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Accessing private and public multimedia content over the web with mobile terminals can be cumbersome. To approach this problem, we introduce an ecosystem where the content is accessed with clients that are constructed as mashups. Mashups are web applications that combine already existing data into an integrated experience. In addition to traditional mashup elements such as text and images, also other types of multimedia artifacts -- sound, video and even small programs -- can be used as content in mashups. However, currently available methods implementing mashups do not allow effortless access to personal data across domains or provide means to ensure that the user experience is coherent. This paper describes our mobile mashup architecture aimed to solve these problems and work as a ubiquitous platform for mobile multimedia mashups. The architecture enables a mashup ecosystem where different content providers and client developers can contribute. As a practical implementation, we present a video mashup client developed for Android. In addition, we discuss the lessons learned during the research.

Mashups that combine already existing data into an integrated experience are becoming increasingly popular. So far most mashups have been built around maps and images. However, as the web is growing increasingly ubiquitous media, also multimedia content - sound, video and even small programs - is becoming a candidate for mashup creation, with potentially superior user experience. Currently available methods to implement mashups do not allow effortless access to personal data across domains or provide means to ensure that the user experience is coherent. This paper describes our mobile mashup ecosystem aimed to solve these problems and work as a ubiquitous platform for mobile multimedia mashups. Furthermore, we provide a brief literature review about existing mashup frameworks and end-user programming. In addition, to constitute a basis for future work, we discuss about challenges expected to emerge when the ecosystem is implemented.

DVB-H (digital video broadcasting for handheld) is one of the key technologies that enables new services, such as mobile phone TV, to be used in handhelds. DVB-H enhances mobile features found in the DVB-T standard, enabling new techniques, e.g., loss-free handover. For services such as mobile TV, loss-free handovers must be supported. Different positioning technologies, such as GPS, also play an important role in enhancing today's mobile technologies. The paper proposes a new feature for DVB-H, a new method for signalling cell coverage area, thus improving performance for loss-free handovers. The proposed method is targeted at DVB-H handhelds that have GPS receivers. The benefits of the proposed method for handover and power consumption are evaluated. In addition, its effect on the consumption of bandwidth and receiver memory is estimated.