Browse Prior Art Database

Support for Multiple Clock Rates in an RTP Session (RFC7160)

IP.com Disclosure Number: IPCOM000236246D
Original Publication Date: 2014-Apr-01
Included in the Prior Art Database: 2014-Apr-15
Document File: 26 page(s) / 25K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Petit-Huguenin: AUTHOR [+3]

Abstract

The clock rate is a parameter of the payload format as identified in RTP and RTCP (RTP Control Protocol) by the payload type value. It is often defined as being the same as the sampling rate but that is not always the case (see, for example, the G722 and MPA audio codecs [RFC3551]).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 10% of the total text.

Internet Engineering Task Force (IETF)                 M. Petit-Huguenin Request for Comments: 7160                            Impedance Mismatch Updates: 3550                                               G. Zorn, Ed. Category: Standards Track                                    Network Zen ISSN: 2070-1721                                               April 2014

            Support for Multiple Clock Rates in an RTP Session

Abstract

   This document clarifies the RTP specification regarding the use of    different clock rates in an RTP session.  It also provides guidance    on how legacy RTP implementations that use multiple clock rates can    interoperate with RTP implementations that use the algorithm    described in this document.  It updates RFC 3550.

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/rfc7160.

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    (http://trustee.ietf.org/license-info) 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.

 Petit-Huguenin & Zorn        Standards Track                    [Page 1]
 RFC 7160                  Multiple Clock Rates                April 2014

 Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2

   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4

   3.  Legacy RTP  . . . . . . . . . . . . . . . . . . . . . . . . .   4

     3.1.  Different SSRC  . . . . . . . . . . . . . . . . . . . . .   4

     3.2.  Same SSRC . . . . . . . . . . . . . . . . . . . . . . . .   5

       3.2.1.  Monotonic Timestamps  . . . . . . . . . . . . . . . ....