Stephan Repp

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In this indexing, both segmentation and annotations are done manually. Description Logics(DL) are used to formalize the semantic annotations in manual indexing. DL allows the knowledge of an application domain to be represented in a structured way. In DL conceptual knowledge of an application is represented in terms of concepts(Set of individuals) and(More)
In this paper, we present a general architecture and a new retrieval method for an educational system that is based on a knowledge base of existing recorded lectures. The extraction of metadata from the multimedia resources is one of the main parts of this paper. The recorded lectures are transcripted by an out-of-the-box speech recognition software. The(More)
An der Berufsbildenden Schule für Gewerbe und Technik in Trier werden Anwendungsentwickler an konkreten Projekten ausgebildet. In einer Lernortkooperation werden reale Aufgabenstellungen, die bei einem Softwareentwicklungsunternehmen anfallen, genutzt, um die Themen objektorientierte Programmierung und Design zu erarbeiten, zu reflektieren und zu vertiefen.(More)
This paper describes our <i>e-librarian service</i> that understands students' complete questions in natural language and retrieves very few but pertinent <i>learning objects</i>, i.e., short multimedia documents. The system is based on three key components: the formal representation of a domain ontology, a mechanism to automatically identify learning(More)
Searching multimedia data in particular audiovisual data is still a challenging task to fulfill. The number of digital video recordings has increased dramatically as recording technology has become more affordable and network infrastructure has become easy enough to provide download and streaming solutions. But, the accessibility and traceability of its(More)
The number of digital video recordings has increased dramatically. The idea of recording lectures, speeches, and other academic events is not new. But, the accessibility and traceability of its content for further use is rather limited. Searching multimedia data, in particular audiovisual data, is still a challenging task to overcome. We describe and(More)
The number of digital lecture video recordings has increased dramatically since recording technology became easier to use. The accessibility and ability to search within this large archive are limited and difficult. Manual annotation is time-consuming and therefore useless. A promising approach is based on using the audio layer of a lecture recording to(More)
Die Anzahl der aufgezeichneten digitalen Vorlesungen nimmt rapide zu. Immer mehr Hochschuleinrichtungen nutzen die Möglichkeit, ihre Vorlesungen als Videos aufzuzeichnen, in multimedialen Datenbanken abzulegen und für den Zugriff über das Internet bereitzustellen. Bislang ist die detaillierte Suche in diesen Multimedia Daten jedoch nur begrenzt möglich. Der(More)