[xiph-commits] r15523 - websites/celt-codec.org/comparison

[jm at svn.xiph.org]

Author: jm
Date: 2008-11-17 18:26:41 -0800 (Mon, 17 Nov 2008)
New Revision: 15523

Modified:
   websites/celt-codec.org/comparison/index.shtml.en
Log:
More details on CELT test methodology


Modified: websites/celt-codec.org/comparison/index.shtml.en
===================================================================
--- websites/celt-codec.org/comparison/index.shtml.en	2008-11-17 23:49:56 UTC (rev 15522)
+++ websites/celt-codec.org/comparison/index.shtml.en	2008-11-18 02:26:41 UTC (rev 15523)
@@ -15,7 +15,14 @@
 <!--#include virtual="/ssi/pagetop.include" -->
 <!--  All your page content goes here  -->
 <h1>Codec Quality Comparison</h1>
-<p> These are the results of MUSHRA tests with 10 listeners. The first graph is for the 48 kbit/s listening test.</p>
+
+<p> These are the results of MUSHRA tests comparing CELT with AAC-LD, G.722.1C and MP3, with 10 listeners. 
+We used version 0.3.2 of the CELT codec with 5.8 ms frames (256 samples) and 2.9 ms (128 samples) look-ahead,
+for a total of 8.7 ms at 44.1 kHz. As for AAC-LD, we used Apple's implementation, which has 11.6 ms frames 
+and 23.2 ms look-ahead, for a total of 34.8 ms delay at 44.1 kHz. The MP3 implementation is LAME in CBR more 
+and is only included for reference purposes only.</p>
+
+<p>The first graph is for the 48 kbit/s listening test.</p>
 <p align="center"><a href="results48.png"><img src="results48.png" width="500" height="350"></a></p>
 <p> The second graph is for the 64 kbit/s listening test. Note that G.722.1C is still at 48 kbit/s in that test because it is the highest bit-rate it supports.</p>
 <p align="center"><a href="results64.png"><img src="results64.png" width="500" height="350"></a></p>
@@ -56,7 +63,7 @@
 			<td>open-source/<br/>free software</td>
 		</tr>
 		<tr>
-			<td>G.722.1C</td>
+			<td>G.722.1C (Siren14)</td>
 			<td>32</td>
 
 			<td>24, 32, 48</td>