是ITU向全世界电信部门推荐的标准，但其复杂度较高，实时实现存在较大的困难。

It is recommended to the telecom department all over the world by the ITU, but it is difficult to realize in real time because of the high algorithmic complexity.

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国际电信联盟（ITU）的三个主要机构之一。它主要从事于远距离无线电通信的审批与推荐标准。

One of three main institution of the International Telecom munication Union ( ITU ). It mainly works at the examination and approval of remote radio communication and the recommendation of standards.

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