The IESG has approved the following document: - 'RTCP XR Report Block for Loss Concealment Metrics Reporting on Video Applications' (draft-ietf-xrblock-rtcp-xr-video-lc-06.txt) as Proposed Standard This document is the product of the Metric Blocks for use with RTCP's Extended Report Framework Working Group. The IESG contact persons are Alexey Melnikov, Ben Campbell and Alissa Cooper. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-xrblock-rtcp-xr-video-lc/ Technical Summary Multimedia applications often suffer from packet losses in IP networks. In order to get a reasonable degree of quality in case of packet losses, 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 application QoE. 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 may also not be fully aware of the specific loss concealment methods being dynamically applied by the video endpoint. Evaluating error concealment is important in the circumstance in estimating the subjective impact of impairments. This draft defines one new video loss concealment block type to augment those defined in [RFC3611] and [RFC7294] for use in a range of RTP video applications. The metrics defined in this draft belong to the class of transport-related terminal metrics defined in [RFC6792]. Working Group Summary The XRBLOCK WG has a small but dedicated number of contributors. The I-D was attentively reviewed and improved by comments provided by contributors. There is strong consensus to advance the document to the IESG Document Quality Representatives from a couple of vendors reported on plans to implement. The document was reviewed by the SDP and PMOL directorates, and comments made by these were addressed and changes incorporated. Personnel Dan Romascanu is the Shepherd, Alissa Cooper is the Responsible AD.
