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Author : Takatoshi Okuno
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (277 download)
Download or read book Stereophonic Acoustic Echo Cancellation and Cross-talk Cancellation written by Takatoshi Okuno and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jacob Benesty
Publisher : Springer Science & Business Media
ISBN 13 : 3642225748
Total Pages : 141 pages
Book Rating : 4.6/5 (422 download)
Download or read book A Perspective on Stereophonic Acoustic Echo Cancellation written by Jacob Benesty and published by Springer Science & Business Media. This book was released on 2011-07-25 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single-channel hands-free teleconferencing systems are becoming popular. In order to enhance the communication quality of these systems, more and more stereophonic sound devices with two loudspeakers and two microphones are deployed. Because of the coupling between loudspeakers and microphones, there may be strong echoes, which make real-time communication very difficult. The best way we know to cancel these echoes is via a stereo acoustic echo canceller (SAEC), which can be modelled as a two-input/two-output system with real random variables. In this work, the authors recast this problem into a single-input/single-output system with complex random variables thanks to the widely linear model. From this new convenient formulation, they re-derive the most important aspects of a SAEC, including identification of the echo paths with adaptive filters, double-talk detection, and suppression.
Author : Takatoshi Okuno
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (592 download)
Download or read book Stereophonic Echo Cancellation and Cross-talk Cancellation written by Takatoshi Okuno and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lino Garcia Morales
Publisher : IntechOpen
ISBN 13 : 9789533071589
Total Pages : 412 pages
Book Rating : 4.0/5 (715 download)
Download or read book Adaptive Filtering written by Lino Garcia Morales and published by IntechOpen. This book was released on 2011-09-06 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive filtering is useful in any application where the signals or the modeled system vary over time. The configuration of the system and, in particular, the position where the adaptive processor is placed generate different areas or application fields such as prediction, system identification and modeling, equalization, cancellation of interference, etc., which are very important in many disciplines such as control systems, communications, signal processing, acoustics, voice, sound and image, etc. The book consists of noise and echo cancellation, medical applications, communications systems and others hardly joined by their heterogeneity. Each application is a case study with rigor that shows weakness/strength of the method used, assesses its suitability and suggests new forms and areas of use. The problems are becoming increasingly complex and applications must be adapted to solve them. The adaptive filters have proven to be useful in these environments of multiple input/output, variant-time behaviors, and long and complex transfer functions effectively, but fundamentally they still have to evolve. This book is a demonstration of this and a small illustration of everything that is to come.
Author : J. Benesty
Publisher : Springer Science & Business Media
ISBN 13 : 3662044374
Total Pages : 232 pages
Book Rating : 4.6/5 (62 download)
Download or read book Advances in Network and Acoustic Echo Cancellation written by J. Benesty and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together many advanced topics in network and acoustic echo cancellation aimed towards enhancing the echo cancellation performance of next-generation telecommunication systems. The resulting compendium provides a coherent treatment of such topics not found otherwise in journals or other books.
Author : Neil Thomas Forsyth
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (594 download)
Download or read book A Subband and Noise Robust Approach to Stereophonic Acoustic Echo Cancellation written by Neil Thomas Forsyth and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : JeongHee Kim
Publisher :
ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.:/5 (458 download)
Download or read book Effects of Room Impulse Responses to Stereophonic Acoustic Echo Cancellation written by JeongHee Kim and published by . This book was released on 2000 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nisachon Tangsangiumvisai
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (832 download)
Download or read book Algorithms and Structures for Stereophonic Acoustic Echo Cancellation written by Nisachon Tangsangiumvisai and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Steven L. Gay
Publisher : Springer Science & Business Media
ISBN 13 : 1441986448
Total Pages : 338 pages
Book Rating : 4.4/5 (419 download)
Download or read book Acoustic Signal Processing for Telecommunication written by Steven L. Gay and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: 158 2. Wiener Filtering 159 3. Speech Enhancement by Short-Time Spectral Modification 3. 1 Short-Time Fourier Analysis and Synthesis 159 160 3. 2 Short-Time Wiener Filter 161 3. 3 Power Subtraction 3. 4 Magnitude Subtraction 162 3. 5 Parametric Wiener Filtering 163 164 3. 6 Review and Discussion Averaging Techniques for Envelope Estimation 169 4. 169 4. 1 Moving Average 170 4. 2 Single-Pole Recursion 170 4. 3 Two-Sided Single-Pole Recursion 4. 4 Nonlinear Data Processing 171 5. Example Implementation 172 5. 1 Subband Filter Bank Architecture 172 173 5. 2 A-Posteriori-SNR Voice Activity Detector 5. 3 Example 175 6. Conclusion 175 Part IV Microphone Arrays 10 Superdirectional Microphone Arrays 181 Gary W. Elko 1. Introduction 181 2. Differential Microphone Arrays 182 3. Array Directional Gain 192 4. Optimal Arrays for Spherically Isotropic Fields 193 4. 1 Maximum Gain for Omnidirectional Microphones 193 4. 2 Maximum Directivity Index for Differential Microphones 195 4. 3 Maximimum Front-to-Back Ratio 197 4. 4 Minimum Peak Directional Response 200 4. 5 Beamwidth 201 5. Design Examples 201 5. 1 First-Order Designs 202 5. 2 Second-Order Designs 207 5. 3 Third-Order Designs 216 5. 4 Higher-Order designs 221 6. Optimal Arrays for Cylindrically Isotropic Fields 222 6. 1 Maximum Gain for Omnidirectional Microphones 222 6. 2 Optimal Weights for Maximum Directional Gain 224 6. 3 Solution for Optimal Weights for Maximum Front-to-Back Ratio for Cylindrical Noise 225 7. Sensitivity to Microphone Mismatch and Noise 230 8.
