Speech Signal Processing Assignment 2 ECE448 solution

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1. Record your name and the utterance should be ”I am ”. Note: Computer Based Question (a) Create a time-domain plot and mark voice and unvoiced regions. (1.5 pts) (b) Select a segment from a wave file and identify whether the selected region is voiced or unvoiced. i. Zero crossing (1 pts) ii. Energy (1 pts) iii. Autocorrelation (1 pts) Comment on each (1.5 pts) 2. What are epochs in speech production? Why are they significant in speech signal processing? Illustrate with an example. (4 pts) 3. Load the files H MKB.wav into MATLAB/Python using the function wavread/audioread. Audio file is shared along with the assignment. Note: Computer Based Question (a) Create a time-domain plot with voiced and unvoiced regions marked (1.5 pts) (b) In the time-domain plot, mark the regions where the pitch is the highest and the lowest. What are the pitch frequencies in those regions? (1.5 pts) (c) What is the fundamental frequency (pitch) in your particular case? (1 pts) (d) Identify a voiced regions and unvoiced regions in a signal and for one particular frame, compute of frame energy and comment of it. (2 pts) (e) Implement zero-crossings and comment of it.(2 pts) (f) Autocorrelation and comment of it.(2 pts)