Computer Science and Engineering Speech Signal Processing Experiments

Short-Time Spectrum Analysis of Speech

  1. What is the need for windowing of the signal?

  2. Why rectangular window is not suitable for short-time DFT spectral analysis?

  3. Explain the influence of the number of DFT points on the DFT spectrum.

  4. What is the effect of the window size on the DFT spectrum?

  5. What is the significance of short-time spectral envelope representation of speech?

  6. What features of the speech production system can be observed at different window size?

  7. What are the source features that can be observed in the short-time DFT spectrum?

  8. What vocal tract system characteristics are observed in the short-time DFT spectrum?

  9. Why is it difficult to analyze the vocal tract system characteristics from a short-time DFT spectrum?