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A More Loss-Tolerant RTP Payload Format for MP3 Audio (RFC5219)

IP.com Disclosure Number: IPCOM000167482D
Original Publication Date: 2008-Feb-01
Included in the Prior Art Database: 2008-Feb-15
Document File: 23 page(s) / 43K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Finlayson: AUTHOR

Abstract

This document describes an RTP (Real-Time Protocol) payload format for transporting MPEG (Moving Picture Experts Group) 1 or 2, layer III audio (commonly known as "MP3"). This format is an alternative to that described in RFC 2250, and performs better if there is packet loss. This document obsoletes RFC 3119, correcting typographical errors in the "SDP usage" section and pseudo-code appendices.

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Network Working Group                                       R. Finlayson Request for Comments: 5219                           Live Networks, Inc. Obsoletes: 3119                                            February 2008 Category: Standard Track

          A More Loss-Tolerant RTP Payload Format for MP3 Audio

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.

Abstract

   This document describes an RTP (Real-Time Protocol) payload format    for transporting MPEG (Moving Picture Experts Group) 1 or 2, layer    III audio (commonly known as "MP3").  This format is an alternative    to that described in RFC 2250, and performs better if there is packet    loss.  This document obsoletes RFC 3119, correcting typographical    errors in the "SDP usage" section and pseudo-code appendices.

Finlayson                   Standards Track                     [Page 1]
 RFC 5219                                                   February 2008

 Table of Contents

   1. Introduction ....................................................2

   2. Terminology .....................................................3

   3. The Structure of MP3 Frames .....................................3

   4. A New Payload Format ............................................4

      4.1. ADU Frames .................................................4

      4.2. ADU Descriptors ............................................4

      4.3. Packing Rules ..............................................5

      4.4. RTP Header Fields ..........................................6

      4.5. Handling Received Data .....................................6

   5. Handling Multiple MPEG Audio Layers .............................6

   6. Frame Packetizing and Depacketizing .............................7

   7. ADU Frame Interleaving ..........................................8

   8. IANA Considerations ............................................10

   9. SDP Usage ......................................................11

   10. Security Considerations .......................................11

   11. Acknowledgements ..............................................11

   12. Normative References ..........................................12

   Appendix A. Translating between "MP3 Frames" and "ADU Frames" .....13

      A.1. Converting a Sequence of "MP3 Frames"

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