Network Working Group H. Schulzrinne
Request for Comments: 3551 Columbia University
Obsoletes: 1890 S. Casner
Category: Standards Track Packet Design
July 2003
RTP Profile for Audio and Video Conferences with Minimal Control
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.
Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
This document describes a profile called “RTP/AVP” for the use of the real-time transport protocol
(RTP), version 2, and the associated control protocol, RTCP, within audio and video multipartici-
pant conferences with minimal control. It provides interpretations of generic fields within the RTP
specification suitable for audio and video conferences. In particular, this document defines a set of
default mappings from payload type numbers to encodings.
This document also describes how audio and video data may be carried within RTP. It defines a set
of standard encodings and their names when used within RTP. The descriptions provide pointers
to reference implementations and the detailed standards. This document is meant as an aid for
implementors of audio, video and other real-time multimedia applications.
This memorandum obsoletes RFC 1890. It is mostly backwards-compatible except for functions
removed because two interoperable implementations were not found. The additions to RFC 1890
codify existing practice in the use of payload formats under this profile and include new payload
formats defined since RFC 1890 was published.
Schulzrinne & Casner Standards Track [Page 1]
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