Multimedia DataBases

 Multimedia DataBases
• Multimedia data typically means digital images, audio,
video, animation and graphics together with text data.
• The acquisition, generation, storage and processing of
multimedia data in computers and transmission over
networks have grown tremendously in the recent past
• consistency, concurrency, integrity, security and
availability of data

Contents of MMDB

An MMDB needs to manage several different types of information
pertaining to the actual multimedia data. They are:
• Media data
This is the actual data representing images, audio, video that are
captured, digitized, processes, compressed and stored.
• Media format data
This contains information pertaining to the format 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 keyword data
This contains the keyword descriptions, usually relating to the
generation of the media data. 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 This is also called as
content descriptive data.
• Media feature data
This contains the features derived from the media data. A
feature characterizes the media contents. For example, this could
contain information about the distribution of colors, the kinds of
textures and the different shapes present in an image. This is also
referred to as content dependent data. The last three types are
called meta data as they describe several different aspects of the
media data. The media keyword data and media feature data are
used as indices for searching purpose. The media format data is
used to present the retrieved information.

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