MPEG-4 overview
Goals
extend the definition of media objects
describe the composition of these objects into a scene
multiplex and synchronize the object data
interact with the user

Standards
MPEG-4 systems (ISO/IEC 14496-1)
MPEG-4 video (ISO/IEC 14496-2)
MPEG-4 audio (ISO/IEC 14496-3)
DMIF (ISO/IEC 14496-6)