Speech and Audio Processing in Adverse EnvironmentsEberhard Hänsler, Gerhard Schmidt 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. |
Contents
1 | |
7 | |
9 | |
5 | 48 |
References | 56 |
A PreFilter for HandsFree Car Phone Noise | 62 |
Evaluation and Comparison of the Results Obtained | 84 |
2 | 91 |
Evaluation of Handsfree Terminals | 338 |
References | 375 |
References | 415 |
A Experimental Determination of the Directivity Index | 460 |
Convolutive Blind Source Separation for Noisy | 469 |
References | 519 |
SpatioTemporal Adaptive Inverse Filtering | 550 |
References | 580 |
Other editions - View all
Speech and Audio Processing in Adverse Environments Eberhard Hänsler,Gerhard Schmidt No preview available - 2010 |
Speech and Audio Processing in Adverse Environments Eberhard Hänsler,Gerhard Schmidt No preview available - 2008 |
Common terms and phrases
according to Eq acoustic echo cancellation adaptive beamformers adaptive filter allpass transformation amplitude analysis applied approach approximately attenuation autocorrelation average background noise bandlimited bandwidth extension broadband BSS output calculated calibration cepstral codebook computed correlation cross-correlation crosstalk denotes dereverberation described desired signal deviations distance distortion double talk echo path engine noise evaluation filter-bank fixed beamformer Frequency in Hz frequency response hands-free terminal harmonics IEEE Trans implementation input signal ITU-T linear loudspeaker matrix measure methods microphone signals noise components noise reduction noise suppression noisy nonlinear notch filter output signal parameters performance phase pitch post-filter power spectral density Proc reconstruction reduced residual crosstalk residual echo reverberation samples signal delay Signal Processing simulation spectral envelope spectral variance speech enhancement speech quality speech signal stepsize structure subband TDOA TDOA estimates TDOA graphs transfer function transmission values vector warped zero