1. MPEG 4 Shaojie Zhang Anjum Gupta Dept. of Computer Science and Engineering

2. Outline Overview Technical Detail Industry and Market Conclusion

3. Overview MPEG-1 - Error free environments MPEG-2 - Broadcast TV (SD and HD) MPEG-4 - Object based coding MPEG-7 - Multimedia description MPEG-21 - Seven element initiative for multimedia deployment

4. What is MPEG-4 An open toolbox to build bitstreams and decoders for multimedia content: Synthetic interactive graphics content To accommodate various user devices Lower bit rate encoding

5. MPEG 4 – Basic Approach Object Based Encoding –MPEG-4 audiovisual scenes are composed of several media objects. Still objects (e.g. fixed background) Video objects (e.g. a talking person) Audio objects

6. Encoding Example

7. An example of an MPEG-4 Scene

8. Scene Description Format An MPEG-4 scene structure is represented as a DAG. Each node is a media object. Multiplexed with the media objects.

9. Flexibility within MPEG-4 Various algorithms to handle special cases. The stream is made of atomic units called Video Objects (VOs). Audio Visual Objects (AVOs) are combined to create a scene.

10. Bit rate variability Generic coder is extended by adding “Shape” input.

11. Coding Tools and Algorithms VLBV (Very Low Bit-rate Video) core can be extended by adding more information.

12. MPEG-4 Encoding

13. Decoding

14. An Application

15. Companies having MPEG-4 products Index of Companies 1.Ahead SoftwareAhead Software 2.Amphion SemiconductorAmphion Semiconductor 3.Apple ComputersApple Computers 4.Bitmanagement Software GmbHBitmanagement Software GmbH 5.Dicas Digital Image Coding GmbHDicas Digital Image Coding GmbH 6.DivXNetworks, Inc.DivXNetworks, Inc. 7.Emblaze ResearchEmblaze Research 8.EnvivioEnvivio 9.Equator Technologies, Inc.Equator Technologies, Inc. 10.Fraunhofer Institute IIS-AFraunhofer Institute IIS-A 11.Hantro Products OyHantro Products Oy 12.Harmonic Inc.Harmonic Inc. 13.iVAST Inc.iVAST Inc. 14.Nextreaming CorporationNextreaming Corporation 15.Octaga ASOctaga AS 16.Philips ElectronicsPhilips Electronics 17.ProdysProdys 18.Sci-worx GmbHSci-worx GmbH 19.Sorenson MediaSorenson Media 20.Soundball, Inc.Soundball, Inc. 21.ToshibaToshiba 22.Tvia, Inc.Tvia, Inc. 23.VBrick Systems, Inc.VBrick Systems, Inc. 24.VCS Video Communication Systems AGVCS Video Communication Systems AG 25.VideoSpheres Inc.VideoSpheres Inc. 26.Xilinx Inc.Xilinx Inc.

16. MPEG Market Penetration US Market Penetration – growth from year 0 (introduction) – 10 (From: The Yankee Group).

17. MPEG Media Distribution US Video-On-Demand Subscriber Forecasts (From: The Yankee Group)

18. MPEG 4 Vs Other Technologies

19. Conclusion MPEG-4 enables very low bit-rate multimedia communications. MPEG-4 is a dynamic standard, that is continuously being improved. Is being accepted in the industry applications. Expanding demand in the market.

20. References ISO/IEC JTC1/SC29/WG11 N4668 ISO/IEC JTC 1/SC 29/WG 11N2826 ISO/IEC JTC 1/SC 29/WG 11N5504 MPEG-4 Industry Forum (http://www.m4if.org)

21. Acknowledgement Dr. Wo Chang, NIST, U.S. Dr. Kai-Kuang Ma, NTU, Singapore