<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:Arial;
color:windowtext;}
p.section1, li.section1, div.section1
{mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman";}
@page Section1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=section1><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi there<o:p></o:p></span></font></p>
<p class=section1><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am using Meetme and have been testing with 2 different
codecs – GSM and g.711 – these seem to be the only 2 free codecs
which are supported by my soft phones (built using the RTC Client API). All
users will be using this same softphone when communicating.<o:p></o:p></span></font></p>
<p class=section1><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The quality of g.711 (ulaw) I have found to be good, but it
uses too much bandwidth. Although it sends less data, the quality of GSM is not
great – it is quite fuzzy and not pleasant. Is there any way to improve
the quality of this codec? Or perhaps it is just an inferior codec to others
which transmit at 13kbps or less (such as g.729 or ilbc)? Skype uses ilbc and
the quality seems really good.<o:p></o:p></span></font></p>
<p class=section1><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Lastly, what is the overhead that is added onto the audio
packets? For instance, GSM (13 kbps) sends at about 40 kbps and g.711 (64 kbps)
sends at about 80 kbps?<o:p></o:p></span></font></p>
<p class=section1><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Many thanks<o:p></o:p></span></font></p>
<p class=section1><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Steven<o:p></o:p></span></font></p>
<p class=section1><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=section1><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=section1><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=section1><font size=1 face="Times New Roman"><span style='font-size:
8.0pt'><br>
</span></font><font size=1><span style='font-size:8.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
</body>
</html>