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Results tagged with spectrogram
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user 7390
A spectrogram is a time-varying spectral representation (forming an image) that shows how the spectral density of a signal varies with time.
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Reconstruction of audio signal from Spectrogram
If the spectrogram was computed as the magnitude of short time fourrier transforms from overlapping windows, then the spectrogram contains implicitly some phase information. … The following iterations do the job :
$$x_{n+1} = \text{istft}(S\cdot\exp(i\cdot\text{angle}(\text{stft}(x_n))))$$
$S$ is the spectrogram, $\text{stft}$ is the forward-short time Fourier transform, $ …
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