The IESG has approved the following document: - 'RTCP XR Report Block for Concealment metrics Reporting on Audio Applications' (draft-ietf-xrblock-rtcp-xr-loss-conceal-12.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 Alissa Cooper and Richard Barnes. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-xrblock-rtcp-xr-loss-conceal/ Technical Summary This draft defines two new block types to augment those defined in [RFC3611] for use in a range of RTP applications. The new block types supports the reporting of concealment metrics for audio applications of RTP. Working Group Summary There were several points of debate within the working group; however, none were particularly rough and authors and commentators came up with the text that resolves any issues thus consensus was achieved in all cases. Document Quality This document has been reviewed by numerous people within XRBLOCK through two rounds of WGLCs and in AVT WG where the draft previously belonged. The document resolved any outstanding issues. The document has been reviewed by SDP directorate post WGLC for SDP extensions defined, any issues raised were resolved. The document has been reviewed by PM-DIR and the OPS directorate as well. Personnel Shida Schubert is the Document Shepherd. Alissa Cooper is the Responsible Area Director.