3.1.5 Message Processing Events and Sequencing Rules
RTPME processes RTP-related packets as specified in [RFC3550] and [RFC3551], with the following additional notes:
For every received RTP packet, the participant timeout timer of the participant respective to its SSRC MUST be restarted.
The following actions SHOULD be executed on receipt of every RTP packet.
IF LastGoodSSRC != 0 THEN IF SSRC != LastGoodSSRC THEN Drop Packet ENDIF ELSE LastGoodSSRC = SSRC ENDIF