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  • MPEG is a group of people that meet under ISO guidelines to generate standards for digital audio and video. MPEG meets roughly 5 to 6 times a year for one week each time. In between meetings a great deal of work is done by the members. ISO: International Organization for Standardization IEC: International Electro-technical Commission JTC1: Joint Technical Committee 1 SC29: Sub-committee 29 WG11: Working Group 11 (moving pictures with audio)
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    • 3. •3 MPEG-7: •An international standard for descriptions and description systems •Goal: To search, identify, filter and browse audiovisual content •Image/Video Retrieval •Text-based Retrieval •Content-based Retrieval INTRODUCTION
    • 4. •4 Why DO WE NEED MPEG-7 ? N e e d • Content Management • Fast & Accurate Access • Personalized Content Production and Consumption • Automation + Support for Advanced Query •Visual •Audio •Sketch
    • 5. MPEG: A BRIEF hISTORy •5  MPEG: Moving Picture Experts Group  ISO / IEC/JTC1/SC29/WG11 A Working Group of ISO/IEC in charge of the Development of Standards for Coded Representation of Digital Audio and Video Established in 1988
    • 6. MPEG: A BRIEF hISTORy •6  MPEG-1: Interactive CD and MP3 11 / 1992  MPEG-2: DTV, STB, DVD 11 / 1994  MPEG-4: Web and Mobility ver1: 09 /1998 ver2: 11 /1999  MPEG-7: ??? 09 / 2001  MPEG-21: Multimedia Framework 11 / 2001
    • 7. MPEG-7: WhAT IS IT ? •7 THE MPEG 7THE MPEG 7 STANDARDSTANDARD THE MPEG 7THE MPEG 7 STANDARDSTANDARD Content Description of Various Audio Visual Information IS NOT a COMPRESSION Standard similar to MPEG-1/2/4 or their Extension IS NOT a STANDARD for FEATURE EXTRACTION/MATCHING Types of Audio Visual Information • Audio, Speech • Moving video, still pictures, graphics • Information on how objects are combined in scenes Types of Audio Visual Information • Audio, Speech • Moving video, still pictures, graphics • Information on how objects are combined in scenes
    • 8. MPEG-7: APPlicAtion ArEAs Storage and retrieval of audiovisual databases (image, film, radio archives) Broadcast media selection (radio, TV programs) E-commerce and Tele-shopping (searching for clothes / patterns) Remote sensing (cartography, ecology, natural resources management) Entertainment (searching for a game, for a karaoke) Cultural services (museums, art galleries) Journalism (searching for events, persons) Intelligent multimedia presentations Educational applications Bio-medical applications
    • 9. MPEG-7: MAin ElEMEnts •9 Descriptors (D) syntax and semantics of each feature representation Description Schemes (DS) structure and semantics of the relationships between components Description Definition Language (DDL) creation of new DS’s modification/extension of existing DS’s
    • 10. MPEG-7: MAjor FunctionAlitiEs •10 Systems (ISO / IEC 15938 ) Description Definition Language (ISO / IEC 15938) Visual (ISO / IEC 15938) Audio (ISO / IEC 15938) Multimedia Description Schemes (ISO / IEC 15938)
    • 11. MPEG-7: systEMs •11 It defines tools to:  manage and protect intellectual property Includes currently the binary format for encoding  synchronize between content and description  provide for efficient storage and transport
    • 12. MPEG-7: DDl AnD its coMPonEnts •12  A language that allows the creation of new Description Schemes and, possibly, Descriptors.” “It also allows the extension and modification of existing Description Schemes.” Description Definition Language: It is based on XML Schema Language Consists of XML Schema Structural Components XML Schema Data Types MPEG-7 Specific Extensions
    • 13. MPEG-7: AuDio •13 Sound Effects • High-Level Audio Description Tools (Ds & DSs) •Instrumental timbre description tools •Sound recognition tools •Spoken content description tools •Melody description tools (facilitate query-by- humming)
    • 14. MPEG-7: VisuAl •14 Consist of basic structures and description Color quantization, dominant, scalable, color-structure, layout, GoF/GoP Texture Shape region-based, contour-based, 3D Motion camera motion, motion trajectory, parametric motion, motion activity
    • 15. DETAILED TECHNICAL DISCRIPTION VISuAL DESCRIPTORS It describe tools included in the std consist of basic structure & descriptor that covers the feature like- Color Descriptors Texture Descriptors Shape Descriptors Motion Descriptors for Video
    • 16. BASIC VISuAL STRuCTuRES •16 Grid Layout 2D-3D Multiple View Time Series Spatial 2D Coordinates Temporal Interpolation
    • 18. COLOR SPACES In this description following color space are supported- RGB, YCrCb, HSV, MONOCHROME etc. COLOR LAYOuT It effectively represent the spatial description of color of visual signals in a very compact form. It Clusters the image into 64 (8x8) blocks COLOR STRuCTuRE It is a color feature descriptor that captures both color content & information about the structure of this content.
    • 19. TExTuRE DESCRIPTORS Homogenous Texture Descriptor Non-Homogenous Texture Descriptor (Edge Histogram & Texture) HOmOgENOuS TExTuRE It has emerged as an important visual primitive for searching & browsing through large collection of similar looking pattern. The computation of this descriptor is based on filtering using scale and orientation selective kernels.
    • 20. NON-HOmOgENOuS TExTuRE It is useful for representing homogenous texture for browsing type application & requires only 12 bit (max). It provide perceptual characteristic of texture similar to human characterization in terms of regularity, coarseness & directionality. Represents the spatial distribution of five types of edges. Dividing the image into 16 (4x4) blocks. Generating a 5-bin histogram for each block. It is scale invariant.
    • 21. SHAPE DESCRIPTORS Region-based Descriptor Contour-based Shape Descriptor 2D/3D Shape Descriptor
    • 22. Region-based descRiptoR The shape of an object may consist of either a single region or a set of region as well as some holes in the object. Advantages: Describes complex shapes with disconnected regions. Robust to segmentation noise. Small size , Fast extraction and matching.
    • 23. contouR-based descRiptoR The contour shape descriptor captures characteristic shape feature of an object or region based on its contour. It uses so called curvature scale- space representation, which captures perceptually meaningful features of the shape.
    • 24. •24 audio MPEG-7 audio provide stuctures bulding upon some basic structures from the MDS for discribing audio content. FRaMeWoRK • It contains low level tools designed to provide a basis for the construction of higher level audio application. • By providing a common platform for the structure of description & the basic semantics for commonly regarded audio feature.
    • 25. •25 pRoFiLing •Similar to all MPEG Standards profiling of the tools specified in the standard will play an important role to allow deployment of MPEG-7 technology with reasonable costs & complexity. •A profile is a set of functionality for one or more classes of application. •The keyword to define profile is functionality.
    • 26. •26 Mpeg-7 teRMinaL •MPEG-7 system provide the means to represent coded multimedia content description . •The entity that makes use of such coded representation of the multimedia content description is generally referred as the ISO/IEC 15938 terminal or ‘MPEG-7 terminal’. conFoRMance testing •It includes the guideline & procedures for testing conformance of MPEG-7 implementation both for description & terminals.
    • 27. •27 concLusion MPEG-7 is advance version. It is better than below versions of MPEG. Because, It includes new audio , video tools. It is not aimed at any one application in particular rather the elements that standardizes support as broad a range of applications as possible.
    • 28. •gRoup MeMbeRs: 1.SAGAR NIKAM 2. NILESH JAISWAR •guide: M/S PRADNYA VARTAK