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Digital TV Transmitter Using a VGA card
An anonymous reader writes "Yet Another Project from Fabrice
Bellard : with any PC and a standard VGA card, you can build a
real Analog or DVB-T Digital TV
transmitter by directly generating the VHF signal. The provided
example shows a Lena
picture transmitted as a real Digital TV channel."
By the way, who the hell is he?
Hoooray to /. and it's perpetuation of crappy mysogyny!
Today's fortune:
"I've finally found the perfect girl, I couldn't ask for more, She's deaf and dumb and over-sexed, And owns a liquor store. "
Once someone posts how to do this with NTSC (which you'll need if you're in the U.S. like me), I'll be all over this! Anyone? Enlighten me...
...
Linux is better blah blah..
But I've Windows, any chance of getting Windows to do this?
coming right after the story about Utah? Slashdot, are you trying to cause the Utah law to fail?
Jurors reach verdict in Jackson trial
SANTA MARIA, California (CNN) -- Jurors in the Michael Jackson child molestation trial told the trial judge Monday that they have reached a verdict.
The announcement came after about 32 hours of deliberations.
Earlier Monday jurors requested the continuation of the reading of the teen accuser's lengthy testimony, sources close to the case said. The accuser was on the stand for four days in March.
Meanwhile, attorneys for media outlets, including CNN, filed another motion with the court Monday, demanding access to hearings where the court is answering jurors' questions and requests to listen to the reading of previous testimony.
"Barring the public from these final, pivotal stages of this case is, from a constitutional standpoint, simply intolerable," the media attorneys argued in their motion.
Santa Barbara County Superior Court Judge Rodney Melville has set a hearing for Thursday on a previous request to disclose jury questions and release transcripts of hearings.
Media attorneys have been pressing the judge to move up the hearing's date, arguing that their request will be moot if the jury reaches a verdict first.
Jackson's attorneys have filed a motion opposing the media's request, arguing that providing public access to the jury's questions, and hearings related to them, "would invade the confidentiality of the jury deliberation process and would threaten Mr. Jackson's right to a fair trial."
Sources said Melville and attorneys in the case have met at least three times as jurors deliberated.
The jurors adjourned Friday afternoon, ending six days of discussion on the 10 accusations against the pop star.
Spokeswoman dismissed
Jackson's Web site said Friday night that the singer had fired his spokeswoman, Raymone Bain, who has been with him throughout the trial.
"MJJ Productions regretfully announces the termination of Raymone Bain and Davis, Bain & Associates. We thank you for your services," said the complete text of the statement at www.mjjsource.com.
Lead defense attorney Thomas Mesereau Jr. visited Neverland ranch Wednesday after a flap arose over who should speak for Jackson.
Mesereau received court permission to release a statement saying that he had "not authorized anyone to speak or hold press conferences on behalf of Michael Jackson or his family."
Jackson and his family posted a similar statement on his Web site.
Jackson fans and supporters have joined the media from around the world outside the Santa Maria courthouse each day for news of a verdict.
Jackson, who is not required to be on hand for deliberations, has been awaiting the jury's decision at Neverland with his family.
The 46-year-old pop star is facing judgment on 10 counts, stemming from events that allegedly took place with a 13-year-old boy two years ago: four counts of lewd conduct with a child younger than 14; one count of attempted lewd conduct; four counts of administering alcohol to facilitate child molestation; and one count of conspiracy to commit child abduction, false imprisonment or extortion.
Jackson has denied the charges and pleaded not guilty.
CNN's Dree De Clamecy and Rusty Dornin contributed to this report.
Then I'd become a professor or some teacher or something!!!
Please Mod me "Offtopic"! I'm an Oldfart (TM) who likes seeing young folks getting into heated discussions about their passions I guess I'm an - An "Old Troll"!
Thank you!
It also goes to show TEMPEST attacks are real. Your screen is transmitting what's on it in a way that's detectable over quite a distance. Shielding is worth looking at if you're doing something sensitive.
I am trolling
Check it out, a half-meg pair of boobs. I can smell the smoking server from here.
This is a great idea. If there is a way to make the signal just a bit stronger you can hack your own wireless media center.
Isn't it ironic that there's a link to the Lena picture right above Utah's attempt at blocking porn?
Until this project is rendered illegal in the US under some DMCA-style bullshit. After all, you might be able to (gasp!) record something off of your incoming television signal.
Of course, only pirates and pedophiles will have a use for this project.
(The last part of this post is a JOKE, gawddammit!)
"Rocky Rococo, at your cervix!"
+1 point
shame he wont tell/show anyone how its done (ie. the source code)
-2 point
The slashdot effect + a nudie photo. Say goodbye to that server.
http://www.thelung.org
WARNING - story post contains link to PORNOGRAPHY!
who in their right mind would post a link to a site with a playboy nude on it to Slashdot???
