V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

RTP
       Real Time Protocol (Internet, RFC 1889/1890, RTCP)


The Free On-line Dictionary of Computing (30 December 2018):

Real-Time Transport Protocol
RTP

    (RTP) An Internet protocol for transmitting
   real-time data such as audio and video.  RTP itself does
   not guarantee real-time delivery of data, but it does provide
   mechanisms for the sending and receiving applications to
   support streaming data.  Typically, RTP runs on top of the
   UDP protocol, although the specification is general enough
   to support other transport protocols.

   RTP has received wide industry support.  Netscape intends to
   base its LiveMedia technology on RTP, and Microsoft claims
   that its NetMeeting product supports RTP.

   (2003-07-06)