Mailing List Archive: 49091 messages
  • Home
  • Script library
  • AltME Archive
  • Mailing list
  • Articles Index
  • Site search
 

[ALLY] Compresssion

 [1/7] from: ptretter:norcom2000 at: 17-Apr-2001 9:47


I finally found a way to compress a 650meg file to under 2k. Hope to have working program in REBOL/View/Pro 1.1. As soon as we get runtime and additionally license information, I hope to distribute the program. So how many CD's would you like to carry around with you on a floppy disk? :) Some of you guys from the IRC REBOL channel know I have been working on that for some time - thanks for your input these last few months. Paul Tretter

 [2/7] from: rryost:home at: 17-Apr-2001 11:06


This has been an interesting discussion, but compressing by large ratios depends on the amount of "information" in the source file. As an extreme, consider a photo of President Lincoln. Nearly everyone remembers such a photograph, so how much "information" is there in a photo file of the photograph? Not very many bits would be needed to drag the picture from ones memory! If the source file is pure random, and you want to recover the exact sequence of 1's and 0's from the compressed file, I'm pretty sure it wont compress much! This is not to put doubt on Tretter's work. Many visual/audio files have little info and can compress by large ratios, in principle. Russell [rryost--home--com] ----- Original Message ----- From: "Paul Tretter" <[ptretter--norcom2000--com]> To: "[Ally-List--Rebol--Com]" <[ally-list--rebol--com]> Sent: Tuesday, April 17, 2001 7:47 AM Subject: [ALLY] Compresssion
> I finally found a way to compress a 650meg file to under 2k. Hope to have
working program in REBOL/View/Pro 1.1. As soon as we get runtime and additionally license information, I hope to distribute the program. So how many CD's would you like to carry around with you on a floppy disk? :) Some of you guys from the IRC REBOL channel know I have been working on that for some time - thanks for your input these last few months.

 [3/7] from: holger:rebol at: 17-Apr-2001 11:11


On Tue, Apr 17, 2001 at 09:47:15AM -0500, Paul Tretter wrote:
> I finally found a way to compress a 650meg file to under 2k. Hope to have working program in REBOL/View/Pro 1.1.
I remember claims like that being made on Usenet some ten years ago, and it was funny for a while how people without a solid background in information theory actually believed it for some time. Eventually the interest wore off though. Recycling that old joke now, well after April 1st, seems pointless to me. Anyone REALLY interested in state of the art data compression should have a look at the proceedings of the IEEE Data Compression Conference of the last few years, available at most college or university libraries. -- Holger Kruse [holger--rebol--com]

 [4/7] from: chris:ross-gill at: 17-Apr-2001 14:12


Hi Paul,
> I finally found a way to compress a 650meg file to under 2k. Hope > to have working program in REBOL/View/Pro 1.1. As soon as we get > runtime and additionally license information, I hope to distribute > the program. So how many CD's would you like to carry around with > you on a floppy disk? :)
Does that include *any* 650M? Specifically, an audio or video stream? You say its a slow compression method, so it wouldn't be practical for digital movies, but for the purposes of archiving... - Chris

 [5/7] from: doug:vos:eds at: 17-Apr-2001 14:27


Are if you want a very powerful image compression you can actually buy and use today... check out http://www.lizardtech.com/index.html This provides 10 times compression of jpeg (not 1000 times) but at least you can buy it today.

 [6/7] from: petr::krenzelok::trz::cz at: 17-Apr-2001 20:09


----- Original Message ----- From: "Paul Tretter" <[ptretter--norcom2000--com]> To: "[Ally-List--Rebol--Com]" <[ally-list--rebol--com]> Sent: Tuesday, April 17, 2001 4:47 PM Subject: [ALLY] Compresssion
> I finally found a way to compress a 650meg file to under 2k. Hope to have
working program in REBOL/View/Pro 1.1. As soon as we get runtime and additionally license information, I hope to distribute the program. So how many CD's would you like to carry around with you on a floppy disk? :) Some of you guys from the IRC REBOL channel know I have been working on that for some time - thanks for your input these last few months.
> Paul Tretter
Paul - what kind of mushrooms did you swallowed? Psylocibin rules! :-)) (although I never tried it :-) -pekr-

 [7/7] from: allenk:powerup:au at: 19-Apr-2001 7:18


The only methods I can think of that have potential for that much reduction are recursive keyed sequence generators, which tend to be slow and requires a large database for the client side. But I am certainly curious to see what you have come up with, get your patent in first before you post. Cheers, Allen K