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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 1Introduction

1.1 Discrete-Time Speech Signal Processing

Speech has evolved as a primary form of communication between humans. Nevertheless, there often occur conditions under which we measure and then transform the speech signal to another form in order to enhance our ability to communicate. One early case of this is the transduction by a telephone handset of the continuously-varying speech pressure signal at the lips output to a continuously-varying (analog) electric voltage signal. The resulting signal can be transmitted and processed electrically with analog circuitry and then transduced back by the receiving handset to a speech pressure signal. With the advent of the wonders of digital technology, the analog-to-digital (A/D) converter ...

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