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Definition of "speech preprocessing" |
the first step in all problems of speech processing. In preprocessing, the objective is to condition the signal so as to come up with more compressed and informative representations. Within portions of about 10 ms (frames), in practice the speech signal turns out to be quasi-stationary. For each frame, all relevant speech preprocessing approaches return a vector of parameters that make it possible to reconstruct the signal. Speech preprocessing is mainly carried out by using frequential approaches (e.g., the short-time Fourier transform) or linear prediction. |
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