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- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!spool.mu.edu!agate!agate!usenet
- From: dawson@cs.cornell.edu (Dawson Dean)
- Newsgroups: comp.archives
- Subject: [comp.sys.mac.programmer] Best text compression
- Followup-To: comp.sys.mac.programmer
- Date: 6 Sep 1992 08:25:12 GMT
- Organization: Cornell Univ. CS Dept, Ithaca NY 14853
- Lines: 81
- Approved: adam@soda.berkeley.edu
- Distribution: world
- Message-ID: <18cf98INNmpl@agate.berkeley.edu>
- References: <1992Sep4.150216.26146@cs.cornell.edu>
- NNTP-Posting-Host: soda.berkeley.edu
- X-Original-Newsgroups: comp.sys.mac.programmer
- X-Original-Date: Fri, 4 Sep 1992 15:02:16 GMT
-
- Archive-name: auto/comp.sys.mac.programmer/Best-text-compression
-
-
- I sent a message to the original poster last night, but it must
- have bounced cuz I havent seen it on the net. Then, I see
- everyone saying how swell Huffman is and I've got to put in
- my own 2 cents. Its been my experience that a good lzw implementation
- blows away Huffman and the best public domain lzw I know of is
- built by Ross Williams, and is called lzrw. There are 5 versions
- that have different speed/compression tradeoffs, but all are great.
-
- You can ftp these from sirius.ucs.adelaide.edu.au or check archie
- for other archives. Plus, check out comp.compression and
- comp.compression.research, for the latest scoop from many people
- (including Ross Williams) who know lots more about this stuff
- than me.
-
- Here is the readMe from the lzrw release....
- ----------------
- DATA COMPRESSION DIRECTORY
- ==========================
- Date : 04-Apr-1992.
- Author : Ross Williams (ross@spam.ua.oz.au)
-
- This file gives an overview of the data compression directory of the
- anonymous ftp archive located at the University of Adelaide, South
- Australia. The exact location of the directory is:
-
- Machine : sirius.itd.adelaide.edu.au [IP=129.127.40.3]
- Directory : pub/compression
-
- The directory mostly contains public domain data compression
- algorithms developed by Ross Williams during early 1991. It also
- contains one or two other items of interest.
-
- The files in this directory may be compressed. Files that are
- compressed will have names terminating with ".Z" and will have to be
- uncompressed before use (using the Unix "uncompress" command). I
- wouldn't trust my files to a data compression algorithm :-), but the
- system programmer who put the files there for me (I do not have direct
- control over this archive) seems to think that it is a good idea.
-
- Ross Williams
- 21-Aug-1991
-
- 0readme - This descriptive file.
- dc_stan_just - Justification of dc_stan_spec.
- dc_stan_spec - Proposal for data compression interface standard.
- dc_stan_stream - Revised proposed standard.
- dcc91_report - Report on 1991 Data Compression Conference.
- fast_copy.68000 - Fast block move routine for 68000 microprocessor.
- lzrw1-a.68000 - LZRW1-A algorithm implemented in 68000 assembler.
- lzrw1-a.c - LZRW1-A algorithm implemented in C
- lzrw1-a.txt - Release notes for LZRW1-A algorithm.
- lzrw1.68000 - LZRW1 algorithm implemented in 68000 assembler.
- lzrw1.c - LZRW1 algorithm implemented in C.
- lzrw1.tex - DCC91 conference paper describing LZRW1 algorithm.
- lzrw2.c - LZRW2 algorithm implemented in C.
- lzrw2.txt - Release notes for LZRW2 algorithm.
- lzrw3-a.c - LZRW3-A algorithm implemented in C.
- lzrw3-a.txt - Release notes for LZRW3-A algorithm.
- lzrw3.c - LZRW3 algorithm implemented in C.
- lzrw3.txt - Release notes for LZRW3 algorithm.
- lzrw4.txt - Description of LZRW4 algorithm (not yet implemented).
- lzrw45_covering - Release notes for LZRW4 and LZRW5 descriptions.
- lzrw5.txt - Description of LZRW5 algorithm (not yet implemented).
- lzrw_headers.h - Header files (.h files) for C code.
- puzzlebox_provpatent - Provisional patent for puzzle box.
- rw_info - Information about Ross Williams and his activities.
-
- WARNING: A patent has recently arisen that may cover one or more of
- these algorithms. Please refer to the file rw_info for more
- information.
-
- --<End of 0readme file for the compression directory>
- --
- ******************************************************************
- Dawson Dean Internet: dawson@cs.cornell.edu
- Dept. of Computer Science Office: (607) 255-1179
- Cornell University
-
-