Keep piling ongoing work into CVS.

svn path=/trunk/vorbis/; revision=3663

diff --git a/doc/residue2.png b/doc/residue2.png
new file mode 100644 (file)
index 0000000..4df3333
Binary files /dev/null and b/doc/residue2.png differ

diff --git a/doc/vorbis-spec-res.html b/doc/vorbis-spec-res.html
index 6fad84b..0693ea6 100644 (file)
--- a/doc/vorbis-spec-res.html
+++ b/doc/vorbis-spec-res.html
@@ -128,7 +128,15 @@ codebook dimensions = 1  encoded as: [ 0 ], [ 1 ], [ 2 ], [ 3 ], [ 4 ], [ 5 ], [
 
 <h2> residue 2 </h2>
 
-
+Residue type two can be thought of as a variant of residue type 1.
+Rather than encoding multiple passed-in vectors as in residue type 1,
+the <i>ch</i> passed in vectors of length <i>n</i> are first
+interleaved and flattened into a single vector of length
+<i>ch</i>*<i>n</i>.  Encoding then proceeds as in type 1. Decoding is
+as in type 1 with decode interleave reversed. If operating on a single
+vector to begin with, residue type 1 and type 2 are equivalent.<p>
+
+<img src="residue2.png"><p>
 
 <h1>Residue decode</h1>