Projection-based group delay scheme for speech recognition

Author

Tung, Shin-Lun ; Lei, I. Shine ; Yau-Tarng Juang

Author_Institution

Dept. of Electr. Eng., Nat. Central Univ., Chung-Li, Taiwan

Volume

4

Issue

2

fYear

1996

fDate

3/1/1996 12:00:00 AM

Firstpage

138

Lastpage

140

Abstract

This paper deals with speech recognition in a noisy environment. Some robust properties of the group delay spectrum are derived, and a projection-based group delay scheme is proposed for noisy speech recognition. Experiments show that the proposed new scheme obtains better recognition results, especially under low signal-to-noise ratio (SNR) conditions. When the features of speech signals are obtained from the group delay spectrum, the continuous hidden Markov models (CHMMs) are used for speaker-dependent speech recognition. The robustness of the noisy group delay spectrum is analyzed through a noisy speech model and histograms, respectively. We apply the projection measure to the CHMM and derive the correlative formulas

Keywords

correlation methods; delays; hidden Markov models; noise; spectral analysis; speech recognition; CHMM; SNR; continuous hidden Markov models; correlative formulas; experiments; group delay spectrum; histograms; low signal-to-noise ratio; noisy environment; noisy speech model; noisy speech recognition; projection measure; projection-based group delay; recognition results; robust properties; speaker-dependent speech recognition; speech signals; Additive noise; Cepstrum; Delay; Distortion measurement; Linear predictive coding; Noise reduction; Signal to noise ratio; Speech analysis; Speech recognition; Working environment noise;

fLanguage

English

Journal_Title

Speech and Audio Processing, IEEE Transactions on

Publisher

ieee

ISSN

1063-6676

Type

jour

DOI

10.1109/89.486064

Filename

486064