website

Update of /cvsroot/jbig2dec/website
In directory usw-pr-cvs1:/tmp/cvs-serv24561

Modified Files:
	index.html 
Log Message:
mention the official specs

Index: index.html
===================================================================
RCS file: /cvsroot/jbig2dec/website/index.html,v
retrieving revision 1.6
retrieving revision 1.7
diff -u -r1.6 -r1.7
--- index.html	7 Jul 2002 18:46:31 -0000	1.6
+++ index.html	7 Jul 2002 19:03:22 -0000	1.7
@@ -8,11 +8,29 @@
 
 <h1>jbig2dec</h1>
 
-<p>jbig2dec is a decoder implementation of the JBIG2 image compression format. JIBG2 is designed for lossy or lossless encoding of 'bilevel' (1-bit monochrome) images at moderately high resolution, and in particular scanned paper documents. In this domain it is very efficient, offering compression ratios on the order of 100:1.</p>
-
-<p>This is a decoder only implementation, and currently is in the pre-alpha stage, meaning it doesn't really work yet.</p>
-
-<p>More information about JBIG2 and a copy of the draft spec are available <a href="http://www.jpeg.org/public/jbigpt2.htm">here</a>. JBIG2 also includes the CCITT T.4 and T.6 (group 3 and group 4) fax encodings, which are documented separately. Their specifications can be obtained from the <a href="http://www.itu.int/publications/telecom.html">ITU</a>, or you can get the earlier CCITT versions <a href="ftp://sunsite.doc.ic.ac.uk/computing/ccitt/ccitt-standards/1988/7_3_01.ps.gz">here</a> and <a href="ftp://sunsite.doc.ic.ac.uk/computing/ccitt/ccitt-standards/1988/7_3_01.ps.gz">here</a>.</p>
+<p><em>jbig2dec</em> is a decoder implementation of the JBIG2 image compression format.
+JBIG2 is designed for lossy or lossless encoding of 'bilevel' (1-bit monochrome) images at
+moderately high resolution, and in particular scanned paper documents. In this domain it is very
+efficient, offering compression ratios on the order of 100:1.</p>
+
+<p>This is a decoder only implementation, and currently is in the alpha stage, meaning it
+doesn't really work yet.</p>
+
+<p>The specificication has been published as ISO IEC 14492 and ITU T.88. These documents
+completely describe the format and they'll be required if you want to understand the code and
+contribute. We prefer the ISO version, but haven't discovered significant differences between the
+two.</p>
+
+<p>JBIG2 also includes the CCITT T.4 and T.6 (group 3 and group 4) fax encodings, which are
+documented separately. Their specifications can be obtained from the <a
+href="http://www.itu.int/publications/telecom.html">ITU</a> as can T.88.</p>
+
+Unfortunately none of these documents are free, though the ITU sometimes offers free download
+specials. More information about JBIG2 and a copy of the draft spec are available 
+<a href="http://www.jpeg.org/public/jbigpt2.htm">here</a>. 
+The earlier CCITT versions of the fax standards are also available for free
+<a href="ftp://sunsite.doc.ic.ac.uk/computing/ccitt/ccitt-standards/1988/7_3_01.ps.gz">here</a>
+and <a href="ftp://sunsite.doc.ic.ac.uk/computing/ccitt/ccitt-standards/1988/7_3_01.ps.gz">here</a>.</p>
 
 <h2>Files</h2>
 
@@ -24,17 +42,21 @@
 Dave Tompkins has a number of 
 <a href="http://www.ece.ubc.ca/spmg/jbig2/bitstreams/main.html">test bitstreams</a> on his site at
 UBC.</p>
+
 <p>CVision offers some PDF-embedded <a
 href="http://www.cvisiontech.com/jbig2_samplelinks.html">example files</a> from their CVista
 compressor. The raw bitstreams will need to be extracted from the PDF wrapper before they can
-be used with jbig2dec.</p>
+be fed to jbig2dec.</p>
 
 <h2>Contact</h2>
 
-<p>The development discussion list is <a
-href="http://snow.thaumas.net/cgi-bin/mailman/listinfo/jbig2-dev/">here</a>. There is also a <a href="http://snow.thaumas.net/cgi-bin/mailman/listinfo/jbig2-cvs/">commit announcement list</a> for the cvs repository.</p>
+<p>The development discussion list is
+<a href="http://snow.thaumas.net/cgi-bin/mailman/listinfo/jbig2-dev/">here</a>. There is also a 
+<a href="http://snow.thaumas.net/cgi-bin/mailman/listinfo/jbig2-cvs/">commit announcement list</a>
+for the cvs repository.</p>
 
-<p>You can generally find the developers in #ghostscript on irc.<a href="http://openprojects.net/">openprojects.net</a>.</p>
+<p>You can generally find the developers in #ghostscript on
+irc.<a href="http://openprojects.net/">openprojects.net</a>.</p>
 
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