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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>It’s the magical Celeron chip…<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>--------------------------------------------------<br>
Salvatore Giudice<br>
Salvatore.Giudice@VoIPSecurityTraining.com<br>
<br>
VoIP Security Training, LLC<br>
http://VoIPSecurityTraining.com<br>
<br>
848 N. Rainbow Blvd. #1676<br>
Las Vegas, NV 89107<br>
Phone: (617) 959-7625<br>
Fax: (214) 279-2906<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] <b>On Behalf Of </b>Al<br>
<b>Sent:</b> Friday, May 04, 2007 3:08 AM<br>
<b>To:</b> asterisk-users@lists.digium.com<br>
<b>Subject:</b> [asterisk-users] Asterisk Codec Translation Table<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hello
list,</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I
have always though codec translation table is dircetly connected to system
speed, utill i came across this:</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>in
my lab, i have 2 boxes,</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>First
box is an Intel Celeron 1.7 GHZ with 256M RAM:</span><o:p></o:p></p>
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<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> show
translation<br>
Translation times between
formats (in milliseconds) for one second of data<br>
Source Format (Rows)
Destination Format (Columns)</span><o:p></o:p></p>
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<div>
<p class=MsoNormal> <o:p></o:p></p>
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<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
g723 gsm ulaw alaw g726aal2 adpcm slin lpc10 g729 speex ilbc
g726 g722<br>
gsm
- -
2 2
3
2 1
9 -
- 25
3 -<br>
ulaw
- 6
- 1
3
2 1
9 -
- 25 3
-<br>
ilbc
- 10 6
6
7
6
5 13
-
- -
7 -<br>
g726
- 7
3 3
1
3 2 10
- -
26 - -<br>
</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Second
server is Dual Xeon 2Gh 1G RAM</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>show
translation<br>
Translation times between
formats (in milliseconds) for one second of data<br>
Source Format (Rows)
Destination Format (Columns)</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
g723 gsm ulaw alaw g726aal2 adpcm slin lpc10 g729 speex ilbc g726 g72 </span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
gsm -
- 4
4
6
4 3 28
- -
25 5 -<br>
ulaw -
7 -
1
4 2
1 26
- -
23 3 -<br>
ilbc -
9 4
4
6
4 3 28
- -
- 5 -<br>
g726 -
7 2
2
1
2 1
26 -
- 23 - -</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Here
is the fun part, box1 is faster in converting ulaw to gsm!</span><o:p></o:p></p>
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<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Is
this table accurate?</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Does
it mean asterisk is not handeling multiple cpus very good?</span><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>both
boxes running asterisk 1.4.4</span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> <o:p></o:p></span></p>
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