04882758 is referenced by 21 patents and cites 4 patents.

A high speed method for formant extraction includes the steps of calculating linear prediction coefficients by executing linear prediction analysis of an input speech signal, extracting a coarse formant frequency by making a linear combination of multiple regression coefficients obtained through multiple regression analysis executed with speech feature parameters taken as predictor variables and with formant frequencies taken as criterion variables and speech feature parameters, and solving a root of an inverse filter formed of the linear prediction coefficients by an approximation method in which the coarse formant frequency is set up as an initial value of the root of the inverse filter and an approximation of root is recursively calculated until it converges to the root.

Title
Method for extracting formant frequencies
Application Number
7/111346
Publication Number
4882758
Application Date
October 22, 1987
Publication Date
November 21, 1989
Inventor
Michiyo Goto
Osaka
JP
Shuji Takata
Kadoma
JP
Yutaka Uekawa
Ashiya
JP
Agent
Wenderoth Lind & Ponack
Assignee
Matsushita Electric Industrial
JP
IPC
G10L 9/04
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