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.
Download or read book Voice Compression and Communications written by Lajos Hanzo and published by Wiley-IEEE Press. This book was released on 2001-09-11 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up-to-date, expert coverage of topics in wireless voice communications Voice communication is the most important facet of mobile radio service. Even when the predicted surge of wireless data and Internet services becomes a reality, voice will remain the most natural means of human communication. Voice Compression and Communications details issues in wireless voice communications and treats compression, channel coding, and wireless transmission as a joint subject. Part I covers background material, whereas Part II provides detailed information on both proprietary and standardized analysis-by-synthesis codecs, including the speech codecs of virtually all existing wireline-based and wireless systems. Parts III and IV discuss mainly research-based wideband, audio, as well as very low-rate schemes likely to find their way into future standards. Voice Compression and Communications describes fundamental concepts in a non-mathematical way early in the book for those with only a background knowledge of signal processing and communications. More advanced readers will find detailed discussions of theoretical principles, future concepts, and solutions to various specific wireless voice communications problems.
Download or read book Voice Compression and Communications written by Lajos Hanzo and published by John Wiley & Sons. This book was released on 2001-01-01 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the era of third-generation (3G) wireless personal communications standards - despite the emergence of broadband access network standard proposals, the most important mobile radio services are still based on voice communications. Even when the predicted surge of wireless data and Internet services becomes a reality, voice remains the most natural means of human communication, although this may be delivered via the Internet, predominantly after compression. Voice Compression and Communications is dedicated to voice compression issues while covering the aspects of error resilience, coding delay, implementation complexity and bitrate, characterizing many different speech codes incorporated in source-sensitivity matched wireless transceivers. Following the overview of the recent history of speech compression and communications, the book provides the reader with an historical perspective, commencing with a rudimentary introduction to communications aspects, since the expected performance of various speech codes are studied in the context of a full wireless transceiver.
Download or read book Very low bit rate voice compression for mobile communications written by Fiona Clare Angharad Brooks and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Voice Compression Technology written by Eve Oppenheim and published by . This book was released on 1985 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wideband speech and audio compression for wireless communications written by Hee Thong How and published by . This book was released on 2001 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guide to Voice and Video over IP written by Lingfen Sun and published by Springer Science & Business Media. This book was released on 2013-01-12 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a review of the latest advances in speech and video compression, computer networking protocols, the assessment and monitoring of VoIP quality, and next generation network architectures for multimedia services. The book also concludes with three case studies, each presenting easy-to-follow step-by-step instructions together with challenging hands-on exercises. Features: provides illustrative worked examples and end-of-chapter problems; examines speech and video compression techniques, together with speech and video compression standards; describes the media transport protocols RTP and RTCP, as well as the VoIP signalling protocols SIP and SDP; discusses the concepts of VoIP quality of service and quality of experience; reviews next-generation networks based on the IP multimedia subsystem and mobile VoIP; presents case studies on building a VoIP system based on Asterisk, setting up a mobile VoIP system based on Open IMS and Android mobile, and analysing VoIP protocols and quality.
Download or read book Rate Distortion Bounds for Voice and Video written by Jerry D. Gibson and published by . This book was released on 2014 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous voice, still image, audio, and video compression standards have been developed over the last 25 years, and significant advances in the state of the art have been achieved. However, in the more than 50 years since Shannon's seminal 1959 paper, no rate distortion bounds for voice and video have been forthcoming. In this volume, we present the first rate distortion bounds for voice and video that actually lower bound the operational rate distortion performance of the best-performing voice and video codecs. The bounds indicate that improvements in rate distortion performance of approximately 50% over the best-performing voice and video codecs are possible. Research directions to improve the new bounds are discussed.
Download or read book Direct Broadcast Satellite Communications written by Donald C. Mead and published by Pearson Education. This book was released on 1999-09-20 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its higher power and superior video and audio quality, Direct Broadcast Satellite (DBS) communications is proliferating worldwide. Many new DBS systems are evolving and with the introduction of HDTV, DBS technology is predicted to become even more prevalent. Written by a leading DBS authority, this book is required reading for anyone involved in this burgeoning field. This comprehensive reference describes the history and structure of DBS systems, the regulatory environment, the subsystems that support it, and the underlying compression technology that makes it commercially feasible. Direct Broadcast Satellite Communications can be read as a broad overview of DBS systems or can serve as a detailed technical description. In particular, the author thoroughly explains how MPEG compression standards are used to implement modern satellite broadcast systems. You will find complete information on key topics such as: International and FCC regulations Radio frequency components of DBS systems, including the shaped reflector antenna Forward error correction, looking at block codes, interleaving, and Viterbi decoding The use of cryptography for conditional access to subscription services MPEG system and transport layer MPEG-2 video and audio compression Connecting terrestrial systems and DBS uplinks The Integrated Receiver Decoder In addition, the book explores future developments, including the Spaceway and the Global Broadcast Service, as well as the MPEG-4 compression standards. Numerous case studies involving DIRECTV(TM) and the European DVB standard appear throughout the book. For other books in this series, see http://www.awl.com/cseng/wirelessseries/
Download or read book A Practical Guide to Video and Audio Compression written by Cliff Wootton and published by CRC Press. This book was released on 2005-04-28 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn all about Codecs--how they work, as well as design and implementation with this comprehensive, easy-to-use guide to compression. After reading this book, you will be able to prepare and distribute professional audio and video on any platform including streamed to the web, broadcast on-air, stored in PVRs, Burned onto CD-ROMs or DVDs, delivered by broadband, or viewed in Kiosk applications, PDA devices, and mobile phones.
