|            ^             |             ^
  | source     | coding      |packets      | sending
  | packets    | rate        |requirements | rate (or
  v            |             v             | window)
+---------------+source     +-----------------+
|    FEC        |and/or     |    CC           |
|               |repair     |                 |network 
|               |symbols    |                 |packets
+---------------+==>        +-----------------+==>
  ^                                       ^
  | signaling                             | network
  | recovered symbols                     | information