The main projects of Multimedia Systems group are:
Live video streaming over Internet has attracted much attention nowadays and many mechanisms have been introduced to tackle challenges behind this applications. Recently streaming over peer to peer overlay networks is proposed as an scheme to build scalable video stream applications. This group in DML is aiming to inspect this field using peer to peer approaches. DML’s peer to peer streaming group main goal is to study peer to peer overlay networks and their potentials for streaming applications. The aim is to expand peer to peer overlay structures and mechanisms formerly design for file sharing application toward more complex application of video sharing especially online video streaming. The Goals of this project are: design of peer to peer topology control mechanism tailored for video streaming and building a video content aware scheduler.
Wireless Sensor Networks (WSN) have recently been the focus of a significant amount of attention and effort of the research community. The main motivation has been to address the challenges posed by the WSN paradigm, i.e., limited node power, processing, and communication capabilities, dense network deployment, multi-hop communications, and heterogeneous application-specific requirements. The vast majority of these studies applies to conventional WSN applications which need reliable and efficient communication of scalar event features and sensor data such as temperature, pressure, humidity. With the availability of low-cost small-scale imaging sensors, CMOS cameras, microphones, which may ubiquitously capture multimedia content from the field, Wireless Multimedia Sensor Networks (WMSN) have been proposed and drawn the immediate attention of the research community. WMSN applications, e.g., multimedia surveillance networks, target tracking, environmental monitoring, and traffic management systems, require effective harvesting and communication of event features in the form of multimedia such as audio, image, and video. To this end, additional challenges for energy-efficient multimedia processing and communication in WMSN, i.e., heterogeneous multimedia reliability definitions, tight QoS expectations, and high bandwidth demands, must be addressed as well. We are building a WMSN Lab to experiment with multimedia applications in sensor architectures. Frame manipulation is required to minimize the amount of data to be sent. We are also defining and evaluating network protocols for WMSN taking into account traffic characteristics and error control mechanisms.