DBMS Multimedia Database
Multimedia database is a collection of multimedia data which includes text, images, graphics (drawings, sketches), animations, audio, video, among others. These databases have extensive amounts of data which can be multimedia and multisource. The framework which manages these multimedia databases and their different types so that the data can be stored, utilized, and delivered in more than one way is known as a multimedia database management system.
The multimedia database can be classified into three types. These types are:
- Static media
- Dynamic media
- Dimensional media
The contents of a multimedia database management system can be:
- Media data: It is the actual data which represents an object.
- Media format data: The information such as resolution, sampling rate, encoding system, etc. about the format of the media data under consideration after is undergoes acquisition, processing, and encoding is the media format data.
- Media keyword data: Media keyword data are the keyword description related to the generation of data. This data is also known as content descriptive data. Examples of content descriptive data are place, time, date of recording.
- Media feature data: Media feature data contains data which is content dependent such as kind of texture, distribution of, and the different shapes present in the data.
The types of multimedia applications that are based on the data management characteristics are:
- Repository applications: An extensive amount of multimedia data stored along with metadata for retrieval purposes.
- Presentation applications: These involve the delivery of multimedia data subject to the temporal constraint. An optimal viewing or listening experience requires DBMS to deliver the data at a certain rate which offers the quality of service, which is above a particular threshold. This data is processed as it is being delivered.
- Collaborative work using multimedia information: It involves the execution of a complex task by merging drawings and changing notifications.
This still leads to a number of challenges to multimedia databases. These are:
- Modeling: Work in this area can improve the database versus information retrieval techniques.
- Design: The physical, conceptual, and logical design of multimedia databases is not addressed entirely leading to performance and tuning issues.
- Storage: The storage of databases on a standard disc can lead to problems like representation, mapping to disc hierarchies, compression, etc.
- Performance: Audio-video synchronization and audio playback applications are where physical limitations dominate. Parallel processing can reduce these problems, but these techniques have not been completely developed yet. Multimedia databases also consume a lot of processing power and bandwidth.
- Queries and Retrieval: Multimedia such as images, audio, video lead to retrieval and queries issues such as efficient query formation, query execution, etc.
Multimedia Database Applications:
- Documents and record management: Industries which keep a lot of documentation and records. Ex: Insurance claim industry.
- Knowledge dissemination: Multimedia database is an extremely efficient tool for knowledge dissemination and providing several resources. Ex: electronic books
- Education and training: Multimedia sources can be used to create resources useful in education and training. These are popular sources of learning in recent days. Ex: Digital libraries.
- Real-time monitoring and control: Multimedia presentation when coupled with active database technology can be an effective means for controlling and monitoring complex tasks. Ex: Manufacture control