[4] | Mario Döller, Harald Kosch, An MPEG-7 Multimedia Data Cartridge, In SPIE Conference on Multimedia Computing and Networking 2003 (MMCN03), Santa Clara, CA, January 29-31, 2003 (Ragunathan Rajkumar, ed.), SPIE, Santa Clara, USA, pp. 240, 2003.
[bib][url] [abstract]
Abstract: Broadly used Database Management Systems (DBMS) are not able to tackle the requirements of multimedia in querying, indexing and content modeling. Therefore, extenders for multimedia data types have been proposed. These extensions, however, offer only limited semantic modeling and rely on basic index structures which do not meet the whole nature of multimedia, for instance for a Nearest-Neighbor Search. In this context, the paper presents a methodology for enhancing extensible ORDBMS for multimedia data. In particular, we introduce an MPEG-7 Multimedia Data Cartridge which includes a semantically rich metadata model for multimedia content relying on the MPEG-7 standard. Furthermore, to fulfill the needs for efficient multimedia query processing, we created in this Cartridge a new indexing and query framework for various types of retrieval operations
|
[3] | Laszlo Böszörmenyi, Hermann Hellwagner, Harald Kosch, Mulugeta Libsie, Stefan Podlipnig, Metadata Driven Adaptation in the ADMITS Project, In Signal Processing - Image Communication - Special Issue on Multimedia Adaptation, Elsevier, vol. Vol. 18, no. Issue 8, Oxford, United Kingdom, pp. 749-766, 2003.
[bib][url] [abstract]
Abstract: The ADMITS project (Adaptation in Distributed Multimedia IT Systems) is building an experimental distributed multimedia system for investigations into adaptation, which we consider is an increasingly important tool for multimedia systems. A number of possible adaptation entities (server, proxy, clients, routers) are being explored, different algorithms for media, component and application-level adaptations are being implemented and evaluated, and experimental data are being derived to gain insight into when, where and how to adapt, and how individual, distributed adaptation steps interoperate and interact with each other. In this paper the "adaptation-chain" of (MPEG-conforming) metadata based adaptation is described: from the creation stage at the server side, through its usage in the network (actually in a proxy), up to the consumption at the client. The metadata are used to steer the adaptation processes. MPEG-conformant metadata, the so-called variation descriptions, are introduced; an example of a complete MPEG-7 document describing temporal scaling of an MPEG-4 video is given. The meta-database designed to store the metadata is briefly discussed. We describe how the metadata can be extracted from MPEG-4 visual elementary streams and initial results from the temporal video scaling experiment are given. We further present how the metadata can be utilized by enhanced cache replacement algorithms in a proxy server in order to realize quality-based caching; experimental results using these algorithms are also given. Finally, an adaptive query and presentation interface to the meta-.
|
[2] | Mulugeta Libsie, Harald Kosch, Content Adaptation of Multimedia Delivery and Indexing using MPEG-7., In Proceedings of the tenth ACM international conference on Multimedia (Lawrence Rowe, Bernard Merialdo, Max Muehlhaeuser, Keith Ross, Nevenka Dimitrova, eds.), ACM, New York, USA, pp. 644-646, 2002.
[bib] [doi] [abstract]
Abstract: This work introduces a framework for adapting MPEG-4 intra- and inter-Elementary Streams and for encoding the results in an MPEG-7 stream to be used for resource adaptation on the delivery path to the user.
|
[1] | Harald Kosch, Mario Döller, Demonstration of an MPEG-7 Multimedia Data Cartridge., In Proceedings of the 10th International Conference on Multimedia, Antibes, France, Nov. to Dec. 2002. (Lawrence Rowe, Bernard Merialdo, Max Muehlhaeuser, Keith Ross, Nevenka Dimitrova, eds.), ACM Press, New York, NY, USA, pp. 85-86, 2002.
[bib] [doi] [pdf] [abstract]
Abstract: Multimedia Database Systems (MMDBMS) organize and store multimedia data for content retrieval. The relying multimedia data models represent abstractions of media objects for querying, indexing, and so on. However, most currently available implementations reval shortcomings. Either they are limited by one kind of multimedia data supported or by the capacity of their semantic modelling. Despite the upcoming MPEG-7 standard for representing low-level and high-level features of multimedia and respective annotation and use tools (see http://www.mpeg-industry.com), we are not aware of any MMDBMS product which integrates this standard for the purpose of a more meaningful indexing and querying. In this context, our paper presents a Multimedia Data Cartridge (MDC) for demonstration at ACM Multimedia 2002 that implements an object-relational data model for the core part of the MPEG-7 standard. It is an open and extensible system realized with the Oracle Data Cartridge technology. Oracle offers with that technology a mechanism for extending the capabilities of an Oracle database (e.g., type system, query processing and indexing) for the users needs. Besides the more effective modelling of multimedia content, efficient retrieval was considered. Efficient query processing is guaranteed through new database indexing mechanisms. Innately, most database systems provide only a limited number of integrated access methods such as B-trees. Available multimedia database extension packages (e.g., DataBlades of Informix) rarely handle indexing of d-dimensional data (e.g., feature vectors with d>2) or advanced similarity search functionalities (e.g., k-NN search). These circumstances limit the use of database systems in multimedia. For overcoming this drawback, we introduce an Multimedia Indexing Framework (MIF) relying on the GiST framework. Finally, in order to use the MMDBMS we provide query and presentation interfaces which automatically adapt to their usage environment.
|