Optimal Time Domain Noise Reduction Filters

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Optimal Time-Domain Noise Reduction Filters

Jacob Benesty,Jingdong Chen
Optimal Time Domain Noise Reduction Filters Book PDF

Author : Jacob Benesty,Jingdong Chen
Publisher : Springer Science & Business Media
Page : 82 pages
File Size : 44,5 Mb
Release : 2011-04-15
Category : Technology & Engineering
ISBN : 9783642196010

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Optimal Time-Domain Noise Reduction Filters by Jacob Benesty,Jingdong Chen Pdf

Additive noise is ubiquitous in acoustics environments and can affect the intelligibility and quality of speech signals. Therefore, a so-called noise reduction algorithm is required to mitigate the effect of the noise that is picked up by the microphones. This work proposes a general framework in the time domain for the single and multiple microphone cases, from which it is very convenient to derive, study, and analyze all kind of optimal noise reduction filters. Not only that all known algorithms can be deduced from this approach, shedding more light on how they function, but new ones can be discovered as well.

A Conceptual Framework for Noise Reduction

Jacob Benesty,Jingdong Chen
A Conceptual Framework for Noise Reduction Book PDF

Author : Jacob Benesty,Jingdong Chen
Publisher : Springer
Page : 89 pages
File Size : 52,9 Mb
Release : 2015-03-31
Category : Technology & Engineering
ISBN : 9783319129556

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A Conceptual Framework for Noise Reduction by Jacob Benesty,Jingdong Chen Pdf

Though noise reduction and speech enhancement problems have been studied for at least five decades, advances in our understanding and the development of reliable algorithms are more important than ever, as they support the design of tailored solutions for clearly defined applications. In this work, the authors propose a conceptual framework that can be applied to the many different aspects of noise reduction, offering a uniform approach to monaural and binaural noise reduction problems, in the time domain and in the frequency domain, and involving a single or multiple microphones. Moreover, the derivation of optimal filters is simplified, as are the performance measures used for their evaluation.

Noise Reduction in Speech Processing

Jacob Benesty,Jingdong Chen,Yiteng Huang,Israel Cohen
Noise Reduction in Speech Processing Book PDF

Author : Jacob Benesty,Jingdong Chen,Yiteng Huang,Israel Cohen
Publisher : Springer Science & Business Media
Page : 236 pages
File Size : 44,7 Mb
Release : 2009-04-28
Category : Technology & Engineering
ISBN : 9783642002960

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Noise Reduction in Speech Processing by Jacob Benesty,Jingdong Chen,Yiteng Huang,Israel Cohen Pdf

Noise is everywhere and in most applications that are related to audio and speech, such as human-machine interfaces, hands-free communications, voice over IP (VoIP), hearing aids, teleconferencing/telepresence/telecollaboration systems, and so many others, the signal of interest (usually speech) that is picked up by a microphone is generally contaminated by noise. As a result, the microphone signal has to be cleaned up with digital signal processing tools before it is stored, analyzed, transmitted, or played out. This cleaning process is often called noise reduction and this topic has attracted a considerable amount of research and engineering attention for several decades. One of the objectives of this book is to present in a common framework an overview of the state of the art of noise reduction algorithms in the single-channel (one microphone) case. The focus is on the most useful approaches, i.e., filtering techniques (in different domains) and spectral enhancement methods. The other objective of Noise Reduction in Speech Processing is to derive all these well-known techniques in a rigorous way and prove many fundamental and intuitive results often taken for granted. This book is especially written for graduate students and research engineers who work on noise reduction for speech and audio applications and want to understand the subtle mechanisms behind each approach. Many new and interesting concepts are presented in this text that we hope the readers will find useful and inspiring.

Signal Enhancement with Variable Span Linear Filters

Jacob Benesty,Mads G. Christensen,Jesper R. Jensen
Signal Enhancement with Variable Span Linear Filters Book PDF

Author : Jacob Benesty,Mads G. Christensen,Jesper R. Jensen
Publisher : Springer
Page : 172 pages
File Size : 47,6 Mb
Release : 2016-02-05
Category : Technology & Engineering
ISBN : 9789812877390

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Signal Enhancement with Variable Span Linear Filters by Jacob Benesty,Mads G. Christensen,Jesper R. Jensen Pdf

This book introduces readers to the novel concept of variable span speech enhancement filters, and demonstrates how it can be used for effective noise reduction in various ways. Further, the book provides the accompanying Matlab code, allowing readers to easily implement the main ideas discussed. Variable span filters combine the ideas of optimal linear filters with those of subspace methods, as they involve the joint diagonalization of the correlation matrices of the desired signal and the noise. The book shows how some well-known filter designs, e.g. the minimum distortion, maximum signal-to-noise ratio, Wiener, and tradeoff filters (including their new generalizations) can be obtained using the variable span filter framework. It then illustrates how the variable span filters can be applied in various contexts, namely in single-channel STFT-based enhancement, in multichannel enhancement in both the time and STFT domains, and, lastly, in time-domain binaural enhancement. In these contexts, the properties of these filters are analyzed in terms of their noise reduction capabilities and desired signal distortion, and the analyses are validated and further explored in simulations.

