supposition of $50/hard drive must be off.
I'd say that this is an idea whose time has definitely come.
Whoops, forgot about the compression (Score:3, Informative)
Re:How far does 1 Terabyte go? (Score:3, Informative)
Re:How far does 1 Terabyte go? (Score:2)
If a 2h movie just takes 100GB, this can be easily done using an IP uplink.
Re:How far does 1 Terabyte go? (Score:2)
152 MB/s is way outside the sustained throughput that a cheap ATA drive could do, aside from the fact that those drives have poor reliability on the whole. That's even beyond the best case scenario for a transfer from cache on a SATA drive.
It has to be some custom hardware, and if it's a di
Re:How far does 1 Terabyte go? (Score:2)
Resolution (Score:4, Interesting)
Someone once mentioned to me that the frames that Pixar renders out for it's films are something on the order of 4000 x Something resolution, which sounds a bit more comperable to film.
Re:Resolution (Score:2)
Much of 'Toy Story 2' was rendered at 1280 x n resolution... I doubt anyone in the cinema noticed.
Re:Resolution (Score:3, Informative)
Re:Resolution (Score:2)
Pixar Resolution (Score:2)
For following films, I'm pretty sure they upped it to 2048x1536.
Thats great... (Score:2, Funny)
Drive crash? (Score:3, Insightful)
Re:Drive crash? (Score:3, Insightful)
Drives crash far less often than film breaks, but even then, TFA indicates that theatres would copy the data to their own system before showing it. It seems reasonable to either have RAID 5 on these systems, or just have a hot backup.
Re:Drive crash? (Score:2)
It would be absolutely hilarious to see a Windows GPF on the screen upon walking into the theatre. Not much RAID 5 can do, then.
Multiscreenings (Score:2)
Re:Multiscreenings (Score:2)
In fact some multiplexes have systems where the film comes off the reel, through a projector, onto a clever buffer reel, through another projector, then onto the takeup reel. This way they can show the same film on two screens, with overlapping times and a time offset to make the most efficient use of the lobby.
There's a working exhibit of one at th
Another reason to stay home ... (Score:2)
From a viewer's perspective, the comparative picture quality of a good HDTV (even a DVD shown on a TV with a good upscaler) will likely equal or exceed that of a "digital" movie theater, since resolution relates to screen size/viewing distance. In a nutshell, an inferior picture is only going to encourage more people to stay home.
Ro
Re:Another reason to stay home ... (Score:2, Funny)
;-)
Lower Resolution Option for High-Risk Theaters (Score:2)
Anyways, it seems to me that resolution could by varied from theater to theater for various reasons
And finally, perhaps even custom ad placement may be inserted in
Re:Lower Resolution Option for High-Risk Theaters (Score:2)
Resolution not high enough ? (Score:3, Interesting)
In sweden.. (Score:3, Interesting)
The resolution is pretty low... (Score:3, Interesting)
2048 x 1080 pixels (Score:2)
It's sure gonna look like crap at 20m diagnal.
It would be a good rez to download however.
Re:2048 x 1080 pixels (Score:2)
What this is... (Score:2)
Digital Cinemas in India and China (Score:3, Informative)
How is this news? (Score:2)
Perhaps this is news for the UK, but I recall seeing Star Wars: Attack of the clones [imdb.com] more than two years ago, in a South Western Ontario theatre [cineplex.com] (Galaxy cinema at Conestoga Mall for the locals) that has DLP digital technology [dlp.com].
I am not sure how the movie was delivered to the movie, but I vividly remember that I was close to the screen (crowded theatre), and seeing the pixels on some scenes, like on a low res monitor. Another guy told me that he too saw the pixels.
Perhaps for the UK, it makes sense to tru
Re:How is this news? (Score:2)
How else do you think we handle weekly deliveries and pick-ups? Air-drop?
I was thinking more along the line of electronically receiving them over the internet.
But, I agree, sometimes low tech is the most elegant and cost effective solution, not just technology for the sake of technology.
Film has far greater contrast... (Score:3, Interesting)
I suspect that digital projection will not provide anywhere near the rich brighness gradient we have come to expect from film.
better quality? i doubt it. (Score:5, Interesting)
Value of data (Score:2)
Financial institutions, such as banks, credit agencies, and payroll processors, should learn something from this aspect of the motion picture industry. Data about people should be treated as just as valuable (because really, it is).
Frame Rate: The Death Of Film (Score:2)
But Digital is going to overtake it. Not might, not could, and not just because the public is full of stupid people. Digital will overtake film, because digital will enable video with proper frame rates.
It's kind of funny talking to film people about frame rates. Given the general cluelessness of computer people about all things AV (I spent a few weeks working on low latency audio under standard ope
Re:Frame Rate: The Death Of Film (Score:2)
The fluorescent lamp at the back of every LCD screen flickers at 3000fps. Surely you are not suggesting that video played on my display outputs at 3000fps!
The flicker is not in the projection. The flicker is in the angular deviation against the eye resolving an object moving from one location to another. The lower the framerate, the bigger the jump. This framerate -- not flicker-rate, but framerate -- cannot be covered for by an analog projector. (Digital projectors could concievably i
No one's made the obvious 'network' comment? (Score:2)
Re:Anyone else misread the title (Score:2)
Re:Anyone else misread the title (Score:2)
-2A
Re:2k vs 4k (Score:2, Insightful)