Slashdot Mirror
HDTV via GNU Radio
NortonDC writes "High Definition TV has been successfully captured in its native data stream from an over the air broadcast by a software defined radio that is Free and open source from the GNU Software Defined Radio project."
GNU TV, where the scripts are open-sourced before the show airs and you know all the jokes before the intro starts rolling.
Mind you, if you knew when to cringe in Nerds (the competitor to Friends, where housebound geeks spend their days in an eternal LAN party with the occasional visit to the pizza parlour) at the "jokes", it mightn't be so bad...
-Mark
Can I FTP the second season of west wing yet? No? Okay then
...Scientists at the Smithsonian have decided that GNU is the stupidest acronym in the history of mankind, and decided to make an exhibit about it...
Repeal the DMCA!
Sounds too useful to exist.
It will taste the blade of DMCA before the end of the month.
Hey the users will say? >> I don['t know about you but when radio and television ARE DIFFERENT. User's blah radio blah television blah. But what can you say??
Why am I looking at 4MB images of Lenny Briscoe?
anybody care to explain what that means? Don't want to read the article, still tired from the genome stuff.
Fleur de Sel
"GNU/High GNU/Definition GNU/TV GNU/has GNU/been GNU/successfully GNU/captured GNU/in GNU/its GNU/native GNU/data GNU/stream GNU/from GNU/an GNU/over GNU/the GNU/air GNU/broadcast GNU/by GNU/software GNU/defined GNU/radio GNU/that GNU/is GNU/Free GNU/and GNU/open GNU/source GNU/from GNU/the GNU/GNU GNU/Software GNU/Defined GNU/Radio GNU/project."
Reply or e-mail; don't vaguely moderate. Ex-O'Reilly/MIT employee, now a full-time Google employee.
Here is the entire collection of mailing list conversations for the entirety of this project's lifetime.
You can see how tough roadblocks were overcome by a dedicated and brilliant team of GNU coders.
Reply or e-mail; don't vaguely moderate. Ex-O'Reilly/MIT employee, now a full-time Google employee.
Apparently, nothing.
For some life is not fair if things don't go their way all of the time.
news at 11
"It is a greater offense to steal men's labor, than their clothes"
HDTV is either 1920x1080 (1080i) or 1280x720 (720p). Where did the 2730x1088 resolution come from? It's obviously wrong (the images are obviously scrunched vertically).
Why does the image exceed 1920x1080? Isn't the highest HDTV resolution 1080p?
How much does the card that they used cost? Is it reasonable?
Is anyone else really confused about what has been accomplished here? What does GNU Radio do? The site's not too helpful.
Wow, guess that's one less application I would need to worry about needing specialized hardware for. Time to fire up the ol'deb box...
Wonder how much those cards cost... :|
Winged Power Photography
I've tried various google searches for terms like MC4020, MC4020 data acquisition card, MC4020 data card, etc., and the only results that actually refer to a data acquisition card of some kind are on either the gnu radio page, or the MC4020 Linux kernel driver mailing list archive. I can't find pricing or distributor info anywhere.
If it costs less than $400, though (which is unlikely), I'd pick up an MC4020 instead of a traditional HDTV tuner card.
Does anybody know if atsc_rx can be run realtime?
A solution to the problem with music today
Definitely looks cool, but I couldn't find any information about how long it takes to process each HDTV frame. I doubt it is nothing near real time!
So, can I go out and buy off the shelf suitable hardware to use with GNU Radio? Assuming I have a box with a reasonably fast CPU and a spare PCI slot. The web site seems strangely coy about covering this, unlike most driver sites where they say 'we successfully got working the card XXX from manufacturer YYY, available for $44.50 from ZZZ'.
;-)
Do I need an A/D converter, or what? Knowing nothing about electronics, where do I get such a thing? I just threw away my BBC Micro with its built-in 12-bit A/D... was that a mistake?
