[asterisk-users] Asterisk Codec Translation Table

[Salvatore Giudice]

It's the magical Celeron chip.

 

--------------------------------------------------
Salvatore Giudice
Salvatore.Giudice at VoIPSecurityTraining.com

VoIP Security Training, LLC
http://VoIPSecurityTraining.com

848 N. Rainbow Blvd. #1676
Las Vegas, NV 89107
Phone: (617) 959-7625
Fax: (214) 279-2906

 

From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Al
Sent: Friday, May 04, 2007 3:08 AM
To: asterisk-users at lists.digium.com
Subject: [asterisk-users] Asterisk Codec Translation Table

 

Hello list,

I have always though codec translation table is dircetly connected to system
speed, utill i came across this:

in my lab, i have 2 boxes,

First box is an Intel Celeron 1.7 GHZ with 256M RAM:

 show translation
         Translation times between formats (in milliseconds) for one second
of data
          Source Format (Rows) Destination Format (Columns)

 

              g723   gsm ulaw alaw g726aal2 adpcm slin lpc10 g729 speex ilbc
g726 g722
     gsm    -           -    2    2        3               2    1     9
-     -       25    3       -
     ulaw    -         6       -    1        3               2    1     9
-     -      25    3       -
       ilbc    -        10    6    6        7                6    5    13
-     -        -    7    -
     g726    -          7    3    3        1                3    2    10
-     -        26    -    -
     

 

Second server is Dual Xeon 2Gh 1G RAM

 

show translation
         Translation times between formats (in milliseconds) for one second
of data
          Source Format (Rows) Destination Format (Columns)

 

          g723 gsm ulaw alaw g726aal2 adpcm slin lpc10 g729 speex ilbc g726
g72 

  gsm    -      -        4    4        6           4        3    28      -
-      25    5    -
 ulaw    -      7        -     1        4           2        1    26     -
-   23    3    -
  ilbc    -      9        4    4        6           4        3    28      -
-      -     5    -
  g726    -    7         2    2        1           2        1    26      -
-     23     -    -

 

 

Here is the fun part, box1 is faster in converting ulaw to gsm!

Is this table accurate?

Does it mean asterisk is not handeling multiple cpus very good?

both boxes running asterisk 1.4.4

 

 


     

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