Session Description Protocol
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Session Description Protocol (SDP), is a format for describing streaming media initialization parameters. It has been published by the IETF as RFC 4566. [1]
SDP is intended for describing multimedia sessions for the purposes of session announcement, session invitation, and other forms of multimedia session initiation.
SDP started off as a component of the Session Announcement Protocol (SAP), but found other uses in conjunction with RTP, SIP and just as a standalone format for describing multicast sessions.
There are five terms related to SDP:
- Conference: It is a set of two or more communicating users along with the software they are using.
- Session : Session is the multimedia sender and receiver and the flowing stream of data.
- Session Announcement: A session announcement is a mechanism by which a session description is conveyed to users in a proactive fashion, i.e., the session description was not explicitly requested by the user.
- Session Advertisement : same as session announcement
- Session Description : A well defined format for conveying sufficient information to discover and participate in a multimedia session.
[edit] External links
- JSR 141: SDP API (for the Java platform)
- Radvision Ltd. popular SDP protocol stack vendor
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