Object priority order compositor for MPEG-4 player

Abstract

The present invention relates to an object priority order compositor for an MPEG-4 player comprising a drawing node list generator including an object priority order register, a drawing node extractor, and a field-node extractor; and an object priority order manager including an object rendering sequencer and an object instruction manager. An object priority order compositor for an MPEG-4 player according to the present invention comprises a drawing node list generator for making a list through receiving a scene tree from a parser manager and extracting drawing nodes necessary for presentation on a screen from the scene tree by means of depth first search; and an object priority order manager for handling insert, delete, and replace commands received from scene constitution information and determining priority order of an object. In an MPEG-4 audiovisual scene consisting of high capacity multimedia objects, when a scene change, which an object is inserted, deleted, or replaced in real time by user interaction, is required, the object priority order compositor for an MPEG-4 player according to the present invention performs presentation of objects based on priority order of objects. The compositor searches priority order of objects, and makes it possible to arbitrarily change order of objects and further to perform presentation of only objects requiring reconstruction. Thus, the object priority order compositor provides re-usability and availability of multimedia data. Further, the object priority order compositor renders efficient multimedia data processing possible by providing a user with a dynamic scene.

Dependencies are inferred from the claim text.