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RFC 8627
Title: RTP Payload Format for Flexible
Forward Error Correction (FEC)
Author: M. Zanaty,
V. Singh,
A. Begen,
G. Mandyam
Status: Standards Track
Stream: IETF
Date: July 2019
Mailbox: [email protected],
[email protected],
[email protected],
[email protected]
Pages: 41
Characters: 92366
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-payload-flexible-fec-scheme-20.txt
URL: https://www.rfc-editor.org/info/rfc8627
DOI: 10.17487/RFC8627
This document defines new RTP payload formats for the Forward Error
Correction (FEC) packets that are generated by the non-interleaved
and interleaved parity codes from source media encapsulated in RTP.
These parity codes are systematic codes (Flexible FEC, or "FLEX
FEC"), where a number of FEC repair packets are generated from a set
of source packets from one or more source RTP streams. These FEC
repair packets are sent in a redundancy RTP stream separate from the
source RTP stream(s) that carries the source packets. RTP source
packets that were lost in transmission can be reconstructed using the
source and repair packets that were received. The non-interleaved
and interleaved parity codes that are defined in this specification
offer a good protection against random and bursty packet losses,
respectively, at a cost of complexity. The RTP payload formats that
are defined in this document address scalability issues experienced
with the earlier specifications and offer several improvements. Due
to these changes, the new payload formats are not backward compatible
with earlier specifications; however, endpoints that do not implement
this specification can still work by simply ignoring the FEC repair
packets.
This document is a product of the Audio/Video Transport Payloads Working Group
of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: 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 Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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