Subject: Re: [codec] codec tandeming/codec-requirements

From: Michael Knappe <[email-masked]>
Date: Thu, 22 Oct 2009 12:42:19 -0700

Christian, 

I am not looking for a particular codec type, only pointing out that any proposed codec may end up receiving traffic that at some point has already been compressed/uncompressed and lost some speech information redundancy in the uncompressed speech as it hits the internet codec. We should at least understand how the proposed codec will perform when receiving that previously compressed traffic.

Mike

----- Original Message -----
From: Christian Hoene <[email-masked]>
To: Michael Knappe
Cc: [email-masked] <[email-masked]>
Sent: Thu Oct 22 15:32:46 2009
Subject: RE: [codec]  codec tandeming/codec-requirements

Dear Michael Knappe,

> Cell phone 1 codec type 'A' -> transcode to internet codec -> transcode to
> cell phone 2 codec type 'B'

Honestly, in this case I would recommend you to use ITU codecs because they
have been designed for these use cases. 

With best regards,

 Christian