从幅度和比特率计算频率 [英] Calculating frequency from amplitude and bitrate
问题描述
我现在有一个数组全面数据，这些数据从我相信这是我的wave文件的幅度。这是目前在低-32768，并在一个较高的32767。
I currently have an array full of data which from what I believe is the Amplitude of my wave file. It is currently at a low -32768 and at a high 32767.
我也有采样率这是16,000hz。
I also have the SampleRate which was 16,000hz.
我的声音的理解不是很好;从这个没有人知道我是如何计算的频率？
My understanding of sound isn't very good; does anyone know from this how I can calculate the Frequency?
帮助很大AP preciated，
Help greatly appreciated,
Monkeyguy。
Monkeyguy.
推荐答案
它到底是什么，你想要做什么？该方法将完全取决于你希望什么来实现的。你有包含单个正弦波，例如，一个探测器由一块机械设备的信号？或者更可能的是，你想要玩/唱成麦克风和录制音乐？
What exactly is it that you're wanting to do? The method will depend entirely on what you're hoping to achieve. Do you have a signal that contains a single sinusoid, eg a detector from a piece of mechanical equipment? Or more likely, are you wanting to play/sing into a microphone and transcribe the music?
在这两种情况下，FFT就会调用你的第一个端口。在第一种情况下，这可能是pretty的多你所需要的，因为FFT的是良好的隔离稳态正弦波。在后一种情况下，你才能得到任何有用的结果都得到了一个很长的路要走你。音高的识别是一个棘手的问题，而只是抛出一些的FFT不会让你很远。你需要有一个良好的接地在数字信号处理和音乐信号也的特点，然后可能是你最好的选择是使用自相关基础的方法来代替。
In both cases, the FFT will be your first port of call. In the first case this may be pretty much all you need, as FFTs are good for isolated steady-state sinusoids. In the latter case, you have got a very long road ahead of you in order to get any useful results at all. Pitch recognition is a difficult problem, and merely throwing some FFTs won't get you very far. You'll need to have a good grounding in digital signal processing and also the characteristics of musical signals, and then probably your best bet is to use an autocorrelation based method instead.
请参阅对一些链接，它们很有用相关的主题我的previous答案：<一href="http://stackoverflow.com/questions/3141927/algorithms-for-determining-the-key-of-an-audio-sample/3142776#3142776">http://stackoverflow.com/questions/3141927/algorithms-for-determining-the-key-of-an-audio-sample/3142776#3142776
See my previous answer on a related subject for some links which may be useful: http://stackoverflow.com/questions/3141927/algorithms-for-determining-the-key-of-an-audio-sample/3142776#3142776
这篇关于从幅度和比特率计算频率的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