-- Ed Avis ed@membled.com
Seems really neat, but I found that card on a science site. ONLY 1000 pounds (Great Britan). I suspect that this isn't much cheaper in the US either ;-(
. js p?action=GetProduct&pid=91&sid=1
https://directory.adeptscience.co.uk/controller
The images on the site are at 2740x1088 resolution, but HDTV at max resolution is 1920x1080. You can tell from looking at the images that they're horizontally stretched, so something weird is going on.
But will they implement the Broadcast Flag?
sulli
RTFJ.
Surely NBC would throw a temper tantrum over the idea of hi-res captures over the air. Can anyone say DiVX-fest?
A Linux-friendly HDTV recording solution is definitely needed. Unfortunately, it seems that in order to record HDTV you need a $1300 Analog Input Board.
Can anyone with more knowledge about this project please post a less expensive solution if one exists?
"High Definition TV has been successfully captured in its native data stream from an over the air broadcast by a software defined radio that is Free and open source from the GNU Software Defined Radio project."
Huh?
[PowerPoint] is a tool for capitalist presentation
Shouldn't this project be illegal under the new FCC broadcast flag rule. Unless it incorporates DRM to force the user to respect the broadcast flag, that is.
The solution that has worked best for me...is to avoid public discussion. -- CmdrTaco
Does anyone know where to find an HDTV tuner card with drivers for Linux? I'd really like to move my whole theater into the digital domain, without installing Windows (which is DEFINITELY not the right tool for the job, so don't give me one of those "use the right tool for the job fool" posts.. Windows is never the right tool for the job, unless the job is to annoy your boss/employees/coworkers and waste all your money).
A solution to the problem with music today
5 -- You think a $3,500 computer with a 17 inch monitor is better than a $2,000 HDTV set with a 35 inch screen
4 -- You wanna take screenshots of Joe Millionaire and set them as your desktop wallpaper
3 -- You're unemployed and have nothing else to do aside from incessant blogging
2 -- Regular TV is _so_ '90s.
1 -- Record Cinemax skin flicks as part of the Masturbate For Peace campaign
Courtesy of The *nix Top 5
Reply or e-mail; don't vaguely moderate. Ex-O'Reilly/MIT employee, now a full-time Google employee.
At $1,299.00 for the PCI card that their driver is written for, I do not see this in my future. For that matter, I don't see that in the future of many hobbiests which makes this project rather useless to the general population at present.
See here for information on the product the GNU Radio project wrote the driver for: Measurement Computing
Maybe some day...
What exactly do I need to buy to start playing with this?
I'm more interested in the radio part than the TV part, but either way, the site doesn't give any indication of whether this is within the reach of the average geek or not.
What do we need, a TV tuner card with FM, or no card at all (is that why it's called software radio)?
If a card is needed, which cards satisfy BOTH of the following two conditions: 1) the card works under Linux/BSD and 2) the card is actually still available on the market today. (I ask that last part because of experience with old cards being supported, but not available in stores, for other functions like video and networking). And how much does the card cost? Is an antenna required? How much does everything cost?
Someone please clue us in. Thanks.
I have not yet got a feel for the computational power required to approach real time processing or typical performance. Does anyone else know?
All my previous sigs now look like this one, I wish they were permanetly recorded when used.
You would think gnu.org might be able to take the /. effect? I'm just downloading some of the 4MB .pngs to see who well their server holds up. There should be about half a million people doing the same in a couple minutes.
Looking at the images and seeing that huge ugly NBC bug in the lower-right corner. You'd think that at HD resolution the least they could do is make it smaller, but no. At least this was on the original broadcast network. When I watch The Daily Show on Canada's comedy network they plaster their opaque bug on top of the original comedy central one, and as a result I every so often miss out on something that the bug is crawling over. Is there any hope of HDTV killing these things? If it's a digital signal couldn't they transmit the bug out of band and let the TV reconstruct it when people change channels or something?
Man, I wish the Gnu folks would build their own hardware card rather than the card they are currently using - it's quite expensive.
