Mpeg 7 Slide
-
Upload
cosmicfundoo -
Category
Documents
-
view
219 -
download
0
Transcript of Mpeg 7 Slide
-
8/3/2019 Mpeg 7 Slide
1/14
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.
-
8/3/2019 Mpeg 7 Slide
2/14
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.
-
8/3/2019 Mpeg 7 Slide
3/14
-
8/3/2019 Mpeg 7 Slide
4/14
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.
-
8/3/2019 Mpeg 7 Slide
5/14
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.
-
8/3/2019 Mpeg 7 Slide
6/14
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
-
8/3/2019 Mpeg 7 Slide
7/14
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.
-
8/3/2019 Mpeg 7 Slide
8/14
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.
-
8/3/2019 Mpeg 7 Slide
9/14
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.
-
8/3/2019 Mpeg 7 Slide
10/14
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.
-
8/3/2019 Mpeg 7 Slide
11/14
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.
-
8/3/2019 Mpeg 7 Slide
12/14
-
8/3/2019 Mpeg 7 Slide
13/14
MPEG-7
AYYAPPA DAS M.R.
Roll No. 00103015
S7 CSE-A
-
8/3/2019 Mpeg 7 Slide
14/14
MPEG-7 MULTIMEDIA DESCRIPTION
SCHEMES