Chapter 4. BIFS: Scene Description

by Jean-Claude Dufourd

Keywords: hierarchical scene description, VRML, binary encoding, scene examples, node reference

The biggest difference in MPEG-4, with respect to MPEG-2 and MPEG-1, is the notion of object. An MPEG-2 program typically is constituted of two MPEG-4 objects: one full-screen video object, and one audio object. MPEG-4 content, on the other hand, may be built with any number of audiovisual objects (subject to the constraints imposed by the profile@level definitions, see Chapter 13). Each object can be of any of a large number of object types, such as rectangular video, natural audio, video with shape, synthetic face or body, generic 3D objects, speech, music, synthetic audio, text, or graphics. ...

Get MPEG-4 Book, The now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.