Forward Error Correction Grouping Semantics in the Session Description Protocol (RFC5956)
Original Publication Date: 2010-Sep-01
Included in the Prior Art Database: 2010-Sep-22
Internet Society Requests For Comment (RFCs)
Any application that needs a reliable transmission over an unreliable packet network has to cope with packet losses. Forward Error Correction (FEC) is an effective approach that improves the reliability of the transmission, particularly in multicast and broadcast applications where the feedback from the receiver(s) is potentially limited.
Internet Engineering Task Force (IETF) A. Begen Request for Comments: 5956 Cisco Obsoletes: 4756 September 2010 Category: Standards Track ISSN: 2070-1721
Forward Error Correction Grouping Semantics in the Session Description Protocol
This document defines the semantics for grouping the associated source and FEC-based (Forward Error Correction) repair flows in the Session Description Protocol (SDP). The semantics defined in this document are to be used with the SDP Grouping Framework (RFC 5888). These semantics allow the description of grouping relationships between the source and repair flows when one or more source and/or repair flows are associated in the same group, and they provide support for additive repair flows. SSRC-level (Synchronization Source) grouping semantics are also defined in this document for Real-time Transport Protocol (RTP) streams using SSRC multiplexing.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc5956.
Begen Standards Track [Page 1]
RFC 5956 FEC Grouping Semantics in SDP September 2010
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Table of Contents
1. Introduction ....................................................3
2. Requirements Notation ...........................................5
3. Requirements and Changes from RFC 4...