[asterisk-users] How accurate is show translation?

[Paul Hales]

When you built Asterisk, it must have refused to build the ilbc codec -
I have never seen an Asterisk box that could not transcode ilbc, in over
3 years of working with Asterisk.

PaulH

On Sun, 2006-12-24 at 14:12 +1100, James Harper wrote:
>  > 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
> 
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