Mpeg 7 Slide

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INTRODUCTION

Multimedia content description standard.Addresses how humans expect to interact with

computer systems.

Part of ISO.Defines standards for digital audio and video.Primal task to develop a format to play back video

and audio in real time from CD.

Well known standardsMPEG-1, 2, 4 &7.MPEG-7 focuses on representing information about

the content, not the content itself.

Main goal to provide a rich set of standardized toolsto describe the multimedia content.


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DIFFERENT VIDEO FORMATS

AVI FORMAT

Oldest format in 8086 world.Audio video interlaced.Created by Microsoft.Maximum resolution of 160*120 pixels with a

refresh rate of 15 frames per second.

Popular as first video editing systems andsoftware appeared that used AVI by default.

Examples-Fasts AV master, Micro/PinnaclesDC10 to DC50.

Disadvantages : Manufacturers adapted AVIformat according to their own requirements, AVI

format is subject to additional restrictions under

windows 98 which makes professional work at

higher resolutions more difficult.


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MPEG-1

Released in 1993.Objective to achieve acceptable frame rates and

the best possible image quality for moving

images and their sound signals for media with a

low band width (1-1.5 M bit/s).

Design goal is ability to randomly access asequence within half a second, without a

noticeable loss in quality.

For most home user and business applications.

MPEG-2

Released in 1995.Basic structure same as that of MPEG-1.Allows data rate up to 100 M bit/s.Used for TV, video films on DVD-Rom.


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MPEG-4

Highest video quality possible for extremely lowdata rate (10 K bit/s to 1 M bit/s).

Organization of the image contents intoindependent objects inorder to process them

individually.

Used for video transmission over internet.MPEG-7

Latest MPEG project.Can be used independently of other MPEG

standards.


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MPEG-7 TECHNICAL ACTIVITIES

Standard for defining features of multimediacontent .

Users can search, browse and retrieve contentseffectively and efficiently.

MPEG-7 define a multimedia library of methodsand tools.

MPEG-7 standardizes: A set of descriptors (D)

A set of description schemes (DS) A language that specifies description schemes,

the Description Definition Language (DDL)

One or more ways (textual, binary) to encodedescriptions


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ORGANIZATION OF MPEG-7 DESCRIPTION

TOOLS

Basic elements at lower level: basic data types ,mathematical structure , schema tools , linking and

media localization tools.

Schema tools specifies elements for creating validMPEG-7 schema instance documents and descriptionfragments.

Based on this lower level content description andmanagement elements can be defined.

These elements describe content from several viewpoints. Currently five view points:

Creation and production Media Usage Structural aspects Conceptual aspects

Creation and production: Contains media informationthat describes creation and production of content.


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Usage: Contains media information related to usageof content.

Media: Contains description of storage media.Structural aspects: Contains description of AV

content from the viewpoint of its structure.

Conceptual aspects: Contains a description of AVcontent from view point of its conceptual notations.

Tools for navigation and access and contentorganization which addresses organization of content

by classification.

User interaction: Describes users preferences for theconsumption of multimedia content and usage history.

MPEG-7 WORKING GROUPS

Concentrates on specification of description tools(Descriptors and Description schemes).

The base for DDL is XML scheme language.


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MPEG-7 AUDIO GROUP

Develops a range of description tools rangingfrom generic audio descriptors to more

sophisticated description tools like Timbre.

MPEG-7 VIDEO GROUP

Four groups ofdescription tools: Color ,texture,shape and motion.

MPEG-7 MULTIMEDIA DESCRIPTION SCHEMES

GROUP

Develops description tools dealing with genericand audiovisual features.

Mainly deals with content description andcontent management.

MPEG-7 IMPLEMENTATION STUDIES GROUP

Designing and implementing MPEG-7 referencesoftware (XM).

MPEG-7 SYSTEMS GROUP

Develops DDL.


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MPEG-7 APPLICATION DOMAINS

Board range of applications.Ranges from multimedia digital libraries

,broadcast media selection ,multi media editing

,home entertainment devices.Make web as searchable for multimedia content

as it is searchable for text today.

All domains making use of multimedia willbenefit from MPEG-7.


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ADVANTAGES

MPEG standards have been successful in themarketplace.

Taking advantage of MPEG-7 expertise.Interoperability: rapid uptake of MPEG-7, as it is

built on enabling technologies and standards.

Data exchange between subsidiaries.Market potential for MPEG-7 applications.MPEG-7 will enable a new generation of

multimedia applications.

MPEG-7 tools for killer applications.MPEG-7 intellectual property and management

protection.

MPEG-7 makes content more valuable.MPEG-7 provides a seamless path towards

increasingly intelligent content management

systems.


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MPEG-7

AYYAPPA DAS M.R.

Roll No. 00103015

S7 CSE-A


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MPEG-7 MULTIMEDIA DESCRIPTION

SCHEMES

Mpeg 7 Slide

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