A Distributed Multimedia Communication System and its Applications to E-Learning

In this paper we report on a multimedia communication system including a VCoIP (Video Conferencing over IP) software with a distributed architecture and its applications for teaching scenarios. It is a simple, ready-to-use scheme for distributed presenting, recording and streaming multimedia content. We also introduce and investigate concepts and experiments to IPv6 user and session mobility, with the special focus on real-time video group communication.Comment: Including 6 figure

Multi-Camera Crowd Monitoring: The SAFEST Approach

International audienceThis paper presents the current state of people counting approach created for the SAFEST project. A video based surveillance system for monitoring crowd behaviour is developed. The system detects dangerous situations by analysing the dynamics of the crowd density. Therefore we developed a grid-based people counting algorithm which provides density per cell for the global view on the monitored area. Since multiple cameras may observe same parts of the monitored area, the challenge is not only to count people seen by single cameras , but also to merge the views. Therefore we first detect people seen by each camera separately and then sum the results to a global representation. In order to avoid multiple counting of same objects, the output of cameras in the overlapped regions are weighted

Area & Perimeter Surveillance in SAFEST using Sensors and the Internet of Things

International audienceSAFEST is a project aiming to provide a comprehensive solution to ensure the safety and security of the general public and critical infrastructures. The approach of the project is to design a lightweight, distributed system using heterogeneous, networked sensors, able to aggregate the input of a wide variety of signals (e.g. camera, PIR, radar, magnetic, seismic, acoustic). The project aims for a proof-of-concept demonstration focusing on a concrete scenario: crowd monitoring, area and perimeter surveillance in an airport, realized with a prototype of the system, which must be deployable and foldable overnight, and leverage autoconfiguration based on wireless communications and Internet of Things. This paper reviews the progress towards reaching this goal, which is planned for 2015

Global serverless videoconferencing over IP

In recent years the capabilities of the common Internet infrastructure have increased to an extent where data intensive communication services may mature to become popular, reliable applications. Videoconferencing over IP can be seen as such a highly prominent candidate. However, heavy infrastructure and complicated call handling hinder acceptance of standard solutions.This paper presents a more lightweight framework--both communication scheme and conferencing software--to overcome these deficiencies. A simple, ready-to-use global location scheme for conference users is proposed. First practical experiences are reported

Scalable Mobile Multimedia Group Conferencing based on SIP initiated SSM

Multimedia group communication emerges to focal interest at mobile devices, enriching voice or video conferencing and complex collaborative environments. The Internet uniquely provides the bene t of scalable, dynamic group communication services, vitally aiding commonly limited mobile terminals. The traditional Internet approach of Any Source Multicast (ASM) routing, though, remains hesitant to spread beyond limited, controlled environments. It is widely believed that simpler and more selective mechanisms for group distribution in Source Speci c Multicast (SSM) will globally disseminate to many users of multicast infrastructure and services. Mobility management for the recent SSM standard is under debate SSM group session initiation up until now remains unsupported by the Session Initiation Protocol (SIP). In this paper we present straightforward extensions to SIP for negotiating SSM sessions. SIP protocol speci cations and semantic are compatibly extended without adding new SIP methods. We will introduce a multimedia communication software with distributed architecture as implementation reference. Furthermore mobility management of the underlying routing layer is discussed and evaluated on grounds of real-world Internet topologies. This ongoing work is supported by the German Bundesministeriu

Mobile Serverless Videoconferencing : Towards a Next Generation Internet Application

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