draft-ietf-xrblock-rtcp-xr-video-lc-02.txt   draft-ietf-xrblock-rtcp-xr-video-lc-03.txt 
XRBLOCK R. Huang XRBLOCK R. Huang
INTERNET-DRAFT Huawei INTERNET-DRAFT Huawei
Intended Status: Standards Track A. Clark Intended Status: Standards Track A. Clark
Expires: March 14, 2016 Telchemy Expires: May 5, 2016 Telchemy
September 11, 2015 November 2, 2015
RTCP XR Report Block for Loss Concealment Metrics Reporting on RTCP XR Report Block for Loss Concealment Metrics Reporting on
Video Applications Video Applications
draft-ietf-xrblock-rtcp-xr-video-lc-02 draft-ietf-xrblock-rtcp-xr-video-lc-03
Abstract Abstract
This document defines a new RTCP XR Report Block that allows the This document defines a new RTCP XR Report Block that allows the
reporting of loss concealment metrics for video applications of RTP. reporting of loss concealment metrics for video applications of RTP.
This XR report block completes ones defined in [RFC3611] and
[RFC7294].
Status of this Memo Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79. provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as other groups may also distribute working documents as
Internet-Drafts. Internet-Drafts.
skipping to change at page 4, line 11 skipping to change at page 4, line 11
endpoint to mitigate the impact of network impairments on QoE. For endpoint to mitigate the impact of network impairments on QoE. For
example, in an IPTV system Set Top Boxes could use this RTCP XR block example, in an IPTV system Set Top Boxes could use this RTCP XR block
to report loss and loss concealment metrics to an IPTV management to report loss and loss concealment metrics to an IPTV management
system to enable the service provider to monitor the quality of the system to enable the service provider to monitor the quality of the
IPTV service being delivered to end users. IPTV service being delivered to end users.
2 Terminology 2 Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [KEYWORDS]. document are to be interpreted as described in [RFC2119].
3 Video Loss Concealment Methods 3 Video Loss Concealment Methods
Video loss concealment mechanisms can be classified into 4 types as Video loss concealment mechanisms can be classified into 4 types as
follow: follow:
a) Frame freeze a) Frame freeze
The impaired video frame is not displayed, instead, the previously The impaired video frame is not displayed, instead, the previously
displayed frame is frozen for the duration of the loss event. displayed frame is frozen for the duration of the loss event.
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8 Acknowledgements 8 Acknowledgements
The author would like to thank Colin Perkins, Roni Even for their The author would like to thank Colin Perkins, Roni Even for their
valuable comments. valuable comments.
9 References 9 References
9.1 Normative References 9.1 Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC3550] Schulzrinne, H., Casner, S., Frederick, R., and V.
Jacobson, "RTP: A Transport Protocol for Real-Time
Applications", STD 64, RFC 3550, July 2003.
[RFC3611] Friedman, T., Ed., Caceres, R., Ed., and A. Clark, Ed.,
"RTP Control Protocol Extended Reports (RTCP XR)", RFC
3611, November 2003.
[RFC3711] Baugher, M., McGrew, D., Naslund, M., Carrara, E., and K.
Norrman, "The Secure Real-time Transport Protocol (SRTP)",
RFC 3711, March 2004.
[RFC5124] Ott, J., and E. Carrara, "Extended Secure RTP Profile for
Real-time Transport Control Protocol (RTCP)-Based Feedback
(RTP/SAVPF)", RFC 5124, February 2008.
[RFC6709] Carpenter, B., and S. Cheshire, "Design Considerations for
Protocol Extensions", RFC 6709, September 2012.
[RFC6776] Clark, A. and Q. Wu, "Measurement Identity and Information [RFC6776] Clark, A. and Q. Wu, "Measurement Identity and Information
Reporting Using a Source Description (SDES) Item and an Reporting Using a Source Description (SDES) Item and an
RTCP Extended Report (XR) Block", RFC6776, October 2012. RTCP Extended Report (XR) Block", RFC6776, October 2012.
[RFC7201] Westerlund, M. and C., Perkins, "Qptions for Securing RTP
Sessions", RFC 7201, April 2014.
[RFC7202] Perkins, C. and M., Westerlund, "Securing the RTP
Framework: Why RTP Does Not Mandate a Single Media
Security Solution", RFC 7202, April 2014.
[RFC7294] Clark, A., Zorn, G., Bi, C. and Q., Wu, "RTCP XR Report [RFC7294] Clark, A., Zorn, G., Bi, C. and Q., Wu, "RTCP XR Report
Block for Concealment Metrics Reporting on Audio Block for Concealment Metrics Reporting on Audio
Applications", April 2014. Applications", April 2014.
9.2 Informative References 9.2 Informative References
[RFC6390] Clark, A. and B. Claise, "Guidelines for Considering New [RFC6390] Clark, A. and B. Claise, "Guidelines for Considering New
Performance Metric Development", BCP 170, RFC 6390, Performance Metric Development", BCP 170, RFC 6390,
October 2011. October 2011.
[RFC6792] Wu, Q., Hunt, G., and P. Arden, "Guidelines for Use of the [RFC6792] Wu, Q., Hunt, G., and P. Arden, "Guidelines for Use of the
RTP Monitoring Framework", RFC 6792, November 2012. RTP Monitoring Framework", RFC 6792, November 2012.
[RFC7201] Westerlund, M. and C., Perkins, "Qptions for Securing RTP
Sessions", RFC 7201, April 2014.
[RFC7202] Perkins, C. and M., Westerlund, "Securing the RTP
Framework: Why RTP Does Not Mandate a Single Media
Security Solution", RFC 7202, April 2014.
Appendix A. Metrics Represented Using the Template from RFC 6390 Appendix A. Metrics Represented Using the Template from RFC 6390
a. Video Impaired Duration Metric a. Video Impaired Duration Metric
* Metric Name: Video Impaired Duration Metric * Metric Name: Video Impaired Duration Metric
* Metric Description: The total time length of video impaired by * Metric Description: The total time length of video impaired by
transmission loss before applying any loss concealment methods. transmission loss before applying any loss concealment methods.
* Method of Measurement or Calculation: The metric is based on * Method of Measurement or Calculation: The metric is based on
measurements that are typically made at the time that a video measurements that are typically made at the time that a video
frame is decoded and rendered for playout. frame is decoded and rendered for playout.
* Units of Measurement: This metric is expressed in units of RTP * Units of Measurement: This metric is expressed in units of RTP
timestamp. timestamp.
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