Section 9.14 RTP Header extensions #131

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aboba opened this Issue Jul 15, 2014 · 1 comment

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@aboba
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aboba commented Jul 15, 2014

RFC 6051 is not included in the list of header extensions, although it is mentioned in RTP-Usage Section 5.2.1:

5.2.1. Rapid Synchronisation

Many RTP sessions require synchronisation between audio, video, and
other content. This synchronisation is performed by receivers, using
information contained in RTCP SR packets, as described in the RTP
specification [RFC3550]. This basic mechanism can be slow, however,
so it is RECOMMENDED that the rapid RTP synchronisation extensions
described in [RFC6051] be implemented in addition to RTCP SR-based
synchronisation. The rapid synchronisation extensions use the
general RTP header extension mechanism [RFC5285], which requires
signalling, but are otherwise backwards compatible.

@aboba
Contributor
aboba commented Jul 15, 2014

Proposed resolution is to add RFC 6051 to the list of extensions.

Question: RFC 5450 isn't mentioned in RTP usage. Should this be in there?

@robin-raymond robin-raymond added the 1.1 label Jul 15, 2014
@robin-raymond robin-raymond pushed a commit to robin-raymond/ortc that referenced this issue Jul 16, 2014
Robin Raymond Added section on WebRTC 1.0 compatibility issues, responding to Issue #…
…66

Added Identity support, as described in Issue #78
Reworked getStats method, as described in Issue #85
Removed ICE restart method described in Issue #93
Addressed CNAME and synchronization context issues described in Issue #94
Fixed WebIDL issues noted in Issue #97
Addressed NITs described in Issue #99
DTLS transport issues fixed as described in Issue #100
ICE transport issues fixed as described in Issue #101
ICE transport controller fixes made as described in Issue #102
Sender and Receiver object fixes made as described in Issue #103
Fixed RTCRtpEncodingParameter default issues described in Issue #104
Fixed 'Big Picture' issues descibed in Issue #105
Fixed RTCRtpParameter default issues described in Issue #106
Added a multi-stream capability, as noted in Issue #108
Removed quality scalability capabilities and parameters, as described in Issue #109
Added scalability examples as requested in Issue #110
Addressed WebRTC 1.0 Data Channel compatibility issue described in Issue #111
Removed header extensions from RTCRtpCodecParameters as described in Issue #113
Addressed RTP/RTCP non-mux issues with IdP as described in Issue #114
Added getParameter methods to RTCRtpSender and RTCRtpReceiver objects, as described in Issue #116
Added layering diagrams as requested in Issue #117
Added a typedef for payload type, as described in Issue #118
Moved onerror from the RTCIceTransport object to the RTCIceListener object as described in Issue #121
Added explanation of Voice Activity Detection (VAD), responding to Issue #129
Clarified the meaning of maxTemporalLayers and maxSpatialLayers, as noted in Issue #130
Added RFC 6051 to the list of header extensions and removed RFC 5450, as noted in Issue #131
Addressed ICE terminology issues, as described in Issue #132
Separated references into Normative and Informative, as noted in Issue #133
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