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The Multimedia Data Schema (MDS) of a Distributed Multimedia System (DMS) speciies the properties of the multimedia objects (MMOs), the properties of set of objects as a whole, and the temporal relations between the objects. The Multimedia Communications Schema (MCS) of a DMS is derived from the MDS by adding communication and synchronization requirements.(More)
  • S K Chang
  • 1996
This paper introduces the active index for content-based medical image retrieval. The dynamic nature of the active index is its most important characteristic. With an active index, we can effectively and efficiently handle smart images that respond to accessing, probing and other actions. The main applications of the active index are to prefetch image and(More)
An architecture for query execution and interactive query refinement on heterogeneous data from spatially distributed sensors is proposed. The objective is to define a system in which it is always possible to add new data sources and new algorithms for data processing and user query execution. The query language that forms the basis for query formulation is(More)
Despite the simplicity of this example, it demonstrates several features of the MOODS data model. First, the semantics of the data at each stage continuously tracks the current meaning of the information that has been identified. The newly identified semantic information can then be queried and searched. The semantics at each stage also restrict the(More)
A modular design approach for a database system is presented in this paper. We require that every database file be self-descriptive and every program module be self-contained. To improve access efficiency and database security, database decomposition is also considered. Based upon this approach, IRAIN - a relational database system is designed and(More)
This paper describes the design and implementation of an architecture to support discovery, advertizing and fusion of multimedia information on the Internet. The basic tenet of the proposed architecture is a metadata abstraction, referred to as adlet. Based on this abstraction, a document dynamically builds metadata, advertises itself to other active(More)
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