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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.
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Network Working Group� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � J. Sjoberg

Request for Comments: 3267� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � M. Westerlund

Category: Standards Track� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Ericsson

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� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Nokia

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� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 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...