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What is Multimedia ?

is a computer-based interactive communications

process that incorporates text, graphics, sound,

animation, and video

Why Multimedia?

Fun

Interactive Interesting

Money-making

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What is Database?

Place to store data?

Manipulate data?

Combine? Analyze?

What we expect from database?

Safety?

Speed? Space?

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What is DBMS?

Different between DB, DBMS, Relational

DBMS?

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Multimedia Data?

Text

Audio

Video Images

Graphical Object (2D and 3D)

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Form of text can vary greatly..

Basic ASCII character?

Shadow?

Moving? Color?

Type?

Size?

Font?

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Compression?

Quality?

Type?

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Size?

Type?

Images?

Signal?

Digitized?

Transmission?

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Type?

Bitmapped?

Vector?

Size? Loosy?

Lossless?

Resolution?

Type?

1-bit?

8-bit?

24-bit?

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is a framework that manages different types

of data potentially represented in a wide

diversity of formats on a wide array of media

sources.

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Integration

Data items do not need to be duplicated for

different programs

Data independence

Separate the database and the management from

the application programs

Concurrency control

allows concurrent transactions

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Persistence

Data objects can be saved and re-used bydifferent transactions and program invocations

Privacy

Access and authorization control Integrity control

Ensures database consistency betweentransactions

Recovery

Failures of transactions should not affect thepersistent data storage

Query support

Allows easy querying of multimedia data

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In addition, an MMDB should: have the ability to uniformly query data (media data,

textual data) represented in different formats.

have the ability to simultaneously query different mediasources and conduct classical database operations acrossthem.

query support

have the ability to retrieve media objects from a localstorage device in a smooth jitter-free (i.e. continuous)manner.

storage support

have the ability to take the answer generated by a queryand develop a presentation of that answer in terms ofaudio-visual media.

have the ability to deliver this presentation in a way thatsatisfies various Quality of Service requirements.

presentation and delivery support

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Allow easy query of multimedia data

What is query by content?

Can query be specified as a combination of media

(examples) and text description?

How to handle different MM objects?

What query language should be used?

Allow efficient query of multimedia data

What algorithms can be used to efficiently retrieve

media data on the basis of similarity?

How should we index the content of different MM

objects?

How to provide traditional DBMS supports?

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How do the following (standard) storage devices work?

disk systems

CD-ROM systems

tape systems and tape libraries

How is data laid out on such devices?

How do we design disk/CD-ROM/tape servers so as to

optimally satisfy different clients concurrently when

these clients execute the following operations

playback rewind

fast forward

pause

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The content of multimedia data is often

captured with different capture

techniques (e.g., image processing) that may

be rather unreliable

Queries posed by the user in multimedia

databases often cannot come back with a

textual answer. Rather, the answer to a

query may be a complex multimediapresentation that the user can browse at

his/her leisure.

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Multimedia data is large and affects the

storage , retrieval and transmission of

multimedia data.

In case of video and audio databases time toretrieve information may be critical ex(Video

on demand).

Automatic feature extraction and Indexing