Top "Signal-processing" questions

AKA digital signal processing (DSP).

How to smooth a curve in the right way?

Lets assume we have a dataset which might be given approximately by import numpy as np x = np.linspace(0,2*np.…

python numpy scipy signal-processing smoothing
Peak signal detection in realtime timeseries data

Update: The best performing algorithm so far is this one. This question explores robust algorithms for detecting sudden peaks in …

algorithm language-agnostic time-series signal-processing data-analysis
Creating lowpass filter in SciPy - understanding methods and units

I am trying to filter a noisy heart rate signal with python. Because heart rates should never be above about 220 …

python scipy filtering signal-processing
How do I obtain the frequencies of each value in an FFT?

I have an FFT result. These are stored in two double arrays: a real part array and an imaginary part …

c# signal-processing fft
How to apply a low-pass or high-pass filter to an array in Matlab?

Is there an easy way to apply a low-pass or high-pass filter to an array in MATLAB? I'm a bit …

matlab filter signal-processing
How to implement band-pass Butterworth filter with Scipy.signal.butter

UPDATE: I found a Scipy Recipe based in this question! So, for anyone interested, go straight to: Contents » Signal processing » …

python scipy signal-processing digital-filter
Plotting power spectrum in python

I have an array with 301 values, which were gathered from a movie clip with 301 frames. This means 1 value from 1 frame. …

python numpy scipy signal-processing
An implementation of the fast Fourier transform (FFT) in C#

Where can I find a free, very quick, and reliable implementation of FFT in C#? That can be used in …

c# signal-processing fft
How to normalize a signal to zero mean and unit variance?

I am new to MATLAB and I am trying to built a voice morphing system using MATLAB. So I would …

matlab signal-processing
How to detect the BPM of a song in php

How can the tempo/BPM of a song be determined programmatically? What algorithms are commonly used, and what considerations must …

algorithm audio signal-processing beat-detection