RTP/RTCP Extension for RTP Splicing Notification
RFC 8286

Document Type RFC - Proposed Standard (October 2017; No errata)
Last updated 2017-10-25
Replaces draft-xia-avtext-splicing-notification
Stream IETF
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Stream WG state Submitted to IESG for Publication (wg milestone: Nov 2015 - Submit Mechanism for... )
Document shepherd Jonathan Lennox
Shepherd write-up Show (last changed 2015-10-20)
IESG IESG state RFC 8286 (Proposed Standard)
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IANA IANA review state Version Changed - Review Needed
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Internet Engineering Task Force (IETF)                            J. Xia
Request for Comments: 8286                                       R. Even
Category: Standards Track                                       R. Huang
ISSN: 2070-1721                                                   Huawei
                                                                 L. Deng
                                                            China Mobile
                                                            October 2017

            RTP/RTCP Extension for RTP Splicing Notification

Abstract

   Content splicing is a process that replaces the content of a main
   multimedia stream with other multimedia content and that delivers the
   substitutive multimedia content to the receivers for a period of
   time.  The splicer is designed to handle RTP splicing and needs to
   know when to start and end the splicing.

   This memo defines two RTP/RTCP extensions to indicate the splicing-
   related information to the splicer: an RTP header extension that
   conveys the information "in band" and an RTP Control Protocol (RTCP)
   packet that conveys the information out of band.

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
   https://www.rfc-editor.org/info/rfc8286.

Xia, et al.                  Standards Track                    [Page 1]
RFC 8286                RTP Splicing Notification           October 2017

Copyright Notice

   Copyright (c) 2017 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
   (https://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.

Table of Contents

   1. Introduction ....................................................3
      1.1. Terminology ................................................3
   2. Overview ........................................................4
      2.1. Overview of RTP Splicing ...................................4
      2.2. Overview of Splicing Interval ..............................5
   3. Conveying Splicing Interval in RTP/RTCP Extensions ..............7
      3.1. RTP Header Extension .......................................7
      3.2. RTCP Splicing Notification Message .........................8
   4. Reducing Splicing Latency ......................................10
   5. Failure Cases ..................................................11
   6. Session Description Protocol (SDP) Signaling ...................12
      6.1. Declarative SDP ...........................................12
      6.2. Offer/Answer without BUNDLE ...............................13
      6.3. Offer/Answer with BUNDLE: All Media Are Spliced ...........14
      6.4. Offer/Answer with BUNDLE: A Subset of Media Are Spliced ...16
   7. Security Considerations ........................................18
   8. IANA Considerations ............................................19
      8.1. RTCP Control Packet Types .................................19
      8.2. RTP Compact Header Extensions .............................20
      8.3. SDP Grouping Semantic Extension ...........................20
   9. References .....................................................20
      9.1. Normative References ......................................20
      9.2. Informative References ....................................21
   Acknowledgements ..................................................22
   Authors' Addresses ................................................22

Xia, et al.                  Standards Track                    [Page 2]
RFC 8286                RTP Splicing Notification           October 2017

1.  Introduction

   Splicing is a process that replaces some multimedia content with
   other multimedia content and delivers the substitutive multimedia
   content to the receivers for a period of time.  In some predictable
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