[Asterisk-Users] Transcoding times

[Irakli Natsvlishvili]

On what trascoding time depends on?

I started server, run * and issued command show translations
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sipsrv1*CLI> show translation 
         Translation times between formats (in milliseconds)
          Source Format (Rows) Destination Format(Columns)

         g723   gsm  ulaw  alaw  g726 adpcm  slin lpc10  g729 speex  ilbc
   g723     -     3     2     2     2     2     1     3    58     -    61
    gsm    53     -     2     2     2     2     1     3    58     -    61
   ulaw    53     3     -     1     2     2     1     3    58     -    61
   alaw    53     3     1     -     2     2     1     3    58     -    61
   g726    53     3     2     2     -     2     1     3    58     -    61
  adpcm    53     3     2     2     2     -     1     3    58     -    61
   slin    52     2     1     1     1     1     -     2    57     -    60
  lpc10    54     4     3     3     3     3     2     -    59     -    62
   g729    55     5     4     4     4     4     3     5     -     -    63
  speex     -     -     -     -     -     -     -     -     -     -     -
   ilbc    54     4     3     3     3     3     2     4    59     -     -
----------------------------------------------------------------------

If I restart * and issue the same command

----------------------------------------------------------------------
*CLI> show translation 
         Translation times between formats (in milliseconds)
          Source Format (Rows) Destination Format(Columns)

         g723   gsm  ulaw  alaw  g726 adpcm  slin lpc10  g729 speex  ilbc
   g723     -     3     2     2     2     2     1     3    15     -    14
    gsm    14     -     5     5     5     5     4     6    18     -    17
   ulaw    11     3     -     1     2     2     1     3    15     -    14
   alaw    11     3     1     -     2     2     1     3    15     -    14
   g726    11     3     2     2     -     2     1     3    15     -    14
  adpcm    11     3     2     2     2     -     1     3    15     -    14
   slin    10     2     1     1     1     1     -     2    14     -    13
  lpc10    12     4     3     3     3     3     2     -    16     -    15
   g729    13     5     4     4     4     4     3     5     -     -    16
  speex     -     -     -     -     -     -     -     -     -     -     -
   ilbc    12     4     3     3     3     3     2     4    16     -     -
----------------------------------------------------------------------

Why?

Irakli