3 ms·

Interesting worst case scenario. (Random thought) Encoding data inside video streams might give more bandwidth, as chat msgs seem to be heavily throttled.

by xtacy 15y ago

xxbondsxx 15y ago
Good idea! That would definitely require ripping open the plugin or compiling your own (and swapping it out when the page is loaded), but it would certainly enable a ton more bandwidth. I was really impressed when I first saw this image stenography on the Wikipedia article: http://en.wikipedia.org/wiki/Steganography#Digital_steganography http://en.wikipedia.org/wiki/Steganography#Digital_steganogr... If you couldn't inject your own code into the chat plugin (or had trouble faking the packets from your own), you could do the extremely low-tech solution of videochatting a screen of a slowly-changing QR code. It would make encoding super simple and still allow for a decent amount of bandwidth transmission :D Damnit! That's a good idea. 3k bytes per QR code, a conservative estimate of 15 fps, and you are at decent 45k a second with no code injection!
- gresrun 15y ago
  You could fit many QR codes on screen at a time. Or, better yet, you could just send raw pixels as bits, white = 0, black = 1. With 1024x768 HD video, that's a possible 768K/Frame => 22.5M/s @ 30 FPS!
  - X4 15y ago
    Fun I had a similar idea on April this year, I thought about using streaming png's (nodejs) as information source, first I was thinking about using some qr-code technique to make transmissions secure. Then I thought, I could use something better like qr-code multiplication inside of a png stream that looks like a video with some qr-codes that flash from time to time. A smart-phone application would make the data readable again (decryption). You would need to whisper a secret key personally into your friends ear, so he can enter the sequence into his smartphone app. All-in-all it was a concept to use png's like videos with "cut-scenes" a-like qr-code's that get multiplied and cross-checksummed afterwards. Might sound stupid, but think about it. I wasn't approaching to solve your post-apocalyptic scenario, but to make something speedier+secure than wifi/bluetooth/infrared. What do you think? A friend who's exceptional at maths (I'm not) told me it's not possible, however I don't like when naysayers come and tell it's impossible. Still it demotivated me. Do you think it's possible? Explained in two words: "Optical Transmission"
    - X4 15y ago
      I saw a friend doing a transaction, that inspired me. Here's a video to it: http://www.youtube.com/watch?v=GOQeZGe83YM http://www.youtube.com/watch?v=GOQeZGe83YM
  - philh 15y ago
    Are there any lossless video formats in common use? One is unlikely to be introduced if not, so you might need a lot more than one pixel/bit. But at the same time, you don't need to limit to black-and-white. Even just black/white/red/green/blue/purple/yellow/turquoise would be four times as much bandwidth, and I would be very surprised if even lossy video couldn't reliably distingish up to 64 colours. I don't think many people currently have 22.5M/s download speeds anyway, so it's probably not a big deal.
- ontoillogical 15y ago
  People used to do this way back when. Here's a video from a 90's TV show called NetCafe. At some point they take a break to stream some downloads to the viewers. They ask you to plugin their TV Modem to get some random shareware. Then they show a screen with a rapidly animated 2d barcode for a couple minutes. http://www.archive.org/details/nc101_hackers http://www.archive.org/details/nc101_hackers I wonder how many people actually owned a TV modem. It had to be a tiny market. By the way, I highly recommend watching the episode, they interview Aleph One and some other old-school hackers.
  - xxbondsxx 15y ago
    Wowwww this is amazingly old school. Talk about time travel. That "download blast" section looks like it has a significant amount of bandwidth though. It's cool to see the idea implemented though

Interesting worst case scenario. (Random thought) Encoding data inside video streams might give more bandwidth, as chat msgs seem to be heavily throttled.

by xtacy 15y ago

Interesting worst case scenario. (Random thought) Encoding data inside video streams might give more bandwidth, as chat msgs seem to be heavily throttled.

xxbondsxx 15y ago

Good idea! That would definitely require ripping open the plugin or compiling your own (and swapping it out when the page is loaded), but it would certainly enable a ton more bandwidth. I was really impressed when I first saw this image stenography on the Wikipedia article: http://en.wikipedia.org/wiki/Steganography#Digital_steganography http://en.wikipedia.org/wiki/Steganography#Digital_steganogr... If you couldn't inject your own code into the chat plugin (or had trouble faking the packets from your own), you could do the extremely low-tech solution of videochatting a screen of a slowly-changing QR code. It would make encoding super simple and still allow for a decent amount of bandwidth transmission :D Damnit! That's a good idea. 3k bytes per QR code, a conservative estimate of 15 fps, and you are at decent 45k a second with no code injection!

gresrun 15y ago
You could fit many QR codes on screen at a time. Or, better yet, you could just send raw pixels as bits, white = 0, black = 1. With 1024x768 HD video, that's a possible 768K/Frame => 22.5M/s @ 30 FPS!
- X4 15y ago
  Fun I had a similar idea on April this year, I thought about using streaming png's (nodejs) as information source, first I was thinking about using some qr-code technique to make transmissions secure. Then I thought, I could use something better like qr-code multiplication inside of a png stream that looks like a video with some qr-codes that flash from time to time. A smart-phone application would make the data readable again (decryption). You would need to whisper a secret key personally into your friends ear, so he can enter the sequence into his smartphone app. All-in-all it was a concept to use png's like videos with "cut-scenes" a-like qr-code's that get multiplied and cross-checksummed afterwards. Might sound stupid, but think about it. I wasn't approaching to solve your post-apocalyptic scenario, but to make something speedier+secure than wifi/bluetooth/infrared. What do you think? A friend who's exceptional at maths (I'm not) told me it's not possible, however I don't like when naysayers come and tell it's impossible. Still it demotivated me. Do you think it's possible? Explained in two words: "Optical Transmission"
  - X4 15y ago
    I saw a friend doing a transaction, that inspired me. Here's a video to it: http://www.youtube.com/watch?v=GOQeZGe83YM http://www.youtube.com/watch?v=GOQeZGe83YM
- philh 15y ago
  Are there any lossless video formats in common use? One is unlikely to be introduced if not, so you might need a lot more than one pixel/bit. But at the same time, you don't need to limit to black-and-white. Even just black/white/red/green/blue/purple/yellow/turquoise would be four times as much bandwidth, and I would be very surprised if even lossy video couldn't reliably distingish up to 64 colours. I don't think many people currently have 22.5M/s download speeds anyway, so it's probably not a big deal.
ontoillogical 15y ago
People used to do this way back when. Here's a video from a 90's TV show called NetCafe. At some point they take a break to stream some downloads to the viewers. They ask you to plugin their TV Modem to get some random shareware. Then they show a screen with a rapidly animated 2d barcode for a couple minutes. http://www.archive.org/details/nc101_hackers http://www.archive.org/details/nc101_hackers I wonder how many people actually owned a TV modem. It had to be a tiny market. By the way, I highly recommend watching the episode, they interview Aleph One and some other old-school hackers.
- xxbondsxx 15y ago
  Wowwww this is amazingly old school. Talk about time travel. That "download blast" section looks like it has a significant amount of bandwidth though. It's cool to see the idea implemented though