Date: Tue, 18 Mar 1997 16:26:16 +0800 (GMT)
From: Orlando Andico <orly AT gibson DOT eee DOT upd DOT edu DOT ph>
To: Benjamin D Chambers <chambersb AT juno DOT com>
cc: djgpp AT delorie DOT com
Subject: Re: Problems using allegro
In-Reply-To: <19970315.211912.7879.7.chambersb@juno.com>
Message-ID: <Pine.SGI.3.93.970318162440.8553A-100000@gibson.eee.upd.edu.ph>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

On Sun, 16 Mar 1997, Benjamin D Chambers wrote:

> 
> On Sun, 16 Mar 1997 03:19:16 +0100 Francois Charton
> <deef AT pobox DOT oleane DOT com> writes:
> >Mark T Logan wrote:
> >> 
> >> has targa support(as of 2.2).  I agree that GIF and JPG would be 
> >good,
> >> but I
> >> know nothing about these formats except that GIF uses LZH, or 
> >whatever
> >> that algorithm is called.  Same one as PKZIP uses.  
> >
> >GIF uses LZW as its compression algorithm. PKZIP uses LZSS, which is 
> >not 
> >the same at all (though it was invented by the same two researchers, 
> >Lempel and Ziv, hence the name similarity).
> Wasn't LZW Lempel-Ziv-Welsh?  (I can never remember their names, but at
> least I know what they start with :)
> 
> ...Chambers
> 

LZW=lempel ziv welch

Welch was this fellow at Unisys who published a paper on his mods to the
LZ77 algorithm (which is the one used by GZIP btw) and took out a patent.
that's what's causing all the LZW trouble these days -- Unisys wants YOU
to pay them $$$ for the use of LZW. That's why the FSF uses JPEG's instead
of GIF's in their web pages -- GIF's ain't free anymore.

-----------------------------------------------------------------------
Orlando Andico                               IRC Lab/EE Dept/UP Diliman
email: orly AT gibson DOT eee DOT upd DOT edu DOT ph          http://gibson.eee.upd.edu.ph