Technical Summary
In situations where packet loss is high or perfect media quality is
essential, Forward Error Correction (FEC) can be used to proactively
recover from packet losses. This specification provides guidance on
which FEC mechanisms to use, and how to use them, for WebRTC
implementations.
Working Group Summary
The working group support for the document was generally high. One
issued was raised in working group last call regarding the
effectiveness of the Opus internal FEC mechanism. The document
currently states that it is RECOMMENDED for protection against
individual packet loss and that other methods are needed for
multi-packet protection. This mirrors text in RFC 6716 and
accurately captures a limitation of the in-band FEC mechanism. The
question of effectiveness is thus tightly tied to the loss pattern.
While data on this was presented, there was no evident consensus to
update the requirement, so the recommendation from RFC 6716 was
retained.
Document Quality
This document appears to have the support of the relevant development
community and will likely be implemented and deployed. Reviews by Mo
Zanaty, Magnus Westerlund, and Bernard Aboba were particularly helpful.
Personnel
Ted Hardie is the Document Shepherd. Adam Roach is the Responsible Area
Director.