You've mischaracterized what they have done. Their work is based on the
assumption that
many files are mostly the same, with some slight differences. For example,
with mp3 files,
the ID3 headers may differ, but the encoded song is the same. This occurs
less frequently
in mpeg/avi files than mp3s, according to their measurements, but perhaps
frequently enough
to support more potential sources of data for multi-source downloading, with
the hope of saturating
a user's download bandwith.
-Robert
From: Lemon Obrien <[EMAIL PROTECTED]>
Reply-To: theory and practice of decentralized computer networks
<[EMAIL PROTECTED]>
To: theory and practice of decentralized computer networks
<[EMAIL PROTECTED]>
Subject: RE: [p2p-hackers] Computer scientists develop P2P system
thatpromisesfaster music, movie downloads
Date: Thu, 12 Apr 2007 11:46:56 -0700 (PDT)
this won't work in the real world b/c even if you solved the problem of
"similariy" knowing different files are really the same piece of music; but
once you ownloaded it, media players would have to read what was created
and translate it. Different encoders encode differently;
but, then there is things like bit-rate for mp3s, etc...say the first
part of my mp3 is encoded at a high bit-rate interleaved with low-bit rate
encoded data; now, write the mp3 player to handle that.
This also could not be used in comerce b/c people want high-quality,
loss-less, media, they're paying for it; while this would return on
"similar" which says to the customer, "well, I know what you want, but you
have to take what you get."
lemon
David Barrett <[EMAIL PROTECTED]> wrote:
I'm not sure this would work in the real world.
Even a movie with different translations would have non-matching 16KB
chunks
because audio and video frames are interleaved. Unless you have separate
audio/video channels, I don't see how this would ever work.
Furthermore, different rips of the same CD track are likely not identical
unless the codec happens to be exactly the same. (Is this true? I'm not
sure if there is homogeny between MP3 encoders.)
As for software packages, the contained files are generally compressed,
throwing off all similarity. And even if not compressed, unless they are
perfectly byte aligned (a 1 in 65536 chance), they won't match up.
So I just don't see how this would work in the real world. Am I
misunderstanding it?
-david
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:p2p-hackers-
> [EMAIL PROTECTED] On Behalf Of FabrÃcio Barros Cabral
> Sent: Wednesday, April 11, 2007 1:46 PM
> To: [EMAIL PROTECTED]
> Subject: [p2p-hackers] Computer scientists develop P2P system that
> promisesfaster music, movie downloads
>
> A Carnegie Mellon University computer scientist says transferring large
> data files, such as movies and music, over the Internet could be sped up
> significantly if peer-to-peer (P2P) file-sharing services were
> configured to share not only identical files, but also similar files.
>
> http://www.physorg.com/news95436100.html
>
> []'s
>
> --fx
>
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> p2p-hackers mailing list
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You don't get no juice unless you squeeze
Lemon Obrien, the Third.
http://www.tamago.us
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