Object priority order compositor for MPEG-4 player

摘要

An object priority order compositor for an MPEG-4 player having a drawing node list generator including an object priority order register, a drawing node extractor, a field-node extractor, and an object priority order manager including an object rendering sequencer and an object instruction manager. The drawing node list generator makes a list by receiving a scene tree from a parser manager and extracting drawing nodes necessary for presentation on a screen from the scene tree by a depth first search. The object priority order manager handles insert, delete, and replace commands received from scene constitution information to determine priority order of an object. The object priority order compositor performs presentation of objects based on a priority order for objects when a scene change, in which an object is inserted, deleted, or replaced in real time by user interaction, as required in an MPEG-4 scene of high capacity multimedia objects.