Last N: relevance-based selectivity for forwarding video in multimedia conferences

Multiparty conferencing has traditionally been a relatively expensive application that was only used in enterprise scenarios. Recently, however, the landscape has started to shift in ways that could change this. Ever-increasing bandwidth and processing capabilities make it possible for mobile endpoints and laptop computers to easily handle multiple incoming media streams (both audio and video). The development of Web Real-Time Communications (WebRTC) has also significantly simplified the development of video conferencing applications and made them mainstream. Both of these changes provide a way of replacing expensive video mixers (that produce composited videos) with light-weight video routers (that selectively forward streams). In this paper, we describe a Multipoint Control Unit (MCU) that identifies and selects the last N dominant speakers and forwards their streams to all the conference participants. We evaluate the performance of this Selective Forwarding Unit (SFU) against a ...

• Type: Journal
• Year: 2015
• Where: NOSSDAV
• Authors: Boris Grozev, Lyubomir Marinov, Varun Singh, Emil Ivov
• Keywords: Computer Networks, NOSSDAV 2015