FEC Framework Working Group M. Watson
Internet-Draft Netflix
Intended status: Standards Track T. Stockhammer
Expires: August 27, 2012 Nomor Research
M. Luby
Qualcomm Incorporated
February 24, 2012
RTP Payload Format for Raptor FEC
draft-ietf-fecframe-rtp-raptor-07
Abstract
This document specifies an RTP Payload Format for Forward Error
Correction repair data produced by the Raptor FEC Schemes. Raptor
FEC Schemes are specified for use with the IETF FEC Framework which
supports transport of repair data over both UDP and RTP. This
document specifies the Payload Format which is required for the use
of RTP to carry Raptor repair flows.
Status of this Memo
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions, Definitions and Acronyms . . . . . . . . . . . . 4
3. Media Format Background . . . . . . . . . . . . . . . . . . . 5
4. Payload Format . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1. RTP Header Usage . . . . . . . . . . . . . . . . . . . . . 6
4.2. Payload Header . . . . . . . . . . . . . . . . . . . . . . 6
4.3. Payload Data . . . . . . . . . . . . . . . . . . . . . . . 6
5. Congestion Control Considerations . . . . . . . . . . . . . . 7
6. Media Types . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1. Registration of the application/raptorfec media type . . . 8
6.1.1. Media Type Definition . . . . . . . . . . . . . . . . 8
6.2. Registration of the video/raptorfec media type . . . . . . 9
6.2.1. Media Type Definition . . . . . . . . . . . . . . . . 9
6.3. Registration of the audio/raptorfec media type . . . . . . 11
6.3.1. Media Type Definition . . . . . . . . . . . . . . . . 11
6.4. Registration of the text/raptorfec media type . . . . . . 13
6.4.1. Media Type Definition . . . . . . . . . . . . . . . . 13
7. Mapping to SDP . . . . . . . . . . . . . . . . . . . . . . . . 15
8. Offer/Answer considerations . . . . . . . . . . . . . . . . . 16
9. Declarative SDP Considerations . . . . . . . . . . . . . . . . 17
10. Repair Flow Generation and Recovery Procedures . . . . . . . . 18
10.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . 18
10.2. Repair Packet Construction . . . . . . . . . . . . . . . . 18
10.3. Usage of RTCP . . . . . . . . . . . . . . . . . . . . . . 18
10.4. Source Packet Reconstruction . . . . . . . . . . . . . . . 19
11. Session Description Protocol (SDP) Example . . . . . . . . . . 20
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 21
13. Security Considerations . . . . . . . . . . . . . . . . . . . 22
14. References . . . . . . . . . . . . . . . . . . . . . . . . . . 23
14.1. Normative References . . . . . . . . . . . . . . . . . . . 23
14.2. Informative References . . . . . . . . . . . . . . . . . . 24
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