Lu G. Multimedia Database Management Systems

Lu G. Multimedia Database Management Systems
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  • добавлен 29.10.2011
Издательство Artech House, 1999, -496 pp.

A few years ago, the main focus in multimedia research and development was on multimedia communications and multimedia authoring and presentation. Since more and more digital multimedia data in the forms of image, video, and audio are being captured and stored, the focus has shifted in last few years to efficient and effective storage and retrieval of multimedia information. A similar situation happened about thirty years ago when more and more alphanumeric data were stored in computer-readable form. This led to the development of database management systems (DBMSs), which are now one of the most popular computer applications and are used in almost every organization. Due to the differences between the characteristics and requirements of alphanumeric data and multimedia data, a traditional DBMS is not capable of effectively handling multimedia data. Thus new multimedia indexing and retrieval techniques are required.
This book provides comprehensive coverage on issues and current technologies in multimedia database management. It starts with a discussion on the main characteristics and requirements of multimedia data. It then describes general design issues of multimedia database management systems to meet these characteristics and requirements. We discuss techniques for the indexing and retrieval of text documents, audio, images, and video. The commonality among these techniques is that they all try to extract main features from raw media data, and then try to retrieve items relevant to the user's query based on the similarity or the distance between the extracted feature vectors of the stored items and the query. As multiple media types usually appear together in multimedia objects or documents and different techniques capture different features or contents of them, we discuss how to integrate various indexing and retrieval techniques for effective retrieval of multimedia documents. Since the features extracted from raw media data are usually represented by multidimensional vectors, it would be very time-consuming to calculate the similarity between the query feature vector and the feature vector of each of the stored items. We discuss various techniques and data structures so that the search and retrieval can be carried out efficiently.
Multimedia databases are usually accessed remotely oyer a network. Multimedia objects identified as relevant to the query must be retrieved from the server and transmitted to the client for presentation. A set of requirements involving factors including delay and delay jitter, called quality of service, must be met to achieve multimedia presentation in a smooth and timely fashion. We describe computer architecture, multimedia storage, operating system, and networking support to meet these requirements.
In traditional DBMSs, the main performance concern is efficiency (how long it takes to answer a query). In multimedia database management systems (MMDBMSs), efficiency is important too. In addition, retrieval effectiveness (ability to retrieve relevant items and ability to reject irrelevant items) becomes important. This is because MMDBMSs retrieve items based on similarity measured using a similarity metric instead of exact match. Since it is difficult to extract all features of multimedia items and design a similarity metric that exactly conforms to human judgment, it is likely that some items determined as relevant by the system are actually judged irrelevant by the user and some relevant items are not retrieved. Thus we also discuss performance measurement issues in MMDBMSs. Finally, we briefly describe current products, application development, and other issues such as security and standardization.
This book is intended for the following groups of readers:
University students at senior levels and postgraduate students. Many universities around the world have started or will start to offer subjects related to multimedia technology and MMDBMSs. This book serves as a text for such subjects.
System designers and developers who want to learn various issues and techniques in developing multimedia database management systems.
Researchers who want to learn the current developments and new research directions in MMDBMSs.
Other professionals who want to know technical issues and the current status of MMDBMSs.

Introduction
Multimedia Data Types and Formats
Multimedia Database Design Issues
Text Document Indexing and Retrieval
Indexing and Retrieval of Audio
Image Indexing and Retrieval
Video Indexing and Retrieval
Integrated Multimedia Indexing and Retrieval
Techniques and Data Structures for Efficient Multimedia Similarity Search
System Support for Distributed Multimedia Databases
Measurement of Multimedia Information Retrieval Effectiveness
Products, Applications, and New Developments

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