Path: utzoo!utgpu!water!watmath!watdcsu!ttims
From: ttims@watdcsu.waterloo.edu (Tracy Tims)
Newsgroups: comp.dcom.modems
Subject: Re: need help with xenix Kermit to PC procomm (now 8-bit encoding)
Summary: Even higher efficiency is possible
Message-ID: <5003@watdcsu.waterloo.edu>
Date: 26 Aug 88 20:16:18 GMT
References: <20302@neabbs.UUCP> <11744@oberon.USC.EDU> <6729@bigtex.uucp> <2906@ucdavis.ucdavis.edu> <2315@munnari.oz>
Reply-To: ttims@watdcsu.waterloo.edu (Tracy Tims)
Organization: U. of Waterloo, Ontario
Lines: 12

I have an encoder/decoder that encodes to base 80, and manages to get a 1:1
compression ratio (or slightly better!) for text.  On a stripped binary for
vi on a Sun, it expands the file by 10%.  It's worse on LZ output, but compress
works very well on its output, since my encoder doesn't mangle substrings much.

It's based on a previous encoder designed here at Waterloo.  It is the heart
of a network transmission archiver/format I am designing.

It's possible to encode to printable characters much more efficiently than
the bit-shifting and stuffing algorithms can.

Tracy Tims