MPEG-4 is meant to become the universal language between broadcasting, movie and multimedia applications. It will provide additional functionality over simple media compression, like bitrate scalability, object-based representation.
MPEG-4 does this by providing standardized ways to: (1) represent units of aural, visual or audiovisual content, called "media objects". These media objects can be of natural or synthetic origin; this means they could be recorded with a camera or microphone, or generated with a computer; (2) describe the composition of these objects to create compound media objects that form audiovisual scenes; (3) multiplex and synchronize the data associated with media objects, so that they can be transported over network channels providing a QoS appropriate for the nature of the specific media objects; and (4) interact with the audiovisual scene generated at the receiver´s end.
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