{
  "draft": "draft-ietf-avt-rtcp-feedback-11",
  "doc_id": "RFC4585",
  "title": "Extended RTP Profile for Real-time Transport Control Protocol (RTCP)-Based Feedback (RTP/AVPF)",
  "authors": [
    "J. Ott",
    "S. Wenger",
    "N. Sato",
    "C. Burmeister",
    "J. Rey"
  ],
  "format": [
    "TEXT",
    "HTML"
  ],
  "page_count": "51",
  "pub_status": "PROPOSED STANDARD",
  "status": "PROPOSED STANDARD",
  "source": "Audio/Video Transport",
  "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]",
  "pub_date": "July 2006",
  "keywords": [
    "media stream",
    "feedback based error",
    "audio visual profile"
  ],
  "obsoletes": [],
  "obsoleted_by": [],
  "updates": [],
  "updated_by": [
    "RFC5506",
    "RFC8108"
  ],
  "see_also": [],
  "doi": "10.17487/RFC4585",
  "errata_url": "https://www.rfc-editor.org/errata/rfc4585"
}