Methods and apparatus for integrating external applications into an MPEG-4 scene

摘要

A method of decoding, composing and rendering a scene. First information is obtained, the first information including a part of a MPEG-4 BIFS scene description stream and at least one coded MPEG-4 media stream. The first information is decoded by invoking a BIFS scene decoder and one or more specific media decoders that are required by the scene. Second information is obtained, the second information including a second part of a BIFS scene description stream that contains a reference to an external application. The second information is decoded by invoking the BIFS scene decoder and an external application decoder. An integrated scene is composed, the integrated scene including one or more decoded MPEG-4 media objects and one or more external application objects specified in the decoded scene descriptions streams. The composed integrated scene is rendered on a display.

主权项

1. A method comprising:
decoding, via a binary format scene decoder, a part of a binary format scene description stream that references a non-MPEG external application object and a pointer to a set of non-MPEG computer-executable instructions associated with the non-MPEG external application object to yield decoded data, wherein the non-MPEG external application object is configured to control and render a windowed region within a coded scene according to the set of non-MPEG computer-executable instructions; and composing, based on the decoded data, an integrated scene comprising the non-MPEG external application object.