Audio Bandwidth Extension

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Audio Bandwidth Extension

Author : Erik Larsen
Publisher : John Wiley & Sons
ISBN 13 : 0470858656
Total Pages : 312 pages
Book Rating : 4.4/5 (78 download)

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Book Synopsis Audio Bandwidth Extension by : Erik Larsen

Download or read book Audio Bandwidth Extension written by Erik Larsen and published by John Wiley & Sons. This book was released on 2005-04-08 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bandwidth extension (BWE) refers to various methods that increase either the perceived or real frequency spectrum (bandwidth) of audio signals. Such frequency extension is desirable if at some point the frequency content of the audio signal has been reduced, as can happen for example during recording, transmission or reproduction. This volume, significant in dealing exclusively with BWE, discusses applications to music and speech and places particular emphasis on signal processing techniques. Presents an all-encompassing approach to BWE by covering theory, applications and algorithms Reviews important concepts in psychoacoustics, signal processing and loudspeaker theory Develops the theory and implementation of BWE applied to low-frequency sound reproduction, perceptually coded audio, speech and noise abatement Includes a BWE patent overview Audio Bandwidth Extension pulls together recent developments in to a single volume and presents a coherent framework to the reader. Such an approach will have instant appeal to engineers, specialists, researchers and postgraduate students in the fields of audio, signal processing and speech.

High-Quality Audio Bandwidth Extension Method Based on LPC

Author : 吳子懿
Publisher :
ISBN 13 :
Total Pages : 71 pages
Book Rating : 4.:/5 (774 download)

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Book Synopsis High-Quality Audio Bandwidth Extension Method Based on LPC by : 吳子懿

Download or read book High-Quality Audio Bandwidth Extension Method Based on LPC written by 吳子懿 and published by . This book was released on 2006 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Bandwidth Extension Algorithms for Audio Quality Enhancement in Portable Audio Devices

Author : Arun Thirugnanasambandam
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (144 download)

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Book Synopsis Bandwidth Extension Algorithms for Audio Quality Enhancement in Portable Audio Devices by : Arun Thirugnanasambandam

Download or read book Bandwidth Extension Algorithms for Audio Quality Enhancement in Portable Audio Devices written by Arun Thirugnanasambandam and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low bitrate audio coding is an enabling technology for a number of applications such as digital radio, Internet streaming and mobile multimedia applications. Using perceptual codecs at low bitrates however has disadvantages. Below 128 kbps, the perceived audio quality deteriorates significantly because of the limited bandwidth and often creates annoying artifacts. Spectral Band Replication (SBR) is a technique that significantly improves the compression efficiency of perceptual audio codecs and the quality of audio, by reconstructing the high frequency components of an audio signal on the decoder side. The missing fundamental is a phenomenon exhibited by a sound when the overtones suggest a fundamental frequency but the sound lacks a component at the fundamental frequency itself. This concept could be used to create a low frequency pitch perception in small speakers, which do not actually have the capabilities to reproduce such low frequencies. This thesis is an attempt to combine these two techniques (SBR and missing fundamental) to improve the quality of audio in portable audio devices.

Introduction to Digital Filters

Author : Julius Orion Smith
Publisher : Julius Smith
ISBN 13 : 0974560715
Total Pages : 481 pages
Book Rating : 4.9/5 (745 download)

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Book Synopsis Introduction to Digital Filters by : Julius Orion Smith

Download or read book Introduction to Digital Filters written by Julius Orion Smith and published by Julius Smith. This book was released on 2007 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: A digital filter can be pictured as a "black box" that accepts a sequence of numbers and emits a new sequence of numbers. In digital audio signal processing applications, such number sequences usually represent sounds. For example, digital filters are used to implement graphic equalizers and other digital audio effects. This book is a gentle introduction to digital filters, including mathematical theory, illustrative examples, some audio applications, and useful software starting points. The theory treatment begins at the high-school level, and covers fundamental concepts in linear systems theory and digital filter analysis. Various "small" digital filters are analyzed as examples, particularly those commonly used in audio applications. Matlab programming examples are emphasized for illustrating the use and development of digital filters in practice.

Speech Enhancement

Author : Shoji Makino
Publisher : Springer Science & Business Media
ISBN 13 : 9783540240396
Total Pages : 432 pages
Book Rating : 4.2/5 (43 download)

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Book Synopsis Speech Enhancement by : Shoji Makino

Download or read book Speech Enhancement written by Shoji Makino and published by Springer Science & Business Media. This book was released on 2005-03-17 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: We live in a noisy world! In all applications (telecommunications, hands-free communications, recording, human-machine interfaces, etc) that require at least one microphone, the signal of interest is usually contaminated by noise and reverberation. As a result, the microphone signal has to be "cleaned" with digital signal processing tools before it is played out, transmitted, or stored. This book is about speech enhancement. Different well-known and state-of-the-art methods for noise reduction, with one or multiple microphones, are discussed. By speech enhancement, we mean not only noise reduction but also dereverberation and separation of independent signals. These topics are also covered in this book. However, the general emphasis is on noise reduction because of the large number of applications that can benefit from this technology. The goal of this book is to provide a strong reference for researchers, engineers, and graduate students who are interested in the problem of signal and speech enhancement. To do so, we invited well-known experts to contribute chapters covering the state of the art in this focused field.

