Advances in Multimedia Modeling

This talk covers perspectives on adaptive video streaming and how such techniques are essential for systems with heterogeneous devices. Adaptation is possible using flexible video coding techniques, such as the H.264 Scalable VIdeo Coding (SVC). In this context, it is important to consider various aspects of the video coding system (interdependencies, quality layers, QoE, etc) as well of the delivery architectures (client server, P2P, connectivity, etc). The first part relates to quality adaptation algorithms that match the video quality with available local and system resources without any a-priori knowledge about those resources. Subsequently in the second part, mechanisms that use Quality of Experience (QoE) metrics to enhance its performance for the users will be shown. The decision of which SVC quality to choose is usually driven by QoS metrics, such as throughput. Instead, it will be presented how objective QoE of the different SVC qualities can be used in the decision process. The talk concludes by presenting the major further research activities in this research area.