Extended RTP Profile for Real-time Transport Control Protocol -Based Feedback
RFC 4585, “Extended RTP Profile for Real-time Transport Control Protocol -Based Feedback”, is a Proposed Standard document published in July 2006 by J. Ott, S. Wenger, N. Sato, C. Burmeister, J. Rey. It has since been updated by RFC 5506, RFC 8108. The canonical text is published by the RFC Editor.
Abstract
Real-time media streams that use RTP are, to some degree, resilient against packet losses. Receivers may use the base mechanisms of the Real-time Transport Control Protocol (RTCP) to report packet reception statistics and thus allow a sender to adapt its transmission behavior in the mid-term. This is the sole means for feedback and feedback-based error repair (besides a few codec-specific mechanisms). This document defines an extension to the Audio-visual Profile (AVP) that enables receivers to provide, statistically, more immediate feedback to the senders and thus allows for short-term adaptation and efficient feedback-based repair mechanisms to be implemented. This early feedback profile (AVPF) maintains the AVP bandwidth constraints for RTCP and preserves scalability to large groups. [STANDARDS-TRACK]
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 4585 is hosted at rfc-editor.org. Available in TXT,HTML.
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- RFC 4582 The Binary Floor Control Protocol
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