Mathematical Models for Speech Technology - download pdf or read online

By Stephen Levinson

ISBN-10: 0470020903

ISBN-13: 9780470020906

ISBN-10: 0470844078

ISBN-13: 9780470844076

Mathematical Modes of Spoken Language provides the motivations for, intuitions at the back of, and easy mathematical versions of common spoken language conversation. A entire evaluation is given of all facets of the matter from the physics of speech construction during the hierarchy of linguistic constitution and finishing with a few observations on language and brain.

The writer comprehensively explores the argument that those glossy applied sciences are literally the main vast compilations of linguistic wisdom on hand. during the booklet, the emphasis is on putting all of the fabric in a mathematically coherent and computationally tractable framework that captures linguistic constitution.

It offers fabric that looks nowhere else and provides a unification of formalisms and views utilized by linguists and engineers. Its particular gains contain a coherent nomenclature that emphasizes the deep connections among the varied mathematical types and explores the equipment through which they trap linguistic constitution.

This contrasts with the various superficial similarities defined within the present literature; the historic history and origins of the theories and versions; the connections to similar disciplines, e.g. synthetic intelligence, automata idea and data concept; an elucidation of the present debates and their highbrow origins; many vital little-known effects and a few unique proofs of primary effects, e.g. a geometrical interpretation of parameter estimation suggestions for stochastic versions and eventually the author's personal certain views at the way forward for this self-discipline.

There is an enormous literature on Speech attractiveness and Synthesis despite the fact that this publication is in contrast to the other within the box. even though it seems to be a quickly advancing box, the basics haven't replaced in many years. lots of the effects are awarded in journals from which it truly is tough to combine and evaluation all of those contemporary principles. the various basics were accumulated into textbooks, which offer exact descriptions of the strategies yet no motivation or point of view. The linguistic texts are in general descriptive and pictorial, missing the mathematical and computational elements. This booklet moves an invaluable stability by means of overlaying a variety of rules in a standard framework. It offers the entire easy algorithms and computational thoughts and an research and standpoint, which permits one to intelligently learn the newest literature and comprehend state of the art concepts as they evolve.

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Extra resources for Mathematical Models for Speech Technology

Example text

1 is the source–filter model of Dudley [69] shown in Fig. 6. In this model, the acoustic tube with time-varying area function is characterized by a filter with time-varying coefficients. The input to the filter is a mixture of a quasi-periodic signal and a noise source. When the filter is excited by the input signal the output is a voltage analog of the sound pressure wave p(t). The source–filter model is easily implemented in either analog or digital hardware and is the basis for all speech processing technology.

A R(p − 1)  1   a2 ..   .. . R(0) ap    R(1)    ..  =. 49) m=1 with N ∼ = 100. 48) to that matrix, there is an efficient algorithm for solving for the ak due to Durbin [265]. Let E 0 = R(0). Then, for 1 ≤ i ≤ p, compute the partial correlation coefficients (PARCORs) according to  ki = 1  Rn (i) − E (i−1)  i−1 aj(i−1) Rn (i − j ) . 51) (i−1) aj(i) = aj(1−i) − ki ai−j . 52) and, for 1 ≤ j ≤ i − 1, Then the residual error is updated from E (i) = (1 − ki2 )E (i−1) . 53) Finally, the desired LPCs for a pth-order predictor are (p) aj = aj , for 1 ≤ j ≤ p.

43) is equivalent to the solution of the lossless Webster equation. Thus the very general method of linear prediction is actually a physical model of the speech signal. 45) are just the formants or resonances that appear in the solution to the Webster equation as indicated in Fig. 4. Write the poles in the form of zi = |z|ej θi . 58) θi = and respectively. 54). 60) are often used in preference to the ai themselves. 61) and, for n = 1, 2, . . , n−1 cn = an + k=1 k an−k ck . 60). This modification is called the mel-scale cepstrum [59, 314].

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Mathematical Models for Speech Technology by Stephen Levinson


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