Time-varying quasi-closed-phase weighted linear prediction analysis of speech for accurate formant detection and tracking

Dhananjaya Gowda, Paavo Alku

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

In this paper, we propose a new method for accurate detection, estimation and tracking of formants in speech signals using time-varying quasi-closed phase analysis (TVQCP). The proposed method combines two different methods of analysis namely, the time-varying linear prediction (TVLP) and quasiclosed phase (QCP) analysis. TVLP helps in better tracking of formant frequencies by imposing a time-continuity constraint on the linear prediction (LP) coefficients. QCP analysis, a type of weighted LP (WLP), improves the estimation accuracies of the formant frequencies by using a carefully designed weight function on the error signal that is minimized. The QCP weight function emphasizes the closed-phase region of the glottal cycle, and also weights down the regions around the main excitations. This results in reduced coupling of the subglottal cavity and the excitation source. Experimental results on natural speech signals show that the proposed method performs considerably better than the detect-and-track approach used in popular tools like Wavesurfer or Praat.

Original languageEnglish
Title of host publicationProceedings of the Annual Conference of the International Speech Communication Association
Subtitle of host publicationInterspeech'16, San Francisco, USA, Sept. 8-12, 2016
PublisherInternational Speech Communication Association
Pages1760-1764
Number of pages5
Volume08-12-September-2016
ISBN (Electronic)978-1-5108-3313-5
DOIs
Publication statusPublished - 2016
MoE publication typeA4 Article in a conference publication
EventInterspeech - San Francisco, United States
Duration: 8 Sep 201612 Sep 2016
Conference number: 17

Publication series

NameProceedings of the Annual Conference of the International Speech Communication Association
PublisherInternational Speech Communication Association
ISSN (Print)1990-9770
ISSN (Electronic)2308-457X

Conference

ConferenceInterspeech
CountryUnited States
CitySan Francisco
Period08/09/201612/09/2016

Keywords

  • Quasi-closed-phase (QCP) analysis
  • Time-varying linear prediction (TVLP)
  • Time-varying quasi-closed phase (TVQCP) analysis
  • Time-varying weighted linear prediction (TVWLP)
  • Weighted linear prediction (WLP)

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