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Terabit Fiber (In 2010)
Posted by
CmdrTaco
on Sun Oct 30, 2005 10:00 AM
from the sign-me-up dept.
from the sign-me-up dept.
Paul Heavens writes "A Japanese company has developed technology to transmit a two-hour movie in 0.5 seconds, the world's fastest speed achieved with fibre-optic cables in the field, it says. Kansai Electric used fibre-optic cables on power-transmitting steel towers to achieve the speed of one terabit per second, which is more than 100 times faster than inter-city data transmissions currently in use, a spokesman says. The company, Japan's second-largest power supplier, has not decided when to put the technology into practical use but says it is possible that it would come in 2010 or later."
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"transmit a two-hour movie in 0.5 seconds"? (Score:5, Funny)
Re:"transmit a two-hour movie in 0.5 seconds"? (Score:5, Funny)
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Re:"transmit a two-hour movie in 0.5 seconds"? (Score:5, Informative)
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Re:"transmit a two-hour movie in 0.5 seconds"? (Score:4, Funny)
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Re:"transmit a two-hour movie in 0.5 seconds"? (Score:5, Informative)
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It's not that much data. (Score:3, Interesting)
1 Tb of data is approximately 125 GB. The movie they're talking about is half of that, thus 62 GB. And that's probably not compressed. A PC with even just 64 GB of RAM could easily buffer such a movie in-RAM. With 500 GB hard drives being fairly mainstream today, saving such films isn't even that much of an issue, even without ta
Re:It's not that much data. (Score:4, Interesting)
DVD resolution: 720x480 = 220GB of raw video data on 8GB DVDs
HD-DVD resolution: 1920x1080 = 1.3TB of raw video data on 20-30GB media
Ultra-HD resolution: 7680x4320 = 22TB of raw video data (in NHK's studios)
The 1Tbps wire speed probably includes framing bits just like most other serial links do so the actual usable bandwidth will be under 100GB/s with the typical 10bits/byte (4B/5B coding) approximation. Add other wire/link-level protocol details and the real-world usable bandwidth can dip even lower. 1/11 would probably be a more accurate wire-to-bytes approximation.
This would still place the transfer at around 45GB... a little on the high side even for the upcoming HD-DVDs. The only uncompressed video signal I can think of that would be around 90GB/2h is 12bits/12MSPS sampled standard definition composite. I wonder how many movies are actually stored in this format.
Parent
Re:It's not that much data. (Score:2, Informative)
Re:"transmit a two-hour movie in 0.5 seconds"? (Score:2)
Re:"transmit a two-hour movie in 0.5 seconds"? (Score:2, Funny)
Details (Score:2, Interesting)
2-Hour Movie Units? (Score:2, Funny)
Re:2-Hour Movie Units? (Score:2)
Maximum transmission units (Score:5, Funny)
Cool, but... (Score:3, Insightful)
Re:Cool, but... (Score:3, Informative)
Re:Cool, but... (Score:3, Interesting)
1980 called. They'd like their anti-religious hysteria back.
No such thing is true. We continue to innovate and changes in the market and focus at various companies have nothing to do with any "religious climate".
Sheesh. The way some
These sorts of links are for
Re:Cool, but... (Score:5, Insightful)
What do you mean? When I was a kid, fiber cable was just a novelty you read about in Popular Science. They claimed that it had the potential capacity to transmit things like War and Peace in just a few seconds.
Well, guess what: Today, in the comfort of your own home, you can download [gutenberg.org] War and Peace in just a few seconds.
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Re:Cool, but... (Score:5, Insightful)
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Re:Cool, but... (Score:3, Interesting)
You have NO other options for landlines.
Since this approach hasn't worked, perhaps we need to get to the core of the pro
Re:Cool, but... (Score:3, Insightful)
THEN WHY ARE YOU READING SLASHDOT???
Not with this specific technology, no. But already, companies (particularly Verizon) are starting to set-up fiber-optic networks to compete with high-speed cable. I've recently heard a FIOS network is soon to be built in a nearby cit
that's nothing. (Score:5, Funny)
Beat that, japan
Re:that's nothing. (Score:2)
Re:that's nothing. (Score:3, Funny)
Ha! My aerodynamic hd enclosure is still accelerating while yours is stuck at terminal velocity.
Re:that's nothing. (Score:5, Funny)
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Where's the beef? (Score:5, Interesting)
Re:Where's the beef? (Score:2, Informative)
What about this? Do we have systems that can accept around a terabyte of data in its storage? Google has an operation speed of 4 tera-ops/sec source: http://cache.technologyreview.com/articles/ 04/04/wo_garfinkel042104.0.asp [technologyreview.com] . Assuming each byte takes an average of 2 cycles (which is a very low estimate), google cant use the entire bandwidth, even with their world's largest distributed system infrastructure!
