Registering Data - Size & coding details of raw data.Synchronize different media types while presenting to user.Provide transparent view of geographically distributed data.Offer a variety of user-friendly query systems suited to different kinds of media.Integrate different data model.-(R database, OO database).Support different computing platforms and operating systems.Handle a variety of data compression and storage formats.Manage different types of input, output, and storage devices.Allows easy querying of multimedia data.Failures of transactions should not affect the persistent data storage.Ensures database consistency between transactions.Data objects can be saved and re-used by different transactions and program invocations.Separate the database and the management from the application programs.Data items do not need to be duplicated for different programs invocations.Large transactions must be done in a reliable fashion, since it take long time.Data transfer of real time activity gets higher priority than other database activities.Same data can be accessed through different queries by different applications.View Specific & Simultaneous Data Access.Query must be descriptive & content oriented.Corresponding Storage Media, Data must be stored & managed according to their specific characteristics of the storage media.3D game and Computer Aided Drafting (CAD) programs.Data types are categorized into 3 classes.Audio: aural recordings in a string of bits in digitized form.
Video: sequenced image data at specified rates.The media format data is used to present the retrieved information.The media keyword data and media feature data are used as indices for searching purpose.The last three types are called meta data as they describe several different aspects of the media data.This is also referred to as content dependent data. For example, contain information about the distribution of colors, the kinds of textures and the different shapes present in an image. Media feature data - contains the features derived from the media data.This is also called as content descriptive data. Media keyword data - contains the keyword descriptions, For example, for a video, this might include the date, time, and place of recording, the person who recorded, the scene that is recorded, etc.Media format data - contains format information of the media data after it goes through the acquisition, processing, and encoding phases.For instance, this consists of information such as the sampling rate, resolution, frame rate, encoding scheme etc.Media data - actual data representing images, audio, video that are captured, digitized, processes, compressed and stored.It provides support for multimedia data types.It is a framework that manages different types of data potentially represented in a wide diversity of format on a wide array of media sources.What Is Multimedia Database Management System (MMDBMS) ?.paths or references of images where the actual image stored elsewhere, such as on an optical storage subsystem.Since existing relational and OO databases comprise(satisfy) the basic requirements of any database, but to store multimedia data -MMDB’s were evolved, that includes.A multimedia database is a database that include one or more primary media file types such as.MMDB stores data in the form of, text, images, graphic, animation, audio and video.Multimedia database is a collection of related multimedia data such as TEXT, GRAPHIC, VIDEO, ANIMATION.
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