Talk about asking for a slashdot "effect"
Now if I had some DV software and a little time, I could do a re-play of the "Martians are attacking us!" program. A re-creation of that 50's-ish alien invasion hysteria to my roommate or next wall neighbor. What advanced alien race wouldn't transmit digital TV?
....is more interesting than the main one. At my company when I started 6 years ago, I stumbled upon the Lenna picture, just thinking it was an ordinary pic. Few years later I saw the er, um "full" pictures. Didn't know she had a cult following.
Yes, that Lenna picture I assure you is still in use after all these years. A pretty "hello world" image.
"(The last part of this post is a JOKE, gawddammit!)"
Actually both parts are because it relies on the readers ignorance of what the DMCA actually says.
Watch out internet!
:/
Porn just found a whole new outlet.
Stop hogging the bandwidth with the full size Lenna image! All I want to do is read the text (honest) and it's taking ages...
I clicked on the link while I was at work, now I'm waiting for the network security people to remove me from my workstation.
On a side note: WARNINGS PLEASE!
If you disagree with me on social issues, then it's pretty clear that you are a narrow-minded bigot.
It's called Tempest for Eliza. I remember it being pretty cool when I tried it a few years ago in high school.
Moderation Totals: Flamebait=2, Troll=1, Redundant=1, Insightful=6, Overrated=1, Underrated=1, Total=12. (not mine)
unless you like "reading the articles" :)
http://www.lenna.org/full/len_full.html/ (nudity)
You can do ATV legally in the US with NTSC, with a ham license.
You can see this the video for yourself, with stuff you have at home right now. There are cable channels that are on ham bands, but it's OK because their signals stay on the cable.
If you live in the SF ba area, hook a UHF antenna (vertically polarized) to your cable-ready TV or VCR with TV out, and tune to cable channel 57 (421.25 MHz), and aim it at Mt. Hamilton (east of San Jose).
Here are some tests on 1.2GHz, which is also a ham band.
'Nuff Said
EWW!
Hey editors, how about a NSFW warning on stories such as this!
[n8.r0n] http://petesweb.spymac.net/
'Nuff siaid
Here's some reading for you. It's only one page. You should be done in about a week.
e =CTLG&product_id=15-2572
http://www.radioshack.com/product.asp?catalog_nam
Guess their lawyers understand the DMCA better than yours.
...as we call it over here.
This only transmits, but does not encode the signal. What is outlined on this page is just the easy part.
It's not even full frontal. What kind of work do you have where they are that hard-ass?
Now can someone turn up the original photo that Tim Skelly used for the starfield in Star Castle... The stars are nice, but I'd like to see the actual photo he happened to have in the drawer to pick coordinates.
I'm interested in this, but I don't understand the practical implications (mainly because I have no idea what most of the acronyms mean). Does this mean I could plug my computer into my digital TV tuner somehow and be able to watch it on my TV? If so, does it work with US digital TV equipment (such as the Motorola set-top boxes that Comcast provides)?
Just hook everything up to the pc and let it do the conversion and display your video at the native resolution on your DTV.
it would be an MPEG2 encoded stream, not PAL nor NTSC ... the picture size and/or frame rate may be different but with any reasonable system you should be able to do exactly the same thing in the US
Can you all stop visiting lenna.org please? I'm trying to get me some nekid goodness and it's taking, like, forev-her. Though on a nostalgic note, it is rather like almost-ten-years ago...
I suspect we may start to see illegal broadcasts in 2007 in poorer urban neighborhoods of the USA.
With all broadcast television on VHF/UHF scheduled to cease on New Years Day 2007, there are going to be a lot of pissed off people who don't have cable getting nothing but static on every channel.
This is assuming that UHF/VHF broadcasting actually does go off the air Jan 1, 2007. It doesn't seem likely at this time, but it is mandated by the TeleCom Act of 1996. And one never knows what the current administration is going to do.
Let's assume that it does happen. All the middle-class people won't notice it because they are paying monthly cable fees and cable TV will not be affected by the VHF/UHF shutdown. However, let's assume that in poor neighborhoods the convertor boxes don't work well, or are prohibitively expensive, or are too technically complex for the general population. Suddenly there's no television.
Well politics abhors a vacuum. We may find ourselves in a situation where people simply start pirate broadcasting on the unused television channels. This will probably cause problems with the new uses of the spectrum (private cell phone communications, I believe). The FCC will be really busy trying to track down pirate TV stations. Pirate TV stations are rare now because they can't compete with broadcast network quality, and there are outlets on local cable access for speciality and non-professional broadcasters.
