【国外标准】 Information technology - Coding of audio-visual objects - Part 1: Systems AMENDMENT 1: Extended BIFS

Specifies system level functionalities for the communication of interactive audio-visual scenes. More specifically: 1.) system level description of the coded representation of natural or synthetic, two-dimensional (2D) or three-dimensional (3D) objects that can be manifested audibly and/or visually (audio-visual objects);2.) the coded representation of the spatio-temporal positioning of audio-visual objects as well as their behavior in response to interaction (scene description); and 3.) the coded representation of information related to the management of data streams (synchronization, identification, description and association of stream content).This part of ISO/IEC 14496 specifies system level functionalities for the communication of interactive audio-visual scenes. More specifically: 1. system level description of the coded representation of natural or synthetic, two-dimensional (2D) or three-dimensional (3D) objects that can be manifested audibly and/or visually (audio-visual objects); 2. the coded representation of the spatio-temporal positioning of audio-visual objects as well as their behavior in response to interaction (scene description); and 3. the coded representation of information related to the management of data streams (synchronization, identification, description and association of stream content). 4. a system level description of an application engine (format, delivery, lifecycle, and behavior of downloadable Java byte code applications); and 5. a system level interchange and storage format of interactive audio-visual scenes.