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Speaker normalization processor apparatus for generating frequency warping function, and speech recognition apparatus with said speaker normalization processor apparatus
Speaker normalization processor apparatus for generating frequency warping function, and speech recognition apparatus with said speaker normalization processor apparatus
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机译:用于产生频率扭曲功能的扬声器归一化处理器设备以及具有所述扬声器归一化处理器设备的语音识别设备
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摘要
In a speaker normalization processor apparatus, a vocal-tract configuration estimator estimates feature quantities of a vocal-tract configuration showing an anatomical configuration of a vocal tract of each normalization-target speaker, by looking up to a correspondence between vocal-tract configuration parameters and Formant frequencies previously determined based on a vocal tract model of the standard speaker, based on speech waveform data of each normalization-target speaker. A frequency warping function generator estimates a vocal-tract area function of each normalization-target speaker by changing feature quantities of a vocal-tract configuration of the standard speaker based on the feature quantities of the vocal-tract configuration of each normalization-target speaker estimated by the estimation means and the feature quantities of the vocal-tract configuration of the standard speaker, estimating Formant frequencies of speech uttered by each normalization-target speaker based on the estimated vocal-tract area function of each normalization-target speaker, and generating a frequency warping function showing a correspondence between input speech frequencies and frequencies after frequency warping.
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