Perceptual Audio Evaluation - Theory, Method and Application

Author : Søren Bech
Publisher : John Wiley & Sons
ISBN 13 : 0470869240
Total Pages : 462 pages
Book Rating : 4.4/5 (78 download)

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Book Synopsis Perceptual Audio Evaluation - Theory, Method and Application by : Søren Bech

Download or read book Perceptual Audio Evaluation - Theory, Method and Application written by Søren Bech and published by John Wiley & Sons. This book was released on 2007-01-11 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: As audio and telecommunication technologies develop, there is an increasing need to evaluate the technical and perceptual performance of these innovations. A growing number of new technologies (e.g. low bit-rate coding) are based on specific properties of the auditory system, which are often highly non-linear. This means that the auditory quality of such systems cannot be measured by traditional physical measures (such as distortion, frequency response etc.), but only by perceptual evaluations in the form of listening tests. Perceptual Audio Evaluation provides a comprehensive guide to the many variables that need to be considered before, during and after experiments. Including the selection of the content of the programme material to be reproduced, technical aspects of the production of the programme material, the experimental set-up including calibration, and the statistical planning of the experiment and subsequent analysis of the data. Perceptual Audio Evaluation: Provides a complete and accessible guide to the motives, theory and practical application of perceptual evaluation of reproduced sound. Discusses all the variables of perceptual evaluation, their control and their possible influence on the results. Covers in detail all international standards on the topic. Is illustrated throughout with tables, figures and worked solutions. Perceptual Audio Evaluation will appeal to audio and speech engineers as well as researchers in audio and speech laboratories. Postgraduate students in engineering or acoustics and undergraduate students studying psychoacoustics, speech audio processing and signal processing will also find this an essential reference.

Bandwidth Extension of Speech Using Perceptual Criteria

Author : Visar Berisha
Publisher : Springer Nature
ISBN 13 : 3031015215
Total Pages : 71 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Bandwidth Extension of Speech Using Perceptual Criteria by : Visar Berisha

Download or read book Bandwidth Extension of Speech Using Perceptual Criteria written by Visar Berisha and published by Springer Nature. This book was released on 2022-06-01 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bandwidth extension of speech is used in the International Telecommunication Union G.729.1 standard in which the narrowband bitstream is combined with quantized high-band parameters. Although this system produces high-quality wideband speech, the additional bits used to represent the high band can be further reduced. In addition to the algorithm used in the G.729.1 standard, bandwidth extension methods based on spectrum prediction have also been proposed. Although these algorithms do not require additional bits, they perform poorly when the correlation between the low and the high band is weak. In this book, two wideband speech coding algorithms that rely on bandwidth extension are developed. The algorithms operate as wrappers around existing narrowband compression schemes. More specifically, in these algorithms, the low band is encoded using an existing toll-quality narrowband system, whereas the high band is generated using the proposed extension techniques. The first method relies only on transmitted high-band information to generate the wideband speech. The second algorithm uses a constrained minimum mean square error estimator that combines transmitted high-band envelope information with a predictive scheme driven by narrowband features. Both algorithms make use of novel perceptual models based on loudness that determine optimum quantization strategies for wideband recovery and synthesis. Objective and subjective evaluations reveal that the proposed system performs at a lower average bit rate while improving speech quality when compared to other similar algorithms.

Frequency-domain Bandwidth Extension for Low-delay Audio Coding Applications

Author : Stanislaw Gorlow
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (882 download)

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Book Synopsis Frequency-domain Bandwidth Extension for Low-delay Audio Coding Applications by : Stanislaw Gorlow

Download or read book Frequency-domain Bandwidth Extension for Low-delay Audio Coding Applications written by Stanislaw Gorlow and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Speech Dereverberation

Author : Patrick A. Naylor
Publisher : Springer Science & Business Media
ISBN 13 : 1849960569
Total Pages : 388 pages
Book Rating : 4.8/5 (499 download)

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Book Synopsis Speech Dereverberation by : Patrick A. Naylor

Download or read book Speech Dereverberation written by Patrick A. Naylor and published by Springer Science & Business Media. This book was released on 2010-07-27 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Speech Dereverberation gathers together an overview, a mathematical formulation of the problem and the state-of-the-art solutions for dereverberation. Speech Dereverberation presents current approaches to the problem of reverberation. It provides a review of topics in room acoustics and also describes performance measures for dereverberation. The algorithms are then explained with mathematical analysis and examples that enable the reader to see the strengths and weaknesses of the various techniques, as well as giving an understanding of the questions still to be addressed. Techniques rooted in speech enhancement are included, in addition to a treatment of multichannel blind acoustic system identification and inversion. The TRINICON framework is shown in the context of dereverberation to be a generalization of the signal processing for a range of analysis and enhancement techniques. Speech Dereverberation is suitable for students at masters and doctoral level, as well as established researchers.

