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Real-Time Transport Protocol (RTP) Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) Audio Codecs (RFC3267)

IP.com Disclosure Number: IPCOM000009212D
Original Publication Date: 2002-Jun-01
Included in the Prior Art Database: 2002-Aug-13

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Sjoberg: AUTHOR [+4]

Abstract

This document specifies a real-time transport protocol (RTP) payload format to be used for Adaptive Multi-Rate (AMR) and Adaptive Multi- Rate Wideband (AMR-WB) encoded speech signals. The payload format is designed to be able to interoperate with existing AMR and AMR-WB transport formats on non-IP networks. In addition, a file format is specified for transport of AMR and AMR-WB speech data in storage mode applications such as email. Two separate MIME type registrations are included, one for AMR and one for AMR-WB, specifying use of both the RTP payload format and the storage format.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 2% of the total text.

Network Working Group                                         J. Sjoberg

Request for Comments: 3267                                 M. Westerlund

Category: Standards Track                                       Ericsson

                                                            A. Lakaniemi

                                                                   Nokia

                                                                  Q. Xie

                                                                Motorola

                                                               June 2002

   Real-Time Transport Protocol (RTP) Payload Format and File Storage

    Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate

                     Wideband (AMR-WB) Audio Codecs

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 (2002).  All Rights Reserved.

Abstract

   This document specifies a real-time transport protocol (RTP) payload

   format to be used for Adaptive Multi-Rate (AMR) and Adaptive Multi-

   Rate Wideband (AMR-WB) encoded speech signals.  The payload format is

   designed to be able to interoperate with existing AMR and AMR-WB

   transport formats on non-IP networks.  In addition, a file format is

   specified for transport of AMR and AMR-WB speech data in storage mode

   applications such as email.  Two separate MIME type registrations are

   included, one for AMR and one for AMR-WB, specifying use of both the

   RTP payload format and the storage format.

Sjoberg, et. al.            Standards Track                     [Page 1]

RFC 3267        RTP Payload Format for AMR and AMR-WB          June 2002

Table of Contents

   1. Introduction.................................................... 3

   2. Conventions and Acronyms........................................ 3

   3. Background on AMR/AMR-WB and Design Principles.................. 4

     3.1. The Adaptive Multi-Rate (AMR) Speech Codec.................. 4

     3.2. The Adaptive Multi-Rate Wideband (AMR-WB) Speech Codec...... 5

     3.3. Multi-rate Encoding and Mode Adaptation..................... 5

     3.4. Voice Acti...