. Are we getting to a state where we are going to f
Re:Where's the beef? (Score:2)
Re:Where's the beef? (Score:3, Funny)
*Bitrates may vary.
"Honey, did you pick up that new movie?..." (Score:3, Funny)
I dont trust this (Score:5, Insightful)
1) They didn't transfer 1 Tbit/s in an actual network, at least it appears that way if you RTFA. I am more impressed with Bell Labs 100 Gbit/s in actual ethernet reported a few weeks ago. As far as I know they could have measured the rate photons got from point A to point B in the cable, worthless statistics, like measuring the speed of electricity.
2) According to other news entries like RTFA, they don't contain any info whatsoever about how the company actually conducted the test. One source, Returters IIRC, says it's "secret". Right.
Finally... (Score:2)
Cost?! (Score:2)
For only $499.95 per month (Score:2)
Remember, Americans; the FCC is designed to screw you.
2 hr movie in 0.5s (Score:5, Funny)
Re:2 hr movie in 0.5s (Score:3, Funny)
3 minutes (Score:5, Insightful)
The 3 minute mark seems consistent over the years as the shortest period of time necessary to acquire something of value. Shorter times are nice but not needed.
To download a 2 hour HiDef movie in 3 minutes, we'd need a connection speed of 222mb/s (28MB/s). I can see little need for a format beyond this at any time in the future. In fact, in 1993 I figured a preferred video resolution would be 2560x1440, not much greater than 1920x1080.
We'll soon see posts about how corporations won't want to spend money running these fibers to the home, but this is pure bullshit. Cities prevent more cable runs, not economics.
Municipal Wi i is a huge waste due to ever increasing wired bandwidths and the costs and latencies of government changes would never keep up with free market changes.
Allow ISPs the freedom to run fiber. Deregulate TV and radio frequencies in exchange for more wireless frequencies. You'll see the most amazing growth of information distribution in history.
Re:3 minutes (Score:3, Insightful)
Re:3 minutes (Score:2)
Fast, but maybe needed (Score:3, Insightful)
If only 10 gigabit upload service for the user was widely available, one could imagine some great solutions to the problem of offsite backups (perhaps 20 minutes per terrabyte, allowing for necessary overhead in the transfer). Could this be Google's challenge for the next decade?
3Ms - 3Ts (Score:3, Interesting)
The box i'm using to edit this note executes on the order of 1 GIPS, with 100 mbps, and 10 gigabits of memory. That is 1,000,000 instructions per second, 100,000,000 bits per second (10,000,000 bytes per second) to disk, and has on the order of 10,000,000,000 bits of RAM (1 GB). (These numbers are rounded, and, no, i'm not terribly interested in my-box-is-faster-than-yours pissing matches - its just an example).
So, if communications speeds will be 1,000,000,000,000 bits per second anywhere by 2010, that implies a computer with at lest 10 GIPS and 10 GB RAM - which doesn't seem that unlikely in five years.
Oddly enough, I'm hoping to still be running this box in five years. Its only two years old, and I don't really want to get a new one. That is, i don't want to spend the money to replace it. More importantly, i don't want to do the administration involved to get a new machine up and running with my current set of capabilities. I ran my 1987 Machintosh II as my primary machine for over ten years and the hardware lasted an additional five years (and counting) to allow for transfer of data. It pisses me off that my most long-lived x86 based PC has lasted only five years. So, i've just finished migrating from the Mac to Linux, and the Mac (with OS/x) now appears to be the better choice (low administrative maintenance) again.
With the recent announcement of low power PPC chips, perhaps Apple will abandon its move to the x86 hardware platform. Still, i've been pretty happy so far with my low-end Athlon's performance and reliability. Who knows? Perhaps i'd be happy with OS/x on AMD.
Why? (Score:4, Insightful)
Journalism has Crashed and Burned (Score:3, Insightful)
Re:Journalism has Crashed and Burned (Score:2)
Terabit transmission is nothing new (Score:2, Interesting)
Mabey by then I could get DSL in my area. (Score:4, Funny)
oooow, (Score:5, Funny)
whats the point here? (Score:3, Interesting)
Re:whats the point here? (Score:3, Informative)
Not as fast as the Italians (Score:3, Informative)
By the way -- 0.5s * 1Tb/s = 500 Gbit = 64 GByte = 58 GiByte. Pretty long movie, I'd say