Dole
  • Member for 6 years, 6 months
  • Last seen more than 2 years ago
Where does the delta function come from if we derive autocorrelation directly?
1 votes

The definition of variance of a random variable: $$Var(X)=E[(X-E(X))^2]$$ Since the variable was defined to have mean zero: $$E(X)=0$$ Inputting that into the formula, you get: $$E(X^2)$$ The ...

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Frequency response of a rolling linear regression
1 votes

This is a statistics question and should not be asked here. But I will try to answer the question as best as I can (it won't be the best answer). First off, I don't see what the phenomenon you are ...

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Formulas of the Fourier transform family
1 votes

$$\large \text{FOURIER TRANSFORMS}$$ Fourier series $X[k]$: $$\large X[k] = \int_{0}^{T}x(t)e^{\huge \frac{-j2\pi kt}{T}}dt$$ $T$ = Length of the window or fundamental oscillation, $\large \frac{1}{T}...

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Need intuition on the frequency response of a signal
1 votes

Frequency response is the Fourier transform (or DFT in discrete case) of the impulse response. I think you may be confusing frequency response with frequency domain representation of a signal. ...

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DFT/FFT Transfer function
Accepted answer
1 votes

Your question is fairly broad, let me answer it step by step. First of all $H(s)$ is indeed called the transfer function, and is the laplace transform of the impulse response. It's useful for ...

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What's the best method to extract vocals from music?
1 votes

The example sounds like pitch tracking combined with comb filtering. Using method like this could be implemented by "drawing" as well, as in SPEAR analysis and re-synthesis program. If the vocal is ...

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Calculation of cosine in frequency domain instead of calculatin in time-domain followed by a FFT
0 votes

If I understand the question correctly, this result may be of help. Keeping in mind that amplitude modulation is convolution in frequency domain. All you need to do then is convolve the unit impulse ...

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how can i center an audio signal?
0 votes

Remove DC offset. Either convert to frequency domain and remove bin 0 or just use a very low frequency high pass filter.

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how to extract telephone audio only from an mp3
0 votes

Here is a way to do this: First analyze the audio, hone in on the frequencies that are prelevant in one of the signals, but not the other. Use a steep FIR filter to isolate roughly those frequencies. ...

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