to recognize data loss. It also enables interleaving of data from different elementary streams into FlexMux streams. Moreover, it permits the conveyance of control information to indicate the required QoS for each elementary stream and FlexMux stream, translation of such QoS requirements into actual network resources, association of elementary streams to media objects, and conveyance of the mapping of elementary streams to FlexMux and TransMux channels. Systems MPEG-4 supports scene description for composition (spatio-temporal synchronization with time response behavior) of multiple media objects. The scene description provides a rich set of nodes for two-dimensional and three-dimensional composition operators and graphics primitives. It also supports text with international language support, font and font style selection, timing and synchronization. Moreover, MPEG-4 supports interactivity such as client and server- based interaction, an event model for triggering events or routing user actions, and event management and routing between objects in the scene, because of user or scene triggered events. The FlexMux tool provides interleaving of multiple streams into a single stream, including timing information, and the TransMux provides transport layer independence through mappings to relevant transport protocol stacks. MPEG-4 also MPEG Family of Specifications provides the initialization and continuous management of the receiving terminal's timing identification, synchronization and recovery mechanisms, as well as other receiving terminal buffers. It also recognizes data sets such as the identification of Intellectual Property Rights that relate to media objects. Audio MPEG-4 Audio permits a wide variety of applications that could range from simple speech to sophisticated multi-channel audio, and from natural sounds to synthesized sounds. In particular, it supports the highly efficient representation of audio objects consisting of: Speech signals: Speech coding can be done at bitrates from 2 Kbps up to 24 Kbps usin