[xiph-commits] r12811 - trunk/speex/doc

[jm at svn.xiph.org]

Author: jm
Date: 2007-03-27 08:02:30 -0700 (Tue, 27 Mar 2007)
New Revision: 12811

Modified:
   trunk/speex/doc/manual.lyx
Log:
aec stuff


Modified: trunk/speex/doc/manual.lyx
===================================================================
--- trunk/speex/doc/manual.lyx	2007-03-27 12:33:43 UTC (rev 12810)
+++ trunk/speex/doc/manual.lyx	2007-03-27 15:02:30 UTC (rev 12811)
@@ -604,6 +604,27 @@
 \end_layout
 
 \begin_layout Standard
+In any hands-free communication system (Fig.
+ 
+\begin_inset LatexCommand \ref{fig:Acoustic-echo-model}
+
+\end_inset
+
+), speech from the remote end is played in the local loudspeaker, propagates
+ in the room and is captured by the microphone.
+ If the audio captured from the microphone is sent directly to the remote
+ end, then the remove user hears an echo of his voice.
+ An acoustic echo canceller is designed to remove the acoustic echo before
+ it is sent to the remote end.
+ It is important to understand that the echo canceller is meant to improve
+ the quality on the 
+\series bold
+remote
+\series default
+ end.
+\end_layout
+
+\begin_layout Standard
 \begin_inset Float figure
 wide false
 sideways false
@@ -647,6 +668,11 @@
 
 \begin_layout Caption
 Acoustic echo model
+\begin_inset LatexCommand \label{fig:Acoustic-echo-model}
+
+\end_inset
+
+
 \end_layout
 
 \end_inset