[SIPForum-discussion] G729 variants

[Jarrar]

Bilal,

                                              G729 and G729a (annexb=no)

                                             G729b and G729ab (annexb=yes)

Jarrar


On Fri, Feb 22, 2013 at 3:08 PM, eapugo <eapugo at nexvortex.com> wrote:

>  Hello,
>
> This seems like a G.729a  call, annexb set to yes enables that
> functionality of g729b. G.729ab is I believe a variant on cisco UCs or
> other devices that produces better voice compression using VAD and DTX.
>
> I've seen on some devices where it is no specified in the message which
> spec. algorithm it is using but only in the device configuration. happy
> hunting
>
> Emeka Apugo SSCA--SSVVP
> Office: 703.439.2723
> Email: eapugo at nexvortex.com
> Web: www.nexvortex.com
> 3cx Certified Professional
>
> On 2/20/2013 4:01 PM, Bilal Javed wrote:
>
> Hi Guys,
>
> Can anybody explain what is codec of this sample
>
>
>
> Is it g729a or g729b?
>
> if
>
> annexb=yes then which codec is this ?
> annexb=no  then which codec is this ?
> annexa=yes then which codec is this ?
> annexa=no  then which codec is this ?
>
> How can we differentiate these codec from trace?
>
> 1.g729a
> 2.g729b
> 3.g729ab
> 4.g729 (simple)
>
>
> Thanks in Advance.
>
> Regards,
> Bilal
>
>
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