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Class: BWT & MTF encoder


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  Classes of Robin Schuil  >  BWT & MTF encoder  >  Download  >  Support forum Support forum  >  Blog Blog  >  RSS 1.0 feed RSS 2.0 feed Latest changes  
Name: BWT & MTF encoder Support forum
Base name: bwt
Description: Compress and decompress data using BWT and MTF
Related top rated classes: , , ,
Version: -
Required PHP version: 4.1.0
License: GNU General Public License (GPL)
All time users: 562 users
All time rank: 3453
Week users: 2 users
Week rank: 3015
 
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Author

Picture of Robin Schuil
Name: Robin Schuil <e-mail contact>
Published packages: 3 Browse this author's classes Browse this author's classes
Country: The Netherlands The Netherlands - PHP jobs in The Netherlands
Home page: http://lunchpauze.blogspot.com/
Age: 26
All time rank: 928
Week rank: 921

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.

User ratings

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All time:
Not sure (58.3%)
Good (91.7%)
-
Good (91.7%)
-
-
Not sure (47.5%)
1461
Month:
Not yet rated by the users

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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