I'd love to see them put a decent FPGA, an Intersil 50216 4 channel digital downconverter, and a nice 60 Msample/sec 12 bit flash A/D converter on the card - they could do that for a bill of materials of about US$200, and have enough power to do the capture properly.
Before you say "Fine - why don't YOU design it?": I'd love to get more involved in GnuRadio, but I'm afraid of potential conflicts of interest both ways - contaminating GnuRadio with my professional work and possibly exposing my employer to problems with GPL infringment.
Also, is anybody big in the Gnu Radio project going to be at IWCE (International Wireless Convenention and Exposition) March 10 - 14? If so, where? I'm getting in on an exhibitor's badge - maybe I could get pictures?
www.eFax.com are spammers
I have a TV tuner card which takes the feed from my cable box.
Does anyone know of any software that would enable me to unscramble cable signals in software? The tuner controller runs from software, but I can't use my computer as a TIVO b/c I have to use the cablebox to get anything.
The good and new comes from no quarter where it is looked for, and is always something different from what is expected.
here's the google cache of the site: http://216.239.33.100/search?q=cache:KWJY96KyuCAJ: www.gnu.org/software/gnuradio/
also, if you're interested in HDTV samples, this site has a bunch of HDTV trailers (complete with Dolby Digital 5.1 surround sound, as per the HDTV spec):
http://www.eecs.umich.edu/~balazer/hd_ads/
Bascially the aim is to drastically decrease cost and increase flexibility of radio signal reception and decoding by replacing lots of specialized electronics with software.
Now instead of a very expensive ATSC decoder for your HDTV-Ready TV, you will now have a box with an antenna, maybe a preamp, and a powerful DSP running in software.
The cool part is, you can reprogram or adjust the software as needed to create other capabilities, use other frequencies, or increase performance even after the product is shipped.
I'm sure I drastically oversimplified this, and probably don't realize the full scope of the benifits. Read up on it, use google.
But as applied to HDTV, this is an AMAZING accomplishment. We might soon have open-source HDTV decoding. I for one, would love to have the ability to directly access the native format of the TV signal, stream it to disk, multicast it on my home lan to the living room, whatever. COOL STUFF!
Take a look at this site: http://mail.gnu.org/archive/html/discuss-gnuradio/ 2002-09/msg00025.html
. They answer many questions put forth by... SLASHDOT.
As a snippet:
Here are my responses to some questions posed on slashdot last week.
They make a good beginning for our FAQ.
Eric
> 1) Hardware requirements (Score:5, Interesting)
> by wowbagger on 2002.09.09 13:58 (#4222011) ***** READ DATE
>
> The GNU radio page is a little thin on the hardware requirements to run
> the code - could you spell them out?
j
u
n
k
Seems interesting that this may be a 1 year dupe.
GNU Radio is a collection of software that when combined with minimal hardware, allows the construction of radios where the actual waveforms transmitted and received are defined by software. What this means is that it turns the digital modulation schemes used in today's high performance wireless devices into software problems.
Read the site! This is very important stuff and could have a huge impact on technology.mirror of two of the images:
http://www.pchopper.com/mirror/l-and-o-diner.jpg
http://www.pchopper.com/mirror/l-and-o-food.jpg
I found out by downloading the kernel driver source code that the name of the board is actually Measurement Computing DAS4020/12, and costs $1300. Thanks to the other posters for also mentioning this.
A solution to the problem with music today
Try one of the GNU mirrors:
e s/hdtv-samples.html
s amples.html
e s/hdtv-samples.html
a ges/hdtv-samples.html
: www.gnu.org/server/list-mirrors.html+gnu.org+mirro rs&hl=en&ie=UTF-8
http://gnu.sunsite.utk.edu/software/gnuradio/imag
http://gnu.wwc.edu/software/gnuradio/images/hdtv-
http://gnu.mscnetworks.com/software/gnuradio/imag
http://www.phildowd.com:4060/software/gnuradio/im
Basically, append software/gnuradio/images/hdtv-samples.html to any of the links from here: http://216.239.57.100/search?q=cache:1KyAbWv9nRAC
Withdrawal before climax is very ineffective and those who try this are usually called "parents."
