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Hair Kalva, Lai-Tee Cheok, Alexandros Eleftheriadis. MPEG-4 Systems and Applications. In ACM Multimedia, Orlando, FL, November 1999.

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MPEG-4, under the auspices of the ISO, is specifying tools to enable object-based audio-visual presentations. These include tools to encode individual objects, compose presentations with objects, store these object-based presentations and access these presentations in a distributed manner over networks. The main distinguishing feature of object-based audio-visual presentations is the scene composition at the user terminal. The objects that are part of a scene are composed and displayed at the user end as opposed to encoding the composed scenes as is done in the case of MPEG-2. Such object-based representation and presentation has several benefits including compression efficiency and interaction with individual objects. The MPEG-4 Systems specification defines an architecture and tools to create audio-visual scenes from individual objects. The systems part of the MPEG-4 standard has the tools that enable interactive object-based audio-visual applications. The driving principle behind the systems specification is the separation of data and meta-data. The scene description and object descriptor framework are at the core of the systems specification. The MPEG-4 scene description, also referred to as BIFS, is based on VRML and specifies the spatio-temporal composition of objects in a scene. BIFS update commands can be used to create scenes that evolve over time. The object descriptor framework is an extensible model for describing the objects and inter-object synchronization. A generic server command structure is specified to enable application specific user interaction. DMIF or the Delivery Multimedia Integration Framework is a general application and transport delivery framework specified by MPEG-4. In order to keep the user unaware of underlying transport details MPEG-4 defined an interface between user level applications and the underlying transport protocol called the DMIF Application Interface (DAI). The DAI provides the required functionality for realizing multimedia applications with QOS support. This architecture allows creation of complex presentations with wide-ranging applications.

BibTex Reference

   Author = {Kalva, Hair and Cheok, Lai-Tee and Eleftheriadis, Alexandros},
   Title = {MPEG-4 Systems and Applications},
   BookTitle = {ACM Multimedia},
   Address = {Orlando, FL},
   Month = {November},
   Year = {1999}

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