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Today most commercial database management software is extended to store and manage multimedia objects beside standard alphanumeric data. In this paper we study how such universal database systems can be used for implementing an adaptive multimedia digital library. We present a framework for efficient and flexible delivery of multimedia content based on the idea that multimedia objects are often stored redundantly to support broadest system access for diverse clients from heterogenous environments. There is a large number of alternatives for universal database systems to store and deliver multimedia data, since storage formats are not independent from each other but heavily interrelated by conversion tools. Partitioning the data formats into those that are physically stored in the database and those that are converted into a delivery format on-demand poses a nontrivial optimization problem. The framework presented here tackles this problem and has been implemented and evaluated with the commercial database management system DB2 Universal Database from IBM. Beside the core implementation, a graphical database administration tool has been developed to leverage the automated or semi-automated application of the optimization framework. First experiments with the implemented tools have proved substantial savings in the total costs.
The interdisciplinary HERON project investigates the impact of multimedia applications from the humanities, in particular heraldry, on future database technology. We present first evaluation results of querying image databases by visual content. Also the requirements of a digital workbench for art historians are described. Here we present an approach how to tackle the complex problem of exchanging multimedia documents over the internet.
The combination of digital libraries and applications from humanities is an important emerging field that still faces great challenges. In this paper we investigate the science of numismatics and analyse how to digitize current manual practice for the classification of ancient coins from the 4th century A.C. Our contributions are twofold. From the application's point of view we develop an improved classification algorithm with special emphasis on incompletely preserved coins. We present a new approach, called COINCLASS, to indexing (partial) image contents. Secondly, we show how to make maximum use of modern database technology by developing an extensible ODMG-compliant schema. In particular we point out the advantages gained by writting declarative set-oriented OQL queries. In essence our studies support the claim that current object-oriented database technology can cope with many complex applications from humanities.
In this paper we present a framework for the progressive delivery of Web documents in mobile Internet services. Progressive delivery enables users to get fast access to the most relevant parts of a document. Given the reduced bandwidth and the high costs of mobile communication the idea of progressive delivery offers a promising improvement especially for mobile e-services. The central part of the delivery consists of innovative concepts for content selection to determine the most relevant document parts for successive delivery maintaining the documents' readability. To make this selection as flexible and effective as possible we consider the user's notion of relevance together with semantic author annotations and structural document characteristics. Using XML technology documents are automatically adapted to fit both personal user profiles and device constraints. A prototypical mobile news service exemplifies our approach to content selection, but our framework promises to be applicable to a broad range of future Internet services.
Pervasive Internet services today promise to provide users with a quick and convenient access to a variety of commercial applications. However, due to unsuitable architectures and poor performance user acceptance is still low. To be a major success mobile services have to provide device-adapted content and advanced value-added Web services. Innovative enabling technologies like XML and wireless communication may for the first time provide a facility to interact with online applications anytime anywhere. We present a prototype implementing an efficient multimedia middleware approach towards ubiquitous value-added services using an auction house as a sample application. Advanced multi-feature retrieval technologies are combined with enhanced content delivery to show the impact of modern enterprise information systems on today’s e-commerce applications.
Das interdisziplinäre HERON-Projekt untersucht die Auswirkungen multimedialer Datenbanktechnologie auf weite Anwendungsbereiche in den Geisteswissenschaften am Beispiel der Heraldik. Besonderer Wert wird dabei sowohl auf fachspezifische Erschließung und intuitive Zugänge zu Bildmaterialien durch den Einsatz einer inhaltsbasierten Suche, als auch effiziente Internetanbindung gelegt. Während für die Erschließung des Bildmaterials effektive Segmentierungsalgorithmen zur Vorbearbeitung entwickelt wurden, werden die fachspezifische Anwendung bildinhaltlicher Merkmale, sowie die Architektur des prototypischen HERON-Recherchesystems präsentiert und offene Probleme für den praktischen Einsatz angesprochen.
Efficient multimedia database and middleware systems are crucial for a large variety of multimedia applications like Web portals and digital libraries. Hence, the further improvement of these base technologies is a major topic in database research. Multimedia content differs essentially from numeric and character data used in conventional systems and requires new strategies in data storage, administration and retrieval. Apart from basic data management the delivery of multimedia content is of essential importance: today value-added Internet applications like portal services, multimedia libraries or e-shops already have to provide a flexible delivery of multimedia data and complex digital content to support different kinds of Internet users and different types of WWW browsers. With the rollout of UMTS telephony and the potential convergence of Internet technology and mobile communication the existing high demand for the personalization of e-services might even increase. The current trend towards a "Mobile Internet" points to a wide acceptance of flexible, adaptable and personalizable multimedia applications in public and private life within the near future. Possible applications include the personalized multimedia access to news services and city guides - e.g. in chorus with GPS positioning, route guidance and telematics services - as well as mobile messaging using images and video.
In this thesis a new concept called Multimedia Delivery is developed and evaluated supporting the flexible and efficient personalization of multimedia content. Multimedia Delivery is to strengthen the infrastructure of future Internet applications and to facilitate the implementation of e-services for different kinds of users and different types of mobile devices. The building blocks of Multimedia Delivery include the efficient and cost-optimized synthesis of multimedia objects, the format-based optimization of multimedia database servers as well as the progressive and personalized delivery of complex multimedia documents.
