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【简答题】
一音乐信号m(t)的最高频率分量为20kHz，以奈氏速率取样后进行A律13折线PCM。编码，所得比特率为320kbps，若以第一类部分响应系统传输此PCM信号，则系统的截止频率为____________kHz，系统的频带利用率为_______________。
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举一反三
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