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In recent years, the amount of Internet accessible digital audiovisual media files has vastly increased. Therefore the need to describe the media (by way of metadata) has also increased significantly. MPEG-7 (finalized in 2001) provides a comprehensive and rich metadata standard for the description of multimedia content. Unfortunately, a standardized query(More)
We describe a systematic methodology for extending the audiovisual content description standards (MPEG-7 and TV-Anytime) with domain-specific knowledge descriptions expressed in OWL. The domain-specific descriptions of the audiovisual content metadata are completely transparent to applications and tools that use MPEG-7 and TV-Anytime, allowing them to use(More)
The domination of XML in the Internet for data exchange has led to the development of standards with XML Schema syntax for several application domains. Advanced semantic support, provided by domain ontologies and semantic Web tools like logic-based reasoners, is still very useful for many applications. In order to provide it, interoperability between XML(More)
We present in this paper the MPEG-7 Query Language (MP7QL), a powerful query language that we have developed for querying MPEG-7 descriptions, as well as its compatible Filtering and Search Preferences (FASP) model. The MP7QL has the MPEG-7 as data model and allows for querying every aspect of an MPEG-7 multimedia content description. It allows the users to(More)
Domain ontologies are very useful for indexing, query specification, retrieval and filtering, user interfaces, even information extraction from audiovisual material. The dominant emerging language standard for the description of domain ontologies is OWL. We describe here a methodology and software that we have developed for the interoperability of OWL with(More)
In this paper, we describe a framework that we have developed for the support of ontology-based semantic indexing and retrieval of audiovisual content following the MPEG-7 and TV-Anytime standard specifications for metadata descriptions. Our work aims to provide a methodology to enhance the retrieval effectiveness of audiovisual content, while maintaining(More)
In this paper, we focus on interoperable semantic multimedia services that are offered in open environments such as the Internet. The use of well-accepted standards is of paramount importance for interoperability support in open environments. In addition, the semantic description of multimedia content utilizing domain ontologies is very useful for indexing,(More)
In this paper, we describe a framework for the management of semantic metadata that describe audiovisual content. The main objectives of this work are to provide a framework allowing enhanced retrieval performance and better user interfaces for audiovisual data, based on extensions of the well accepted international standards for the digital media, digital(More)
1 Semantic interoperability is usually provided in open environments through standards and domain on-tologies. The dominant standards for multimedia content and service descriptions are MPEG-7 and MPEG-21. The MPEG-7 Semantic DS has powerful semantic description capabilities and supports using semantic entities specified in domain ontologies in multimedia(More)
SPARQL is today the standard access language for Semantic Web data. In the recent years XML databases have also acquired industrial importance due to the widespread applicability of XML in the Web. In this paper we present a framework that bridges the heterogeneity gap and creates an interop-erable environment where SPARQL queries are used to access XML(More)