How about http://marknelson.us/1989/10/01/lzw-data-compression/ ?
Bill On Tue, 19 Feb 2008 08:11:36 -0600, Rick Fochtman <[EMAIL PROTECTED]> wrote: >Good morning, all. It's 4 degrees and dead calm here in greater >ChicagoLand, aka The Kingdom of Daley. > >Could someone point me to a fairly readable description of the LZW >compression algorithm? > >I'm planning to unbutton ARCHIVER (CBT File 147) and will be considering >the replacement of the current Huffman tree compression with LZW, if I >can code it to be more efficient in Assembler. I've been told by several >users that while the compression seems fairly quick, the "uncompression" >seems to be rather CPU intensive. Before anyone goes looking, please >remember that I wrote that code years ago, under MVS SP1.3. I've also >found that some load module records grow, rather than shrink, when I >apply the Huffman compression technique to them, resulting in ABENDs. > >For those that use ARCHIVER, the transition will be transperant; There >are some flag fields that I can use for decision making in existing >ARCHIVE records. > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
