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:

Download or read book Speech Coding written by Tom Bäckström and published by Springer. This book was released on 2017-03-29 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides scientific understanding of the most central techniques used in speech coding both for advanced students as well as professionals with a background in speech audio and or digital signal processing. It provides a clear connection between the Why’s?, How’s?, and What’s, such that the necessity, purpose and solutions provided by tools should be always within sight, as well as their strengths and weaknesses in each respect. Equivalently, this book sheds light on the following perspectives for each technology presented: Objective: What do we want to achieve and especially why is this goal important? Resource / Information: What information is available and how can it be useful? Resource / Platform: What kind of platforms are we working with and what are the capabilities/restrictions of those platforms? This includes properties such as computational, memory, acoustic and transmission capacity of devices used. Solutions: Which solutions have been proposed and how can they be used to reach the stated goals? Strengths and weaknesses: In which ways do the solutions fulfill the objectives and where are they insufficient? Are resources used efficiently? This book concentrates solely on code excited linear prediction and its derivatives since mainstream speech codecs are based on linear prediction It also concentrates exclusively on time domain techniques because frequency domain tools are to a large extent common with audio codecs.

Download or read book Advances in Digital Speech Transmission written by Prof Rainer Martin and published by John Wiley & Sons. This book was released on 2008-02-28 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: Speech processing and speech transmission technology are expanding fields of active research. New challenges arise from the 'anywhere, anytime' paradigm of mobile communications, the ubiquitous use of voice communication systems in noisy environments and the convergence of communication networks toward Internet based transmission protocols, such as Voice over IP. As a consequence, new speech coding, new enhancement and error concealment, and new quality assessment methods are emerging. Advances in Digital Speech Transmission provides an up-to-date overview of the field, including topics such as speech coding in heterogeneous communication networks, wideband coding, and the quality assessment of wideband speech. Provides an insight into the latest developments in speech processing and speech transmission, making it an essential reference to those working in these fields Offers a balanced overview of technology and applications Discusses topics such as speech coding in heterogeneous communications networks, wideband coding, and the quality assessment of the wideband speech Explains speech signal processing in hearing instruments and man-machine interfaces from applications point of view Covers speech coding for Voice over IP, blind source separation, digital hearing aids and speech processing for automatic speech recognition Advances in Digital Speech Transmission serves as an essential link between the basics and the type of technology and applications (prospective) engineers work on in industry labs and academia. The book will also be of interest to advanced students, researchers, and other professionals who need to brush up their knowledge in this field.

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.

Download or read book Digital Audio Forensics Fundamentals written by James Zjalic and published by CRC Press. This book was released on 2020-10-29 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital Audio Forensics Fundamentals offers an accessible introduction to both the theory and practical skills behind this emerging field of forensic science. Beginning with an overview of the history of the discipline, the reader is guided through forensic principles and key audio concepts, before being introduced to practical areas such as audio enhancement, audio authentication, and the presentation of reports. Covering all aspects of audio forensics from the capture to the courtroom, this book is pivotal reading for beginners entering the field, as well as experienced professionals looking to develop their knowledge of the practice.

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.

Download or read book Advances in Multimedia Information Processing PCM 2015 written by Yo-Sung Ho and published by Springer. This book was released on 2015-09-11 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two-volume proceedings LNCS 9314 and 9315, constitute the proceedings of the 16th Pacific-Rim Conference on Multimedia, PCM 2015, held in Gwangju, South Korea, in September 2015. The total of 138 full and 32 short papers presented in these proceedings was carefully reviewed and selected from 224 submissions. The papers were organized in topical sections named: image and audio processing; multimedia content analysis; multimedia applications and services; video coding and processing; multimedia representation learning; visual understanding and recognition on big data; coding and reconstruction of multimedia data with spatial-temporal information; 3D image/video processing and applications; video/image quality assessment and processing; social media computing; human action recognition in social robotics and video surveillance; recent advances in image/video processing; new media representation and transmission technologies for emerging UHD services.