It's the only one in this branch so far that actually has its facts about software radio straight.
All of the above represent part of the reason that I have completely stopped watching television. Did I mention that I don't purchase software that has any sort of copy protection? That's true as well.
The best way to fight DRM, copy protection, and all this trash legislation is to speak with your money: Don't buy products containing this crap. You could go further and do what I do: I buy the competition's product and then send a letter (not an email but a letter on real paper in a real envelope with a postage stamp and my real address on it) telling the company WHY I have just purchased their competitor's product as opposed to theirs. Nanny nanny boo boo.
Where a person has been caused by some alien technology to soak up knowledge, and then goes to the aliens to get squeezed.
It's been a short story, an Outer limits story, Star trek TNG (Barclay), Stargate SG-1 (O'Neil)
The url is http://mail.gnu.org/archive/html/discuss-gnuradio/ 2002-09/msg00025.html (no space before the 2002)
This has been covered here on Slashdot before. Some of the comments in the previous post are particularily informative.
Always value the individual over the system. --Bruce Lee "I don't need a Sig - I have a custom 191" - me
The Canadian sattelite company, StarChoice, has receivers that are produced by Motorola and General Instruments. The encryption algorythm used to encode the video was produced by Motorola under the name "Digichiper II," which was a step up from the previous "Digichiper."
I am wondering, has anyone decoded the encryption process? As well, would I be able to decode the information via my TV tuner?
Masturbate For Peace
"# 5 -- You think a $3,500 computer with a 17 inch monitor is better than a $2,000 HDTV set with a 35 inch screen"
:)
Compromise: Get a 35" HDTV with VGA inputs. Mmmmm...
"# 1 -- Record Cinemax skin flicks as part of the Masturbate For Peace campaign"
Screw that! There's gotta be Playboy/Spice decoders out there somewhere!
WhenYouHaveSoManyCharactersWithoutSpacesSlashcodeB reaksItUpToAvoidPageWideningPosts(amongOtherThings I'mSure).
Not his fault.
How is different from network tv, where the scripts are rehashes of something from 10 or 20 years ago and you know the entire plot (painful jokes included) in the first two minutes.
Wait a second, are you talking about network tv or slashdot?
Mordor...a magical, mythical land where women are more rare than dragons--but where every man would rather find a dragon
Now all I need is an ascii version. Then I'll be all set.
Warez for nerds, stuff that gets you busted
I see Amsterdam Vallon is using his army of karma whore accounts to mod up his template postings again. I wish more mods would spot this going on.
Also, keep in mind that the popular CRT and projection projection TVs will purposily overscan the picture such that some of the lines are pushed outside of the viewing area. So, while 1088 lines are broadcast, a projection TV may only show 1076 of them and clip 6 lines each from top and bottom. If overscanning results in only 4 lines being clipped then you will actually see only 1080 of the 1088 lines of MPEG-2 stream.
The width of 2730 pixels appears to be intended get close to the correct aspect ratio when displayed on a computer monitor. Based on how the people's heads look on my monitor, it seems to be a little over stretched. But when I return the images to 1920x1088, they clearly look squeezed.
Lay off the drugs, okay?
Actually, 20MHz isn't so bad - I work with 40 Msample/sec 12-bit flash converters, and there are 100 Msample/sec 12-bit flash converters on the market.
However, you DON'T build things like this with your brother's wood-burning kit and a old nail - These parts come in surface mount packages, and your board has to be carefully designed to maintain proper impedance matching on the RF traces, as well as having excellent grounding (RF and digital grounds meeting at one and only one point, ground planes cut as needed to prevent current loops, etc.).
Lastly, you need a proper dithering circuit to introduce noise equivelent to 1/2 of the least significant bit, in order to shape the quantization noise out of the frequencies of interest. Otherwise, you end up throwing away a couple of bits of resolution.
