Speech signal short time analysis
2016-08-23
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The speech signal is time-varying. The change of single parameter signal is slower than the signal itself. Therefore, for the measurement of such parameters, a significantly lower frequency is necessary ↗ Sampling ratio ↗ The necessary condition of sampling frequency. With the help of the window function, the weighted signal is measured in time domain and divided into local signal sequences. As for the exact target of measurement, two dimensions of "short time analysis" must be determined: window length (weighted part signal length) and measurement interval (frame rate, that is, the distance between windows).
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