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Speaker feature estimation method and speaker features estimating device, cluster model creating apparatus, voice recognition device, a speech synthesizer, as well as program recording medium
Speaker feature estimation method and speaker features estimating device, cluster model creating apparatus, voice recognition device, a speech synthesizer, as well as program recording medium
PROBLEM TO BE SOLVED: To eliminate the fluctuation in a speech vector high-frequency band by individual differences, etc., of piriform fossa shapes. SOLUTION: A characteristic quantity mapping section 1 and a function estimation section 3 selects one mapping function by the likelihood estimation based on equation (1) using plural mapping functions and outputs this function as a speaker characteristic. At this time, a characteristic quantity conversion section 4 converts the speaker characteristic quantities of the input speakers respectively mapped by each of the plural mapping functions by the characteristic quantity mapping section 1 by the speaker characteristic quantities extracted from a standard speaker model stored in a standard speaker model storage section 2 in the speech spectral high-frequency band fluctuated by the individual differences, etc., of the piriform fossa shapes in the vocal tracts and inputs the extracted speaker characteristic quantities to the function estimation section 3. The mapping functions as the speaker characteristics are estimated with good accuracy by removing the influence of the fluctuation in the speech spectra high-frequency band by the individual differences, etc., of the piriform fossa shapes in the vocal tracts.
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