The SDP (Session Description Protocol) Dependency Attribute
draft-schmidt-mmusic-media-dependency-00
| Document | Type |
Expired Internet-Draft
(individual)
Expired & archived
|
|
|---|---|---|---|
| Author | Christian Schmidt | ||
| Last updated | 2007-01-22 | ||
| RFC stream | (None) | ||
| Intended RFC status | (None) | ||
| Formats | |||
| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | Expired | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:
Abstract
The Session Description Protocol (SDP) was intended for describing multimedia sessions for the purposes of session announcement, session invitation, and other forms of multimedia session initiation. Together with Offer/Answer model it defines a mechanism, how two entities can reach a common view of a multimedia session between them. In certain cases, there are dependencies between media streams, for example a text stream for subtitling make sense only together with a video stream. To avoid senseless connections, the SDP mechanism can be extended with a new Session Description Protocol (SDP) media-level attribute: "dependency". The "dependency" attribute allows the offerer to define dependencies of media streams. The updated offer/ answer mechanism used with new "dependency" attribute can be used furthermore, that in a multi-party SIP session all participants share at least one common media type.
Authors
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)