From: The IESG To: IETF-Announce Message-Id: Date: Wed, 28 Sep 2005 13:11:20 -0400 Cc: avt chair , avt chair , Internet Architecture Board , avt mailing list , RFC Editor Subject: [AVT] Protocol Action: 'RTP Payload Format for Extended AMR Wideband (AMR-WB+) Audio Codec' to Proposed Standard The IESG has approved the following document: - 'RTP Payload Format for Extended AMR Wideband (AMR-WB+) Audio Codec ' as a Proposed Standard This document is the product of the Audio/Video Transport Working Group. The IESG contact persons are Allison Mankin and Jon Peterson. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-avt-rtp-amrwbplus-07.txt Technical summary: This draft defines an RTP payload format for the new AMR-WB+ audio codec. The format is heavily derived from the existing RTP payload format for the AMR-WB audio codec (RFC 3267), with some simplifications and with support for the new features of the WB+ modes. The design choices are largely those that have been proven in previous payload formats. The only somewhat unusual feature is that the RTP clock rate is run at a different rate than the audio sampling rate, to allow for variable rate coding. Working group summary: There was strong consensus in the working group that this is an appropriate solution. The specification is reported as a critical dependency by 3GPP's liaison to the IETF. Protocol quality: The protocol is being widely implemented by 3GPP companies. It has been extensively reviewed by Colin Perkins and Dave Singer; Colin is the shepherd of the document for the IETF.