Lecture 14 Flashcards
How is voiced speech produced? What are the components?
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What is perceived as pitch?
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What are the difficulties with pitch determination?
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What are the two main methods of determining the pitch?
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What is the time domain method?
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How does the speech signal look like? What do we want to work out?
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What is autocorrelation? What does it describe? What is the graph of the initial signal?
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What does the autocorrelation graph look like?
a. What happens to the autocorrelation when shift the signal by half a period?
What if shift by whole period?
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When is an autocorrelation of 0 expected?
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What time point if the fundamental period?
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What is the discrete equation? What is the no. of data points?
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What does the shifting the index, shift the signal by?
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What is the distance function?
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What is the AMDF stand for? What is it? Plot it?
a. What is the delay for 0?
b. What is when half of fundamental period?
What is when fundamental period?
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What value if the AMDF always?
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What are the problems in the time domain?
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Why is there a strong first formant? Graphs?
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What happens if the f0 is missing?
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What method is therefore used to avoid this?
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What is the frequency domain method? What is the main idea?
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What is the 2nd Fourier transform called?
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What is the Cepstrum? What is it defined as?
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What is the inverse FT operate on?
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How does the power Cepstrum look like schematically? Graph?
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