Author : Santosh Ande
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659368394
Total Pages : 84 pages
Book Rating : 4.3/5 (683 download)
Download or read book Stereo Echo Cancellation for Spatiality Employing Signal Decorrelation written by Santosh Ande and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: In future tele-conferencing systems, because of wide range communication needs in daily life with multi users talking simultaneously the conventional AEC systems does not give good spatial speech realism. This book describes simple and effective techniques to decoorelate the stereo signals so that correct identification of stereo echo path responses is possible. Implemented a Stereo Echo Cancellation(SEC) system employing signal decorrelation with emphasis Affine Projection Algorithm (APA). The echo path models are simulated using RIR image method. The techniques used for decorrelation are Non linear Processing(NLP) using half rectifiers and Time Varying All pass Filters(TV-APF). The two channel Affine projection Algorithm was used to adapt the echo path responses. The echo path models are simulated using Room Impulse Response(RIR) with image method. This is totally done in MATLAB environment. This echo canceler is set to achieve good spatial communication and speech perception between transmitting and receiving sides where even more than two people talking while moving around with dual microphones setup for communication.The ERLE in case TV-APF was about 40.3231dB which is good.
Author : Peter Eneroth
Publisher :
ISBN 13 : 9789178741106
Total Pages : 167 pages
Book Rating : 4.7/5 (411 download)
Download or read book Stereophonic Acoustic Echo Cancellation written by Peter Eneroth and published by . This book was released on 2001 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jacob Benesty
Publisher : Springer Science & Business Media
ISBN 13 : 3662110288
Total Pages : 366 pages
Book Rating : 4.6/5 (621 download)
Download or read book Adaptive Signal Processing written by Jacob Benesty and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the first time, a reference on the most relevant applications of adaptive filtering techniques. Top researchers in the field contributed chapters addressing applications in acoustics, speech, wireless and networking, where research is still very active and open.
Author : Thomas Kurz
Publisher : Universitätsverlag Göttingen
ISBN 13 : 3938616962
Total Pages : 485 pages
Book Rating : 4.9/5 (386 download)
Download or read book Oscillations, Waves and Interactions written by Thomas Kurz and published by Universitätsverlag Göttingen. This book was released on 2007 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Julian A. Chacon-Castaño
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (123 download)
Download or read book Exploration of Alternative Algorithms for Multi-channel Acoustic Echo Cancellation written by Julian A. Chacon-Castaño and published by . This book was released on 2020 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-Channel Acoustic Echo cancellation (MCAEC) is a vital component of delivering clean speech to a virtual personal assistant through a smart speaker with multi-channel audio (stereophonic, etc). The use of the Kalman filter as an alternative adaptive filter methodology for this MCAEC application is explored in this work. The Normalized Least Mean Squares filter (NLMS) serves as a benchmark for the Kalman filter. Simulations using room recordings and measured room responses are employed in this exploration. Useful metrics such as the Word Error Rate (WER) and Echo Return Loss Enhancement (ERLE) help to distinguish performance among the two adaptive filter algorithms. For the single channel case, simulations confirm the cancellation and convergence rate advantage of the Kalman filter, in full-band, but the NLMS filter gives similar results in the sub-band domain, as measured by WER and ERLE. In the multi-channel case, both solutions achieve similar steady state cancellation, but the NLMS offers slightly faster convergence rates. In experiments where adaptation was not frozen, the Kalman filter effectively maintains high echo cancellation by tracking input signal statistics. In most cases, the Kalman filter does not present an appropriate alternative for the MCAEC application in this work.
Download or read book Adaptive Algorithms Employing Tap Selection for Single Channel and Stereophonic Acoustic Echo Cancellation written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Eberhard Hänsler
Publisher : John Wiley & Sons
ISBN 13 : 0471678392
Total Pages : 474 pages
Book Rating : 4.4/5 (716 download)
Download or read book Acoustic Echo and Noise Control written by Eberhard Hänsler and published by John Wiley & Sons. This book was released on 2005-02-04 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Authors are well known and highly recognized by the "acoustic echo and noise community." Presents a detailed description of practical methods to control echo and noise Develops a statistical theory for optimal control parameters and presents practical estimation and approximation methods
Author : Lino Garcia Morales
Publisher : BoD – Books on Demand
ISBN 13 : 9533071583
Total Pages : 414 pages
Book Rating : 4.5/5 (33 download)
Download or read book Adaptive Filtering written by Lino Garcia Morales and published by BoD – Books on Demand. This book was released on 2011-09-06 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive filtering is useful in any application where the signals or the modeled system vary over time. The configuration of the system and, in particular, the position where the adaptive processor is placed generate different areas or application fields such as prediction, system identification and modeling, equalization, cancellation of interference, etc., which are very important in many disciplines such as control systems, communications, signal processing, acoustics, voice, sound and image, etc. The book consists of noise and echo cancellation, medical applications, communications systems and others hardly joined by their heterogeneity. Each application is a case study with rigor that shows weakness/strength of the method used, assesses its suitability and suggests new forms and areas of use. The problems are becoming increasingly complex and applications must be adapted to solve them. The adaptive filters have proven to be useful in these environments of multiple input/output, variant-time behaviors, and long and complex transfer functions effectively, but fundamentally they still have to evolve. This book is a demonstration of this and a small illustration of everything that is to come.
