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Discarding Priority of RTP Video Packets

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Lijun Dong , Richard Li , Stuart Clayman , Muge Sayit
Last updated 2023-01-11 (Latest revision 2022-07-10)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document illustrates that significance difference or discarding priority might exist among RTP packets which encapsulate video streaming data with the existing modern video codecs, i.e., H.264/ AVC, SVC, H.265/HEVC and H.266/VVC. The document overviews the RTP NALU header format for the existing modern video codecs. Each contains at least one field that indicates the RTP packet's relative significance within the video stream. With the dominance of video traffic in the Internet, selectively dropping RTP packets from competing video streams according to their significances or discarding priorities could be a complementary mechanism when dealing with network congestion. The document proposes the Differentiated Services Code Point (DSCP) value mapping to the RTP packet discarding priority carried in the RTP NALU header. The document also proposes a new Hop-by-Hop Extension Header (HbH-EH) with a value that is copied from the discarding priority of the RTP packet, if the 6-bit DSCP value is not long enough for the mapping.


Lijun Dong
Richard Li
Stuart Clayman
Muge Sayit

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)