Speech Enhancement in the Karhunen-Loeve Expansion Domain
Seiten
2011
Morgan & Claypool Publishers (Verlag)
978-1-60845-604-8 (ISBN)
Morgan & Claypool Publishers (Verlag)
978-1-60845-604-8 (ISBN)
Examines the problem of speech enhancement where the objective is the recovery of a signal of interest (i.e., speech) from noisy observations. The book focuses on developing and analysing optimal filters in the Karhunen-Loève expansion (KLE) domain. Both theoretical analysis and experiments are provided to study the performance of these filters.
This book is devoted to the study of the problem of speech enhancement whose objective is the recovery of a signal of interest (i.e., speech) from noisy observations. Typically, the recovery process is accomplished by passing the noisy observations through a linear filter (or a linear transformation). Since both the desired speech and undesired noise are filtered at the same time, the most critical issue of speech enhancement resides in how to design a proper optimal filter that can fully take advantage of the difference between the speech and noise statistics to mitigate the noise effect as much as possible while maintaining the speech perception identical to its original form. The optimal filters can be designed either in the time domain or in a transform space. As the title indicates, this book will focus on developing and analyzing optimal filters in the Karhunen-Loève expansion (KLE) domain. We begin by describing the basic problem of speech enhancement and the fundamental principles to solve it in the time domain. We then explain how the problem can be equivalently formulated in the KLE domain. Next, we divide the general problem in the KLE domain into four groups, depending on whether interframe and interband information is accounted for, leading to four linear models for speech enhancement in the KLE domain. For each model, we introduce signal processing measures to quantify the performance of speech enhancement, discuss the formation of different cost functions, and address the optimization of these cost functions for the derivation of different optimal filters. Both theoretical analysis and experiments will be provided to study the performance of these filters and the links between the KLE-domain and time-domain optimal filters will be examined.
This book is devoted to the study of the problem of speech enhancement whose objective is the recovery of a signal of interest (i.e., speech) from noisy observations. Typically, the recovery process is accomplished by passing the noisy observations through a linear filter (or a linear transformation). Since both the desired speech and undesired noise are filtered at the same time, the most critical issue of speech enhancement resides in how to design a proper optimal filter that can fully take advantage of the difference between the speech and noise statistics to mitigate the noise effect as much as possible while maintaining the speech perception identical to its original form. The optimal filters can be designed either in the time domain or in a transform space. As the title indicates, this book will focus on developing and analyzing optimal filters in the Karhunen-Loève expansion (KLE) domain. We begin by describing the basic problem of speech enhancement and the fundamental principles to solve it in the time domain. We then explain how the problem can be equivalently formulated in the KLE domain. Next, we divide the general problem in the KLE domain into four groups, depending on whether interframe and interband information is accounted for, leading to four linear models for speech enhancement in the KLE domain. For each model, we introduce signal processing measures to quantify the performance of speech enhancement, discuss the formation of different cost functions, and address the optimization of these cost functions for the derivation of different optimal filters. Both theoretical analysis and experiments will be provided to study the performance of these filters and the links between the KLE-domain and time-domain optimal filters will be examined.
Introduction
Problem Formulation
Optimal Filters in the Time Domain
Linear Models for Signal Enhancement in the KLE Domain
Optimal Filters in the KLE Domain with Model 1
Optimal Filters in the KLE Domain with Model 2
Optimal Filters in the KLE Domain with Model 3
Optimal Filters in the KLE Domain with Model 4
Experimental Study
| Reihe/Serie | Synthesis Lectures on Speech and Audio Processing |
|---|---|
| Verlagsort | San Rafael |
| Sprache | englisch |
| Maße | 187 x 235 mm |
| Themenwelt | Mathematik / Informatik ► Informatik |
| Technik ► Elektrotechnik / Energietechnik | |
| ISBN-10 | 1-60845-604-8 / 1608456048 |
| ISBN-13 | 978-1-60845-604-8 / 9781608456048 |
| Zustand | Neuware |
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