Those are the sorts of things you have top-notch RF designers laying out, and a top-notch fab build for you - either by having such a fab working for you, or by contracting it out.
www.eFax.com are spammers
...freedom to save, copy and even distribute copyrighted materials.
Freedom, save, copy, distribute and copyrighted on the same sentence? You must be kidding!
How many time to DMCA striking on that? My money is on a week.
I wonder if my buddy at Spectrum Signal Processing is reading this thread - perhaps they might be able to release a slightly lower cost solution to this.
Or not.
Hey Meirowsky - You reading?
www.eFax.com are spammers
Come up with your own set of software projects that change the world as we know it and you can name it *anything* you want.
OMG! Bryant Gumbel is funnier than that shit!
A great site for software-defined radio:
www.nitehawk.com/sm5bsz/linuxdsp/linroot.htm
" But as applied to HDTV, this is an AMAZING accomplishment. We might soon have open-source HDTV decoding. I for one, would love to have the ability to directly access the native format of the TV signal, stream it to disk, multicast it on my home lan to the living room, whatever. COOL STUFF!"
Well we of the United Sharing Association, would consider it your geekly duty to multicast to the rest of the world.
Oh wait, that one's taken. Nifty Doorways?
Go here to create your own Slashdot dis
Whaddya mean? The card they used is only about US$1300 ;-)
-psy
This project isnt just for HDTV but any radio signal one can capture, convert and sample to extract data. This software could be used as an XM radio or possibly a digital cable descrambler. All you need is a decent A/D card (one that can handle the bandwidth of the signal you wish to decode) and associated tuning circuitry. All the signal processing is done on the computers CPU. With SMP boxes, x86-64 and other CPU technology on the horizon the possibilities of building software recievers for most any digital signal is definatly something worth looking into.
Another thing people have to realize is that its just a reciever, the digital stream has to be decoded by another program making it perfectly legal. The program that might have to crack encryption or remove/ignore copy protect bits to record or view that data stream is what will be illegal.
I hope so. An ideal implementation:
% gnutv --verbose --chan 13 --out alias.ts
Copyright 2003 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details, run gnutv --warranty
Capturing channel 13...
Writing MPEG transport stream to alias.ts...
Broadcast flag detected and ignored...
Recording...
Its size makes it impractical for anything like a Tivo. Until I can either get a realtime MPEG-4 encoder to compress these streams or get the data on the next DVDs its unlikely I'll be seeing any HDTV on my computer in the near future. I can barely afford to process and store all my regular NTSC video. Can you imagine how long it would take to compress a 2-pass 1280x1024 2-hour movie into an xvid/ogg file?
let me see if i understand this correctly...
they can intercept HDTV signals without the expensive set-top box...but what is stopping them from recording it? its copywritten material, but is it being released into public domain?
The 12 bits in the RX is not really the limiting factor.
A 12 bit A/D raises your quantization noise, but the quantization noise is at the sampling frequency - you can "shape" the noise away from the signal of interest, and gain bits as you process the signal.
This is the trick that the 1 bit D/A sections in modern CD players use - the D/A is only 1 bit, but running at a very high rate (1MHz or more). As a result, the quantization noise is all above the audio band, and the system has the low-frequency resolution of a 16 bit system.
Think of it as dithering - really, that is what it is.
www.eFax.com are spammers
Why a $3,500 computer? At Walmart, a 1.1GHz Duron-based PC is $200. Besides, an HDTV set can't record, time-shift, re-encode to DivX, etc.
Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
Does the $3,500 include the $1,300 cost of the Measurement Computing PCI-DAS4020/12 20
If you had a TV, I'd recommend you check out The Daily Show. Its informative, insightful, and funny. Although, yes, it is kind of a news show.. ..So I take it you're not a Buffy fan? :)
A troll hating on other trolls? How sad.
The "Pot of Gold" was great...
so much Latin slap-stick to choose from...
good memories...
