[Asterisk-Users] How "expensive" are the different codecs? (Regarding CPU time)

Michael Vogel icarus at dabo.de
Wed Dec 15 09:23:38 MST 2004


el Flynn schrieb:

> at the CLI, type "show translation" and it will show a chart of how long 
> (in milliseconds) it will take to translate from one codec to another.

Thanks! That helps me a lot. Am I right that this chart is calculated 
depending my machine's speed:

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

        G723   GSM  ULAW  ALAW  G726 ADPCM SLINR LPC10 G729A SPEEX  ILBC
  G723     -     -     -     -     -     -     -     -     -     -     -
   GSM     -     -    13    13    47    15    12    43     -   253   124
  ULAW     -    41     -     1    36     4     1    32     -   242   113
  ALAW     -    41     1     -    36     4     1    32     -   242   113
  G726     -    82    43    43     -    45    42    73     -   283   154
ADPCM     -    43     4     4    38     -     3    34     -   244   115
SLINR     -    40     1     1    35     3     -    31     -   241   112
LPC10     -    58    19    19    53    21    18     -     -   259   130
G729A     -     -     -     -     -     -     -     -     -     -     -
SPEEX     -    52    13    13    47    15    12    43     -     -   124
  ILBC     -    59    20    20    54    22    19    50     -   260     -
zhad*CLI>
#######################################################################

Encoding to speex or ilbc seems to be too heavy for my machine ;-)

Thanks!

Michael



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