Audio/Video Transport Core Maintenance (avtcore)
------------------------------------------------

 Charter
 Last Modified: 2011-12-09

 Current Status: Active Working Group

 Chair(s):
     Roni Even  <even.roni@huawei.com>
     Magnus Westerlund  <magnus.westerlund@ericsson.com>

 Real-time Applications and Infrastructure Area Director(s):
     Gonzalo Camarillo  <gonzalo.camarillo@ericsson.com>
     Robert Sparks  <rjsparks@nostrum.com>

 Real-time Applications and Infrastructure Area Advisor:
     Robert Sparks  <rjsparks@nostrum.com>

 Secretary(ies):
     Tom Taylor  <tom.taylor.stds@gmail.com>

 Mailing Lists: 
     General Discussion:avt@ietf.org
     To Subscribe:      https://www.ietf.org/mailman/listinfo/avt
     Archive:           http://www.ietf.org/mail-archive/web/avt/index.html

Description of Working Group:

The Real-time Transport Protocol, RTP, along with its associated
profiles and payload formats provides for real-time transmission of
audio and video over unicast and multicast transports.  RTP itself has
been shepherded to Full Standard. Its associated profiles, extensions,
and payload formats are currently at various levels of standards maturity. 

The AVTCORE working group is chartered to maintain the core RTP/RTCP
specifications and the AVP, SAVP, AVPF, and SAVPF profiles. The group
will provide architectural guidance for extending the protocols and
guidelines for their proper use. While other working groups may be
chartered to work on application-specific extensions to the protocols,
extensions that are generally applicable will be developed in AVTCORE.

The AVTCORE working group will coordinate closely with the Security Area
while working on maintenance and enhancements to the SRTP Profile.

In addition to the milestones called out below, the AVTCORE working
group's initial tasks will include completing any remaining work
identified in those drafts from the AVT working group already in IESG
Evaluation, with the exception of the Rapid Acquisition of Multicast RTP
sessions, which will complete in the AVTEXT working group.

 Goals and Milestones:

   Done         Submit Guideline for Choosing RTCP CNAME as Proposed Standard 

   Done         Submit use of AES-192 and AES-256 in Secure RTP for Proposed 
                Standard 

   Done         Submit Port Mapping Between Unicast and Multicast RTP Sessions 
                for Proposed Standard 

   Feb 2011       Submit Monitoring Architecture for RTP for Informational 

   Done         Submit Guidelines for the use of Variable Bit Rate Audio with 
                Secure RTP as Informational (or possibly BCP) 

   Apr 2011       Submit in band keying mechanism for SRTP draft for Proposed 
                Standard 

   Apr 2011       Submit Explicit Congestion Notification (ECN) for RTP over UDP 
                for Proposed Standard 

   May 2011       Submit RTCP indication for retransmission suppression as 
                Proposed Standard 

   Sep 2011       Submit Encryption of Header Extensions in the Secure Real-Time 
                Transport Protocol (SRTP) for Proposed Standard 

   Dec 2011       Submit Real-Time Transport Control Protocol (RTCP) in Overlay 
                Multicast for Proposed Standard 

   Mar 2012       Submit Specification for Inter-destination Media Playout 
                Synchronization in RTP to IESG for publication as Proposed 
                Standard 


 Internet-Drafts:

Posted Revised         I-D Title   <Filename>
------ ------- --------------------------------------------
Jul 2008 Oct 2011   <draft-ietf-avt-srtp-not-mandatory-08.txt>
                Why RTP Does Not Mandate a Single Security Mechanism 

Jul 2009 Oct 2011   <draft-ietf-avt-srtp-aes-gcm-02.txt>
                AES-GCM and AES-CCM Authenticated Encryption in Secure RTP 
                (SRTP) 

Mar 2010 Oct 2011   <draft-ietf-avt-srtp-ekt-03.txt>
                Encrypted Key Transport for Secure RTP 

Jan 2011 Dec 2011   <draft-ietf-avtcore-srtp-vbr-audio-04.txt>
                Guidelines for the use of Variable Bit Rate Audio with Secure 
                RTP 

Jan 2011 Oct 2011   <draft-ietf-avtcore-ecn-for-rtp-05.txt>
                Explicit Congestion Notification (ECN) for RTP over UDP 

Feb 2011 Feb 2012   <draft-ietf-avtcore-feedback-supression-rtp-11.txt>
                RTCP Extension for Third-party Loss Report 

Apr 2011 Jan 2012   <draft-ietf-avtcore-monarch-09.txt>
                Monitoring Architectures for RTP 

Jun 2011 Oct 2011   <draft-ietf-avtcore-srtp-encrypted-header-ext-01.txt>
                Encryption of Header Extensions in the Secure Real-Time 
                Transport Protocol (SRTP) 

Jun 2011 Oct 2011   <draft-ietf-avtcore-idms-02.txt>
                RTCP for inter-destination media synchronization 

 Request For Comments:

  RFC   Stat Published     Title
------- -- ----------- ------------------------------------
RFC6263 PS   Jun 2011    Application Mechanism for Keeping Alive the NAT Mappings 
                       Associated with RTP / RTP Control Protocol (RTCP) Flows 

RFC6284 PS   Jun 2011    Port Mapping Between Unicast and Multicast RTP Sessions 

RFC6354 PS   Aug 2011    Forward-Shifted RTP Redundancy Payload Support