<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7226.0">
<TITLE>Re: [Speex-dev] Question from XM Radio</TITLE>
</HEAD>
<BODY>
<DIV id=idOWAReplyText73075 dir=ltr>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Thanks for the reply.
We are currently using AMBE (4Kbps) for our Traffic/Weather Channels. If
you have ever had a chance to hear the service, you will know that AMBE does not
do us well.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>I understand that 2Kbps is low quality, but
any poorer than AMBE?</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>If can get a decent quality for other
low bandwidth talk channels, such as about 10-16Kbps and have it sound
rather clean, then I would be gaining a bit of growth in the areas I'm
seeking.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>None of this would be Music,
understand. Music needs it's bandwidth... just voice only channels
like:</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>- Emergency Announcements</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>- Barkers (This channel is not yet
scheduled for Air</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>- Traffic/Weather</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>- ...etc</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>Thanks again for the reply.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2></FONT> </DIV></DIV>
<DIV id=idSignature61039 dir=ltr>
<DIV><FONT face=Arial color=#000000 size=2>
<DIV class=MsoNormal style="MARGIN: 0in 0in 0pt"><B><SPAN
style="FONT-SIZE: 7.5pt; COLOR: black; FONT-FAMILY: Arial">____________________________________________________________________________________________</SPAN></B></DIV>
<DIV class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><FONT
size=3><STRONG><SPAN style="COLOR: black; FONT-FAMILY: Arial">Terry
Carr</SPAN></STRONG><B><SPAN
style="FONT-SIZE: 7.5pt; COLOR: black; FONT-FAMILY: Arial"></SPAN></B></FONT></DIV>
<DIV class=MsoNormal
style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><STRONG><SPAN
style="FONT-SIZE: 10pt; COLOR: maroon; FONT-FAMILY: Arial">Manager, Broadcast
Applications</SPAN></STRONG><SPAN style="COLOR: black"></SPAN></DIV>
<DIV class=MsoNormal
style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><STRONG><SPAN
style="COLOR: olive; FONT-FAMILY: Arial"><FONT
size=3>XM</FONT></SPAN></STRONG><STRONG><SPAN
style="FONT-SIZE: 10pt; COLOR: olive; FONT-FAMILY: Arial">
</SPAN></STRONG><STRONG><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial">SATELLITE
RADIO</SPAN></STRONG><SPAN style="COLOR: black"></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><SPAN
style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: Arial">1500 Eckington Place,
NE</SPAN><SPAN style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: Arial">
(Flr-2, Ops Mgt)</SPAN><SPAN style="COLOR: black"></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><SPAN
style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: Arial">Washington</SPAN><SPAN
style="FONT-SIZE: 7.5pt; COLOR: gray; FONT-FAMILY: Arial">, DC 20002</SPAN><SPAN
style="COLOR: black"></SPAN></DIV>
<DIV class=MsoNormal style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><SPAN
style="FONT-SIZE: 7.5pt; COLOR: black; FONT-FAMILY: Arial">Phone: (202) 380-4081
- Fax: (202) 380-4768</SPAN></DIV></FONT></DIV></DIV>
<DIV dir=ltr><BR>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> Jean-Marc Valin
[mailto:Jean-Marc.Valin@USherbrooke.ca]<BR><B>Sent:</B> Sun 11/27/2005 4:55
PM<BR><B>To:</B> Carr, Terrance<BR><B>Cc:</B>
speex-dev@xiph.org<BR><B>Subject:</B> Re: [Speex-dev] Question from XM
Radio<BR></FONT><BR></DIV>
<DIV>
<P><FONT size=2>You can try the Ogg DirectShow filter to get Windows support for
Speex:<BR><A
href="http://www.illiminable.com/ogg/">http://www.illiminable.com/ogg/</A><BR><BR>>
My goal is to find a promising codec for 2Kbps.<BR><BR>You should be aware that
the 2 kbps mode has quite poor quality in<BR>Speex, a bit similar to the LPC10
vocoder.<BR><BR>> - Has there been any successful satellite streaming
projects using<BR>> Speex?<BR><BR>Not that I know of.<BR><BR>> - Has there
been any projects having a decoder embedded in an IC<BR><BR>Not that I know
of.<BR><BR>> - If none of the above, what type of processing power for
real-time<BR>> Encoding/Decoding are we talking. Does anyone have
real-time<BR>> encoding/decoding software yet?<BR><BR>The source code can be
compiled as fixed-point and I would think the<BR>complexity is somewhere in the
5-10 MIPS range for encode+decode<BR>(decoding is cheaper than
encoding).<BR><BR>
Jean-Marc<BR><BR><BR></FONT></P></DIV>
</BODY>
</HTML>