Pole focusing: a new approach to LPC-based speech analysis offering superior formant resolution

Author

Duncan, G. ; Jack, M.A.

Author_Institution

Centre for Speech Technol. Res., Edinburgh Univ., UK

fYear

1988

fDate

11-14 Apr 1988

Firstpage

2256

Abstract

The technique presented, termed pole focusing, provides an approach to obtaining high-resolution formant data from the short-time spectrum. Formant estimation is based on modeling the vocal tract frequency response using linear prediction coding (LPC) techniques. However, the pole-focusing technique is the antithesis of standard LPC analysis, in that large model orders are used and preemphasis is not required. The technique involves averaging over several spectral estimates within any single analysis frame, which also aids in conferring very high noise immunity to the estimation process

Keywords

encoding; estimation theory; noise; speech analysis and processing; LPC-based speech analysis; estimation process; formant resolution; linear prediction coding; noise immunity; pole focusing; short-time spectrum; spectral estimates; vocal tract frequency response; Filters; Frequency estimation; Frequency measurement; Frequency response; Lifting equipment; Linear predictive coding; Position measurement; Resonance; Speech analysis; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on

Conference_Location

New York, NY

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1988.197086

Filename

197086