Download or read book Spectral Band Replication Tool for Very Low Delay Audio Coding Applications written by Tobias Friedrich and published by . This book was released on 2007 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: In dieser Arbeit wird ein Werkzeug für Audio-Applikationen mit geringer Verzögerung vorgestellt. - Ein Ziel dieses Werkzeuges ist die weitere Reduktion der benötigten Bitrate für die Repräsentation von schon komprimierten Audiodaten, unter Verwendung eines frei wählbaren Audio-Codecs. Ein weiteres Ziel ist es, die algorithmische Verzögerung so gering wie möglich zu halten. Eine geringe Codierverzögerung ist essentiell, z.B. für Echtzeitanwendungen wie verteilte Musikproduktion unter Live-Bedingungen oder Telefonkonferenzen. Die in dieser Arbeit vorgeschlagene Low-Delay-SBR Methode nutzt Techniken, die ursprünglich für die Sprachcodierung entwickelt wurden und gehört zu den Bandbreitenerweiterungsmethoden, genauer gesagt zu denen mit Verwendung spektraler Faltung. Weiterhin arbeitet das SBR-Modul ausschließlich im Zeitbereich und verwendet Prädiktionsverfahren und adaptive Filter um eine zusätzliche Verzögerung zu vermeiden, die durch die Verwendung einer Filterbank verursacht werden kann.

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.

Download or read book Journal of the Audio Engineering Society written by Audio Engineering Society and published by . This book was released on 2005-07 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Directory of members" published as pt. 2 of Apr. 1954- issue.

Download or read book Principles of Digital Audio Sixth Edition written by Ken C. Pohlmann and published by McGraw Hill Professional. This book was released on 2010-10-06 with total page 817 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive guide to digital engineering--fully updated Gain a thorough understanding of digital audio tools, techniques, and practices from this completely revised and expanded resource. Written by industry pioneer and Audio Engineering Society Fellow Ken C. Pohlmann, Principles of Digital Audio, Sixth Edition, describes the technologies behind today's audio equipment in a clear, practical style. Covering basic theory to the latest technological advancements, the book explains how to apply digital conversion, processing, compression, storage, streaming, and transmission concepts. New chapters on Blu-ray, speech coding, and low bit-rate coding are also included in this bestselling guide. Learn about discrete time sampling, quantization, and signal processing Examine details of CD, DVD, and Blu-ray players and discs Encode and decode AAC, MP3, MP4, Dolby Digital, and other files Prepare content for distribution via the Internet and digital radio and television Learn the critical differences between music coding and speech coding Design low bit-rate codecs to optimize memory capacity while preserving fidelity Develop methodologies to evaluate the sound quality of music and speech files Study audio transmission via HDMI, VoIP, Wi-Fi, and Bluetooth Handle digital rights management, fingerprinting, and watermarking Understand how one-bit conversion and high-order noise shaping work

Download or read book Satellite Newsgathering written by Jonathan Higgins and published by Taylor & Francis. This book was released on 2012-08-06 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Praise for the first edition: "It is a wonderful source of information and has the merit of going straight to the subject, being technically precise although very easy to understand. There are numerous pictures, photographs, diagrams, which make the reading a real pleasure." --European Broadcasting Union Technical Review "The complexity of a satellite newsgathering system could be a four-month long college course with a high tuition rate and an enrolment number so large you have to watch your professor on a TV screen. Jonathan Higgins might have saved the independent learner a few attendance point deductions by fitting it into one book." --Satellite Broadband magazine An ideal introduction for anyone working, or interested, in satellite newsgathering (SNG). The new edition of this popular book builds upon the success of the first--an important and valuable work that is extermely easy to read, comprehensive in its treatment, and detailed where necessary. SNG used to be an immensely complex and expensive affair where broadcasting organizations were at the mercy of an expert who sat in a lonely corner, until needed. Things have changed--everyone in a global news organization needs to know about it now. This is not only because of the high costs of mistakes, but because now even non-technical journalists on the ground have to operate their own equipment. Learn the skills, basics of equipment, cutting edge technology and critical safety issues of satellite newsgathering.

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.

