Slashdot Mirror
1 Terabyte Optical Storage Disks
fenimor writes "Physicists at Imperial College London described a new method for potentially encoding and storing up to one Terabyte of data, or 472 hours of film, on one optical disk the size of a CD or DVD. Maybe it won't be as large, as 100TB holographic optical storage, but still should be enough to fit every episode of The Simpsons on one disk. Dr Török, Lecturer in the Department of Physics, believes that the first disks could be on the shelves between 2010 and 2015."
Just thought I'd nitpick, but at 10-bit log depth, 4k academy aperture scans of 35mm motion picture film (which is about the standard now for digital postproduction), 1TB will only hold about 13 minutes of footage! :)
At 2k, it's a much lengthier 55 minutes or so
Saying things like 472 hours of video is fairly meaningless without saying what KIND of video.
When you're speaking of a circular optical media, it's called a Disc, not a Disk.
Hence Compact Disc, Digital Versatile Disc.
From TFA...
Physicists at Imperial College London are developing a new optical disk with so much storage capacity that every episode of The Simpsons made could fit on just one. Speaking at the Asia-Pacific Data Storage Conference 2004 in Taiwan today, Dr Peter Török, Lecturer in Photonics in the Department of Physics, will describe a new method for potentially encoding and storing up to one Terabyte (1,000 Gigabytes) of data, or 472 hours of film, on one optical disk the size of a CD or DVD.
Physicists at Imperial College London are developing a new optical disk with so much storage capacity that every episode of The Simpsons made could fit on just one.
Speaking at the Asia-Pacific Data Storage Conference 2004 in Taiwan today, Dr Peter Török, Lecturer in Photonics in the Department of Physics, will describe a new method for potentially encoding and storing up to one Terabyte (1,000 Gigabytes) of data, or 472 hours of film, on one optical disk the size of a CD or DVD.
All 350 scheduled episodes of The Simpsons, totalling 8,080 minutes of film, could be easily stored on the new disk, dubbed MODS - for Multiplexed Optical Data Storage - by the Imperial College team.
The 1TB disk would be double sided and dual layer, but even a single sided, single layer, MODS disk could hold the Lord of the Rings trilogy 13 times over, or all 238 episodes of Friends.
MODS disks will not be the first to challenge DVDs' domination of the audiovisual optical disk market. BluRay disks, which have five times the capacity of a DVD at 25GB per layer, are expected to be released towards the end of 2005 for the home market.
The Imperial researchers, working closely with colleagues at the Institute of Microtechnology, University of Neuchâtel, Switzerland, and in the Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki, Greece, estimate that MODS disks would cost approximately the same to manufacture as an ordinary DVD and that any system playing them would be backwards compatible with existing optical formats - meaning that CDs and DVDs could be played on a MODS system. Dr Török believes that the first disks could be on the shelves between 2010 and 2015 if his team are able to secure funding for further development.
"According to our experimental results, we can optimistically estimate that we will be able to store about one Terabyte per disk in total using our new method," said Dr Török, leader of the research. "This translates to about 250GB per layer, 10 times the amount that a BluRay disk can hold."
The Imperial researchers and colleagues at Neuchâtel and Thessaloniki filed a patent covering their ideas in July 2004.
Under magnification the surface of CDs and DVDs appear as tiny grooves filled with pits and land regions. These pits and land regions represent information encoded into a digital format as a series of ones and noughts. When read back, CDs and DVDs carry one bit per pit, but the Imperial researchers have come up with a way to encode and retrieve up to ten times the amount of information from one pit.
Unlike existing optical disks, MODS disks have asymmetric pits, each containing a 'step' sunk within at one of 332 different angles, which encode the information. The Imperial researchers developed a method that can be used to make a precise measurement of the pit orientation that reflects the light back. A different physical phenomenon is used to achieve the additional gain.
"We came up with the idea for this disk some years ago," says Dr Török. "But did not have the means to prove whether it worked. To do that we developed a precise method for calculating the properties of reflected light, partly due to the contribution of Peter Munro, a PhD student working with me on this project. We are using a mixture of numerical and analytical techniques that allow us to treat the scattering of light from the disk surface rigorously rather than just having to a
This sig contains repetition and redundancy.
A similar story was posted last month on slashdot.2 4&tid=198&tid=1
http://slashdot.org/article.pl?sid=04/08/25/16392
Optware -- the company claiming to have done this a month ago -- has a press release available at:
http://www.optware.co.jp/english/what_040823.htm
a new method.
holographic optical storage
Caught it about 90secs before it started intermittently saying "PhysOrg is temporarily unavailable."
You know you've been IMing too long when you almost say 'lol' out loud to a non-geeky friend...
What does it have to do with hard drive storage?
Moore's law is an empirical observation stating, in effect, that at our rate of technological development and advances in the semiconductor industry, the complexity of integrated circuits doubles every 18 months.
Not a Twitter sockpuppet... but I wish I was.
Moore's law concerns the number of transistors on a die, although drive capacity does follow an exponent law, but at a different rate.
It seems that it takes about ten years for hard drive capacity to multiply by ten. That means a doubling of drive capacity approximately every three years. By 2010, there might be 1.6TB drives. By 2015, people might be buying 5TB hard drives. A 1TB optical disc might not be too bad during that time frame.
The problem is that many of these projects die in their infancy. The last big one I remember was Constellation 3D's FMD, but I really wasn't sure the claimed material science of flourescents / phosphorescence was real on that one, it was hard to distinguish it from a fully vapor project.
Why is parent modded flamebait? Hint: http://en.wikipedia.org/wiki/Irony
^^
If we assume the PAL resolution (768x576) using the NV12 pixel format (at an average of 12 bits per pixel), and PAL framerate (25Hz (50Hz when deinterlaced)), we get 16 588 800 bytes per second. At this rate, 1 TB (or 2^40 bytes) would give you 18 hours of video.
Implying a compression ratio of 1:25 when talking about storage doesn't help the quality of the information.
So 332 angles means another ~16.3 bits of data per pit. "Tens of gigs" * 16.3 could give close to a TB, depending on your number of tens.
Insert witty saying or aphorism here.