RTP Payload Format Restrictions
draft-ietf-mmusic-rid-11

Document Type Active Internet-Draft (mmusic WG)
Last updated 2017-07-28 (latest revision 2017-07-19)
Replaces draft-pthatcher-mmusic-rid
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state WG Consensus: Waiting for Write-Up (wg milestone: Aug 2017 - Submit RTP Payload F... )
Revised I-D Needed - Issue raised by WG
Document shepherd Flemming Andreasen
IESG IESG state I-D Exists
Consensus Boilerplate Yes
Telechat date
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Send notices to "Flemming Andreasen" <fandreas@cisco.com>
Network Working Group                                        P. Thatcher
Internet-Draft                                                    Google
Updates: 4855 (if approved)                                    M. Zanaty
Intended status: Standards Track                           S. Nandakumar
Expires: January 20, 2018                                  Cisco Systems
                                                               B. Burman
                                                                Ericsson
                                                                A. Roach
                                                               B. Campen
                                                                 Mozilla
                                                           July 19, 2017

                    RTP Payload Format Restrictions
                        draft-ietf-mmusic-rid-11

Abstract

   In this specification, we define a framework for specifying
   restrictions on RTP streams in the Session Description Protocol.
   This framework defines a new "rid" SDP attribute to unambiguously
   identify the RTP Streams within a RTP Session and restrict the
   streams' payload format parameters in a codec-agnostic way beyond
   what is provided with the regular Payload Types.

   This specification updates RFC4855 to give additional guidance on
   choice of Format Parameter (fmtp) names, and on their relation to the
   restrictions defined by this document.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 20, 2018.

Thatcher, et al.        Expires January 20, 2018                [Page 1]
Internet-Draft              RTP Restrictions                   July 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Key Words for Requirements  . . . . . . . . . . . . . . . . .   4
   4.  SDP "a=rid" Media Level Attribute . . . . . . . . . . . . . .   4
   5.  "a=rid" restrictions  . . . . . . . . . . . . . . . . . . . .   6
   6.  SDP Offer/Answer Procedures . . . . . . . . . . . . . . . . .   7
     6.1.  Generating the Initial SDP Offer  . . . . . . . . . . . .   8
     6.2.  Answerer processing the SDP Offer . . . . . . . . . . . .   9
       6.2.1.  "a=rid"-unaware Answerer  . . . . . . . . . . . . . .   9
       6.2.2.  "a=rid"-aware Answerer  . . . . . . . . . . . . . . .   9
     6.3.  Generating the SDP Answer . . . . . . . . . . . . . . . .  10
     6.4.  Offerer Processing of the SDP Answer  . . . . . . . . . .  11
     6.5.  Modifying the Session . . . . . . . . . . . . . . . . . .  12
   7.  Use with Declarative SDP  . . . . . . . . . . . . . . . . . .  12
   8.  Interaction with Other Techniques . . . . . . . . . . . . . .  12
     8.1.  Interaction with VP8 Format Parameters  . . . . . . . . .  13
       8.1.1.  max-fr - Maximum Framerate  . . . . . . . . . . . . .  13
       8.1.2.  max-fs - Maximum Framesize, in VP8 Macroblocks  . . .  14
     8.2.  Interaction with H.264 Format Parameters  . . . . . . . .  14
       8.2.1.  profile-level-id and max-recv-level - Negotiated Sub-
               Profile . . . . . . . . . . . . . . . . . . . . . . .  15
       8.2.2.  max-br / MaxBR - Maximum Video Bitrate  . . . . . . .  15
       8.2.3.  max-fs / MaxFS - Maximum Framesize, in H.264
               Macroblocks . . . . . . . . . . . . . . . . . . . . .  16
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