Download or read book Fast Fourier Transform Algorithms and Applications written by K.R. Rao and published by Springer Science & Business Media. This book was released on 2011-02-21 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an introduction to the principles of the fast Fourier transform. This book covers FFTs, frequency domain filtering, and applications to video and audio signal processing. As fields like communications, speech and image processing, and related areas are rapidly developing, the FFT as one of essential parts in digital signal processing has been widely used. Thus there is a pressing need from instructors and students for a book dealing with the latest FFT topics. This book provides thorough and detailed explanation of important or up-to-date FFTs. It also has adopted modern approaches like MATLAB examples and projects for better understanding of diverse FFTs.

Download or read book An Application of Spectral Translation and Spectral Envelope Extrapolation for High frequency Bandwidth Extension of Generic Audio Signals written by Alexai Kontsevoi and published by . This book was released on 2010 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scope of this work is to introduce a conceptually simple yet effective algorithm for blind high-frequency bandwidth extension of audio signals, a means of improving perceptual quality for sound which has been previously low-pass filtered or downsampled (typically due to storage considerations). The algorithm combines an application of the modulation theorem for discrete Fourier transform to regenerate the missing high-frequency end of the signal spectrum with a linear-regression-driven approach to shape the spectral envelope for the regenerated band. The results are graphically and acoustically compared to those obtained with existing audio restoration software for a variety of input signals. The source code and Windows binaries of the resulting algorithm implementation are also included.

Download or read book Sensory Evaluation of Sound written by Nick Zacharov and published by CRC Press. This book was released on 2018-12-07 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sensory Evaluation of Sound provides a detailed review of the latest sensory evaluation techniques, specifically applied to the evaluation of sound and audio. This three-part book commences with an introduction to the fundamental role of sound and hearing, which is followed by an overview of sensory evaluation methods and associated univariate and multivariate statistical analysis techniques. The final part of the book provides several chapters with concrete real-world applications of sensory evaluation ranging from telecommunications, hearing aids design and binaural sound, via the latest research in concert hall acoustics through to audio-visual interaction. Aimed at the engineer, researcher, university student or manager the book gives insight into the advanced methods for the sensory evaluation with many application examples. Introduces the fundamental of hearing and the value of sound Provides a firm theoretical basis for advanced techniques in sensory evaluation of sound that are then illustrated with concrete examples from university research through to industrial product development Includes chapters on sensory evaluation practices and methods as well as univariate and multivariate statistical analysis Six application chapters covering a wide range of concrete sensory evaluation study examples including insight into audio-visual assessment Includes data analysis with several associated downloadable datasets Provides extensive references to the existing research literature, text books and standards

Download or read book Voice and Audio Compression for Wireless Communications written by Lajos Hanzo and published by John Wiley & Sons. This book was released on 2008-06-05 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: Voice communications remains the most important facet of mobile radio services, which may be delivered over conventional fixed links, the Internet or wireless channels. This all-encompassing volume reports on the entire 50-year history of voice compression, on recent audio compression techniques and the protection as well as transmission of these signals in hostile wireless propagation environments. Audio and Voice Compression for Wireless and Wireline Communications, Second Edition is divided into four parts with Part I covering the basics, while Part II outlines the design of analysis-by-synthesis coding, including a 100-page chapter on virtually all existing standardised speech codecs. The focus of Part III is on wideband and audio coding as well as transmission. Finally, Part IV concludes the book with a range of very low rate encoding techniques, scanning a range of research-oriented topics. Fully updated and revised second edition of “Voice Compression and Communications”, expanded to cover Audio features Includes two new chapters, on narrowband and wideband AMR coding, and MPEG audio coding Addresses the new developments in the field of wideband speech and audio compression Covers compression, error resilience and error correction coding, as well as transmission aspects, including cutting-edge turbo transceivers Presents both the historic and current view of speech compression and communications. Covering fundamental concepts in a non-mathematical way before moving to detailed discussions of theoretical principles, future concepts and solutions to various specific wireless voice communication problems, this book will appeal to both advanced readers and those with a background knowledge of signal processing and communications.