ocr: RTP HEADER - 5 - 16 31 BR % CC M. Payloadtypel (7! bits) Sequence number (156its) ume stamp Synchrontzation source: (SSRC) Identifier contributing source (CSRC) Identitier Varying number of CSRC fields Contributing source dentifiler VeVersicn(2aits) PaPadding (Tbitt XExtersion Mbits CC- CSRCoUnt4E bits) M Markeribte Figure 1. This fixed RTP header contarns a number offields which idenrify such elements as a packets format, sequence, sources, poundaries, and RTP payload type. Other fields, witich provide additional information On the data, may follow the fixed header.