On Fri, 2008-04-11 at 06:50 -0600, Peter Saint-Andre wrote: > Paul Witty wrote: > > Peter Saint-Andre wrote: > >> Lauri Kaila wrote: > >> > >>> 2008/4/10, Peter Saint-Andre <[EMAIL PROTECTED]>: > >>> > >>>> Offlist, someone mentioned to me that it might be appropriate for > >>>> XEP-0167 to recommend or even require support for the ITU-T's G.711 > >>>> technology, which is represented by payload-types 0 (PCMU) and 8 > >>>> (PCMA) > >>>> as registered with the IANA. > >>>> http://www.itu.int/rec/T-REC-G.711/e > >>>> > >>>> Thoughts? > >>>> > >>>> > >>> I think 64 kbits/s is too much to be mandatory. > >>> > >> > >> I think the idea was that G.711 is supported everywhere, so recommending > >> support for it in Jingle would help interoperability with existing SIP > >> networks and the PSTN. > >> > > Indeed. We have a Jingle->SIP/H.323 gateway. I don't know of any SIP > > or H.323 endpoints which support Speex, so if that is the only > > recommended codec for Jingle audio, then we have to be prepared to > > transcode the audio in all cases. By guaranteeing a minimum of G.711, > > we should be always able to gateway between protocols without > > transcoding if so desired, even if we may need to transcode for higher > > quality audio e.g. Speex to AAC. > > Right, that's the idea. > > Is basic G.711 still patent-encumbered in any way? I'll have to do some > research on that...
The G.711 standard was published in 1972, I don't know of any jurisdiction where patents can last that long. -- Olivier Crête [EMAIL PROTECTED] Collabora Ltd
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