http://www.rfc-editor.org/rfc/rfc6798.txt
RFC 6798: RTP Control Protocol (RTCP) Extended Report (XR) Block for Packet Delay Variation Metric Reporting, A. Clark, Q. Wu2012-11-01T23:00:00-00:00This document defines an RTP Control Protocol (RTCP) Extended Report (XR) block that allows the reporting of packet delay variation metrics for a range of RTP applications. [STANDARDS-TRACK]