This document defines a new RTP Control Protocol (RTCP) Packet Type and an RTCP Extended Report (XR) Block Type to be used for achieving Inter-Destination Media Synchronization (IDMS). IDMS is the process of synchronizing playout across multiple media receivers. Using the RTCP XR IDMS Report Block defined in this document@ media playout information from participants in a synchronization group can be collected. Based on the collected information@ an RTCP IDMS Settings Packet can then be sent to distribute a common target playout point to which all the distributed receivers@ sharing a media experience@ can synchronize. Typical use cases in which IDMS is useful are social TV@ shared service control (i.e.@ applications where two or more geographically separated users are watching a media stream together)@ distance learning@ networked video walls@ networked loudspeakers@ etc.
RFC 7272-2014 history
2014RFC 7272-2014 Inter-Destination Media Synchronization (IDMS) Using the RTP Control Protocol (RTCP)