Well, for $1299 you only get an A to D board. But a pretty important part of a GNU software radio project is a digitally controlable tuner that can feed this board. This thing can't convert from the R/F directly, you need a tuner to get the signal down to a low enough frequency range that the $1299 board can deal with it. In addition, the tuner must output a suitable singal that the board can use and it must be tuneable over a wide enough range of input frequencies to be worthwile. What does it really cost to play with GNU radio? This $1299 board doesn't really get you in the door!
I'm an American. I love this country and the freedoms that we used to have.
The majority of the rest of the world is not connected to network backbones that support multicast. Also, ATSC can carry MPEG-2 streams with a maxium burst of around 19.2Mbps. For a 100Mbps network or even a 55Mbps wireless, this isn't much of a limitation to retransmittion. But for most DSL/cable connections this limitation will keep retransmittion from ever occuring real-time without re-encoding.
I've got a PVR; I leave it on all the time so when I walk into the room and I'm interested in what's on, I can rewind and watch it from the beginning. Unfortunately, that only works for the one channel that the PVR is tuned to. If I change the channel and see something interesting, I can't rewind it. What I want is is PVR that records the last hour or two of every channel that I get.
GNUradio is the receiver for that PVR. The PVR records the unfiltered signal from the antenna. That gives you all the channels at once. When you want to watch a show, the GNUradio software reads the raw data and filters out the channel you want. If a show looks interesting, you can rewind and watch it from the beginning. Even if there are two or more interesting shows on at the same time, you can filter them both in parallel and re-record one or more while watching another.
Nothing for 6-digit uids?
Since you asked, 369 Representatives. They also have 80 Senators for a total of 449 congresscritters. That's 84% of congress.
The gnuradio package does include an atsc_tx signal modulator, but I don't know what kind of hardware is necessary to actually get the signal in the air. Transmitting is probably just the reverse of receiving, so you're probably looking at a 20MHz ADC, some way to modulate the carrier, then remove it so that only the sidebands remain (an 8VSB signal modulator - did I get that right?), a 50-1000MHz multiple kilowatt amplifier, and an antenna.
I have no idea what any of that would cost, but if I had to make a guess, I'd say that you could have pirate GNU Radio-powered HDTV for not more than a million dollars or so.
A solution to the problem with music today
"and act as an 802.11 card to boot"
There is a company in my lug looking to rig sevral 802.11 cards into a wap for a cheap toaster firewall/router type thingy.
There is a FCC unregulated application for such a (two way) D/A card and transmiter/reciever. EE geeks you should be scott free from hollywood evil accusations.
Novel theory: Modern Man evolved from psychopath
Where do I learn more about this, other than the obvious BS in EE option?
Do your math homework... and if you're not in school, just pick up, read, and do the exercises in a bunch of good calculus and linear algebra textbooks. (The key is to actually *DO* the exercises, math is not a spectator sport!) If you've been away from it for a while, I recommend Sylvanus Thompson's 1910 classic, Calculus Made Easy. Chapter 1 is titled, "To Deliver You From The Preliminary Terrors". The book is still in print.
Calculus sounds terrifying, and most people think of it as a weed-out course. But if you do the exercises, any idiot can get an A+ in it. Only the intelligent see the sheer beauty and elegance of Newton and Leibniz' greatest contribution to the world. And you'll find yourself using it everywhere - calculus is the mathematical equivalent to the speedometer in your car. You could calculate your speed by looking at the odometer and your watch, but the speedometer essentially takes the derivative (finds the rate of change) of your position.
Most of these modulation techniques are based on the mathematical manipulation of sinewaves. You have to have a good understanding of trigonometry, complex numbers and multivariable calculus. Then, Fourier is your Big Friend In High Places.
With the mathematical basis in place, the modulation schemes themselves might be best left to a math degree rather than an EE - though, in my program, the double-degree was only a two credit option.
(Bachelor of Mathematics is also fun; mathematicians are almost always crazy, and it's really great to see how frightened or awestruck Joe Public gets by someone who has a degree in math. Even with "just" the iron ring, you can tap it incessantly on the boardroom table every time the boss says something stupid.)
