Re: Data compression

From: Doug Ewell (
Date: Thu May 05 2005 - 00:23:38 CDT

  • Next message: Elliotte Harold: "Re: Data compression"

    N. Ganesan <naa dot ganesan at gmail dot com> wrote:

    > May be if engineers here work with Arvind Thiagarajan,
    > a Tamil engineer, now in Singapore, they can compress
    > Unicode few orders of magnitude higher ?!

    As Philippe wrote, (a) SCSU can compress Tamil text into one byte per
    character, plus a constant overhead of two bytes for the *entire* text,
    and (b) general-purpose data compression can always be applied to text
    to achieve better compression, if you don't mind losing the ability to
    process the data as text.

    Image data, such as the medical images described in the article, is well
    known for being highly compressible. The trick is in finding the right
    algorithm for the specific type of image. Not all algorithms work
    equally well on all types of data.

    For more on compression of Unicode text, have a look at Unicode
    Technical Note #14.

    Doug Ewell
    Fullerton, California

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