Audio/Video Transport Core Maintenance (avtcore) ------------------------------------------------ Charter Last Modified: 2011-01-25 Current Status: Active Working Group Chair(s): Roni Even Magnus Westerlund Real-time Applications and Infrastructure Area Director(s): Gonzalo Camarillo Robert Sparks Real-time Applications and Infrastructure Area Advisor: Robert Sparks Secretary(ies): Tom Taylor 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 Jan 2011 Submit Port Mapping Between Unicast and Multicast RTP Sessions for Proposed Standard Feb 2011 Submit Monitoring Architecture for RTP for Informational Feb 2011 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 Internet-Drafts: Posted Revised I-D Title ------ ------- -------------------------------------------- Jun 2007 Mar 2011 Application Mechanism for keeping alive the Network Address Translator (NAT) mappings associated to RTP/RTCP flows. Sep 2007 Aug 2010 Forward-shifted RTP Redundancy Payload Support Jul 2008 Jul 2010 Why RTP Does Not Mandate a Single Security Mechanism Jul 2009 Jan 2011 AES-GCM and AES-CCM Authenticated Encryption in Secure RTP (SRTP) Mar 2010 Mar 2011 Encrypted Key Transport for Secure RTP Jan 2011 Jan 2011 Guidelines for the use of Variable Bit Rate Audio with Secure RTP Jan 2011 Mar 2011 Explicit Congestion Notification (ECN) for RTP over UDP Jan 2011 Apr 2011 Port Mapping Between Unicast and Multicast RTP Sessions Feb 2011 Apr 2011 RTCP Extension for Feedback Suppression Indication Request For Comments: None to date.