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- Path: sparky!uunet!crdgw1!rdsunx.crd.ge.com!ariel!davidsen
- From: davidsen@ariel.crd.GE.COM (william E Davidsen)
- Newsgroups: comp.compression
- Subject: Re: Compression technique mentioned in PCW
- Message-ID: <1992Aug19.123704.29528@crd.ge.com>
- Date: 19 Aug 92 12:37:04 GMT
- References: <1992Aug18.155518@sees.bangor.ac.uk> <1992Aug18.173306.742@news.uiowa.edu>
- Sender: usenet@crd.ge.com (Required for NNTP)
- Reply-To: davidsen@crd.ge.com (bill davidsen)
- Organization: GE Corporate R&D Center, Schenectady NY
- Lines: 30
- Nntp-Posting-Host: ariel.crd.ge.com
-
- In article <1992Aug18.173306.742@news.uiowa.edu>, williams@herky.cs.uiowa.edu (Kent Williams) writes:
-
- | This sounds like arithmetic compression. Some people who don't care about
- | compression time or memory usage have come up with really effectic arithmetic
- | compressors.
-
- There are applications for which the effort to compress is not
- important, as long as it is possible. These usually involve
- distributions. For example, when I distributed comp.binaries.ibm.pc, zoo
- was chosen as the compressor because it did a better job than zip in
- terms of the output fileszie. The same would hold true for a vendor
- distributing commercial software on floppy, where the savings of one
- disk can be a significant reduction in production, storage and shipping
- costs.
-
- Packing files for distribution on a BBS is another example, although
- many sites there have elected to use zip because of the speed advantage
- over zoo/lha. The BBS has no incentive to make the file a little
- smaller, because the cost are not bourne by the system doing the
- compression.
-
- Usenet news is still using compress because it's fast, and because
- major feeds are usually done uncompressed over WAN. Feeds to small
- systems by phone are often done over modems at least 4x faster than were
- in use three years ago, and the compression in the modems is such that
- it may be easier to run the feed uncompressed, if disk space permits.
-
- --
- bill davidsen, GE Corp. R&D Center; Box 8; Schenectady NY 12345
- I admit that when I was in school I wrote COBOL. But I didn't compile.
-