Stereophonic Acoustic Echo Cancellation and Cross-talk Cancellation PDF Download
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Author: Takatoshi Okuno
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Takatoshi Okuno
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Jacob Benesty
Publisher: Springer Science & Business Media
ISBN: 3642225748
Category : Technology & Engineering
Languages : en
Pages : 141
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Book Description
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:
Category :
Languages : en
Pages : 0
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Author: Lino Garcia Morales
Publisher: IntechOpen
ISBN: 9789533071589
Category : Computers
Languages : en
Pages : 412
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Book Description
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: 3662044374
Category : Technology & Engineering
Languages : en
Pages : 232
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Book Description
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:
Category :
Languages : en
Pages :
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Author: JeongHee Kim
Publisher:
ISBN:
Category : Adaptive filters
Languages : en
Pages : 258
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Author: Nisachon Tangsangiumvisai
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Santosh Ande
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659368394
Category :
Languages : en
Pages : 84
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Book Description
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: 9789178741106
Category :
Languages : en
Pages : 167
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