A multimedia database is a controlled collection of multimedia data items such as text, images, graphic objects, video and audio. A multimedia database management system (DBMS) provides support for the creation, storage, access, querying and control of a multimedia database. Motivation: the study of multimedia databases is influenced by various applications and their exponential expantion in the real life. Concepts: What is Multimedia. Multimedia Database. Architecture. ▫ Multimedia Architecture Requirements. ▫ ACID test. ▫ Multimedia Server Requirements. ▫ Distributed Multimedia System.
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Distributed Multimedia Database involves network technology, distributed Utopia or M-Utopia, distributed multimedia database systems allow the required. organization. 2. MM database system architecture. 3. MM system service model. 5. Multimedia application. 4. Multimedia Data Storage. why does it seem as if the multimedia hype at database conferences (that started a a business model for commercial applications of multimedia database.
Google Scholar. Thesis, George Mason Univ.
Gong, H. Zhang, H. Chuan and M. Gupta, T. Weymouth and R. Marcus and V.
The virtual museum: Interactive 3D navigation of a multimedia database
Niblack, et. Silberschatz, M. Stonebraker and J. Achievements and Opportunities , Comm. CrossRef Google Scholar.
Sacca , pps 3— Falls Church USA. Personalised recommendations. Cite chapter How to cite? ENW EndNote. There are a lot of database management systems that provide support for multimedia data storage, management and access. Some database management systems provide data types appropriate for multimedia objects. Because of multimedia data features, the capabilities available in database management systems for manipulating the stored objects are limited. The query process is a time-consuming one in multimedia databases because multimedia databases are very large databases.
Media data are not handled as an indexed structure so that it is not possible to access parts of media data. It is possible to use the attributes of the entire media, but in some applications this is not enough.
Concerning multimedia data retrieval there are two main approaches: The retrieval process returns the multimedia data searched according to the alphanumeric characteristics. These techniques are based on the common index structures. For the temporal data as audio and video are used the intervals trees adapted to media types as frame segmentation tree.
The second is to retrieve multimedia data based on their contents. This technique involves analyzing the content of a multimedia data based on a pattern and then obtaining the data that are the most appropriate comparing with the pattern used. This retrieval process can be specialized on particular multimedia elements that are stored in a database. To detect a person based on his face we have to extract and analyze many features as: A multimedia database system has to be able to search multimedia data using various criteria that can be applied independent of the multimedia elements types stored in tables.
InterMedia system uses a content-based system that processes the image content and generates an abstraction of the image for visual attributes.
The queries use these image abstractions and not the image itself. The criteria used by interMedia system are: The positions of the visual attributes inside the image are represented using coordinates.
The coordinates cannot be used independent by the visual attributes and only with one of them. The array of characteristics stored in the database is named signature. The signature is extracted by image segmentation based on colour areas that form the image.
Each region has associated information about colour, texture and shape. The attribute colour stores information about colour distribution in the whole image. The attribute texture represents the image patterns like granularity and smoothness.
The shapes are determinate based on segmentation techniques.
Multimedia Database Retrieval
Location represents the position of colour, texture and contour components. In the search process, each visual attribute get a weight, based on its importance, between zero - insignificant attribute - and one — extremely important attribute.
The difference between two images is calculated as the weight sum of score for each attribute with attribute importance. The score of a image can have values between zero — it is no difference between the images and — the maximum difference.
The procedure scans the database, calculates the score and after that, it is necessary to compute the minimum score that gives the appropriate image.
Multimedia Database Management Systems
While multimedia databases would increase the flexibility, access and reuse of the media, other challenges arise. Multimedia databases are complex technologies requiring more specialized skills beyond simply building and deploying multimedia.
Content based retrieval of multimedia data is a very useful component for a multimedia database management system.
These techniques are difficult to implement and for this reason the multimedia database management systems component lead to relatively satisfied results. References  Ditsa, G. Related Papers. Modeling and retrieving images by content. By Vijayaraghavan Gonuguntla.
Towards Multimedia Digital Libraries. By Ulrich Schiel.
Object-based multimedia content description schemes and applications for MPEG7. By Seungyup Paek.Gong, H. A multimedia database is a database that include one or more primary media file types such as. Invariant pattern recognition: A review. FastMap: A fast algorithm for indexing, data-mining and visualization of traditional and multimedia datasets.
Period histogram and product spectrum: New methods for fundamental-frequency measurement. Kashyap, and A.
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