Browse Prior Art Database

RTP Clock Source Signalling (RFC7273) Disclosure Number: IPCOM000237644D
Original Publication Date: 2014-Jun-01
Included in the Prior Art Database: 2014-Jul-01
Document File: 60 page(s) / 63K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Williams: AUTHOR [+4]


RTP protocols use NTP format timestamps to facilitate multimedia session synchronisation and to provide estimates of round-trip time (RTT) and other statistical parameters.

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This is the abbreviated version, containing approximately 4% of the total text.

Internet Engineering Task Force (IETF)                       A. Williams Request for Comments: 7273                                      Audinate Category: Standards Track                                       K. Gross ISSN: 2070-1721                                             AVA Networks                                                       R. van Brandenburg                                                              H. Stokking                                                                      TNO                                                                June 2014

                       RTP Clock Source Signalling


   NTP format timestamps are used by several RTP protocols for    synchronisation and statistical measurements.  This memo specifies    Session Description Protocol (SDP) signalling that identifies    timestamp reference clock sources and SDP signalling that identifies    the media clock sources in a multimedia session.

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

Copyright Notice

   Copyright (c) 2014 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.

Williams, et al.             Standards Track                    [Page 1]
 RFC 7273               RTP Clock Source Signalling             June 2014

 Table of Contents

   1.  Introduction  . . . . . . . . . . . ....