PrefaceSuccessfully deploying multimedia services and applications in mobile environments requires adopting an interdisciplinary approach where multimedia, networking and physical layer issues are addressed jointly. Content features analysis and coding, media access control, multimedia flow and error control, cross-layer optimization as well as mobility management and security protocols are research challenges that need to be carefully examined when designing new architectures. We also need to put a great effort in designing applications that take into account the way the user perceives the overall quality of the provided service.Within this scope, MobiMedia intends to provide a unique international forum for researchers from industry and academia, working on multimedia coding, mobile communications and networking fields, to study new technologies, applications and standards.In this MobiMedia edition, particular emphasis was put on the issue of quality of experience (QoE) in pervasive media networks and applications. Indeed, the quality of the user experience, the perceived simplicity of accessing and interacting with systems and services, and the effective and acceptable hiding of the complexity of underlying technologies are certainly determining factors for success or failure of the multimedia services, as well as graceful degradation. With this intent, the conference featured a special session on QoE as well as a panel for discussing the importance of this subject for different types of multimedia applications, related standards and issues in management. Other than a session on QoE, the conference included sessions on dynamic-spectrum-access wireless networks in the TV white spaces, media streaming, mobile visual search, image processing and transmission, multimedia in human-machine interaction, and mobile applications. This book presents a selection of the revised papers.