Top new questions this week:
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I’m reading the original paper on PSOLA (Pitch-Synchronous Overlap-Add), and am struggling with equation (2), in which the authors analysed the effect of a simple pitch-and-time-scale modification on …
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Given a continuous-time filter with impulse response $h(t)$, is it possible to represent any $h(t)$ in state-space form? More precisely, given the state-space representation of a single-input single-…
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I am a statistician by training, and I am very new to signal processing, but I would appreciate some help and patience! Suppose I have a digitized signal measured at a given frequency, range, …
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I have been trying to understand certain aspects of FIR filter design which have frankly annoyed me for some time such as exactly why the critical frequency $\omega_c$ in a low-pass FIR filter is …
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I have an acceleration signal sample and I need to get velocity and movement spectrum (amplitudes and phases) from it. I try to solve this problem in two ways: First method Get FFT of acceleration …
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I’m relatively new to DSP so excuse my ignorance but I was hoping to have an audio related question I had answered. If we’re able to decompose audio into frequencies (e.g. mel spectogram) why is there …
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The np.fft.rfft2 function exploits the Hermitian symmetry of the transform of a real input to more efficiently calculate the transform by omitting the negative …
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Greatest hits from previous weeks:
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Here is a square-wave presented by Fourier series perspective: Above coefficients shows that a square-wave is composed of only its odd harmonics. But here below a square-wave is presented by …
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If I have a signal that is time limited, say a sinusoid that only lasts for $T$ seconds, and I take the FFT of that signal, I see the frequency response. In the example this would be a spike at the …
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What is the difference between feature detectors and feature descriptors? Which among these are detectors and which are descriptors: Harris, SURF, Min Eigen, FAST, SIFT, BRISK
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If you do an FFT plot of a simple signal, like: t = 0:0.01:1 ; N = max(size(t)); x = 1 + sin( 2*pi*t ) ; y = abs( fft( x ) ) ; stem( N*t, y ) 1Hz sinusoid + DC …
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When did we decide to sample telephone at $8$ kHz? Has this always been the case? Why did we do that? Is it because higher bit rates can’t be transferred as quick? And do these reasons still count? …
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I am quite new to Java and Signal Processing, but I was assigned a project dealing in audio processing. My topic given to me is a game that has a component of analyzing a song (any given song) and …
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In MATLAB I have to pass cut-off frequency for designing a filter. But this Cut-off frequency is in radians-per-sample. How do I convert my analog Cut off frequency in $\textrm{Hz}$, into the required …
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Can you answer these questions?
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I am working with a PDM digital microphone and I’ve sampled the data using a FPGA. For the beginning I am working in python to do all the algorithm, then I will implement it in FPGA. I am using two …
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I am enjoying reading (a used copy of) Statistical Digital Signal Processing and Modeling by Monson Hayes. A considerable chunk of the fourth chapter is devoted to deterministic all-pole modeling. I …
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I am looking for methodology on how to correct data for losses present in RF signal paths. The basis for my objective is to convert an discreet time domain signal into the frequency domain with an FFT,…
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