Multimedia database

About: Multimedia database is a research topic. Over the lifetime, 1404 publications have been published within this topic receiving 19856 citations. The topic is also known as: Multimedia database & MMDB.

Optimizing similarity-based image joins in a multimedia database

Abstract: Commonly used content-based image retrieval systems focus on the problem of finding similar images for a given single query object out of a database of media objects. We consider a similarity-based image join of two image tables, where the image data components are represented by their respective feature vectors. For each image of the first table, similar images are looked up in the second table. Matching tuples are combined. We consider multiple joins which allows one to join a previous join result to another image table, and so on. Thus, each multiple join result tuple contains n images, if n tables are joined. An image of the result tuple is therefore not only similar to the image from its join partner, but also to the image similar to it. In this context, the paper presents processing and optimizing strategies for multiple similarity-based image joins and a cost model for integrating them in a multimedia database. The cost model is validated by an X-tree reference implementation. The presented strategies in this paper are currently been implemented in Oracle Multimedia.

Hybrid Multi-Feature Indexing for Music Data Retrieval

Abstract: The management of large collections of music data in a multimedia database has received much attention in the past few years. In the most of current works, the researchers extract the features, such as melodies, rhythms and chords, from the music data and develop indices for helping to retrieve the relevant music efficiently. However, there is only a small number of existing approaches introduced multi-feature index structures for music queries while most of researches are for developing single feature indices. The existing music multi-feature index structures are memory consuming and lack of scalability. In this paper, we will propose a hybrid index structure which can save lots of memory for music multi-feature indexing. Our experimental results also show that the new approach outperforms existing multi-feature index scheme for memory needed.

Specification of a query language for multimedia database systems

Abstract: We propose an abstract multimedia query calculus that is built upon a set of generalized n-ary spatio-temporal relations and the object-oriented modeling paradigm for multimedia data. The proposed calculus allows the declaration of multimedia data, specification of spatio-temporal logic, formulation of spatio-temporal queries for content-based retrieval of image/video data, and composition/retrieval of multimedia documents.

Adaptive community-based multimedia data retrieval in a distributed environment

Abstract: The ever increasing demand of large scale multimedia applications has made the development of effective multimedia database systems an important direction of research. Distributed architecture is widely used in this setting due to the large volume of data involved. This introduces a new challenge to adaptive multimedia data retrieval. Several issues have to be considered such as how trust can be propagated in an autonomous environment, and how to aggregate the results from individual databases and work out an overall ranking. In this paper, we propose a multimedia data retrieval method in a heterogeneous distributed database system. An agent reputation model that is based on social network analysis methods is employed for handling trust in the heterogeneous environment. An adaptive data retrieval method is utilized for an automated querying process based on the reputation model. Sub-group analysis is conducted for better support of collaborative ranking and community-based search. Experiment results show good performance of the proposed method.

Multimedia databases

Abstract: Multimedia databases (MMDBs) must cope with the increased usage of huge amounts of multimedia data in several diverse applications. These include: digital libraries, manufacturing and retailing, art and entertainment, journalism and so forth. Some inherent qualities of multimedia data have direct and indirect impacts on the design and development of a multimedia database. MMDBs need to have all the functionalities of traditional databases. In addition, they must have new and enhanced functionalities and features. Broadly, MMDBs are required to provide unified frameworks for storing, processing, retrieving, transmitting, and presenting a variety of media data types in a wide variety of formats. At the same time, they must adhere to numerous constraints that are absent in traditional databases. The article considers the issues involved in the design of a multimedia database system are numerous and quite complex.