[Speex-dev] [OT] RE: CELT 0.5.0 is out

Alexander Chemeris Alexander.Chemeris at sipez.com
Fri Oct 17 01:12:56 PDT 2008

On Fri, Oct 17, 2008 at 8:38 AM, David Hogan <david.hogan at freshtel.net> wrote:
>> I understand, but CELT would be useless for SIP if one can't
> read/guess
>> correctly decoder configuration from the RTP data.
>> One possible way to cope with this would be to have several CELT payload
>> defines for use in SIP signalling. This is usually not well accepted as
>> this would remove flexibility and increase size and error withing SIP
>> negotiation.
> Sorry for going OT, but this is a good example of why I dislike SIP; to
> me it seems like someone sticky-taped a bunch of not quite ideally
> suited standards together (HTTP? Really? Over UDP??), much of which is
> then ignored by people who 'just need to get calls working'. The result
> is that you might not be able to rely on something as fundamental as
> media attributes being parsed in an SDP.

I'm sorry to touch your feelings, but this problem will arise not only with
SIP, but with any protocol, which tries to get common codec set with
SDP. So, the real problem here is SDP rather then SIP, and this is well

Alexander Chemeris.

SIP VoIP, IM and Presence Consulting
tel: +1 (617) 273-4000

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