GRZipII <e|d> InputFile OutputFile <Switches>
GRZipII <e|d> InputFile OutputFile <Switches>
<Switches>
-p Disable all Preprocessing techniques
-m<mode> Compression algorithms, default: -m1
-m1 LZP + BWT + WFC + EC
-m2 LZP + BWT + MTF + EC
-m3 LZP + ST4 + WFC + EC
-m4 LZP + ST4 + MTF + EC
-S Use alternative BWT Sorting algorithm
(faster for repetitive blocks)
English/Russian Text: -pm1 Dictionary: -pm3 WinWord/WinExcel file: -Spm1 OS/2 ini file: -Spm1 C-sources: -Spm1 EXE: -pm1
GRZipII, is yet another BSLDCA compressor.
NB, bzip2 is the most well-known BSLDCA compressor. It uses BWT ` MTF ` Huffman algorithm.
GRZipII is a high-performance file compressor. It uses the Block-Sorting Lossless Data Compression Algorithm (BSLDCA), which has received considerable attention over recent years for both its simplicity and effectiveness.
To top all this off, the program appears to be free, and there are DOS, Windows, and Linux ports all available at the link given below.
GRZipII is based on Burrows-Wheeler Transform (BWT), Schindler Transform (ST4), Move-To-Front (MTF) and Weighted Frequency Counting (WFC) algorithms.
This implementation has compression rate of 2.234 bps on the Calgary Corpus(14 files) without preprocessing.
http://magicssoft.ru/?folder=projects&page=GRZipII
grzip e readme.txt readme.grz cat readme.txt | gzip > readme.gz cat readme.txt | bzip2 > readme.bz2
1004 Nov 26 11:00 readme.bz2 955 Nov 26 10:59 readme.grz 958 Nov 26 10:59 readme.gz 1810 Nov 9 08:27 readme.txt*