But with the UHF/VHF channels gone off the air, people will start filling it up with DVD broadcasts. Maybe even porn broadcasts. Unregulated, and without commercials. All illegal.
These channels could become political if there is an economic downturn or a return of conscription into the permanent, endless war that the administration has promised the defense contractors and campaign contributors. Alternative broadcasts of police beatings at demonstrations made by tiny CamCorders alternating with current Hollywood movies downloaded from the DarkWeb could become common content on the new pirate channels.
I wonder if anyone is considering the possibility of this happening before they decide to shut down UHF/VHF broadcasting in 2007?
A brief history of Lena. The page is worksafe, but if you wish to click, there are links to non-worksafe images of Lena over there.
"When the only tool you own is a hammer, every problem begins to resemble a nail." - Abraham Maslow (1908-1970)
What provides the Rshe had no fear
What Fabrice is telling us here is that he has managed to produce a real-time (or close-to-real-time) DVB-T/DVB-H software COFDM modulator, the output of which may be broadcast via the DAC converters of the video board. Given the complexity of the generated signal (more than 6000 subcarriers, not including pilot subcarriers which are used as beacons for the demodulator, and paying respect to the guard interval -- sorry for the technical gobbledygook), this usually requires a dedicated ASIC. Don't forget to include the preliminary phases of the encoding : creating an MPEG-2 video channel, an MEPG-2 transport stream (OK, he did it using a modified MPEG library), then encapsulate this into MPEG-2/DVB frames, add the Reed-Solomon code, perform the interleaving procedure, pour in some Viterbi encoding for redundancy, and feed it to the input of the DVB-T modulator, phew ! you're done.
I want to say hats off, ladies and gentlemen, to this outstanding performance. The Free Software movement definitely needs more guys like Fabrice, and we all need to encourage him into publishing more of his code.
Chapeau bas, mon cher Fabrice !
In Soviet Russia, our new overlords are belong to all your base.
is there any way I could use this to output video instead of still images? I would like to watch that DiVX flicks I have in my HD...
The slashdot effect + a nudie photo. Say goodbye to that server.
Given that the photograph of this nude model "Lenna", is the most used photograph used to test image compression algorithms, I think you intended the Photoshop audience to glaze over your post with no suspicsion. But to correctly raise the verry stenographical element, I believe you meant to type iNude and not nudie. Did you just make up that word? Is "nudie" even a word, or is it more hidden words to conceal your thoughts of "GNU DIE"? I think you are one of those Apple zealots...am I, for seeing it?
Here is the photo in dispute. Bring here down, bots errm I mean boys.
There's a small mention in the article about the PLL used for clocking in the 9200SE being capable of up to 400Mhz. If the DAC's could be run fast enough, the carrier could be generated directly and you would get a much stronger signal. Does someone have any details?
Any old ham will know that a computer can generate a TON of RFI (Radio Frequency Interference), and these brand new video cards generate so much RFI that building a faraday cage around the blasted thing just isn't enough!
We don't call it useful in any sense - we call it INTERFERENCE! Get your facts straight! And don't call me old geezer!
I think you mean ATSC
Get your Unix fortune now!
Yes, the signal is low power and won't get far, not nearly as far as the 80-meter ham transmitter I had as a kid who's second harmonic was picked up 800 miles away. But I wasn't trying to do that and quickly fixed the problem. You're deliberately trashing the spectrum for those around you who want to watch the real channel 5 or whatever. Show some responsibility and use a coax cable.
--Mike Perry, Seattle, Untangling Tolkien
inverters and fire a beam of neutrons into the main deflector dish.
*smile*
I'd hit it!
Sort of. But I dare you to do this with just a PC and a measly VGA board ;-)
In Soviet Russia, our new overlords are belong to all your base.
My housemate suspects that he's a front for a group of very talented coders, sort of like DVD Jon...
I think he's just a very clever Frenchman (*gasp* go all American right-wingers...)
When I opened up the image in GIMP, I could vaguely see two identical-looking images (only at 16% scaling though, the image being visible must have been an artifact of my laptop screen).
Assuming that the two copies are the first and second frames of one interlaced tv frame, then we are talking about 4096 x 2048 x 8 bits = 8388608 megabytes of data to generate one tv frame.
For motion picture, at 25 interlaced frames per second, thats just under 210 megabytes of data you'd have to move every second. And, moved with enough consideration to timing that you're not wiping out a frame while it's being drawn.
We can take into account that there is overscan, vsync and hsync 'signal' that doesn't need to be refresh each scan, which might eliminate some data requirements for refreshing, it's still going to be a fair bit of data.
Is that feasible?
(or am I wrong about 1 VGA frame being 1 PAL image?)