20111ee114_1_CA3

20111ee114_1_CA3 - UCLA Dept. of Electrical Engineering EE...

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UCLA Dept. of Electrical Engineering EE 114, Winter 2011 Computer Assignment 3: Spectral Analysis of Speech and Linear Predictive Analysis Due: January 26, 2011 Introduction : This assignment studies the use of time-frequency representations, or spectro- grams, during speech processing. Furthermore, the assignment explores the role of linear prediction in spectral analysis of speech. Speciflcally, this assignment focusses on the efiect of prediction order on resulting spectral approximations. Spectrograms : Time-frequency representations of speech are commonly referred to as spectrograms. MATLAB includes the function "specgram," which divides data into a series of overlapping windows, and computes the FFT for each signal segment. In the resulting 2D signal, the vertical axis represents frequency, and the horizontal axis represents time. The log-magnitude of each FFT is mapped to color, with red corresponding to large values and blue corresponding to small values. The variables loaded into your workspace includes "tone," which is a sinusoid of constant frequency. You can listen to "tone" by typing:
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20111ee114_1_CA3 - UCLA Dept. of Electrical Engineering EE...

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