Introduction

Abstract

Language is the most essential means of human communication. It is used in two modes: as spoken language (speech communication) and as written language (textual communication). Speech communication technology helps to mitigate a number of physical constraints and technological limitations, most notably, bandwidth limitations of the telephone channel, shortage of radio frequencies, acoustic background noise at the near-end (receiving side), acoustic background noise at the far-end (transmitting side), and so on. The enormous advances in signal processing technology have contributed to the success of speech signal processing. At present, integrated digital signal processors allow economic real-time implementations of complex algorithms, which require several thousand operations per speech sample. For this reason, advanced speech signal processing functions can be implemented in cellular phones and audio–visual terminals. The chapter also presents an overview on the key concepts discussed in this book.

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