Sound Reproduction

Author : Floyd E. Toole
Publisher : Routledge
ISBN 13 : 1317415094
Total Pages : 956 pages
Book Rating : 4.3/5 (174 download)

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Book Synopsis Sound Reproduction by : Floyd E. Toole

Download or read book Sound Reproduction written by Floyd E. Toole and published by Routledge. This book was released on 2017-07-28 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms, Third Edition explains the physical and perceptual processes that are involved in sound reproduction and demonstrates how to use the processes to create high-quality listening experiences in stereo and multichannel formats. Understanding the principles of sound production is necessary to achieve the goals of sound reproduction in spaces ranging from recording control rooms and home listening rooms to large cinemas. This revision brings new science-based perspectives on the performance of loudspeakers, room acoustics, measurements and equalization, all of which need to be appropriately used to ensure the accurate delivery of music and movie sound tracks from creators to listeners. The robust website (www.routledge.com/cw/toole) is the perfect companion to this necessary resource.

Video, Speech, and Audio Signal Processing and Associated Standards

Author : Vijay Madisetti
Publisher : CRC Press
ISBN 13 : 1420046098
Total Pages : 616 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Video, Speech, and Audio Signal Processing and Associated Standards by : Vijay Madisetti

Download or read book Video, Speech, and Audio Signal Processing and Associated Standards written by Vijay Madisetti and published by CRC Press. This book was released on 2018-09-03 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now available in a three-volume set, this updated and expanded edition of the bestselling The Digital Signal Processing Handbook continues to provide the engineering community with authoritative coverage of the fundamental and specialized aspects of information-bearing signals in digital form. Encompassing essential background material, technical details, standards, and software, the second edition reflects cutting-edge information on signal processing algorithms and protocols related to speech, audio, multimedia, and video processing technology associated with standards ranging from WiMax to MP3 audio, low-power/high-performance DSPs, color image processing, and chips on video. Drawing on the experience of leading engineers, researchers, and scholars, the three-volume set contains 29 new chapters that address multimedia and Internet technologies, tomography, radar systems, architecture, standards, and future applications in speech, acoustics, video, radar, and telecommunications. This volume, Video, Speech, and Audio Signal Processing and Associated Standards, provides thorough coverage of the basic foundations of speech, audio, image, and video processing and associated applications to broadcast, storage, search and retrieval, and communications.

Introduction to Digital Audio Coding and Standards

Author : Marina Bosi
Publisher : Springer Science & Business Media
ISBN 13 : 1461503272
Total Pages : 443 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis Introduction to Digital Audio Coding and Standards by : Marina Bosi

Download or read book Introduction to Digital Audio Coding and Standards written by Marina Bosi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Digital Audio Coding and Standards provides a detailed introduction to the methods, implementations, and official standards of state-of-the-art audio coding technology. In the book, the theory and implementation of each of the basic coder building blocks is addressed. The building blocks are then fit together into a full coder and the reader is shown how to judge the performance of such a coder. Finally, the authors discuss the features, choices, and performance of the main state-of-the-art coders defined in the ISO/IEC MPEG and HDTV standards and in commercial use today. The ultimate goal of this book is to present the reader with a solid enough understanding of the major issues in the theory and implementation of perceptual audio coders that they are able to build their own simple audio codec. There is no other source available where a non-professional has access to the true secrets of audio coding.

Bandwidth Extension of Speech Signals

Author : Bernd Iser
Publisher : Springer Science & Business Media
ISBN 13 : 9780387688992
Total Pages : 200 pages
Book Rating : 4.6/5 (889 download)

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Book Synopsis Bandwidth Extension of Speech Signals by : Bernd Iser

Download or read book Bandwidth Extension of Speech Signals written by Bernd Iser and published by Springer Science & Business Media. This book was released on 2008-07-15 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bandwidth Extension of Speech Signals describes the theory and methods for quality enhancement of clean speech signals and distorted speech signals such as those that have undergone a band limitation, for instance, in a telephone network. Problems and the respective solutions are discussed for the different approaches. The different approaches are evaluated and a real-time implementation of the most promising approach is presented. The book includes topics related to speech coding, pattern- / speech recognition, speech enhancement, statistics and digital signal processing in general.

