Having the conception of the video object, MPEG-4 has a high guarantee of compression and co - ( ding ) based on video contents. Every format and bit rate of video source can be highly coded to satisfy multimedia application demand in lots of fields. MPEG-4引入了视频对象的概念,有效地支持基于内容的图像编码,对不同的视频源标准格式和不同的视频码率提供有效的编码,以满足众多多媒体的应用需求。