RTP Payload Format for the Extended Adaptive Multi-Rate Wideband (AMR-WB+) Audio Codec
RFC 4352

Approval announcement
Draft of message to be sent after approval:

From: The IESG <iesg-secretary@ietf.org>
To: IETF-Announce <ietf-announce@ietf.org>
Cc: Internet Architecture Board <iab@iab.org>,
    RFC Editor <rfc-editor@rfc-editor.org>, 
    avt mailing list <avt@ietf.org>, 
    avt chair <avt-chairs@tools.ietf.org>
Subject: 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 '
   <draft-ietf-avt-rtp-amrwbplus-08.txt> 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-08.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.