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 2016Show full document text