| source ^ source | packets | packets v | +-------------+ +-------------+ |FEC | signaling|FEC | | | recovered| | | | symbols| | | | <==| | +-------------+ +-------------+ | source ^ ^ source | and/or | sending | and/or | repair | rate | repair | symbols | (or window) | symbols v | | +-------------+ +-------------+ |Transport | network|Transport | |(incl. CC) | information| | | |network <==| | | |packets | | +-------------+==> +-------------+ SENDER RECEIVER