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Class: BWT & MTF encoder


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      Classes of Robin Schuil  >  BWT & MTF encoder  >  Download  >  Support forum Support forum  >  RSS 1.0 feed RSS 2.0 feed Latest changes  >  Stumble It! Stumble It!  >  Bookmark in del.icio.us Bookmark in del.icio.us  
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  • Supplied by:

    Picture of Robin Schuil
    Name: Robin Schuil <e-mail contact>
    Published packages: 3
    Country: The Netherlands The Netherlands - PHP jobs in The Netherlands
    Home page: http://lunchpauze.blogspot.com/
    Age: 25
    All time rank: 922
    Week rank: 843

    Browse this author's classes

  • Innovation Award:

    PHP Programming Innovation award nominee
    December 2006
    Number 6
    		 bzip2 is a compression program that achieves great data compression ratios.

    PHP provides an extension that can implement bzip2 compression. However, that extension is not always available in all PHP distributions.

    This class implements BWT and MTF data transformation algorithms that area also used by the bzip2 program. The class may be used to implement bzip2 like compression when the bzip2 extension is not available.

    Manuel Lemos

  • Groups:

    Group folder image Algorithms Numerical and statistical algorithms View top rated classes
    Group folder image Compression Data compression and file archive manipulation View top rated classes

  • Detailed description:

    This package can be used to compress and uncompress data using the Burrows-Wheeler transform (BWT) and Move-To-Front (MTF) encoder.

    These data processing algorithms are commonly used in compression schemes employed by the bzip2 program.

    Each of these algorithms are implemented in separate classes and do not require any special PHP extensions.

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  • Applications that use this class:

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  • Files:

    File Role Description
    Plain text file bwt.class.php Class Burrows-Wheeler transform
    Plain text file mtf.class.php Class Move-To-Front encoder
    Plain text file example.php Example Example usage
    Download all files: bwt.tar.gz bwt.zip
    NOTICE: if you are using a download manager program like 'GetRight', please Login before trying to download this archive.

 
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