ABSTRACT
MPEG-7 allows different granularity in its descriptions, offering the possibility of having different levels of discrimination. Even though the MPEG-7 description does not depend on the (coded) representation of the material, MPEG-7 can exploit the advantages provided by MPEG-4 coded content. For instance, if the material is encoded using MPEG-4, which provides the means to encode AV material as objects having certain relations in time (synchronization) and space (on the screen for video, or in the room for audio), it will be possible to attach descriptions to elements (objects) within the scene, such as audio and visual objects.
