自然性の極めて高い音声分析変換合成法(<特集>音声研究の新しい手法)

抄録

A very high-quality speech analysis-modification-synthesis method is introduced as a versatile tool for speechand auditory perception research. The proposed method is based on a simple and appealingconcept of the channel VOCODER which was proposed 60 years ago. Interference due to the signal periodicity is carefully removedfrom the extracted spectral envelope using a pitch adaptivespline smoothing method. This virtually perfect removal of periodicity interference enablesflexible manipulations of speech parameters in a fairly wide range. Examples illustrate how the proposed method works andwhere it is applicable to promote perception research.