| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve estimation of filter characteristics in a fundamental frequency generation system of a singer in chorus. <P>SOLUTION: A fundamental frequency model parameter estimation device comprises: a fundamental frequency extraction part 2 for extracting fundamental frequency time sequences F<SB POS="POST">0</SB>(t), V(t), and U(t) with respect to a singing-voice acoustic signal of a singer, each singing-voice acoustic signal of other singers in chorus, and a target pitch value time series that are input; a numerical differential calculation part 3 for calculating both a first-order differential time sequence and a second-order differential time sequence of the fundamental frequency time sequence F<SB POS="POST">0</SB>(t) of the singer respectively; and a filter characteristics parameter estimation part 4 for using a second order linear differential equation, which is obtained by modelling the entrainment of the fundamental frequency time sequence F<SB POS="POST">0</SB>(t) of the singer to the fundamental frequency time sequence V(t) of other singers, to estimate a parameter of the second order linear differential equation as a filter characteristics parameter of a fundamental frequency generation system. <P>COPYRIGHT: (C)2012,JPO&INPIT |
