[asterisk-users] How accurate is show translation?

[James Harper]

> Just to give you another (relative)  comparison... This is from a VIA
> processor running at 533MHz, (64KB Cache) asterisk compiled as i586 as
> it's missing some of the nicer MMX instructions:
> 
>           g723   gsm  ulaw  alaw  g726 adpcm  slin lpc10  g729 speex
ilbc
>     g723     -     -     -     -     -     -     -     -     -     -
-
>      gsm     -     -    10    10    32    12     9    43     -     -
174
>     ulaw     -    18     -     1    24     4     1    35     -     -
166
>     alaw     -    18     1     -    24     4     1    35     -     -
166
>     g726     -    36    20    20     -    22    19    53     -     -
184
>    adpcm     -    19     3     3    25     -     2    36     -     -
167
>     slin     -    17     1     1    23     3     -    34     -     -
165
>    lpc10     -    42    26    26    48    28    25     -     -     -
190
>     g729     -     -     -     -     -     -     -     -     -     -
-
>    speex     -     -     -     -     -     -     -     -     -     -
-
>     ilbc     -    49    33    33    55    35    32    66     -     -
-
> 

Hey... why does your asterisk allow translation to and from ilbc?

This is mine (Dual Celeron 533's):
         Translation times between formats (in milliseconds)
          Source Format (Rows) Destination Format(Columns)

         g723   gsm  ulaw  alaw  g726 adpcm  slin lpc10  g729 speex
ilbc
   g723     -     -     -     -     -     -     -     -     -     -
-
    gsm     -     -     7     7    13     7     6    17    39   100
-
   ulaw     -    17     -     1     8     2     1    12    34    95
-
   alaw     -    17     1     -     8     2     1    12    34    95
-
   g726     -    23     8     8     -     8     7    18    40   101
-
  adpcm     -    17     2     2     8     -     1    12    34    95
-
   slin     -    16     1     1     7     1     -    11    33    94
-
  lpc10     -    24     9     9    15     9     8     -    41   102
-
   g729     -    23     8     8    14     8     7    18     -   101
-
  speex     -    27    12    12    18    12    11    22    44     -
-
   ilbc     -     -     -     -     -     -     -     -     -     -
-

And it won't translation ilbc to/from anything else. I had to buy some
g729 licenses (a better option anyway though) because my voip provider
only does alaw, g729, and ilbc, and I prefer to use alaw internally...

James