<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2800.1458" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>I did do one demo at MIT in 1996; </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Also while I am not willing to bring floppies in
and do a public demo; I have offered to show certain BLU folks a demo, off-line
from a meeting, to video tape the demo, and then to show the video tape at a BLU
meeting.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I don't know yet whether the people I am talking to
will agree to this -- and won't know until next week or later, (at least this is
my best information at this moment.)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Also, you guys should simply build the model I
described. IT COMPRESS'ES. It's not powerful and it's not efficient,
but it works.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Let me try and show you why, because apparently
some participants here have a little trouble understanding basic vector
algebra.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>First, the client vector (the original buffer) is
random; that won't produce much of value when curve-fit.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Now, building the monotonic vector merely
transforms the X-component (completely random,) to the Y-component, because now
the randomness is tied to the Y attribute. Graph it if you don't get
this. Of course each term used in the curve fit doesn't do much, because
the coefficients 'lock' on the largest non-linearity;</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>This is why, after the subtraction of the
approximation, the residue line has one major discontinuity for
each term. Remember, we are not trying to reduce a 1GB to 1byte here, each
curve fit (and subsequent subtraction) simply reduces the magnitude of the
residue remaining to be compressed.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am sorry to observe these dynamics; I was hoping
for someone to come forward and say, I built it and I have the following issues
-- or -- I observed ... </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Here's a little more info; maybe this will help get
the right person going...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The subtractive operation can be replaced by an
XOR; That's less intuitive and doesn't process the left-most three-bit
column field as well, but it does substanially improve the remaining
right-columns; Also, doing this to say 128 cells, each 1 bit
wide;</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>And by applying this process to each vector
concurrently, then making a new vector from the residue of each Y'th row
produces data with much better characteristics;</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Today my best perpetual compressor's don't use
floating point, but (except for the Y[zero] row of course, where no
improvement can be obtained,) building a "cross-hatch" vector set
has big advantages.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am pretty busy these days, (and I don't do
compression work any more -- the fighting is just ugly, not why I went into
programming at all) but if someone is interested in this stuff, please email
me.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>--jg</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV> </DIV></BODY></HTML>