Speech Enhancement in the Karhunen-Loeve Expansion Domain

Jacob Benesty,Jingdong Chen,Yiteng Huang
Speech Enhancement in the Karhunen Loeve Expansion Domain Book PDF

Author : Jacob Benesty,Jingdong Chen,Yiteng Huang
Publisher : Springer Nature
Page : 102 pages
File Size : 49,6 Mb
Release : 2022-05-31
Category : Technology & Engineering
ISBN : 9783031025600

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Speech Enhancement in the Karhunen-Loeve Expansion Domain by Jacob Benesty,Jingdong Chen,Yiteng Huang Pdf

This book is devoted to the study of the problem of speech enhancement whose objective is the recovery of a signal of interest (i.e., speech) from noisy observations. Typically, the recovery process is accomplished by passing the noisy observations through a linear filter (or a linear transformation). Since both the desired speech and undesired noise are filtered at the same time, the most critical issue of speech enhancement resides in how to design a proper optimal filter that can fully take advantage of the difference between the speech and noise statistics to mitigate the noise effect as much as possible while maintaining the speech perception identical to its original form. The optimal filters can be designed either in the time domain or in a transform space. As the title indicates, this book will focus on developing and analyzing optimal filters in the Karhunen-Loève expansion (KLE) domain. We begin by describing the basic problem of speech enhancement and the fundamental principles to solve it in the time domain. We then explain how the problem can be equivalently formulated in the KLE domain. Next, we divide the general problem in the KLE domain into four groups, depending on whether interframe and interband information is accounted for, leading to four linear models for speech enhancement in the KLE domain. For each model, we introduce signal processing measures to quantify the performance of speech enhancement, discuss the formation of different cost functions, and address the optimization of these cost functions for the derivation of different optimal filters. Both theoretical analysis and experiments will be provided to study the performance of these filters and the links between the KLE-domain and time-domain optimal filters will be examined. Table of Contents: Introduction / Problem Formulation / Optimal Filters in the Time Domain / Linear Models for Signal Enhancement in the KLE Domain / Optimal Filters in the KLE Domain with Model 1 / Optimal Filters in the KLE Domain with Model 2 / Optimal Filters in the KLE Domain with Model 3 / Optimal Filters in the KLE Domain with Model 4 / Experimental Study

A Perspective on Single-Channel Frequency-Domain Speech Enhancement

Jacob Benesty,Yiteng Huang
A Perspective on Single Channel Frequency Domain Speech Enhancement Book PDF

Author : Jacob Benesty,Yiteng Huang
Publisher : Springer Nature
Page : 101 pages
File Size : 55,8 Mb
Release : 2022-05-31
Category : Technology & Engineering
ISBN : 9783031025617

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A Perspective on Single-Channel Frequency-Domain Speech Enhancement by Jacob Benesty,Yiteng Huang Pdf

This book focuses on a class of single-channel noise reduction methods that are performed in the frequency domain via the short-time Fourier transform (STFT). The simplicity and relative effectiveness of this class of approaches make them the dominant choice in practical systems. Even though many popular algorithms have been proposed through more than four decades of continuous research, there are a number of critical areas where our understanding and capabilities still remain quite rudimentary, especially with respect to the relationship between noise reduction and speech distortion. All existing frequency-domain algorithms, no matter how they are developed, have one feature in common: the solution is eventually expressed as a gain function applied to the STFT of the noisy signal only in the current frame. As a result, the narrowband signal-to-noise ratio (SNR) cannot be improved, and any gains achieved in noise reduction on the fullband basis come with a price to pay, which is speech distortion. In this book, we present a new perspective on the problem by exploiting the difference between speech and typical noise in circularity and interframe self-correlation, which were ignored in the past. By gathering the STFT of the microphone signal of the current frame, its complex conjugate, and the STFTs in the previous frames, we construct several new, multiple-observation signal models similar to a microphone array system: there are multiple noisy speech observations, and their speech components are correlated but not completely coherent while their noise components are presumably uncorrelated. Therefore, the multichannel Wiener filter and the minimum variance distortionless response (MVDR) filter that were usually associated with microphone arrays will be developed for single-channel noise reduction in this book. This might instigate a paradigm shift geared toward speech distortionless noise reduction techniques. Table of Contents: Introduction / Problem Formulation / Performance Measures / Linear and Widely Linear Models / Optimal Filters with Model 1 / Optimal Filters with Model 2 / Optimal Filters with Model 3 / Optimal Filters with Model 4 / Experimental Study

