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| Compression Algorithms by Mark Nelson |
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| apes007 |
 Posted: Mon Jan 26, 2004 1:21 pm Post subject: Compression Algorithms by Mark Nelson |
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Hi! I am in my fourth year of electrical engineering and I am studying lossless compression routines for my thesis. I have downloaded the compression algorithms by Mark Nelson and they are very well written but i have one problem: I was wondering if the output file (from compression) is written in ascii format. I know that there is a bit i/o file, but the characters that come out look a little unregular. Please help! It would really help in my research endevors!
Thanks apes007  |
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| RogerLacroix |
| Posted: Tue Jan 27, 2004 7:49 am Post subject: |
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Jedi Knight
Joined: 15 May 2001
Posts: 3253
Location: London, ON Canada
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Hi,
Boy, were you digging around on my web site. 
I have tested those compression routines on Windows, Unix and the mainframe. The output is not, per say, ASCII.
On Windows & Unix the input may be ASCII data but the output is a binary representation of the compressed input. Like wise, if you compression an executable file from Windows or Unix (this is not ASCII data) then you get a binary representation of the compressed input.
Similarly, on the mainframe, the input may be EBCDIC data but the output is a binary representation of the compressed input. Like wise, if you compression an executable file from the mainframe (this is not EBCDIC data) then you get a binary representation of the compressed input.
I am not a compression theorist. I would strongly suggest that you read some of Mark's papers at:
http://datacompression.info/index.shtml
Or visit his home page at:
http://www.marknelson.us/
Regards,
Roger Lacroix
Capitalware Inc.
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