Articulated Narrowcasting for Privacy and Awareness in Multimedia Conferencing Systems and Design for Implementation Within a SIP Framework Sabbir Alam Mohammad Cohen Michael Ahmed Ashir This article proposes a new focus of research for multimedia conferencing systems which allows a participant to flexibly select another participant or a group for media transmission. For example, in a traditional conference system, participants voices might by default be shared with all others, but one might want to select a subset of the conference members to send his/her media to or receive media from. We review the concept of narrowcasting, a model for limiting such information streams in a multimedia conference, and describe a design to use existing standard protocols (SIP and SDP) for controlling fine-grained narrowcasting sessions. Conferencing Device Capability Media Direction Control Narrowcasting Privacy and Awareness SDP SIP 004 periodical academic journal JVRB - Journal of Virtual Reality and Broadcasting 5(2008) 14 2009 1860-2037 urn:nbn:de:0009-6-14724 10.20385/1860-2037/5.2008.14 sabbir alam2009