Fundamentals of Signal Enhancement and Array Signal Processing

Jacob Benesty,Israel Cohen,Jingdong Chen
Fundamentals of Signal Enhancement and Array Signal Processing Book PDF

Author : Jacob Benesty,Israel Cohen,Jingdong Chen
Publisher : John Wiley & Sons
Page : 467 pages
File Size : 42,8 Mb
Release : 2017-12-18
Category : Technology & Engineering
ISBN : 9781119293125

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Fundamentals of Signal Enhancement and Array Signal Processing by Jacob Benesty,Israel Cohen,Jingdong Chen Pdf

A comprehensive guide to the theory and practice of signal enhancement and array signal processing, including matlab codes, exercises and instructor and solution manuals Systematically introduces the fundamental principles, theory and applications of signal enhancement and array signal processing in an accessible manner Offers an updated and relevant treatment of array signal processing with rigor and concision Features a companion website that includes presentation files with lecture notes, homework exercises, course projects, solution manuals, instructor manuals, and Matlab codes for the examples in the book

Acoustic Array Systems

Mingsian R. Bai,Jeong-Guon Ih,Jacob Benesty
Acoustic Array Systems Book PDF

Author : Mingsian R. Bai,Jeong-Guon Ih,Jacob Benesty
Publisher : John Wiley & Sons
Page : 546 pages
File Size : 40,7 Mb
Release : 2013-03-07
Category : Science
ISBN : 9780470828373

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Acoustic Array Systems by Mingsian R. Bai,Jeong-Guon Ih,Jacob Benesty Pdf

Presents a unified framework of far-field and near-field array techniques for noise source identification and sound field visualization, from theory to application. Acoustic Array Systems: Theory, Implementation, and Application provides an overview of microphone array technology with applications in noise source identification and sound field visualization. In the comprehensive treatment of microphone arrays, the topics covered include an introduction to the theory, far-field and near-field array signal processing algorithms, practical implementations, and common applications: vehicles, computing and communications equipment, compressors, fans, and household appliances, and hands-free speech. The author concludes with other emerging techniques and innovative algorithms. Encompasses theoretical background, implementation considerations and application know-how Shows how to tackle broader problems in signal processing, control, and transudcers Covers both farfield and nearfield techniques in a balanced way Introduces innovative algorithms including equivalent source imaging (NESI) and high-resolution nearfield arrays Selected code examples available for download for readers to practice on their own Presentation slides available for instructor use A valuable resource for Postgraduates and researchers in acoustics, noise control engineering, audio engineering, and signal processing.

Speech Enhancement

Jacob Benesty,Jesper Rindom Jensen,Mads Graesboll Christensen,Jingdong Chen
Speech Enhancement Book PDF

Author : Jacob Benesty,Jesper Rindom Jensen,Mads Graesboll Christensen,Jingdong Chen
Publisher : Elsevier
Page : 143 pages
File Size : 55,6 Mb
Release : 2014-01-04
Category : Technology & Engineering
ISBN : 9780128002537

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Speech Enhancement by Jacob Benesty,Jesper Rindom Jensen,Mads Graesboll Christensen,Jingdong Chen Pdf

Speech enhancement is a classical problem in signal processing, yet still largely unsolved. Two of the conventional approaches for solving this problem are linear filtering, like the classical Wiener filter, and subspace methods. These approaches have traditionally been treated as different classes of methods and have been introduced in somewhat different contexts. Linear filtering methods originate in stochastic processes, while subspace methods have largely been based on developments in numerical linear algebra and matrix approximation theory. This book bridges the gap between these two classes of methods by showing how the ideas behind subspace methods can be incorporated into traditional linear filtering. In the context of subspace methods, the enhancement problem can then be seen as a classical linear filter design problem. This means that various solutions can more easily be compared and their performance bounded and assessed in terms of noise reduction and speech distortion. The book shows how various filter designs can be obtained in this framework, including the maximum SNR, Wiener, LCMV, and MVDR filters, and how these can be applied in various contexts, like in single-channel and multichannel speech enhancement, and in both the time and frequency domains. First short book treating subspace approaches in a unified way for time and frequency domains, single-channel, multichannel, as well as binaural, speech enhancement Bridges the gap between optimal filtering methods and subspace approaches Includes original presentation of subspace methods from different perspectives

