Speex dev - Oct 2008 - CELT 0.5.0 is out

Hi Jean-Marc,

1. Why CELT versus Speex?
2. What's the RTP payload for CELT, so we can add it in Yate?
3. What are the SDP declaration parameters?

Diana

Jean-Marc Valin wrote:
> Hi everyone,
>
> I'm happy to announce CELT version 0.5.0. This release includes
> simplifications to the bit allocation code and includes a new
> low-complexity mode that can be enabled (without breaking compatibility)
> on the encoder side. There are several other optimisations and bug fixes
> included. The API has also been slightly modified, so code using CELT
> will have to be updated (only minor changes required).
>
> You can download it from the website: http://www.celt-codec.org/
> Please note that the bit-stream still isn't frozen which means that 1)
> we can still improve things and 2) you can't rely on compatibility yet.
>
> Cheers,
>
> 	Jean-Marc
> _______________________________________________
> Speex-dev mailing list
> Speex-dev at xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev
>

On Tue, 14 Oct 2008, Jean-Marc Valin wrote:
> Diana Cionoiu a ?crit :
>> Hi Jean-Marc,
>>
>> 1. Why CELT versus Speex?
>
> There's nearly no overlap between Speex and CELT. CELT is much higher
> quality, very low latency, and of course, higher bit-rate than Speex. So
> it really depends on the application.
>
>> 2. What's the RTP payload for CELT, so we can add it in Yate?
>> 3. What are the SDP declaration parameters?
>
> None of that is defined yet, though I'm open to suggestions on how to
do
> the mapping.
CELT/44100 and CELT/48000
a=fmtp:105 stereo=on

probably a latency value?

"CELT" doesn't seems to be used for any other existing audio
related
stuff? right?

I didn't read fully the doc...

One question for you Jean-Marc: can you confirm that the decoder
will receive enough information to autoconfigure itself when receiving
RTP streams? One documentation sentence seems to not go in that
direction while it's a requirement for VoIP and mainly for SIP
negotiation.

tks
Aymeric

> 	Jean-Marc
>
>
>> Diana
>>
>> Jean-Marc Valin wrote:
>>> Hi everyone,
>>>
>>> I'm happy to announce CELT version 0.5.0. This release includes
>>> simplifications to the bit allocation code and includes a new
>>> low-complexity mode that can be enabled (without breaking
compatibility)
>>> on the encoder side. There are several other optimisations and bug
fixes
>>> included. The API has also been slightly modified, so code using
CELT
>>> will have to be updated (only minor changes required).
>>>
>>> You can download it from the website: http://www.celt-codec.org/
>>> Please note that the bit-stream still isn't frozen which means
that 1)
>>> we can still improve things and 2) you can't rely on
compatibility yet.
>>>
>>> Cheers,
>>>
>>>     Jean-Marc
>>> _______________________________________________
>>> Speex-dev mailing list
>>> Speex-dev at xiph.org
>>> http://lists.xiph.org/mailman/listinfo/speex-dev
>>>
>>
>>
>>
> _______________________________________________
> Speex-dev mailing list
> Speex-dev at xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev
>