RTP-based Systems
A complete network based system will include other protocols and standards in conjunction with RTP. Protocols like SIP, RTSP, H.225 and H.245 are used for session initiation, control and termination. Other standards like H.264, MPEG, H.263 etc., are used to encode the payload data as specified via RTP Profile.
An RTP sender captures the multimedia data, which is then encoded, framed and transmitted as RTP packets with appropriate timestamps and increasing sequence numbers. Depending on the RTP Profile in use, the Payload Type field is set. The RTP receiver captures the RTP packets, detects missing packets, and may perform reordering of packets. The frames are decoded depending on the payload format and presented to the end user.
Read more about this topic: Real-time Transport Protocol
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