(Meta)datastandaarden voor digitale archieven

In het derde werkpakket van het project BOM-Vl (Bewaring en Ontsluiting van Multimediale data in Vlaanderen, 2008-2009) staat de technische problematiek van langetermijnbewaring van digitaal erfgoed centraal. Het OAIS-model, een ISO-standaard sinds 2002, geldt hierbij als conceptueel referentiemodel dat richtlijnen biedt bij de opzet van een digitaal archief. Aan de hand hiervan werd in een eerste deliverable aangegeven met welke representatiewijzen van de data en soorten metadata men rekening dient te houden om de preservering van digitaal materiaal te garanderen en hoe men mogelijk dataverlies kan tegengaan door grondige technische overwegingen. In een uitvoerig overzicht, een state-of-the-art, komen de gangbare opslagformaten met betrekking tot verschillend audiovisueel materiaal aan bod. Vervolgens worden ook de meest courante standaarden in het bibliotheekwezen, de omroepsector, de culturele sector en de erfgoedsector besproken, in het bijzonder metadatastandaarden (descriptieve, technische, administratieve), thesauri of ontologieën en containerformaten. Ten slotte worden twee representatieve praktijkvoorbeelden toegelicht, namelijk de ontwikkeling van het e-Depot in de Koninklijke Bibliotheek van Nederland en de opzet van een Europese meertalige zoekmachine voor cultureel erfgoedonderzoek. Dit boek is de neerslag van deze deliverable en is bedoeld als referentiewer

Description-driven Adaptation of Media Resources

The current multimedia landscape is characterized by a significant diversity in terms of available media formats, network technologies, and device properties. This heterogeneity has resulted in a number of new challenges, such as providing universal access to multimedia content. A solution for this diversity is the use of scalable bit streams, as well as the deployment of a complementary system that is capable of adapting scalable bit streams to the constraints imposed by a particular usage environment (e.g., the limited screen resolution of a mobile device). This dissertation investigates the use of an XML-driven (Extensible Markup Language) framework for the format-independent adaptation of scalable bit streams. Using this approach, the structure of a bit stream is first translated into an XML description. In a next step, the resulting XML description is transformed to reflect a desired adaptation of the bit stream. Finally, the transformed XML description is used to create an adapted bit stream that is suited for playback in the targeted usage environment. The main contribution of this dissertation is BFlavor, a new tool for exposing the syntax of binary media resources as an XML description. Its development was inspired by two other technologies, i.e. MPEG-21 BSDL (Bitstream Syntax Description Language) and XFlavor (Formal Language for Audio-Visual Object Representation, extended with XML features). Although created from a different point of view, both languages offer solutions for translating the syntax of a media resource into an XML representation for further processing. BFlavor (BSDL+XFlavor) harmonizes the two technologies by combining their strengths and eliminating their weaknesses. The expressive power and performance of a BFlavor-based content adaptation chain, compared to tool chains entirely based on either BSDL or XFlavor, were investigated by several experiments. One series of experiments targeted the exploitation of multi-layered temporal scalability in H.264/AVC, paying particular attention to the use of sub-sequences and hierarchical coding patterns, as well as to the use of metadata messages to communicate the bit stream structure to the adaptation logic. BFlavor was the only tool to offer an elegant and practical solution for XML-driven adaptation of H.264/AVC bit streams in the temporal domain

Rescuing the legacy project: a case study in digital preservation and technical obsolescence

The ability to maintain continuous access to digital documents and artifacts is one of the most significant problems facing the archival, manuscript repository, and record management communities in the twenty-first century. This problem with access is particularly troublesome in the case of complex digital installments, which resist simple migration and emulation strategies. The Legacy Project, which was produced by the William Breman Jewish Heritage Museum in Atlanta, was created in the early 2000s as a means of telling the stories of Holocaust survivors who settled in metropolitan Atlanta. Legacy was an interactive multimedia kiosk that enabled museum visitors to read accounts, watch digital video, and examine photographs about these survivors. However, several years after Legacy was completed, it became inoperable, due to technological obsolescence. By using Legacy as a case study, I examine how institutions can preserve access to complex digital artifacts and how they can rescue digital information that is in danger of being lost.M.S.Committee Chair: Knoespel, Kenneth; Committee Member: Burnett, Rebecca; Committee Member: Fox Harrell; Committee Member: TyAnna Herringto

Políticas de Digital.CSIC

Fecha de actualización: 09-10-2015Este documento divulga las líneas de acción de Digital.CSIC en materia de contenidos y colecciones, servicios, reutilización de metadatos y datos, depósitos, edición y eliminación de registros, estadísticas, preservación y formatos, y privacidad. Las políticas ayudarán a nuestros usuarios a conocer mejor el repositorio y van en línea con buenas prácticas promovidas a nivel internacional. En octubre de 2013 se añadió una nueva política relativa a las buenas prácticas y directrices para datos de investigación en Digital.CSICContiene: 1. Política de contenidos y colecciones.-- 2. Buenas prácticas y directrices para datos de investigación en Digital.CSIC.-- 3. Política de servicios.-- 4. Política de metadatos.-- 5. Política de datos.-- 6. Política de depósitos.-- 7. Política de edición, retención, sustitución y eliminación de registros.-- 8. Política de estadísticas.-- 9. Política de preservación digital.-- 10. Política de soporte de formatos.-- 11. Política de privacidadPeer reviewe

Detection and representation of moving objects for video surveillance

In this dissertation two new approaches have been introduced for the automatic detection of moving objects (such as people and vehicles) in video surveillance sequences. The first technique analyses the original video and exploits spatial and temporal information to find those pixels in the images that correspond to moving objects. The second technique analyses video sequences that have been encoded according to a recent video coding standard (H.264/AVC). As such, only the compressed features are analyzed to find moving objects. The latter technique results in a very fast and accurate detection (up to 20 times faster than the related work). Lastly, we investigated how different XML-based metadata standards can be used to represent information about these moving objects. We proposed the usage of Semantic Web Technologies to combine information described according to different metadata standards