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如何从WAV抽样数据中提取频率?
原标题:How to extract frequency out of WAV sample data?
  • 时间:2011-11-16 15:24:41
  •  标签:
  • c
  • wav
  • pcm
  • riff

I m 编制C申请,读作简单的PCMWAV文档。 我的问题是,我如何解释数据库中的样本,以便我能够提取样本的频率?

西非统计网的一个实例是,原始数据如何代表频率。 例如,这一数据库,24 17 1e f3, 用于肿瘤,16个轨道,左渠道样本为0x1724 = 5924d, 即5924Hz? 对于人类能够听到的经签字或频率的样本,如何做到这一点?

最佳回答

Your assumption is incorrect. The sample data is simply a digital representation of the actual sound wave. The numbers represent wave amplitude, the array offset represents time.

I would suggest reading about How Audio is Represented, specifically PCM.

为了将这一数据(全时)转换成频率数据,你需要了解。 The Fourier Change

I really suggest taking the time to read these before trying to do any audio processing.

问题回答

您可以提取西维协会负责人的样本率,但如果您需要所记录的录音的实际频率数据,即200赫兹的能量,2千米的能量。 Hz,8k Hz, 等,你们需要做公平交易,或用图表管理。





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