Re: SV: [dccp] DCCP voice quality experiments

[Lars Eggert <lars.eggert at netlab.nec.de>]

Hi,

sorry if I was unclear - I didn't mean to imply that there are no  
codecs that adjust their rate, I merely meant to say that the ones  
*we used* didn't.

On Sep 12, 2006, at 10:15, Ingemar Johansson S (LU/EAB) wrote:
> Not totally updated on this issue but the AMR speech codec family  
> can adjust the codec rate over a
> relatively large range.
> AMR-NB (0-4kHz audio spectum) has the bitrate range 4.75 to 12.2kbps
> AMR-WB (0-8kHz audio spectum) has the bitrate range 6.60 to 23.85kbps
> C-code is available at
> http://www.3gpp.org/ftp/Specs/html-info/26104.htm
> http://www.3gpp.org/ftp/Specs/html-info/26173.htm
> Payload format is described in RFC3267
>
> Also is available an audio codec (AMR-WB+) with bitrate range  
> 5.2-48kbps at
> http://www.3gpp.org/ftp/Specs/html-info/26304.htm
> Payload format is described in RFC4352

Lars
--
Lars Eggert                                     NEC Network Laboratories

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