| 摘要 |
A feature extracting apparatus includes a spectrum calculator that calculates a logarithmic frequency spectrum including frequency components obtained from an input speech signal at regular intervals on a logarithmic frequency scale of a frame; a function calculator that calculates a cross-correlation function between a logarithmic frequency spectrum of a time and a logarithmic frequency spectrum of one or plural times included in a certain temporal width before and after the time, from a sequence of the logarithmic frequency spectra calculated at each time; and a feature extractor that extracts a set of the cross-correlation functions as a local and relative fundamental-frequency pattern feature at the frame.
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