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Results tagged with stft
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user 60904
Short-Time Fourier Transform is an analysis tool that repeatedly applies the Discrete Fourier Transform (DFT or FFT) to short segments of a longer signal, while sliding the window that selects the segment of the longer signal that the STFT operates on. The STFT is a function of two independent variables, frequency in the DFT and the time of the center of the sliding window.
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Shifting frequency peaks such that w[i] moves to w[i/n] using STFT and IFFT
I am trying to do a kind of frequency compression on say 20 most energetic frequencies in a particular slice of a STFT. … If w[i] is the frequency peak for a slice of STFT at a particular time, then I want to move w[i] to w[i/n] where n is arbitrary. …
- 103
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writing from STFT to audio using ISTFT adding harmonics to audio not present before
I do this for every time slice of the STFT and create a new STFT and then I apply ISTFT to get a time domain signal. … I take an inverse of the new STFT labelled as such and clear out the tiny imaginary part by taking the real part and then pass it to STFT again to see what has happened. …
- 103