Revision as of 15:02, 7 November 2019 edit Kvng (talk \| contribs) Extended confirmed users, New page reviewers 116,056 edits Adding local short description: "Sister protocol of the Real-time Transport Protocol that provides control information", overriding Wikidata description "computer network protocol" (Shortdesc helper) ← Previous edit		Revision as of 13:52, 20 June 2020 edit undo 94.180.2.179 (talk) →Message types Next edit →
Line 91: RTCP distinguishes several types of packets: ''sender report'', ''receiver report'', ''source description'', and ''goodbye''. In addition, the protocol is extensible and allows application-specific RTCP packets. A standards-based extension of RTCP is the ''extended report'' packet type introduced by RFC 3611.<ref>RFC 3611, ''RTP Control Protocol Extended Reports (RTCP XR)'', T. Friedman (Ed.), R. Caceres, A. Clark (Ed.), The Internet Society (November 2003)</ref> ;Sender report (SR): The sender report is sent periodically by the active senders in a conference to report transmission and reception statistics for all RTP packets sent during the interval. The sender report includes an absolute timestamp, which is the number of seconds elapsed since midnight on January 1, ~~1900~~1970. The absolute timestamp allows the receiver to synchronize RTP messages. It is particularly important when both audio and video are transmitted simultaneously, because audio and video streams use independent relative timestamps. ;Receiver report (RR): The receiver report is for passive participants, those that do not send RTP packets. The report informs the sender and other receivers about the quality of service. ;Source description (SDES): The Source Description message is used to send the CNAME item to session participants. It may also be used to provide additional information such as the name, e-mail address, telephone number, and address of the owner or controller of the source.

RTP Control Protocol: Difference between revisions