RTP Payload Format for H.264 Reduced-Complexity Decoding Operation (RCDO) Video
RFC 6185

Internet Engineering Task Force (IETF)                     T. Kristensen
Request for Comments: 6185                                      P. Luthi
Category: Standards Track                                       TANDBERG
ISSN: 2070-1721                                                 May 2011

                         RTP Payload Format for
        H.264 Reduced-Complexity Decoding Operation (RCDO) Video

Abstract

   This document describes an RTP payload format for the Reduced-
   Complexity Decoding Operation (RCDO) for H.264 Baseline profile
   bitstreams, as specified in ITU-T Recommendation H.241.  RCDO reduces
   the decoding cost and resource consumption of the video processing.
   The RCDO RTP payload format is based on the H.264 RTP payload format.

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/rfc6185.

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Kristensen & Luthi           Standards Track                    [Page 1]
RFC 6185                 H.264 RCDO RTP Payload                 May 2011

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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Conventions Used in This Document  . . . . . . . . . . . . . .  3
   3.  Media Format Background  . . . . . . . . . . . . . . . . . . .  3
   4.  Payload Format . . . . . . . . . . . . . . . . . . . . . . . .  3
   5.  Congestion Control Considerations  . . . . . . . . . . . . . .  3
   6.  Payload Format Parameters  . . . . . . . . . . . . . . . . . .  3
     6.1.  Media Type Definition  . . . . . . . . . . . . . . . . . .  4
   7.  Mapping to SDP . . . . . . . . . . . . . . . . . . . . . . . . 19
     7.1.  Offer/Answer Considerations  . . . . . . . . . . . . . . . 20
     7.2.  Declarative SDP Considerations . . . . . . . . . . . . . . 20
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 20
   9.  Security Considerations  . . . . . . . . . . . . . . . . . . . 20
   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 21
   11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 21
     11.1. Normative References . . . . . . . . . . . . . . . . . . . 21
     11.2. Informative References . . . . . . . . . . . . . . . . . . 21

1.  Introduction

   ITU-T Recommendation H.241 [3] specifies a Reduced-Complexity
   Decoding Operation (RCDO) for use with H.264 [2] Baseline profile
   bitstreams.  It also specifies a bitstream constraint associated with
   RCDO and a mechanism for signaling RCDO within the bitstream.  The
   RCDO signaling indicates that the bitstream conforms to the bitstream
   constraint and that the decoder shall apply the RCDO decoding process
   to the bitstream.

   RCDO for H.264 offers a solution to support higher resolutions at the
   same high frame rates used in current implementations.  This is
   achieved by reducing the processing requirements and thus reducing
   the decoding cost/resource consumption of the video processing.