MM_tanvi_database Operations - Copy

8/2/2019 MM_tanvi_database Operations - Copy

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Presented By:

Tanvi Sharma, 11-696

M.E.(I.T), 2nd semester

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*MDBMS must offer all the above data types (i.e.

raw data type , registering data type,

descriptive data type)

*Corresponding Operations for archival and

retrieval

*Mediarelated operations handled as a part of

query languages (e.g. SQL)


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*Input (insert/record) : data will be written to thedatabase.

Raw and registering data always required.

Descriptive data can be attached later.

MDBMS may face problems in choosing the properdisk/server(if during i/p operation,length of data not

known)

*Output (play) : reads the raw data from databaseaccording to the registering data.

Huffman table required for decoding of a jpeg image

Transmission of the raw data follows.


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*Modification : considers the raw data

Should be done by an editor.

For motion video : cutting with in/out fading.

For audio data: volume, bass, treble, balance can alsobe modified.

Modification function attributes are stored inregistering data.

Data conversion from one format to another.(registering data must be modified along with raw

data)

Cntd..


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Also understood as Transformation from one mediumto another medium (e.g. text-to-speech).

The conversion function is implemented outside the

DB.

In editor:

Reading data externally converting into another

medium transformed data recorded back into thedatabase


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*Deletion: the consistency of the data must bepreserved. i.e. if a data type entry deleted, all related

types should also be deleted

*Comparison: many queries in MDBMS for search andretrieval of stored data.

Individual patterns are simply comparedwith the storedraw data.

(not very successful)

With Pattern Recognition: Pattern from raw data may bestored as registering data and a comparison is based on thispattern. (only used for certain applications)

Cntd


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*Comparisons based on content-oriented descriptive

data.

e.g. user enters a nominal phrase with a limited

set of words. MDBMS converts this input into

predicates.

( synonyms are used and are managed by system)

*Evaluation: The goal is to evaluate the raw and

registering data to generate the correspondingdescriptive data.

e.g. during storage of facsimile documents, OCRcanbe used.


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*Main issue for implementation and usage of an

MDBMS is the Database Model

*The data types and operations can be integrated

in both; relational model and object-oriented

model.

*Abstract data types of all media can be defined

with descriptive attributes according to their

formats.


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e.g.

Attribute name Attribute Type Attribute Value

Height: Integer; 480

Width: Integer; 640

Encoding: Uncompressed; YUV

Stream_encoding: S_mode; PAL

Pixel_depth: Integer; (8,8,8)

Rate: Signed integer; 25

Attributes of an uncompressed video


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*Simplest possibility to implement a

multimedia database. (since all attributes

of different media are defined in

advance)

Main advantage: Compatibility withcurrent database applications


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Student (Admission_number Integer,

Name String,

Picture Image,

Exercise_device_1 Video,

Exercise_device_2 Video)

Athletics (Admission_number Integer,

Qualification Integer,

high_jump Video,

mile_run Video)

Swimming (Admission_number Integer,crawl Video)

Analysis (Qualification Integer,

Error_Pattern String,

Comment Audio)

Attributes:picture,

exercise

devicesDifferent media types: image, video

Other entries of database

Analysis of different types of relational models

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*Type 1 Relational model: the value of a certainattribute can be fixed over the particular set of

corresponding attribute types.

e.g. frame rate of a motion video can be fixed

*Type 2 Relational model : the variable number ofentries can be defined

e.g. individual disciplines (swimming and athletics)

of each admitted student are identified through their

admission numbers


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*Type 3 Relational model : in addition to fixed

values of attributes and variable number ofentries, an entry can simultaneously belong to

several relations.

e.g. a video entry of a student performing ahigh jump can be assigned to the relation

athletics for qualification purposes as well as

to the relation analysis for an educationalapplication with analysis of typical errors.

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*Instead of defining relations, classes with objects are

defined These objects are put into relations via a class hierarchy

*Semantic specialization of classes and objects.

e.g. Sports institute : main class

Athletics, swimming: subclasses of sports institute

Students : objects of each subclass

*Offer good information navigation and flexible

presentation*Important query operations (e.g. getting element from a

set, include an element into a set) are incompletely

supported(unlike relational model)

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*Jasmine is an Object-Oriented MMDB and has anapplication known as Studio as its development

environment.

*It comes with four multimedia classes:

*Picture

*Image

*Video

*Audio

Manipulation and compression facilities .

Has been made to fit well withJava Media Framework


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THANK YOU

MM_tanvi_database Operations - Copy

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