RTP Control Protocol (RTCP) Extended Report (XR) Block for Loss Concealment Metrics for Video Applications
RFC 7867
| Document | Type | RFC - Proposed Standard (July 2016; No errata) | |
|---|---|---|---|
| Author | Rachel Huang | ||
| Last updated | 2016-07-29 | ||
| Stream | Internet Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Dan Romascanu | ||
| Shepherd write-up | Show (last changed 2015-11-03) | ||
| IESG | IESG state | RFC 7867 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Alissa Cooper | ||
| Send notices to | "Dan Romascanu" <dromasca@avaya.com> | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) R. Huang
Request for Comments: 7867 Huawei
Category: Standards Track July 2016
ISSN: 2070-1721
RTP Control Protocol (RTCP) Extended Report (XR) Block
for Loss Concealment Metrics for Video Applications
Abstract
This document defines a new RTP Control Protocol (RTCP) Extended
Report (XR) block that allows the reporting of loss concealment
metrics for video applications of RTP.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc7867.
Copyright Notice
Copyright (c) 2016 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Huang Standards Track [Page 1]
RFC 7867 Video LC Metrics for RTCP XR July 2016
Table of Contents
1. Introduction ....................................................2
1.1. RTCP and RTCP XR Reports ...................................3
1.2. Performance Metrics Framework ..............................3
1.3. Applicability ..............................................3
2. Terminology .....................................................3
3. Video Loss Concealment Methods ..................................3
4. Video Loss Concealment Report Block .............................4
5. SDP Signaling ...................................................8
5.1. SDP rtcp-xr-attrib Attribute Extension .....................8
5.2. Offer/Answer Usage .........................................9
6. Security Considerations .........................................9
7. IANA Considerations .............................................9
7.1. New RTCP XR Block Type Value ...............................9
7.2. New RTCP XR SDP Parameter ..................................9
7.3. Contact Information for Registrations .....................10
8. References .....................................................10
8.1. Normative References ......................................10
8.2. Informative References ....................................11
Appendix A. Metrics Represented Using the Template from RFC 6390 ..12
Acknowledgements ..................................................16
Authors' Addresses ................................................16
1. Introduction
Multimedia applications often suffer from packet losses in IP
networks. In order to get a reasonable degree of quality when there
is packet loss, it is necessary to have loss concealment mechanisms
at the decoder. Video loss concealment is a range of techniques to
mask the effects of packet loss in video communications.
In some applications, reporting the information of receivers applying
video loss concealment could give monitors or senders useful
information on the Quality of Experience (QoE) of the application.
One example is no-reference video quality evaluation. Video probes
located upstream from the video endpoint or terminal may not see loss
occurring between the probe and the endpoint, and also may not be
fully aware of the specific loss concealment methods being
dynamically applied by the video endpoint. Evaluating error
concealment is important in this circumstance to estimate the
subjective impact of impairments.
This document defines one new block type for video loss concealment
to augment those defined in [RFC3611] and [RFC7294] for use in a
range of RTP video applications. The metrics defined in this
document belong to the class of transport-related terminal metrics
defined in [RFC6792].
Huang Standards Track [Page 2]
RFC 7867 Video LC Metrics for RTCP XR July 2016
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