The Layer Refresh Request RTCP Feedback Message
RFC 9627, “The Layer Refresh Request RTCP Feedback Message”, is a Proposed Standard document published in March 2025 by J. Lennox, D. Hong, J. Uberti, S. Holmer, M. Flodman. The canonical text is published by the RFC Editor.
Abstract
This memo describes the RTCP Payload-Specific Feedback Message Layer Refresh Request (LRR), which can be used to request a state refresh of one or more substreams of a layered media stream. This document also defines its use with several RTP payloads for scalable media formats.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9627 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
- RFC 9626 Video Frame Marking RTP Header Extension
- RFC 9628 RTP Payload Format for VP9 Video
- RFC 9623 Implementing Interfaces to Transport Services
- RFC 9622 An Abstract Application Programming Interface for Transport Services
- RFC 9621 Architecture and Requirements for Transport Services
- RFC 9609 Initializing a DNS Resolver with Priming Queries
- RFC 9664 An EDNS Option to Negotiate Leases on DNS Updates
- RFC 9665 Service Registration Protocol for DNS-Based Service Discovery