Browse Prior Art Database

Forward Error Correction Grouping Semantics in the Session Description Protocol (RFC5956) Disclosure Number: IPCOM000199953D
Original Publication Date: 2010-Sep-01
Included in the Prior Art Database: 2010-Sep-22
Document File: 28 page(s) / 30K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Begen: AUTHOR


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.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 9% of the total text.

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

Begen                        Standards Track                    [Page 1]
 RFC 5956              FEC Grouping Semantics in SDP       September 2010

 Copyright Notice

   Copyright (c) 2010 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restrictions with respect    to this document.  Code Components extracted from this document must    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

Table of Contents

   1. Introduction ....................................................3

   2. Requirements Notation ...........................................5

   3. Requirements and Changes from RFC 4...