# Tag Info

Accepted

### Am I supposed to normalize FFT in Python?

Your decision to normalize or not does not change the accuracy of your answer, as it is simply a scaling factor. If you use the common scaling of $1/N$, then the output for each DFT bin will represent ...
• 52.9k
Accepted

### Is it possible to normalize FIR filter coefficients to "perserve gain on average"?

I'm wondering if there is a standard way to normalize its filter coefficient in a way to make the filter "energy preserving on average". If the filter isn't all-pass, then there wouldn't be ...
• 12.9k
Accepted

### How to choose the "best" measurment (from a given set) as input for a kalman filter?

Question: Which parameter is suitable to indicate how "good" the measurement fits to the Kalman filter? To estimate a quality of association you can use likelihood function. The likelihood ...
• 388
Accepted

### Overlap/add time-domain audio frames: How does normalization/scaling work with overlap greater than 50%?

Let's assume continuous time (rather than discrete time). If you do not process the windowed data at all, you would like the output (the sum of the windowed frames) to be equal to the original signal....
• 13.6k
Accepted

### What is the relationship between angular frequency and normalized angular frequency

Again there is no wrong or right here. In the Alan Oppenheim's Discrete-Time Signal Processing book, the notation is as follows: when there are only continuous-time signals we use $\omega$ for ...
• 28.3k
Accepted

### How do I normalize a predesigned IIR filter?

As mentioned in the comments, you have to choose a frequency $\omega_0$ at which you want to normalize the gain. This could be DC (i.e., $\omega_0=0$) or any other frequency, depending on the filter's ...
• 90.6k
Accepted

### Design a filter which passes all frequencies except $\omega=\pm\frac{\pi}{2}$ and plot its pole-zero diagram

The kind of filter you are looking for is a notch filter. Using filter design toolbox in Matlab you can get it as I'm showing you in the following picture: This has to be done in z-plane so there ...
• 1,142
Accepted

### Signal normalization

[EDIT] After a second read, the proposed normalization looks non standard. Suppose that $m\le x \le M$ ($m$ and $M$ denote the min and max). The scaling factor will be, depending on the situation: if ...
• 32.1k

### Dynamic range compression - Need pseudo algorithm for normalizing a signal

from your posted waveform, i am assuming that this is a unipolar signal. that is $$x[n] \ge 0$$ in audio, it would be the same, except that we would be working on $|x[n]|$ instead. so first you ...
Accepted

### How to normalize the FFT?

It's not clear how you are wanting to normalize the function. If you are wanting to normalize the spectrum so that the amplitude of the function in the time domain matches the amplitude of the ...
• 1,135
Accepted

### Obtaining normalized matrix for the Haar Wavelet Transform

After a few quick calculations, it seems to me that the trouble comes from poor notations for the root in your reference. If you read, in the final normalized matrix, $\sqrt{8/64}$ and $\sqrt{2/4}$ ...
• 32.1k

### Dynamic range compression - Need pseudo algorithm for normalizing a signal

here's an efficient sliding maximum algorithm that has cost that is $O(\log_2(L))$. below window_width is $L$. comes from Brookes: "Algorithms for Max and Min ...
Accepted

### normalized sum of squared differences

In an attempt to solve the question on why to normalize, and implicitly how to normalize: $F$ is your reference patch, $I$ is the patch under inspection. So make $I$ only consist of the maximum ...
• 31.7k

### Factor $|a|^{-1/2}$ in definition of mother wavelets

Wavelets play differents role in functional spaces, especially as unconditional bases (see What are unconditional bases and which wavelets have this property?). In $L_p$ spaces, if $|\psi|^p$ is ...
• 32.1k

• 13.6k
1 vote

### Normalization of a signal with respect to another signal

I think I understand what Vasilis is after with this question, so I will attempt to clarify for all, and answer. Let x(0...N-1) be a predetermined reference signal. Let y(0...N-1) be another signal. ...
• 11
1 vote

### Making audio clips comparable in terms of RMS

I wrote this simple Matlab function a while back, it operates on dBFS: ...
• 139
1 vote
Accepted

### Normalizing audio waveforms code implementation (Peak, RMS)

What is the best method to solve this? Intuitively, it seems I might need to calculate a local max or average based on a moving window (rather than the entire set) but I'm not entirely sure. Help? ...
• 10.7k

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