Hadamard Transform for Speech Wave Analysis
STANFORD UNIV CA DEPT OF COMPUTER SCIENCE
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Two methods of speech wave analysis using the Hadamard transform are discussed. The first method is a direct application of the Hadamard transform for speech waves. The reason this method yields poor results is discussed. The second method is the application of the Hadamard transform to a log-magnitude frequency spectrum. After the application of the Fourier transform the Hadamard transform is applied to detect a pitch period or to get a smoothed spectrum. This method shows some positive aspects of the Hadamard transform for the analysis of a speech wave with regard to the reduction of processing time required for smoothing, but at the cost of precision. A formant tracking program for voiced speech is implemented by using this method and an edge following technique used in scene analysis.
- Voice Communications