Parametric Time-Frequency Domain Spatial Audio

Author : Ville Pulkki
Publisher : John Wiley & Sons
ISBN 13 : 1119252598
Total Pages : 410 pages
Book Rating : 4.1/5 (192 download)

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Book Synopsis Parametric Time-Frequency Domain Spatial Audio by : Ville Pulkki

Download or read book Parametric Time-Frequency Domain Spatial Audio written by Ville Pulkki and published by John Wiley & Sons. This book was released on 2017-12-26 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide that addresses the theory and practice of spatial audio This book provides readers with the principles and best practices in spatial audio signal processing. It describes how sound fields and their perceptual attributes are captured and analyzed within the time-frequency domain, how essential representation parameters are coded, and how such signals are efficiently reproduced for practical applications. The book is split into four parts starting with an overview of the fundamentals. It then goes on to explain the reproduction of spatial sound before offering an examination of signal-dependent spatial filtering. The book finishes with coverage of both current and future applications and the direction that spatial audio research is heading in. Parametric Time-frequency Domain Spatial Audio focuses on applications in entertainment audio, including music, home cinema, and gaming—covering the capturing and reproduction of spatial sound as well as its generation, transduction, representation, transmission, and perception. This book will teach readers the tools needed for such processing, and provides an overview to existing research. It also shows recent up-to-date projects and commercial applications built on top of the systems. Provides an in-depth presentation of the principles, past developments, state-of-the-art methods, and future research directions of spatial audio technologies Includes contributions from leading researchers in the field Offers MATLAB codes with selected chapters An advanced book aimed at readers who are capable of digesting mathematical expressions about digital signal processing and sound field analysis, Parametric Time-frequency Domain Spatial Audio is best suited for researchers in academia and in the audio industry.

ICASSP 2021 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Author : IEEE Staff
Publisher :
ISBN 13 : 9781728176062
Total Pages : pages
Book Rating : 4.1/5 (76 download)

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Book Synopsis ICASSP 2021 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) by : IEEE Staff

Download or read book ICASSP 2021 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) written by IEEE Staff and published by . This book was released on 2021-06-06 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: World s largest and most comprehensive technical conference on signal processing and its applications Topics include but are not limited to Audio and acoustic signal processing Bio imaging and signal processing Design & implementation of signal processing systems Image, video & multidimensional signal processing Industry technology tracks Information forensics and security Machine learning for signal processing Multimedia signal processing Sensor array & multichannel signal processing Signal processing education Signal processing for Big Data Signal processing for communications & networking Signal processing for the Internet of Things Signal processing theory & methods Speech processing Spoken language processing

High Performance Browser Networking

Author : Ilya Grigorik
Publisher : "O'Reilly Media, Inc."
ISBN 13 : 1449344720
Total Pages : 420 pages
Book Rating : 4.4/5 (493 download)

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Book Synopsis High Performance Browser Networking by : Ilya Grigorik

Download or read book High Performance Browser Networking written by Ilya Grigorik and published by "O'Reilly Media, Inc.". This book was released on 2013-09-11 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: How prepared are you to build fast and efficient web applications? This eloquent book provides what every web developer should know about the network, from fundamental limitations that affect performance to major innovations for building even more powerful browser applications—including HTTP 2.0 and XHR improvements, Server-Sent Events (SSE), WebSocket, and WebRTC. Author Ilya Grigorik, a web performance engineer at Google, demonstrates performance optimization best practices for TCP, UDP, and TLS protocols, and explains unique wireless and mobile network optimization requirements. You’ll then dive into performance characteristics of technologies such as HTTP 2.0, client-side network scripting with XHR, real-time streaming with SSE and WebSocket, and P2P communication with WebRTC. Deliver superlative TCP, UDP, and TLS performance Speed up network performance over 3G/4G mobile networks Develop fast and energy-efficient mobile applications Address bottlenecks in HTTP 1.x and other browser protocols Plan for and deliver the best HTTP 2.0 performance Enable efficient real-time streaming in the browser Create efficient peer-to-peer videoconferencing and low-latency applications with real-time WebRTC transports

Bandwidth Extension of Speech Signals

Author : Bernd Iser
Publisher : Springer
ISBN 13 : 9780387688985
Total Pages : 190 pages
Book Rating : 4.6/5 (889 download)

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Book Synopsis Bandwidth Extension of Speech Signals by : Bernd Iser

Download or read book Bandwidth Extension of Speech Signals written by Bernd Iser and published by Springer. This book was released on 2008-09-02 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bandwidth Extension of Speech Signals describes the theory and methods for quality enhancement of clean speech signals and distorted speech signals such as those that have undergone a band limitation, for instance, in a telephone network. Problems and the respective solutions are discussed for the different approaches. The different approaches are evaluated and a real-time implementation of the most promising approach is presented. The book includes topics related to speech coding, pattern- / speech recognition, speech enhancement, statistics and digital signal processing in general.