Re: A little compression...

["Sam Hobbs" <samuel@social.rr.com_change_social_to_socal>]

> "Harry Potter" <maspethrose7@aol.com> wrote in message
> eb22bc00-9ad0-4fd5-8f54-e8cb1e14c1b0@z72g2000hsb.googlegroups.com">news:eb22bc00-9ad0-4fd5-8f54-e8cb1e14c1b0@z72g2000hsb.googlegroups.com...
> On May 23, 7:49 am, Dean Earley <dean.ear...@icode.co.uk> wrote:
> > How does it compare to bzip, lzma and the 7zip supported schemes?
>
> I need to test them, but I am not finished.  Where can I get these
> compression ratios?  I have 7-zip and WnRAR.  I also have WinZip, but
> it stopped working, as the shareware version I have ran out.

I would search the internet for the various algorithms. As far as I know, 
WnRAR is not an algorithm; it is software that uses various algorithms, 
usually or always just one at a time. A format that it commonly uses is the 
RAR format that is well documented in Unix documentation but (I am nearly 
sure) it is not a compression algorithm; it is an archiving (backup) format.

WinZip also is not an algorithm; it is also software that uses various 
algorithms, but it's most common algorithm that it uses is the pkzip 
algorithm (I am not sure if that is the official name). It is a proprietary 
format but I think there is sample code for it available in sites such as 
programming sites.

There have been articles written about compression algorithms with extensive 
comparisons and evaluations and such. You should find those articles and 
wherever you find them, that is where you should ask your questions. The 
IEEE (ieee.org?) is a good place for such things. If you search the 
newsgroups you can find a more appropriate place to ask your questions.