RTP Payload Format for VP9 Video
draft-ietf-payload-vp9-11

Document Type Active Internet-Draft (avtcore WG)
Authors Justin Uberti  , Stefan Holmer  , Magnus Flodman  , Danny Hong  , Jonathan Lennox 
Last updated 2021-02-08 (latest revision 2021-02-02)
Replaces draft-uberti-payload-vp9
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Waiting for WG Chair Go-Ahead (wg milestone: Nov 2019 - Submit RTP Payload F... )
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Document shepherd Bernard Aboba
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Send notices to bernard.aboba@gmail.com
AVTCore Working Group                                          J. Uberti
Internet-Draft                                                 S. Holmer
Intended status: Standards Track                              M. Flodman
Expires: 6 August 2021                                           D. Hong
                                                                  Google
                                                               J. Lennox
                                                             8x8 / Jitsi
                                                         2 February 2021

                    RTP Payload Format for VP9 Video
                       draft-ietf-payload-vp9-11

Abstract

   This memo describes an RTP payload format for the VP9 video codec.
   The payload format has wide applicability, as it supports
   applications from low bit-rate peer-to-peer usage, to high bit-rate
   video conferences.  It includes provisions for temporal and spatial
   scalability.

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 6 August 2021.

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   Copyright (c) 2021 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   Please review these documents carefully, as they describe your rights
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Uberti, et al.            Expires 6 August 2021                 [Page 1]
Internet-Draft         RTP Payload Format for VP9          February 2021

   extracted from this document must include Simplified BSD License text
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions, Definitions and Acronyms . . . . . . . . . . . .   3
   3.  Media Format Description  . . . . . . . . . . . . . . . . . .   3
   4.  Payload Format  . . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  RTP Header Usage  . . . . . . . . . . . . . . . . . . . .   5
     4.2.  VP9 Payload Descriptor  . . . . . . . . . . . . . . . . .   6
       4.2.1.  Scalability Structure (SS): . . . . . . . . . . . . .  11
     4.3.  Frame Fragmentation . . . . . . . . . . . . . . . . . . .  12
     4.4.  Scalable encoding considerations  . . . . . . . . . . . .  13
     4.5.  Examples of VP9 RTP Stream  . . . . . . . . . . . . . . .  13
       4.5.1.  Reference picture use for scalable structure  . . . .  13
   5.  Feedback Messages and Header Extensions . . . . . . . . . . .  14
     5.1.  Reference Picture Selection Indication (RPSI) . . . . . .  14
     5.2.  Full Intra Request (FIR)  . . . . . . . . . . . . . . . .  15
     5.3.  Layer Refresh Request (LRR) . . . . . . . . . . . . . . .  15
   6.  Payload Format Parameters . . . . . . . . . . . . . . . . . .  16
     6.1.  Media Type Definition . . . . . . . . . . . . . . . . . .  16
     6.2.  SDP Parameters  . . . . . . . . . . . . . . . . . . . . .  18
       6.2.1.  Mapping of Media Subtype Parameters to SDP  . . . . .  19
       6.2.2.  Offer/Answer Considerations . . . . . . . . . . . . .  19
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  20
   8.  Congestion Control  . . . . . . . . . . . . . . . . . . . . .  20
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  21
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  21
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  21
     11.2.  Informative References . . . . . . . . . . . . . . . . .  22
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  23

1.  Introduction

   This memo describes an RTP payload specification applicable to the
   transmission of video streams encoded using the VP9 video codec
   [VP9-BITSTREAM].  The format described in this document can be used
   both in peer-to-peer and video conferencing applications.

   The VP9 video codec was developed by Google, and is the successor to
   its earlier VP8 [RFC6386] codec.  Above the compression improvements
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