A Perspective on Single-Channel Frequency-Domain Speech Enhancement

Jacob Benesty,Yiteng Huang
A Perspective on Single Channel Frequency Domain Speech Enhancement Book PDF

Author : Jacob Benesty,Yiteng Huang
Publisher : Morgan & Claypool Publishers
Page : 111 pages
File Size : 47,9 Mb
Release : 2011-03-01
Category : Technology & Engineering
ISBN : 9781608456994

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A Perspective on Single-Channel Frequency-Domain Speech Enhancement by Jacob Benesty,Yiteng Huang Pdf

This book focuses on a class of single-channel noise reduction methods that are performed in the frequency domain via the short-time Fourier transform (STFT). The simplicity and relative effectiveness of this class of approaches make them the dominant choice in practical systems. Even though many popular algorithms have been proposed through more than four decades of continuous research, there are a number of critical areas where our understanding and capabilities still remain quite rudimentary, especially with respect to the relationship between noise reduction and speech distortion. All existing frequency-domain algorithms, no matter how they are developed, have one feature in common: the solution is eventually expressed as a gain function applied to the STFT of the noisy signal only in the current frame. As a result, the narrowband signal-to-noise ratio (SNR) cannot be improved, and any gains achieved in noise reduction on the fullband basis come with a price to pay, which is speech distortion. In this book, we present a new perspective on the problem by exploiting the difference between speech and typical noise in circularity and interframe self-correlation, which were ignored in the past. By gathering the STFT of the microphone signal of the current frame, its complex conjugate, and the STFTs in the previous frames, we construct several new, multiple-observation signal models similar to a microphone array system: there are multiple noisy speech observations, and their speech components are correlated but not completely coherent while their noise components are presumably uncorrelated. Therefore, the multichannel Wiener filter and the minimum variance distortionless response (MVDR) filter that were usually associated with microphone arrays will be developed for single-channel noise reduction in this book. This might instigate a paradigm shift geared toward speech distortionless noise reduction techniques.

Canonical Correlation Analysis in Speech Enhancement

Jacob Benesty,Israel Cohen
Canonical Correlation Analysis in Speech Enhancement Book PDF

Author : Jacob Benesty,Israel Cohen
Publisher : Springer
Page : 121 pages
File Size : 42,8 Mb
Release : 2017-08-31
Category : Technology & Engineering
ISBN : 9783319670201

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Canonical Correlation Analysis in Speech Enhancement by Jacob Benesty,Israel Cohen Pdf

This book focuses on the application of canonical correlation analysis (CCA) to speech enhancement using the filtering approach. The authors explain how to derive different classes of time-domain and time-frequency-domain noise reduction filters, which are optimal from the CCA perspective for both single-channel and multichannel speech enhancement. Enhancement of noisy speech has been a challenging problem for many researchers over the past few decades and remains an active research area. Typically, speech enhancement algorithms operate in the short-time Fourier transform (STFT) domain, where the clean speech spectral coefficients are estimated using a multiplicative gain function. A filtering approach, which can be performed in the time domain or in the subband domain, obtains an estimate of the clean speech sample at every time instant or time-frequency bin by applying a filtering vector to the noisy speech vector. Compared to the multiplicative gain approach, the filtering approach more naturally takes into account the correlation of the speech signal in adjacent time frames. In this study, the authors pursue the filtering approach and show how to apply CCA to the speech enhancement problem. They also address the problem of adaptive beamforming from the CCA perspective, and show that the well-known Wiener and minimum variance distortionless response (MVDR) beamformers are particular cases of a general class of CCA-based adaptive beamformers.

Fundamentals of Speech Enhancement

Jacob Benesty
Fundamentals of Speech Enhancement Book PDF

Author : Jacob Benesty
Publisher : Springer
Page : 106 pages
File Size : 53,5 Mb
Release : 2018-02-09
Category : Technology & Engineering
ISBN : 9783319745244

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Fundamentals of Speech Enhancement by Jacob Benesty Pdf

This book presents and develops several important concepts of speech enhancement in a simple but rigorous way. Many of the ideas are new; not only do they shed light on this old problem but they also offer valuable tips on how to improve on some well-known conventional approaches. The book unifies all aspects of speech enhancement, from single channel, multichannel, beamforming, time domain, frequency domain and time–frequency domain, to binaural in a clear and flexible framework. It starts with an exhaustive discussion on the fundamental best (linear and nonlinear) estimators, showing how they are connected to various important measures such as the coefficient of determination, the correlation coefficient, the conditional correlation coefficient, and the signal-to-noise ratio (SNR). It then goes on to show how to exploit these measures in order to derive all kinds of noise reduction algorithms that can offer an accurate and versatile compromise between noise reduction and speech distortion.

