Service Communautaire d'Information sur la Recherche et le Développement - CORDIS

Integrated MPEG-4 viewer

This component is the internally used media viewer, which handle large types of multimedia data: images, sound, 3D objects etc. It is used to browse the catalogue’s content. The MPEG-4 standard under development will provide a set of technologies to satisfy the needs of authors, service providers and end users alike. For authors, MPEG-4 will enable the production of content that has far greater reusability, has greater flexibility than is possible today with individual technologies such as digital television, animated graphics, World Wide Web (WWW) pages and their extensions. Also, it will be possible to better manage and protect content owner rights.

MPEG-4 will offer for network service providers transparent information which will be interpreted and translated into the appropriate native signalling messages of each network with the help of relevant standards bodies having the appropriate jurisdiction. However the foregoing excludes Quality of Service considerations, for which MPEG-4 will provide a generic QoS parameter set for different MPEG-4 media. The exact mapping for these translations are beyond the scope of MPEG-4 and are left to be defined by network providers. Signalling of the QoS information end-to-end, will enable transport optimisation in heterogeneous networks.

For end users, MPEG-4 will enable many functionalities which could potentially be accessed on a single compact terminal and higher levels of interaction with content, within the limits set by the author. An MPEG-4 applications document exists which describes many end user applications including, among others, real time communications, surveillance and mobile multimedia.

For all parties involved, MPEG wants to avoid the emergence of a multitude of proprietary, non-interworking formats and players. MPEG-4 achieves these goals by providing standardised ways to:
- Represent units of aural, visual or audiovisual content, called "audio/visual objects" or AVOs. (The very basic unit is more precisely called a "primitive AVO"). These AVOs can be of natural or synthetic origin; this means they could be recorded with a camera or microphone, or generated with a computer;

- Compose these objects together to create compound audiovisual objects that form audiovisual scenes;

- Multiplex and synchronise the data associated with AVOs, so that they can be transported over network channels providing a QoS appropriate for the nature of the specific AVOs; and

- Interact with the audiovisual scene generated at the receiver’s end.

More information on the WORLDS STUDIO project can be found at

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EADS - Defence & Communication Service
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