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lab_7

于 2007-12-26 发布 文件大小:11KB
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代码说明:

  双音多频编解码系统,用于产生双音多频信号,并由双音多频信号解码出对应的按键(DTMF codec systems, used to generate DTMF signal by the DTMF signal decoding keys corresponding)

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