Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g723-g729-01.txt
worley@ariadne.com (Dale R. Worley) Thu, 23 May 2013 22:35 UTC
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To: Parthasarathi R <partha@parthasarathi.co.in>
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Cc: fluffy@cisco.com, mmusic@ietf.org
Subject: Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g723-g729-01.txt
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> From: "Parthasarathi R" <partha@parthasarathi.co.in> > > If the answerer supports RFC3551, then the answerer has to support RFC3555 > for annexb parameter. Annexb value default value is "Yes" in RFC 3555 as per > RFC 3551. RFC 4856 obsoletes RFC 3555 without changing "annexb" related > requirement. Please let me know any reason that you wish to change AnnexB > parameter default value now. Sorry, my mistake, I didn't realize that "annexb" is not an extension of audio/g729, it's defined in the base specification: RFC 4856 section 2.1.9 Registration of Media Type audio/G729 Type name: audio Subtype name: G729 Optional parameters: [...] annexb: indicates that Annex B, voice activity detection, is used or preferred. Permissible values are "yes" and "no" (without the quotes); "yes" is implied if this parameter is omitted. So the answer to Cullen's query is: > From: "Cullen Jennings (fluffy)" <fluffy@cisco.com> > > What happens when an endpoint that understands the anexb attribute > sends and offer to an endpoint that does not understand or implement > the anexb attribute ? Since the annexb attribute is part of the (original) registration of audio/g729, any endpoint that implements that media type understands the annexb attribute. If the answer does not include the annexb attribute, the answerer knows that it has implied the default "annexb=yes". Dale
- [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g723-g… internet-drafts
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Cullen Jennings (fluffy)
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Parthasarathi R
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Muthu Arul Mozhi Perumal (mperumal)
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Dale R. Worley
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Parthasarathi R
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Dale R. Worley
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Muthu Arul Mozhi Perumal (mperumal)
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Parthasarathi R
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Ari Keränen
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-g7… Parthasarathi R