Effects of Room Impulse Responses to Stereophonic Acoustic Echo Cancellation PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Effects of Room Impulse Responses to Stereophonic Acoustic Echo Cancellation PDF full book. Access full book title Effects of Room Impulse Responses to Stereophonic Acoustic Echo Cancellation by JeongHee Kim. Download full books in PDF and EPUB format.
Author: JeongHee Kim
Publisher:
ISBN:
Category : Adaptive filters
Languages : en
Pages : 258
Get Book Here
Book Description
Author: JeongHee Kim
Publisher:
ISBN:
Category : Adaptive filters
Languages : en
Pages : 258
Get Book Here
Book Description
Author: Jacob Benesty
Publisher: Springer Science & Business Media
ISBN: 3642225748
Category : Technology & Engineering
Languages : en
Pages : 141
Get Book Here
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: J. Benesty
Publisher: Springer Science & Business Media
ISBN: 3662044374
Category : Technology & Engineering
Languages : en
Pages : 232
Get Book Here
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: Eberhard Hänsler
Publisher: Springer Science & Business Media
ISBN: 3540332138
Category : Technology & Engineering
Languages : en
Pages : 648
Get Book Here
Book Description
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.
Author: Santosh Ande
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659368394
Category :
Languages : en
Pages : 84
Get Book Here
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: Kun Shi
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages :
Get Book Here
Book Description
The objective of this research is to presents new acoustic echo cancellation design methods that can effectively work in the nonlinear environment. Acoustic echo is an annoying issue for voice communication systems. Because of room acoustics and delay in the transmission path, echoes affect the sound quality and may hamper communications. Acoustic echo cancellers (AECs) are employed to remove the acoustic echo while keeping full-duplex communications. AEC designs face a variety of challenges, including long room impulse response, acoustic path nonlinearity, ambient noise, and double-talk situation. We investigate two parts of echo canceller design: echo cancellation algorithm design and control logic algorithm design. In the first part, our work focuses on the nonlinear adaptive and fast-convergence algorithms. We investigate three different structures: predistortion linearization, cascade structure, and nonlinear residual echo suppressor. Specifically, we are interested in the coherence function, since it provides a means for quantifying linear association between two stationary random processes. By using the coherence as a criterion to design the nonlinear echo canceller in the system, our method guarantees the algorithm stability and leads to a faster convergence rate. In the second part, our work focuses on the robustness of AECs in the presence of interference. With regard to the near-end speech, we investigate the double-talk detector (DTD) design in conjunction with nonlinear AECs. Specifically, we propose to design a DTD based on the mutual information (MI). We show that the advantage of the MI-based method, when compared with the existing methods, is that it is applicable to both the linear and nonlinear scenarios. With respect to the background noise, we propose a variable step-size and variable tap-length least mean square (LMS) algorithm. Based on the fact that the room impulse response usually exhibits an exponential decay power profile in acoustic echo cancellation applications, the proposed method finds optimal step size and tap length at each iteration. Thus, it achieves faster convergence rate and better steady-state performance. We show a number of experimental results to illustrate the performance of the proposed algorithms.
Author:
Publisher:
ISBN:
Category : Acoustical engineering
Languages : en
Pages : 362
Get Book Here
Book Description
Author: Eberhard Hänsler
Publisher: John Wiley & Sons
ISBN: 0471678392
Category : Science
Languages : en
Pages : 474
Get Book Here
Book Description
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: Jacob Benesty
Publisher: Springer Science & Business Media
ISBN: 3662110288
Category : Technology & Engineering
Languages : en
Pages : 366
Get Book Here
Book Description
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: Tapio Lokki
Publisher: MDPI
ISBN: 3038429074
Category : Science
Languages : en
Pages : 621
Get Book Here
Book Description
This book is a printed edition of the Special Issue "Sound and Music Computing" that was published in Applied Sciences