Image and Signal Processing

Abderrahim Elmoataz,Olivier Lezoray,Fathallah Nouboud,Driss Mammass,Jean Meunier
Image and Signal Processing Book PDF

Author : Abderrahim Elmoataz,Olivier Lezoray,Fathallah Nouboud,Driss Mammass,Jean Meunier
Publisher : Springer Science & Business Media
Page : 618 pages
File Size : 48,8 Mb
Release : 2010-06-09
Category : Computers
ISBN : 9783642136801

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Image and Signal Processing by Abderrahim Elmoataz,Olivier Lezoray,Fathallah Nouboud,Driss Mammass,Jean Meunier Pdf

This book constitutes the refereed proceedings of the 4th International Conference on Image and Signal Processing, ICISP 2010, held in Québec, Canada June 30 - July 2, 2010. The 69 revised full papers were carefully selected from 165 submissions. The papers presented are organized in topical sections on Image Filtering and Coding, Pattern Recognition, Biometry, Signal Processing, Video Coding and Processing, Watermarking and Document Processing, Computer Vision and Biomedical Applications.

Microphone Array Signal Processing

Jacob Benesty,Jingdong Chen,Yiteng Huang
Microphone Array Signal Processing Book PDF

Author : Jacob Benesty,Jingdong Chen,Yiteng Huang
Publisher : Springer Science & Business Media
Page : 245 pages
File Size : 53,7 Mb
Release : 2008-03-11
Category : Technology & Engineering
ISBN : 9783540786122

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Microphone Array Signal Processing by Jacob Benesty,Jingdong Chen,Yiteng Huang Pdf

In the past few years we have written and edited several books in the area of acousticandspeechsignalprocessing. Thereasonbehindthisendeavoristhat there were almost no books available in the literature when we ?rst started while there was (and still is) a real need to publish manuscripts summarizing the most useful ideas, concepts, results, and state-of-the-art algorithms in this important area of research. According to all the feedback we have received so far, we can say that we were right in doing this. Recently, several other researchers have followed us in this journey and have published interesting books with their own visions and perspectives. The idea of writing a book on Microphone Array Signal Processing comes from discussions we have had with many colleagues and friends. As a c- sequence of these discussions, we came up with the conclusion that, again, there is an urgent need for a monograph that carefully explains the theory and implementation of microphone arrays. While there are many manuscripts on antenna arrays from a narrowband perspective (narrowband signals and narrowband processing), the literature is quite scarce when it comes to s- sor arrays explained from a truly broadband perspective. Many algorithms for speech applications were simply borrowed from narrowband antenna - rays. However, a direct application of narrowband ideas to broadband speech processing may not be necessarily appropriate and can lead to many m- understandings.

Mechatronics and Automation Technology

J.-Y. Xu
Mechatronics and Automation Technology Book PDF

Author : J.-Y. Xu
Publisher : IOS Press
Page : 696 pages
File Size : 55,9 Mb
Release : 2024-02-27
Category : Technology & Engineering
ISBN : 9781643684833

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Mechatronics and Automation Technology by J.-Y. Xu Pdf

Mechatronics and automation technology has led to technological change and innovation in all engineering fields, affecting various disciplines, including machine technology, electronics, and computing. It plays a vital role in improving production efficiency, reducing energy consumption and improving product quality and safety, and will be central to the further advancement of technology and industry, bringing convenience and innovation to even more areas. This book presents the proceedings of ICMAT 2023, the 2nd International Conference on Mechatronics and Automation Technology, held as a virtual event on 27 October 2023. The aim of the conference was to provide a platform for scientists, scholars, engineers and researchers from universities and scientific institutes around the world to share the latest research achievements in mechatronics and automation technology, explore key challenges and research directions, and promote the development and application of theory and technology in this field. A total of 121 submissions were received for the conference, of which 77 were ultimately accepted after a rigorous peer-review process. The papers cover a wide range of topics falling within the scope of mechatronics and automation technology, including smart manufacturing; digital manufacturing; additive manufacturing; robotics; sensors; control; electronic and electrical engineering; intelligent systems; and automation technology, as well as other related fields. Providing an overview of recent developments in mechatronics and automation technology, the book will be of interest to all those working in the field.