Method for extracting formant frequencies

Details Method for extracting formant frequencies Method for extracting formant frequencies

1987-10-22

1989-11-21

Salce, Patrick R.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

381 51, 3645135, G10L 904

Patent

active

048827584

ABSTRACT:
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.

REFERENCES:
patent: 3649765 (1972-03-01), Rabiner et al.
patent: 4346262 (1982-08-01), Willems et al.
patent: 4486899 (1984-12-01), Fushikida
patent: 4536886 (1985-08-01), Papamichalis et al.

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