Effect of GCI perturbation on speech quality in Indian languages

Author

Lehana, Parveen K. ; Pandey, Prem C.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., Mumbai, India

Volume

3

fYear

2003

fDate

15-17 Oct. 2003

Firstpage

959

Abstract

Harmonic plus noise model (HNM) divides the speech spectrum into two bands: harmonic and noise. One is modeled with harmonics of the fundamental and the other is simulated using random noise. As HNM analysis/synthesis is performed at each glottal closure instant (GCI), errors in estimation of GCIs affect the quality of the synthesized speech. The objective of this paper is to investigate the effect of the perturbation in GCIs on the synthesized speech quality. Childers and Hu´s algorithm is used for GCIs calculations. Investigations show that the speech quality is very sensitive to positions of the GCIs. A small perturbation with maximum of 4 % of the local pitch period considerably degrades the synthesized speech. Perturbations above 8 % severely affect quality of the output speech.

Keywords

natural languages; random noise; speech processing; speech synthesis; Childers algorithm; Indian language speech quality; glottal closure instant perturbation effect; harmonic plus noise model; local pitch period; synthesized speech quality; Degradation; Electronic mail; Estimation error; Frequency; Natural languages; Performance analysis; Signal processing; Speech analysis; Speech enhancement; Speech synthesis;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2003. Conference on Convergent Technologies for the Asia-Pacific Region

Print_ISBN

0-7803-8162-9

Type

conf

DOI

10.1109/TENCON.2003.1273389

Filename

1273389