diff --git a/doc/codec2.pdf b/doc/codec2.pdf
index 6e63266..c47e5f8 100644
Binary files a/doc/codec2.pdf and b/doc/codec2.pdf differ
diff --git a/doc/codec2.tex b/doc/codec2.tex
index b9dd0e4..9bcd310 100644
--- a/doc/codec2.tex
+++ b/doc/codec2.tex
@@ -19,7 +19,8 @@
   \input{gitbranch.txt}
 }
 
-\title{Codec 2}
+\title{Codec 2 Algorithm Description}
+
 \author{David Rowe\\ \\ Revision: {\gitrevision} on branch: {\branch}}
 
 \begin{document}