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RTP Header Extension for the RTP Control Protocol (RTCP) Source Description Items (RFC7941) Disclosure Number: IPCOM000247393D
Original Publication Date: 2016-Aug-01
Included in the Prior Art Database: 2016-Sep-01
Document File: 34 page(s) / 40K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Westerlund: AUTHOR [+4]


This specification defines an RTP header extension [RFC3550][RFC5285] that can carry RTCP Source Description (SDES) items. Normally, the SDES items are carried in their own RTCP packet type [RFC3550]. By including selected SDES items in a header extension, the determination of relationship and synchronization context for new RTP streams (SSRCs) in an RTP session can be optimized. Which relationship and what information depends on the SDES items carried. This becomes a complement to using only RTCP for SDES item delivery.

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Internet Engineering Task Force (IETF)                     M. Westerlund Request for Comments: 7941                                     B. Burman Category: Standards Track                                       Ericsson ISSN: 2070-1721                                                  R. Even                                                      Huawei Technologies                                                                M. Zanaty                                                            Cisco Systems                                                              August 2016

                         RTP Header Extension for         the RTP Control Protocol (RTCP) Source Description Items


   Source Description (SDES) items are normally transported in the RTP    Control Protocol (RTCP).  In some cases, it can be beneficial to    speed up the delivery of these items.  The main case is when a new    synchronization source (SSRC) joins an RTP session and the receivers    need this source's identity, relation to other sources, or its    synchronization context, all of which may be fully or partially    identified using SDES items.  To enable this optimization, this    document specifies a new RTP header extension that can carry SDES    items.

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 7841.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Westerlund, et al.           Standards Track                    [Page 1]
 RFC 7941                  RTP HE for RTCP SDES               August 2016

 Copyright Notice

   Copyright (c) 2016 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 thi...