MPEG－4中采用了物件的观念，压缩前先将影片中各主要物件区分开来。例如在播报电视新闻的场景中，播音员是一个物件，播报台、背后的布景、播音员旁边的3d玩偶也分别是一个物件，播音员的声音也是一个物件。在影片进行中，播音员会有轻微的移动，播报台是固定不动的，而布景则 MPEG-4 uses the concept of objects, the first compression before the major objects in the movie to distinguish. For example, in the scene of television news broadcast, the announcer is an object. The broadcast station, the background behind the announcer, the 3d doll next to the announcer are also an object, and the announcer’s voice is also an object. In the film, the announcer will have a slight movement, the broadcast station is stationary, while the scenery is