Using Codec Control Messages in the RTP Audio-Visual Profile with Feedback with Layered Codecs
draft-ietf-avtext-avpf-ccm-layered-04

Document Type Active Internet-Draft (avtext WG)
Last updated 2017-01-10
Replaces draft-wenger-avtext-avpf-ccm-layered
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Stream WG state Submitted to IESG for Publication Dec 2016
Document shepherd Rachel Huang
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Network Working Group                                          S. Wenger
Internet-Draft                                                 J. Lennox
Updates: 5104 (if approved)                                  Vidyo, Inc.
Intended status: Standards Track                               B. Burman
Expires: July 14, 2017                                     M. Westerlund
                                                                Ericsson
                                                        January 10, 2017

   Using Codec Control Messages in the RTP Audio-Visual Profile with
                      Feedback with Layered Codecs
                 draft-ietf-avtext-avpf-ccm-layered-04

Abstract

   This document updates RFC5104 by fixing a shortcoming in the
   specification language of the Codec Control Message Full Intra
   Request (FIR) as defined in RFC5104 when using it with layered
   codecs.  In particular, a Decoder Refresh Point needs to be sent by a
   media sender when a FIR is received on any layer of the layered
   bitstream, regardless on whether those layers are being sent in a
   single or in multiple RTP flows.  The other payload-specific feedback
   messages defined in RFC 5104 and RFC 4585 as updated by RFC 5506 have
   also been analyzed, and no corresponding shortcomings have been
   found.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on July 14, 2017.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Wenger, et al.            Expires July 14, 2017                 [Page 1]
Internet-Draft                 CCM-Layered                  January 2017

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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction and Problem Statement  . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  Updated definition of Decoder Refresh Point . . . . . . . . .   4
   4.  Full Intra Request for Layered Codecs . . . . . . . . . . . .   5
   5.  Identifying the use of layered bitstreams (Informative) . . .   5
   6.  Layered Codecs and non-FIR codec control messages
       (Informative) . . . . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  Picture Loss Indication (PLI) . . . . . . . . . . . . . .   6
     6.2.  Slice Loss Indication (SLI) . . . . . . . . . . . . . . .   6
     6.3.  Reference Picture Selection Indication (RPSI) . . . . . .   7
     6.4.  Temporal-Spatial Trade-off Request and Notification
           (TSTR/TSTN) . . . . . . . . . . . . . . . . . . . . . . .   7
     6.5.  H.271 Video Back Channel Message (VBCM) . . . . . . . . .   8
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   8
     10.2.  Informative References . . . . . . . . . . . . . . . . .   9
   Appendix A.  Change Log . . . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction and Problem Statement

   The Extended RTP Profile for Real-time Transport Control Protocol
   (RTCP)-Based Feedback (RTP/AVPF) [RFC4585] and Codec Control Messages
   in the RTP Audio-Visual Profile with Feedback (AVPF) [RFC5104]
   specify a number of payload-specific feedback messages which a media
   receiver can use to inform a media sender of certain conditions, or
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