The IESG has approved the following document: - 'Guidelines for Implementing DVB-IPTV Application-Layer Hybrid FEC Protection ' <draft-ietf-fecframe-dvb-al-fec-04.txt> as an Informational RFC This document is the product of the FEC Framework Working Group. The IESG contact persons are Magnus Westerlund and Lars Eggert. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-fecframe-dvb-al-fec-04.txt Technical Summary The Annex E of the DVB-IPTV technical specification defines an optional Application-layer Forward Error Correction (AL-FEC) protocol to protect the streaming media carried over RTP transport. The DVB-IPTV AL-FEC protocol uses two layers for FEC protection: 1-D parity code base layer, and a Raptor code enhancement layer. By offering a layered approach, the DVB-IPTV AL-FEC protocol offers a good protection against both bursty and random packet loss at a cost of decent complexity. This document describes how one can implement the DVB-IPTV AL-FEC protocol by using the 1-D interleaved parity code and the Raptor code which are specified in separate documents Working Group Summary There were no seriously contentious issues during the WG process. The only controversy stemmed from some individuals who did the work in SMPTE and defied this approach in the DVB spec, who felt the IETF should not be doing this work. But there were industry requests for an IETF definition of the DVB spec and so this work progressed. Document Quality Any DVB-compliant implementation will be compliant with the DVP-IPTV AL-FEC specification as well. Personal Document Shepherd ? Greg Shepherd Responsible Area Director - Magnus Westerlund
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