DSP  Task2  Basic Overview on DFT Properties

DFT  shorttime DFT, spectral leackage
 Generate sinus signal with parameters: f=50Hz, fs=200Hz, duration 1s .
 Evaluate shorttime DFT over this signal  ONE SPECTRAL LINE (function fft)  describe correctly axis (frequency)
 Evaluate shorttime DFT over the sequence with length wlen=190 vzorkù. Explain results.
 Evaluate shorttime DFT over the sequence with length wlen=190 vzorkù with application of weighting window (Hamming).
 Properties of shortime DFT
 Periodicity in DFT
 Evaluate spectrum (shorttime DFT) of one period of voiced vowel in speech signal vm0per.bin
 Observe, how the spectrum is changed in the case of adding zeros to the sequence.
 Observe, how the spectrum is changed in the case of the repetition of this period 2x, 3x, 4x.
 Observe, how the spectrum is changed in the case of 4times repetition of the period and for the window length 480, 479, 470, 460, 450.
 Observe the periodicity in real signal (real part of voiced vowel) vm0.bin, use window length approx. 200  500.
 Estimate the basic period for signals vf5.bin a vm5.bin
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This page was created Thu Oct 26 09:56:01 CEST 2000