2.2.2 RTCP Compound Packets

RTCP compound packets are a concatenation of simple RTCP packets, as specified in [RFC3550] section 6. However, RTCP SDES, RTCP BYE, RTCP SR and RTCP RR can also be sent as simple packets, which mean they are sent as only one RTCP packet, instead of a concatenation of two or more. Accordingly, this protocol modifies the RTCP validation algorithm in [RFC3550] section A.2 to accept simple RTCP SDES, RTCP BYE, RTCP SR and RTCP RR packets. RTCP compound packets can carry one or more of the RTCP profile specific extensions described in section 2.2.11.