Users of signal processing systems are never satis?ed with the system they currently use. They are constantly asking for higher quality, faster perf- mance, more comfort and lower prices. Researchers and developers should be appreciative for this attitude. It justi?es their constant e?ort for improved systems. Better knowledge about biological and physical interrelations c- ing along with more powerful technologies are their engines on the endless road to perfect systems. This book is an impressive image of this process. After "Acoustic Echo 1 and Noise Control" published in 2004 many new results lead to "Topics in 2 Acoustic Echo and Noise Control" edited in 2006 . Today - in 2008 - even morenew?ndingsandsystemscouldbecollectedinthisbook.Comparingthe contributions in both edited volumes progress in knowledge and technology becomesclearlyvisible: Blindmethodsandmultiinputsystemsreplace"h- ble" low complexity systems. The functionality of new systems is less and less limited by the processing power available under economic constraints. The editors have to thank all the authors for their contributions. They cooperated readily in our e?ort to unify the layout of the chapters, the ter- nology, and the symbols used. It was a pleasure to work with all of them. Furthermore, it is the editors concern to thank Christoph Baumann and the Springer Publishing Company for the encouragement and help in publi- ing this book.

In this book, an international team of highly qualified experts treats important topics in "Acoustic Echo and Noise Control" and report the latest developments. Methods for enhancing the quality of transmitted speech signals are gaining growing attention in universities and in industrial development laboratories.

This book is organized in five parts: Part I gives a short introduction to acoustic echo and noise control. Part II deals with multi-microphone processing. In Part III, advanced methods for both linear and nonlinear echo cancellation are presented, and techniques for intelligent control of hands-free telephones are introduced. Part IV is devoted to noise reduction procedures. An in-depth treatment of conventional and of advanced methods is given, followed by a model based approach using Kalman filters. Finally, in Part V, selected applications of acoustic echo and noise control as well as speech and audio processing in general are outlined. Topics such as auditory scene analysis, wave field synthesis for spatial sound reproduction, in-car communication systems, and hearing aids are treated.

Users of signal processing systems are never satis?ed with the system they currently use. They are constantly asking for higher quality, faster perf- mance, more comfort and lower prices. Researchers and developers should be appreciative for this attitude. It justi?es their constant e?ort for improved systems. Better knowledge about biological and physical interrelations c- ing along with more powerful technologies are their engines on the endless road to perfect systems. This book is an impressive image of this process. After "Acoustic Echo 1 and Noise Control" published in 2004 many new results lead to "Topics in 2 Acoustic Echo and Noise Control" edited in 2006 . Today - in 2008 - even morenew?ndingsandsystemscouldbecollectedinthisbook.Comparingthe contributions in both edited volumes progress in knowledge and technology becomesclearlyvisible: Blindmethodsandmultiinputsystemsreplace"h- ble" low complexity systems. The functionality of new systems is less and less limited by the processing power available under economic constraints. The editors have to thank all the authors for their contributions. They cooperated readily in our e?ort to unify the layout of the chapters, the ter- nology, and the symbols used. It was a pleasure to work with all of them. Furthermore, it is the editors concern to thank Christoph Baumann and the Springer Publishing Company for the encouragement and help in publi- ing this book.

This book treats important topics in "Acoustic Echo and Noise Control" and reports the latest developments. Methods for enhancing the quality of transmitted speech signals are gaining growing attention in universities and in industrial development laboratories. This book, written by an international team of highly qualified experts, concentrates on the modern and advanced methods.

Im Gegensatz zur klassischen Theorie werden in diesem Buch Signale durch Zufallsprozesse modelliert. Die einzelnen Abschnitte des Buches beginnen in der Regel mit einer kurzen Herleitung oder einer Definition. Anschliessend werden die neu eingefuhrten Grossen und Verbindungen zu bereits bekannten Zusammenhangen diskutiert. Jeder Abschnitt schliesst mit durchgerechneten Beispielen. Die Darstellung des Stoffes bewegt sich auf dem Mittelweg zwischen "rein anschaulich" und "streng formal." Das Buch gibt daher einem Praktiker einen ausreichenden Hintergrund fur den experimentellen Umgang mit Signalen. Gleichzeitig bereitet es Theoretiker auf das Studium weiterfuhrender Darstellungen vor. Aus den vielfaltigen Anderungen und Erganzungen fur die 3. Auflage sind die neuen Abschnitte uber Adaptionsverfahren mit affiner Projektion, Echokompensation und Gerauschreduktion hervorzuheben."

Im Gegensatz zur klassischen Theorie werden in diesem Buch Signale durch Zufallsprozesse modelliert. Die einzelnen Abschnitte des Buches beginnen in der Regel mit einer kurzen Herleitung oder einer Definition. Anschliessend werden die neu eingefuhrten Grossen und Verbindungen zu bereits bekannten Zusammenhangen diskutiert. Jeder Abschnitt schliesst mit durchgerechneten Beispielen. Die Darstellung des Stoffes bewegt sich auf dem Mittelweg zwischen "rein anschaulich" und "streng formal." Das Buch gibt daher einem Praktiker einen ausreichenden Hintergrund fur den experimentellen Umgang mit Signalen. Gleichzeitig bereitet es Theoretiker auf das Studium weiterfuhrender Darstellungen vor. Aus den vielfaltigen Anderungen und Erganzungen fur die 3. Auflage sind die neuen Abschnitte uber Adaptionsverfahren mit affiner Projektion, Echokompensation und Gerauschreduktion hervorzuheben."