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RFC 5583
Signaling Media Decoding Dependency in the Session Description Protocol (SDP),July 2009
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DOI: https://doi.org/10.17487/RFC5583
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Abstract
This memo defines semantics that allow for signaling the decodingdependency of different media descriptions with the same media type inthe Session Description Protocol (SDP). This is required, for example,if media data is separated and transported in different network streamsas a result of the use of a layered or multiple descriptive media codingprocess.
A new grouping type "DDP" -- decoding dependency -- is defined, to beused in conjunction with RFC 3388 entitled "Grouping of Media Lines inthe Session Description Protocol". In addition, an attribute isspecified describing the relationship of the media streams in a "DDP"group indicated by media identification attribute(s) and media formatdescription(s). [STANDARDS-TRACK]
For the definition ofStatus,seeRFC 2026.
For the definition ofStream, seeRFC 8729.