It is not the conventional alphanumerical data. It is a collection of Text, Image, Audio or Video.
The information provided by multimedia data explainsmore than what a conventional data explains.
A multimedia database management system is aframework that manages multimedia data. It can also dooperations with those multimedia data.
The Multimedia data can be stored in 3 parts. They are Raw Data Registering Data Descriptive Data
Descriptive Data Information about content and structure Registering Data Data necessary for interpretation and identification i.e. Format Raw Data Unformatted Information Content i.e. pixels
In MMDBMS there are different data types. They are:- Text Image Audio Video
Character represents RAW data Registering data describe the Coding Descriptive data include data about layout, structuring.
Pixels represent RAW data. Registering data include length and height of image. Descriptive data are individual line, subject and surfaces.
Raw data contains the digital samples of audio. Registering data contains the properties of audio coding. Descriptive data contains the content of audio.
Pixel matrices represent the raw data. Registering data provides the number of images per second. Descriptive data provides scene description.
The operations are Input Output Modification Deletion Comparison Evaluation
Input Data will be written to the database. RAW and Registering data is mandatory. Descriptive data is optional. Output Reads the data from database as per the registering data.
Modification Changing of RAW, Registering and descriptive data. Deleting Removes the entry from database.
Comparison Search and Retrieval of stored data. Pattern Matching Technique is used. Evaluation Generation of descriptive data from Raw and Registering data.
Design of multimedia database is based on two different DBMS. They are:- ERDBMS OODBMS
OODBMS Different medias are represented by classes, whose instance variable include the data as internal state. ERDBMS Embedding new functions and types into RDBMS.
Libraries Educational Institutions Reverse Image searching Web albums
• optimized storage• efficient access• complex search is also possible• transaction protected multiuser mode• recovery