RFC 2032 (rfc2032) - Page 1 of 11

RTP Payload Format for H

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Network Working Group                                        T. Turletti
Request for Comments: 2032                                           MIT
Category: Standards Track                                     C. Huitema
                                                                Bellcore
                                                            October 1996


               RTP Payload Format for H.261 Video Streams

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Table of Contents

   1. Abstract .............................................    1
   2. Purpose of this document .............................    2
   3. Structure of the packet stream .......................    2
   3.1 Overview of the ITU-T recommendation H.261 ..........    2
   3.2 Considerations for packetization ....................    3
   4. Specification of the packetization scheme ............    4
   4.1 Usage of RTP ........................................    4
   4.2 Recommendations for operation with hardware codecs ..    6
   5. Packet loss issues ...................................    7
   5.1 Use of optional H.261-specific control packets ......    8
   5.2 H.261 control packets definition ....................    9
   5.2.1 Full INTRA-frame Request (FIR) packet .............    9
   5.2.2 Negative ACKnowledgements (NACK) packet ...........    9
   6. Security Considerations ..............................   10
    Authors' Addresses .....................................   10
    Acknowledgements .......................................   10
    References .............................................   11

1.  Abstract

   This memo describes a scheme to packetize an H.261 video stream for
   transport using the Real-time Transport Protocol, RTP, with any of
   the underlying protocols that carry RTP.

   This specification is a product of the Audio/Video Transport working
   group within the Internet Engineering Task Force.  Comments are
   solicited and should be addressed to the working group's mailing list
   at  and/or the authors.




Turletti & Huitema          Standards Track
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