The focus of the book is on the integration of contributions from end-systems, which include content-aware classification, rate adaptation, forward error correction (FEC), unequal error protection (UEP), etc. and contributions from DiffServ networks to enhance the QoS performance of multimedia delivery. This book provides an overview of QoS provision methods. It presents recent results on DiffServ main functional components such as traffic conditioning, Queue management, and scheduling. The approach take in this book considers both applications and QoS networks. To be more specific, it performs optimal QoS mapping between prioritized traffic source categories and DiffServ network levels.