Article View: alt.comp.compression
Article #16Re: Trying to get maximum compression
From: Dik T. Winter
Date: Mon, 25 Mar 1991 00:14
Date: Mon, 25 Mar 1991 00:14
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1616 bytes
> shaw@pegasus.com (Sandy Shaw) writes: > > >I am trying to get the maximum compression possible of the following > >32 byte hex file(in ASC): > > >f3e9 ec5c 8bec ecdb ece9 ec12 ec3f ecec > >0cbb 8bec 5cdb ecdb 5c9c bbec 8bdb 9cec > > >The best results I get are using the compact utility(adaptive Huffman). This > >gives 21.88% compression or 7 bytes saved. Does anyone out there have a > >scheme that can improve on this? > Well, if it is a HEX file, why don't you try to compress it by taking two > bytes and putting them into one byte (range 0-255)? But even if those are just 32 bytes, you can compress it to zero bytes with a general compression/decompression program (specialized for this case of course). (E.g. if the compressed file is empty the original were those 32 bytes; if the (only) byte is 0, the original was empty, otherwise it is output from compress. This expands slightly on empty files of course.) But I do not think that was the intention. So what is the real problem? -- dik t. winter, cwi, amsterdam, nederland dik@cwi.nl
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!spool.mu.edu!uunet!mcsun!hp4nl!charon!dikReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!spool.mu.edu!uunet!mcsun!hp4nl!charon!dik From: dik@cwi.nl (Dik T. Winter) Newsgroups: alt.comp.compression,comp.compression Subject: Re: Trying to get maximum compression Message-ID: <3212@charon.cwi.nl> Date: 25 Mar 91 00:14:48 GMT Article-I.D.: charon.3212 References: <1991Mar24.152106.6333@pegasus.com> <a+5fs#b@rpi.edu> Sender: news@cwi.nl Followup-To: alt.comp.compression Organization: CWI, Amsterdam Lines: 23