Advances in Non-Linear Modeling for Speech Processing / Edition 1

by Raghunath S. Holambe, Mangesh S. Deshpande

Overview

Advances in Non-Linear Modeling for Speech Processing includes advanced topics in non-linear estimation and modeling techniques along with their applications to speaker recognition.

Non-linear aeroacoustic modeling approach is used to estimate the important fine-structure speech events, which are not revealed by the short time Fourier transform (STFT). This aeroacostic modeling approach provides the impetus for the high resolution Teager energy operator (TEO). This operator is characterized by a time resolution that can track rapid signal energy changes within a glottal cycle.

The cepstral features like linear prediction cepstral coefficients (LPCC) and mel frequency cepstral coefficients (MFCC) are computed from the magnitude spectrum of the speech frame and the phase spectra is neglected. To overcome the problem of neglecting the phase spectra, the speech production system can be represented as an amplitude modulation-frequency modulation (AM-FM) model. To demodulate the speech signal, to estimation the amplitude envelope and instantaneous frequency components, the energy separation algorithm (ESA) and the Hilbert transform demodulation (HTD) algorithm are discussed.

Different features derived using above non-linear modeling techniques are used to develop a speaker identification system. Finally, it is shown that, the fusion of speech production and speech perception mechanisms can lead to a robust feature set.

Product Details

ISBN-13:	9781461415046
Publisher:	Springer New York
Publication date:	02/21/2012
Series:	SpringerBriefs in Speech Technology
Edition description:	2012
Pages:	102
Product dimensions:	6.10(w) x 9.25(h) x 0.01(d)

Table of Contents

From the Contents: Speech production mechanism.- Linear speech production model.- Nonlinearity in speech production.- Nonlinear dynamic system model.- Speech perception mechanism.- Summary.- Autoregressive models.- Linear autoregressive model.- Nonlinear autoregressive model.- Nonlinear measurement and modeling using Teager energy operator.- Teager energy operator (TEO).- Vocal tract aeroacoustic flow.- Energy measurement.- Energy separation.- Noise suppression using TEO.