（ ）标准的目标是制定一个开放的多媒体应用框架标准。
- A.H.264
- B.MPEG-21
- C.XML
- D.X3D
正确答案及解析
正确答案
解析
本题考查考生对各种多媒体相关的国际标准的了解情况。H.264是国际电信联盟（ITU）制定的视频信号和音频信号的压缩编码标准：X3D是由Web3D联盟专为Internet应用设计的三维图形标记语言，是VRML标准的升级版本；MPEG-21是ISO/IEC制定为一个标准，致力于定义多媒体应用的一个开放框架。
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