Distant Speech Recognition [Matthias Wolfel] 2009.pdf

DISTANT SPEECH

RECOGNITION

Distant Speech Recognition Matthias W¨olfel and John McDonough

DISTANT SPEECH

RECOGNITION

Matthias Wolfel

Universitat Karlsruhe (TH), Germany

and

John McDonough

Universitat des Saarlandes, Germany

A John Wiley and Sons, Ltd., Publication

This edition ﬁrst published 2009

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Library of Congress Cataloging-in-Publication Data

Wolfel, Matthias.

Distant speech recognition / Matthias Wolfel, John McDonough.

p. cm.

Includes bibliographical references and index.

ISBN 978-0-470-51704-8 (cloth)

1. Automatic speech recognition. I. McDonough, John (John W.) II. Title.

TK7882.S65W64 2009

006.4 54–dc22

2008052791

A catalogue record for this book is available from the British Library

ISBN 978-0-470-51704-8 (H/B)

Typeset in 10/12 Times by Laserwords Private Limited, Chennai, India

Printed and bound in Great Britain by Antony Rowe Ltd, Chippenham, Wiltshire

Contents

Foreword

xiii

Preface

xvii

Introduction

1.1

Research and Applications in Academia and Industry

1.1.1

Intelligent Home and Ofﬁce Environments

1.1.2 Humanoid Robots

1.1.3 Automobiles

1.1.4

Speech-to-Speech Translation

1.2

Challenges in Distant Speech Recognition

1.3

System Evaluation

1.4

Fields of Speech Recognition

1.5

Robust Perception

1.5.1 A Priori Knowledge

1.5.2 Phonemic Restoration and Reliability

1.5.3 Binaural Masking Level Difference

1.5.4 Multi-Microphone Processing

1.5.5 Multiple Sources by Different Modalities

1.6

Organizations, Conferences and Journals

1.7

Useful Tools, Data Resources and Evaluation Campaigns

1.8

Organization of this Book

1.9

Principal Symbols used Throughout the Book

1.10 Units used Throughout the Book

2 tis

2.1

Physical Aspect of Sound

2.1.1 Propagation of Sound in Air

2.1.2

The Speed of Sound

2.1.3 Wave Equation and Velocity Potential

2.1.4

Sound Intensity and Acoustic Power

2.1.5 Reﬂections of Plane Waves

2.1.6 Reﬂections of Spherical Waves

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