CURRENT_MEETING_REPORT_ Reported by Russ Hobby/UC Davis Minutes of the Teleconferencing BOF (TELECONF) There has been considerable discussion about using the Internet in support of remote conferencing. Ideas range from using the network to provide a shared workspace, such as common document viewing and editing, to full motion video conferencing. The BOF in Santa Fe was intended to bring together people that are doing current research in the area and to see if a common direction can be found. Several researchers presented their work. Steve Casner/ISI presented an overview of Multimedia Conferencing including work that has been done on the Terrestrial Wideband Network and DARTnet. Paul Milazzo/BBN talked about their efforts with workstation based video windows. Hans Eriksson/SICS told the group about their efforts with the MultiG - research programme which is working toward a Collaborative Desktop and Telepresence. Sze-Ying Wuu/Bellcore explained the workings of their Touring Machine, as system for the management of mixed multimedia. Yee- Hsiang Chang/MCNC told the group about their project to use packet video for use on the Concert network. Peter Kiestein/UCL provided information on the meeting on International Multimedia Conferencing held at ISI on 13 November, 1991. After the presentations there was discussion about the various parts of Multimedia Conferencing and how the job of creating a working system may be broken into manageable tasks. It was suggested that there are four areas of work: 1. Shared Workspace. This includes things like shared whiteboards, editors and generalized windows for viewing other applications. 2. Conference Management. This concerns conference setup, connection management and coordination for the various parts of the overall conference. 3. Transport Formats. This will define the formats of media (i.e. video, audio, image) and how they are to be transported over the network. 4. Data Delivery. This area needs to address the service guarantees needed by real-time data and to provide reliable multicast capabilities. A new Working Group, chaired by Steve Casner, was create to coordinate work being done on the transport formats of video and audio over UDP. It was recognized that UDP does not provide the necessary service guarantees for real-time data. However, it was viewed that useful work 1 could be done over UDP on lightly loaded networks until a better means of data delivery is made available. It was felt by the group that the IETF should continue work in these areas and should be coordinated with other standards groups. Attendees Harald Alvestrand herald.alvestrand@delab.sintef.no James Beers beers@nr-tech.cit.cornell.edu David Borman dab@cray.com Robert Braden braden@isi.edu Scott Brim swb@nr-tech.cit.cornell.edu Stephen Casner casner@isi.edu Yee-Hsiang Chang yhc@concert.net Richard Cogger rhx@cornellc.cit.cornell.edu Steve Deering deering@xerox.com Barbara Denny denny@sri.com Peter DiCamillo cmsmaint@brownvm.brown.edu Hans Eriksson hans@sics.se Farrell Gerbode farrell@rice.edu Ittai Hershman ittai@nis.ans.net Russ Hobby rdhobby@ucdavis.edu Peter Kirstein kirstein@cs.ucl.ac.uk Cheryl Krupczak cheryl@cc.gatech.edu Ruth Lang rlang@nisc.sri.com Eliot Lear lear@sgi.com Brian Lloyd brian@ray.lloyd.com E. Paul Love loveep@sdsc.edu Paul Milazzo milazzo@bbn.com Greg Minshall minshall@wc.novell.com David O'Leary oleary@sura.net Ari Ollikainen ari@es.net Joe Ragland jrr@concert.net Daisy Shen daisy@watson.ibm.com Claudio Topolcic topolcic@nri.reston.va.us Kannan Varadhan kannan@oar.net Andrew Veitch aveitch@bbn.com Sze-Ying Wuu syww@thumper.bellcore.com 2