• The Multimedia and Hypermedia Experts Group (MHEG) was formed by a subcommittee of the International Standards Organization (ISO) to address the problems of trying to design a software-neutral interactive multimedia presentation tool.• In this way, a presentation created on one hardware platform should be viewable on others.
• To provide a simple, easy to implement framework for multimedia applications using the minimum system resources.• To define a digital form for presentations, which may run on different machines no matter what the platform are.• To provide extensibility
•CD-ROM based encyclopedias,•Interactive books for learning,•Interactive home shopping,•Video and news on
• MHEG 1:Its the generic standard for encoding multimedia objects.• MHEG-2 is exactly the same as MHEG-1, except that the classes are defined in SGML (Standard Generic Markup Language) instead of ASN1(Abstract Syntax Notation version 1).• MHEG-3 is an extension to MHEG-1. This part of the standard was created to increase the interactivity between multimedia objects and the environments that they run in.
• MHEG-4 was a simple extension and is used to register objects and formats supported by MHEG, e.g. MPEG, JPEG etc.• MHEG-5 was designed to extend the class hierarchy of the initial MHEG-1 specification. This extended hierarchy contains a set of new classes that can be used to develop client / server multimedia applications across platforms with limited resources. This ensures that MHEG-5 conformant applications will run on conformant terminals.
• MHEG-6 extends the declarative MHEG-5 approach with procedural code capabilities typical of a scripting language. It defines the interface and a script engines runtime environment on top of an MHEG-5.• MHEG-7, a new standard, addresses the conformance and interoperability of MHEG-5 engines and applications.
• MHEG defines the abstract syntax through which presentations can be structured through which two computers may communicate. • MHEG model defines a number of Classes • Describe the way AV is displayed • Describe the way of user interaction • Describe the way of displaying control • The Properties of Class • attributes that make up an object’s structure • events that originate from an object • actions that target an object
• There are many more classes defined by MHEG. Some are concerned with the structure of the presentation and grouping of objects, whilst others are involved in the interchange of information between machines.
• MHEG-5 is the world largest deployment in presentation in U.K,AUS,IRELAND,NEW ZELAND,HONG KONG & S AFRICA.• It supports HD broadcast;• Enhanced clarity in the graphic interface;• Non Destructive tuning;• Two way interactive functionality;• In client server model MHEG-5 applications are stored on server and downloaded to the terminal for the RTE to interpret.
• The outlook for MHEG is good.• The ideas are not yet an ISO standard• Several large companies including IBM are already developing software that conforms to the standard.• This standard will allow the interchange and playback of multimedia information on any platform.
• Paper • "MHEG-5-aims, concepts, and implementation issues”, M. Echiffre, C. Marchisio, P. Marchisio, P. Panicciari, S. Del Rossi, IEEE Multimedia, Vol.5 • “MHEG: An Introduction to the future International Standard for Hypermedia Object Interchange” - Roger Price; Proceedings of the conference on Multimedia
• Web Documents • About MHEG ( A Guided Tour to MHEG ... ) • http://www.mhegcentre.com/mheg/tour.htm • Multimedia Standards • http://www.ctf.imc.exec.nhs.uk/published/step/stepdocs/H224- 2.html • MHEG - A Multimedia Presentation Standard • http://www-dse.doc.ic.ac.uk/~nd/surprise_96/ journal/vol2/srd2/article2.html • MHEG-5: An Overview • http://www.fokus.gmd.de/ovma/mug/archives/doc/mheg- reader/rd1206.html