| source                               ^ source 
 | packets                              | packets
 v                                      | 
+--------------+                      +--------------+
|Transport     |               network|Transport     |
|(including CC)|           information|              |
|              |                   <==|              |
+--------------+                      +--------------+
 | network packets                      ^ network packets
 v                                      |
+--------------+                      +--------------+ 
| FEC          |source                |  FEC         |
|              |and/or       signaling|              |
|              |repair       recovered|              |
|              |symbols        symbols|              |
|              |==>                <==|              |
+--------------+                      +--------------+

    SENDER                                RECEIVER