What functionality does MPEG-4 Systems provide?
Much of the functionality that MPEG-4 provides comes from the Systems part. As Systems takes care of (among other issues) streams management and scene description, it acts as a wrapper to the source coding technology. Systems supports the following basic functions described below: • Version 1: • A stream management framework encompassing a terminal model for time and buffer management, a coded representation of metadata for the description, identification and logical dependencies of the elementary streams (Object descriptors and other Descriptors), a coded representation of descriptive audio-visual content information (object content information OCI), a coded representation of synchronization information (sync layer SL), a multiplexed representation of individual elementary streams in a single stream (FlexMux); • a coded representation of interactive audio-visual scene description information (Binary Format for Scenes BIFS) for presentation purpose. BIFS includes spatio-temporal positi
