RTP Payload Format for Society of Motion Picture and Television Engineers (SMPTE) ST 336 Encoded Data
RFC 6597

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Internet Engineering Task Force (IETF)                     J. Downs, Ed.
Request for Comments: 6597                  PAR Government Systems Corp.
Category: Standards Track                               J. Arbeiter, Ed.
ISSN: 2070-1721                                               April 2012

                         RTP Payload Format for
       Society of Motion Picture and Television Engineers (SMPTE)
                          ST 336 Encoded Data

Abstract

   This document specifies the payload format for packetization of KLV
   (Key-Length-Value) Encoded Data, as defined by the Society of Motion
   Picture and Television Engineers (SMPTE) in SMPTE ST 336, into the
   Real-time Transport Protocol (RTP).

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 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6597.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   described in the Simplified BSD License.

Downs & Arbeiter             Standards Track                    [Page 1]
RFC 6597            RTP Format for SMPTE ST 336 Data          April 2012

Table of Contents

   1. Introduction ....................................................2
   2. Conventions, Definitions, and Acronyms ..........................3
   3. Media Format Background .........................................3
   4. Payload Format ..................................................4
      4.1. RTP Header Usage ...........................................5
      4.2. Payload Data ...............................................5
           4.2.1. The KLVunit .........................................5
           4.2.2. KLVunit Mapping to RTP Packet Payload ...............6
      4.3. Implementation Considerations ..............................6
           4.3.1. Loss of Data ........................................6
                  4.3.1.1. Damaged KLVunits ...........................7
                  4.3.1.2. Treatment of Damaged KLVunits ..............9
   5. Congestion Control ..............................................9
   6. Payload Format Parameters .......................................9
      6.1. Media Type Definition ......................................9
      6.2. Mapping to SDP ............................................10
           6.2.1. Offer/Answer Model and Declarative Considerations ..10
   7. IANA Considerations ............................................11
   8. Security Considerations ........................................11
   9. References .....................................................12
      9.1. Normative References ......................................12
      9.2. Informative References ....................................12

1.  Introduction

   This document specifies the payload format for packetization of KLV
   (Key-Length-Value) Encoded Data, as defined by the Society of Motion
   Picture and Television Engineers (SMPTE) in [SMPTE-ST336], into the
   Real-time Transport Protocol (RTP) [RFC3550].

   The payload format is defined in such a way that arbitrary KLV data
   can be carried.  No restrictions are placed on which KLV data keys
   can be used.

   A brief description of SMPTE ST 336, "Data Encoding Protocol Using
   Key-Length-Value", is given.  The payload format itself, including
   use of the RTP header fields, is specified in Section 4.  The media
   type and IANA considerations are also described.  This document
   concludes with security considerations relevant to this payload
   format.

Downs & Arbeiter             Standards Track                    [Page 2]
RFC 6597            RTP Format for SMPTE ST 336 Data          April 2012

2.  Conventions, Definitions, and Acronyms

   The term "Universal Label Key" is used in this document to refer to a
   fixed-length, 16-byte SMPTE-administered Universal Label (see
   [SMPTE-ST298]) that is used as an identifying key in a KLV item.

   The term "KLV item" is used in this document to refer to one single