MPEG 7MOVING PICTURES EXPERT GROUP

Content1. What is MPEG?2. History of MPEG3. MPEG standards4. Need of MPEG-75. Objective6. MPEG Tools7. Technical Description8. Future expectation9. Conclusion10.References

WHAT IS MPEG ?Family of international standards.It includes MPEG-1, MPEG-2 and MPEG-

4,MPEG -7 etc.Basic components of MPEG are:

Elementary StreamsProgram streams Transport streams

History of MPEGFather of MPEG-Leonardo ChiariglioneEstablished in January 1988.First meeting was in May 1988It included 15 experts on compression

technology.As of late 2005, MPEG has grown to

include approx 350 members per meeting from various industries, universities, and research institutions.

ACHIEVEMENTSEngineering Emmy for Outstanding Achievement in Technological Development(MPEG and JPEG)-NATAS

An increasing number of broadcasting applications are based on MPEG technology

MPEG provides high end compression for digital media, preserving its quality.

MPEG STANDARDS• Established in 1992• Reasonable quality images and

sound at low bit rates.MPEG-1

• Established in 1994• Produce higher quality images at

higher bit rates.MPEG-2

• initially intended to cover HDTV• standard was dropped. MPEG-3

• finalized in end of 1998• sampling dimensions up to 176x144

pixels at low bit rates MPEG-4

MPEG-7

MPEG-7 is called “Multimedia Content Description Interface”

MPEG-7 is a standardized description of various types of multimedia information.

Allows fast and efficient searching

NEED of MPEG 7Large amount of audiovisual information

is available on the World Wide WebThe value of information often depends on

how easy it can be found, retrieved, accessed, filtered and managed.

MPEG-7 is used for quick and efficient searches for and/or filters various types of multimedia Data.

OBJECTIVES

•Still pictures•Graphics 3D models•Audio•Speech•Video•Composition information

Audiovisual data

content that has MPEG-7 descriptions associated

with it include

MPEG TOOLS

Descriptor (D): standardized “audio only”

and “visual only” descriptors.

Description Schemes (DS):

Contains Meta information that describes

the creation and production of the content

Description Definition Language (DDL):

It is based on XML language used to define the structural relations between descriptors.

System tools:

binarization, synchronization, transport

and storage of descriptors.

MPEG-7 uses the following tools:

SCOPE OF STANDARDMPEG-7 applications can be stored and

operate in both real-time and non real-time environments.

A ‘real-time environment’ here means that the description is generated while the content is being captured.

MPEG 7 PARTS AND FUNCTIONALITIESThe MPEG-7 Standard consists of the following

parts: Systems Description Definition LanguageVisual Audio Multimedia Description Schemes Reference SoftwareConformance TestingExtraction and use of descriptionsProfiles and levels Schema Definition

TECHNICAL DESCRIPTIONBased on:-

Multimedia Description SchemesVisualColor DescriptorsTexture DescriptorsShape DescriptorsMotion Descriptors and LocalizationOthers

MULTIMEDIA DESCRIPTION SCHEMES

Provide a standardized way ofDescribing important concepts related to AV content

descriptionContent management in order to facilitate searching,

indexing, filtering, and access.

Organized into the following areas as:Basic ElementsContent DescriptionContent ManagementNavigation and AccessContent OrganizationUser Interaction

VISUAL

Basic visual features:

•Color•Texture•Shape•Motion•Localization•Face recognition

Color Descriptors

There are seven

Color Descripto

rs:

•Color space•Color Quantization•Dominant Colors•Scalable Color•Color Layout•Color-Structure•GoF/GoP Color

Texture DescriptorsThere are three texture Descriptors:

Homogeneous Texture

Edge Histogram

Texture Browsing

Shape DescriptorsThere are three shape Descriptors:

Region Shape

Contour Shape

Shape 3D

Motion Descriptors and Localization

Motion Descriptor

s

•Camera Motion•Motion Trajectory•Parametric Motion•Motion Activity.

Localization

•Region locator •Spatio-temporal locator

Others•Retrieve face images which match a query face image.

Face Recogniti

on

•Audio signature Description Scheme•Musical instrument Description Schemes•General sound recognition •Spoken content Description Tools.

MPEG -7 Audio

APPLICATIONEducationJournalism Tourist informationEntertainment (searching a game)Investigation services (human characteristics

recognition)Geographical information systemsShoppingArchitecture, real estate, and interior designFilm, Video and Radio archives.Audiovisual content production etc.

FUTURE EXPECTATION

Binary encoding of descriptions

A decision must be made on the DDL

CONCLUSION1. Describe audiovisual information2. Address a wide variety of media types

including 3. It will operate in both real-time and non

real-time environments.4. “Real-time environment" -description is

generated at the same time as the content is being captured

REFERENCES

MPEG-7 - From Wikipedia, the free encyclopedia

MPEG Home Page at http://www.chiariglione.org/mpeg/

MPEG-7 ,Behind the Scenes ,Jane Hunter

THANK YOU