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Discrete-Time Speech Signal Processing: Principles and Practice by Thomas F. Quatieri - Massachusetts Institute of Technology Lincoln Laboratory

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Chapter 11Nonlinear Measurement and Modeling Techniques

11.1 Introduction

Throughout the text, we have seen or alluded to examples of speech events that occur on a fine time scale, for example, on the order of about a pitch period or less. Such speech events, which we will loosely refer to as “fine structure” in the speech waveform, arise from either time-varying linear or nonlinear elements of the speech production mechanism and have importance in distinguishing sounds and voice types. In the context of the linear model, rapid transitions occur across speech phones such as unvoiced-to-voiced transitions, abrupt onsets of sounds such as the attack of a plosive or a voiced sound, and events that are short-lived, closely spaced, or even overlapping ...

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