And I have to tell you - I can't say that I understood all of what the original poster said - I didn't. I stick with EM and power more than the rather abstract modern modulation systems.
"I've balanced the budget for you, but I had to take the square root of a negative number to do it."- Quoted by memory from Dilbert cartoon e-mailed to me after I described an incident where a friend of mine *actually did that* to our former boss.
Fire and Meat. Yummy.
nasdaq level II quotes? They stream the quotes over the airwaves, then use a decoder/receiver to display them on handhelds and home computers/ televisions. Can I get the quotes? Huh? Huh? I gotta check my ms holdings. I own ms. (VIP ms owner in limo, get everybody ready at the hotel!). Since billy is selling, selling, selling, I gotta check the price every 30 seconds.
wireless telephone conversations?
pron?
should I pull out the old hbo microwave antenna and hook it up to my computer? Is it worth more as an antique?
Sounds too useful to exist.
Here's something I'd like to find, but I haven't been shopping around yet, and I don't know whether it's available or not. I'm also in Canada, and we've been a little slower to adopt HDTV up here, so I can't walk into Future Shop and browse with the same number of products available.
I really have little use for large TV sets.
On the other hand, VGA monitors capable of doing 2,000 horizontal pixels must already be available somewhere - not that I've been shopping for one of those, either. Either way, I still expect it would be cheaper than a 16:9 HDTV monitor.
Anyone know of any set-top boxes which receive HDTV and output letterboxed VGA video, either in the same resolution or down-converted to a popular VGA resolution?
Fire and Meat. Yummy.
I meant to title the above comment
because that's what I saw. But Slashdot chopped off my parenthetical. Had I but pressed Preview, I could have used hyphens instead and that would have worked. Darn.
Sunlit World Scheme. Weird and different.
See! We told Congress that everyone is an Evil Content Pirate(tm), but you guys wouldn't believe us! We need that Fritz Chip yesterday!
General Relativity: Space-time tells matter where to go; Matter tells space-time what shape to be.
Everyone's a comedian...
> High Definition TV has been successfully
> captured in its native data stream
Ass hairs around Nina Hartley's rectum, here we come!
AMPS is the Advanced Moble Phone System - the system commonly in use in the USA (it was named a long time ago - and at that time it WAS advanced).
As for DoS'ing a cell tower - yes and no. A CDMA signal is much less affected by a narrowband carrier than GSM would be due to it being spread spectrum - the system will just work around the interference.
GSM used TDMA (time domain multple access) - each phone transmits only for a short period of time, at an assigned time. There are six time slots, and each phone gets one or two of those time slots.
You might therefore wipe out up to six conversations by jamming one channel in GSM.
However, the cell sites will immediately note the interference, and will move the calls off that frequency. And the site will be able to determine which sector the interference is in (a sector is 60 degrees). Multiple sites will report, and so they will have your position pretty quickly. Do this for any length of time and the black vans will roll. And they WILL track your sorry ass down very quickly, and you WILL be looking at striped sunlight.
www.eFax.com are spammers
Can be found here:
http://www.ettus.com/sdr/sdr_w6yx.pdf
"Consensus" in science is _always_ a political construct.
But for ~ $400 you can buy an HDTV receiver card that you can put into your Wintel box that will let you record the HDTV ATSC over the air streams. Then you can watch it at your leisure.
You can buy the hardware from here
-- main(s){printf(s="main(s){printf(s=%c%s%c,34,s,34
Go fuck yourself.
Im proof that the left can have just-as-much vitrol and anger as you smug plutocratic cheerleaders.
Again, Fuck-you Russ Smith.
I think I heard something like 40x realtime.
As in 1 minute of HDTV will take 40 minutes to display.
retrorocket.o not found, launch anyway?
If he once again pushes up his sleeves in order to compute for 3 days
and 3 nights in a row, he will spend a quarter of an hour before to
think which principles of computation shall be most appropriate.
-- Voltaire, "Diatribe du docteur Akakia"
- this post brought to you by the Automated Last Post Generator...