Download or read book Compression in Video and Audio written by John Watkinson and published by Butterworth-Heinemann. This book was released on 1995 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compression technology has been employed for a long time, but until recently the technology was too complex for everyday applications. However, compression has now reached the stage where it can economically be applied to video and audio systems on a wide scale. This book recognises the wide applications of compression by treating the subject from first principles without assuming any particular background for the reader. An introductory chapter is included which suggests some applications of compression and how it works in a simplified form. In addition a fundamentals chapter contains all of the background necessary to follow the rest of the book. Theory is balanced with a wide range of practical applications in transmission and recording and throughout the book the reader will find notes of caution and outlines of various pitfalls for the unwary. Various descriptions are also included of the kinds of impairments which can result from the misuse of compression. John Watkinson is an independent consultant in digital video, audio and data technology. he is a fellow of the AES and presents lectures, conference papers and training courses worldwide. he is the author of numerous other Focal press books, including the Art of Digital Audio, the Art of Digital Video (both now in their second edition) and The Art of Data Recording, An Introduction to Digital Audio, An Introduction to Digital Video, The Digital Videotape recorder and RDAT. he is also co-author, with Francis Rumsey of The Digital Interface Handbook. covers basic principles no unnecessary mathematics includes a wide range of practical applications
Download or read book Computer Speech written by Manfred R. Schroeder and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: New material treats such contemporary subjects as automatic speech recognition and speaker verification for banking by computer and privileged (medical, military, diplomatic) information and control access. The book also focuses on speech and audio compression for mobile communication and the Internet. The importance of subjective quality criteria is stressed. The book also contains introductions to human monaural and binaural hearing, and the basic concepts of signal analysis. Beyond speech processing, this revised and extended new edition of Computer Speech gives an overview of natural language technology and presents the nuts and bolts of state-of-the-art speech dialogue systems.
Download or read book Variable Data Rate Voice Encoder to Narrowband and Wideband Speech written by and published by . This book was released on 2007 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Past designs for many military communications systems were based upon specific radio links with fixed and limited channel capacities. Accordingly, many different voice compression algorithms, operating at various fixed rates, were implemented. While still being used today, these incompatible systems are an obstacle to interoperable communications. Emerging net-centric communications promise to provide connectivity to all military users but voice interoperability will still require compatible voice encoding as well as encryption for secure communications. This report details a Variable Data Rate (VDR) voice encoder that is designed to provide interoperable secure voice communications for net-centric users. While being backwards compatible with the Federal standard voice encoder (MELP) at 2400 bits per second (bps), it operates at a range of data rates up to 26,000 bps. Because the rate setting can be changed dynamically, the VDR encoder can provide efficient use of network bandwidth yet be interoperable at any and all rates simultaneously, and, with the proper encryption, even when secure.
Download or read book Compression for Multimedia written by Irina Bocharova and published by Cambridge University Press. This book was released on 2010 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a thorough theoretical understanding of lossy compression techniques and systems, plus key features, applications, implementation issues, and design trade-offs. It also includes detailed comparisons of multimedia standards and their common and distinguishing features, examples based on real multimedia data, end-of-chapter review problems, and the basics of lossless coding.
Download or read book Application of Voice Gender Conversion for Improved Speech Compression in Mobile Communications written by Kenneth Humphreys and published by . This book was released on 2002 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Signals and Images written by Rosângela Fernandes Coelho and published by CRC Press. This book was released on 2018-09-03 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: Signals and Images: Advances and Results in Speech, Estimation, Compression, Recognition, Filtering, and Processing cohesively combines contributions from field experts to deliver a comprehensive account of the latest developments in signal processing. These experts detail the results of their research related to audio and speech enhancement, acoustic image estimation, video compression, biometric recognition, hyperspectral image analysis, tensor decomposition with applications in communications, adaptive sparse-interpolated filtering, signal processing for power line communications, bio-inspired signal processing, seismic data processing, arithmetic transforms for spectrum computation, particle filtering in cooperative networks, three-dimensional television, and more. This book not only shows how signal processing theory is applied in current and emerging technologies, but also demonstrates how to tackle key problems such as how to enhance speech in the time domain, improve audio quality, and meet the desired electrical consumption target for controlling carbon emissions. Signals and Images: Advances and Results in Speech, Estimation, Compression, Recognition, Filtering, and Processing serves as a guide to the next generation of signal processing solutions for speech and video coding, hearing aid devices, big data processing, smartphones, smart digital communications, acoustic sensors, and beyond.
Download or read book Signal Compression written by N. Jayant and published by World Scientific. This book was released on 1997-05 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topic of the proposed book is signal compression. The compression (or low bit rate coding) of speech, audio, image and video signals is a key technology for rapidly emerging opportunities in multimedia products and services.The book contains chapters dedicated to the subtopics of data, speech, audio and visual signal coding, together with an introductory overview chapter on signal compression. The overview article summarizes current capabilities and future trends. The signal-specific chapters that follow focus on the latest technologies and coding standards, while including self-contained introductions to the respective signal domains. The authors of the book chapters are recognized experts in the field of signal processing, compression in particular.Signal compression dealing with both audio and visual signals technology has progressed very rapidly. The proposed book fills a clear void, and should prove to be a valuable reference, both to the practicing professional and to the relatively uninitiated student.
