RFC 9627: The Layer Refresh Request (LRR) RTCP Feedback Message, J. Lennox, et al., rfc-editor.org/info/rfc9627 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 1/2

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