A time warper for speech signals

Author

Sluijter, R.J. ; Janssen, A. J E M

Author_Institution

Philips Res. Lab., Eindhoven, Netherlands

fYear

1999

fDate

1999

Firstpage

150

Lastpage

152

Abstract

A parabolic time warper designed to enhance the stationarity of voiced speech segments, is presented. It is shown how, for a harmonic signal segment, the parabolic time warping function can remove the part of the frequency variation which progresses linearly with time, without changing the time duration of that segment. In the actual implementation of the time warping system, the linear part of the pitch frequency variation in a segment is removed on the basis of maximization of the pitch-related autocorrelation peak of the warped signal. As a by-product, the time warper yields a very reliable pitch estimation. An example on real speech is discussed

Keywords

correlation methods; harmonic analysis; parameter estimation; speech processing; frequency variation; harmonic signal segment; parabolic time warper; parabolic time warping function; pitch frequency variation; pitch-related autocorrelation peak maximization; real speech; reliable pitch estimation; speech signals; time duration; voiced speech segments; warped signal; Autocorrelation; Differential equations; Frequency; Laboratories; Signal analysis; Speech coding; Speech enhancement;

fLanguage

English

Publisher

ieee

Conference_Titel

Speech Coding Proceedings, 1999 IEEE Workshop on

Conference_Location

Porvoo

Print_ISBN

0-7803-5651-9

Type

conf

DOI

10.1109/SCFT.1999.781514

Filename

781514