RTP Payload Format for VP9 Video
draft-ietf-payload-vp9-10

Document Type Active Internet-Draft (avtcore WG)
Last updated 2020-07-07
Replaces draft-uberti-payload-vp9
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AVTCore Working Group                                          J. Uberti
Internet-Draft                                                 S. Holmer
Intended status: Standards Track                              M. Flodman
Expires: January 8, 2021                                         D. Hong
                                                                  Google
                                                               J. Lennox
                                                             8x8 / Jitsi
                                                            July 7, 2020

                    RTP Payload Format for VP9 Video
                       draft-ietf-payload-vp9-10

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 January 8, 2021.

Copyright Notice

   Copyright (c) 2020 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

Uberti, et al.           Expires January 8, 2021                [Page 1]
Internet-Draft         RTP Payload Format for VP9              July 2020

   to this document.  Code Components extracted from this document must
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   described in the Simplified BSD License.

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 . . . . . . . . . . . . . . . . . . .  13
     4.4.  Scalable encoding considerations  . . . . . . . . . . . .  13
     4.5.  Examples of VP9 RTP Stream  . . . . . . . . . . . . . . .  14
       4.5.1.  Reference picture use for scalable structure  . . . .  14
   5.  Feedback Messages and Header Extensions . . . . . . . . . . .  14
     5.1.  Reference Picture Selection Indication (RPSI) . . . . . .  15
     5.2.  Full Intra Request (FIR)  . . . . . . . . . . . . . . . .  15
     5.3.  Layer Refresh Request (LRR) . . . . . . . . . . . . . . .  15
     5.4.  Frame Marking . . . . . . . . . . . . . . . . . . . . . .  16
   6.  Payload Format Parameters . . . . . . . . . . . . . . . . . .  17
     6.1.  Media Type Definition . . . . . . . . . . . . . . . . . .  17
     6.2.  SDP Parameters  . . . . . . . . . . . . . . . . . . . . .  19
       6.2.1.  Mapping of Media Subtype Parameters to SDP  . . . . .  19
       6.2.2.  Offer/Answer Considerations . . . . . . . . . . . . .  20
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  20
   8.  Congestion Control  . . . . . . . . . . . . . . . . . . . . .  21
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  21
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  21
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  21
     11.2.  Informative References . . . . . . . . . . . . . . . . .  23
   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
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