signal-processing Questions
2
I need to perform a convolution using a Gaussian, however the width of the Gaussian needs to change. I'm not doing traditional signal processing but instead I need to take my perfect Probability De...
Swedish asked 4/9, 2013 at 21:21
2
Solved
I converted some audio files to spectrograms and saved them to files using the following code:
import os
from matplotlib import pyplot as plt
import librosa
import librosa.display
import IPython.d...
Huggins asked 10/4, 2020 at 1:4
7
Solved
I have to compare two time-vs-voltage waveforms. Because of the peculiarity of the sources of these waveforms, one of them can be a time shifted version of the other.
How can i find whether there...
Unfavorable asked 14/1, 2011 at 7:6
7
Solved
I am currently working with some Raman Spectra data, and I am trying to correct my data caused by florescence skewing. Take a look at the graph below:
I am pretty close to achieving what I want....
Rorqual asked 19/3, 2015 at 23:0
4
Solved
Let's say I have an array of phases similar to this:
import numpy as np
import matplotlib.pyplot as plt
phase = np.linspace(0., 100., 1000) % np.pi
plt.plot(phase)
plt.show()
(with many disconti...
Isabelisabelita asked 12/9, 2018 at 11:14
41
Solved
I am analyzing the following data:
Raw data (seperated with spaces):
1 1 1.1 1 0.9 1 1 1.1 1 0.9 1 1.1 1 1 0.9 1 1 1.1 1 1 1 1 1.1 0.9 1 1.1 1 1 0.9 1 1.1 1 1 1.1 1 0.8 0.9 1 1.2 0.9 1 1 1.1 1.2 1...
Andreasandree asked 22/3, 2014 at 20:48
6
I have two 2-D arrays with the same first axis dimensions. In python, I would like to convolve the two matrices along the second axis only. I would like to get C below without computing the convolu...
Himes asked 8/3, 2011 at 5:31
4
Solved
I have a main signal, for example sinus with period of 200 samples.
I would like to add a noise to this signal. The periods of "noise signal parts" should be in range for example 5-30 samples.
I...
Overdone asked 26/11, 2015 at 8:35
4
Solved
How do I convert any sound signal to a list phonemes?
I.e the actual methodology and/or code to go from a digital signal to a list of phonemes that the sound recording is made from.
eg:
lPhonem...
Ibsen asked 8/6, 2015 at 9:2
4
Solved
Dear experts i have a data set.i just want to calculate signal to noise ratio of the data. data is loaded here https://i.fluffy.cc/jwg9d7nRNDFqdzvg1Qthc0J7CNtKd5CV.html
my code is given below:
impo...
Sync asked 30/7, 2020 at 16:15
1
Since patents expired in 2017, I wonder if there are specifications of the MP3 audio format that have been made available to the public?
Unfortunately, access to the official ISO/IEC 13818-3:1998 ...
Lewandowski asked 15/5, 2020 at 22:7
0
I have a RTL-SDR and want to count the numbers of beeps per minute for a wildlife tracker around 150Mhz. There is no information encoded/modulated in the beeps - it all comes down to beeps per minu...
Askja asked 16/11, 2023 at 5:34
1
Solved
Why does the hamming function in R give different values to the function of the same name in Matlab?
Matlab:
hamming(76)
0.0800
0.0816
0.0864
0.0945
0.1056
0.1198
R:
library(gsignal)
hammin...
Overprint asked 12/10, 2023 at 12:34
2
Solved
is there any prepared function in python to apply a filter (for example Butterworth filter) to a given signal?
I looking for such a function in 'scipy.signal' but I haven't find any useful function...
Rimini asked 6/12, 2012 at 9:16
2
Solved
I am trying to perform a FFT on a song (audio file in wav format, about 3 minutes long) which I created as follows, just in case it is relevant.
ffmpeg -i "$1" -vn -ab 128k -ar 44100 -y -ac 1 "${1...
Rani asked 26/12, 2017 at 19:15
8
Solved
I am developing software that depends on musical chords detection. I know some algorithms for pitch detection, with techniques based on cepstral analysis or autocorrelation, but they are mainly foc...
North asked 2/12, 2010 at 16:45
4
TL;DR : Is there a C++ implementation of RANSAC or other robust correspondence algorithms that is freely usable with arbitrary 2D point sets?
I know that many implementations exist that include or...
Woebegone asked 21/4, 2015 at 15:53
3
I am struggling to find the proper algorithms for generating the coefficients for low pass filters. I wrote the following taking the butterworthLowPass code from another SO question:
class Filter {...
Placentation asked 7/5, 2023 at 10:4
19
Solved
What is the best (cleanest, most efficient) way to write saturating addition in C?
The function or macro should add two unsigned inputs (need both 16- and 32-bit versions) and return all-bits-one ...
Trubow asked 23/9, 2008 at 14:12
2
I am currently trying to move from Matlab to Python and succeeded in several aspects. However, one function in Matlab's Signal Processing Toolbox that I use quite regularly is the impinvar function...
Trophozoite asked 14/2, 2013 at 7:45
11
Solved
Is there any general-purpose form of short-time Fourier transform with corresponding inverse transform built into SciPy or NumPy or whatever?
There's the pyplot specgram function in matplotlib, wh...
Hennahane asked 17/3, 2010 at 1:12
3
Solved
I posted this question on dsp.stackexchange, and was informed that it was more relevant for stackoverflow as it is primarily a programming question:
I am attempting to write a code which allows me...
Okra asked 21/9, 2014 at 20:35
4
Solved
I'm trying to implement a Fast Fourier Transform (Radix-2) in MS's Excel VBA. The code I'm using pulls data from a range in the worksheet, does the calculations, then dumps the results in the adjac...
Memoried asked 11/4, 2016 at 14:55
8
Solved
All the FFT implementations we have come across result in complex values (with real and imaginary parts), even if the input to the algorithm was a discrete set of real numbers (integers).
Is it no...
Gherardo asked 24/4, 2012 at 19:15
4
I have two signals which are related to each other and have been captured by two different measurement devices simultaneously.
Since the two measurements are not time synchronized there is a small ...
Bed asked 5/1, 2017 at 19:13
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