Xref: utzoo trial.misc.legal.software:26 gnu.misc.discuss:1378 Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!rutgers!bellcore-2!envy!karn From: karn@envy.bellcore.com (Phil R. Karn) Newsgroups: trial.misc.legal.software,gnu.misc.discuss Subject: Re: LZW and shareware wars Message-ID: <1990Aug2.200440.7101@bellcore-2.bellcore.com> Date: 2 Aug 90 20:04:40 GMT References: <1990Jul31.220935.1424@riacs.edu> <1990Aug2.082147.10682@Solbourne.COM> Sender: usenet@bellcore-2.bellcore.com (Poster of News) Reply-To: karn@thumper.bellcore.com Organization: Packet Communications Research Group (Bellcore) Lines: 13 PKZIP also makes use of a new compression scheme Katz calls "implosion", and it seems to do much better than his LZW implementation in PKARC. It even seems to outdo tar+compress under UNIX, which is remarkable given the PC's limited memory and PKZIP's compression of individual files. Does anybody know how "implosion" works, and whether it might be an alternative to LZW? It would be pretty satisfying to tell Unisys to take a hike because we've found a more efficient algorithm that's public domain... Phil