RFC 3047 (rfc3047) - Page 1 of 8

RTP Payload Format for ITU-T Recommendation G

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Network Working Group                                           P. Luthi
Request for Comments: 3047                                    PictureTel
Category: Standards Track                                   January 2001


          RTP Payload Format for ITU-T Recommendation G.722.1

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 (2001).  All Rights Reserved.

Abstract

   International Telecommunication Union (ITU-T) Recommendation G.722.1
   is a wide-band audio codec, which operates at one of two selectable
   bit rates, 24kbit/s or 32kbit/s.  This document describes the payload
   format for including G.722.1 generated bit streams within an RTP
   packet.  Also included here are the necessary details for the use of
   G.722.1 with MIME and SDP.

1. Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC-2119 [6].

2. Overview of ITU-T Recommendation G.722.1

   G.722.1 is a low complexity coder, it compresses 50Hz - 7kHz audio
   signals into one of two bit rates, 24 kbit/s or 32 kbit/s.

   The coder may be used for speech, music and other types of audio.

   Some of the applications for which this coder is suitable are:

   o  Real-time communications such as videoconferencing and telephony.
   o  Streaming audio
   o  Archival and messaging





Luthi                       Standards Track
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