Wolfram 语言

计算音频

有声和无声检测对比

检测无声部分并将其衰减.

In[1]:=
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a = ExampleData[{"Audio", "NoisyTalk"}, "Audio"]
Out[1]=

使用 AudioIntervals 查找低 RMS 振幅和高频谱平坦度的部分.

In[2]:=
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nonVoicedIntervals = AudioIntervals[ a, #RMSAmplitude < .02 && #SpectralFlatness > .0001 &, .1, PartitionGranularity -> {.06, .01}]
Out[2]=

可视化检测到的区间.

In[3]:=
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AudioPlot[a, Epilog -> {RGBColor[1, 0, 0, .3], Rectangle[{#[[1]], -1}, {#[[2]], 1}] & /@ nonVoicedIntervals}, ImageSize -> Medium]
Out[3]=

衰减检测到的区间.

In[4]:=
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AudioJoin[ Riffle[AudioFade /@ AudioTrim[a, Except@nonVoicedIntervals], 0.3*AudioTrim[a, nonVoicedIntervals]]]
Out[4]=

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