Download or read book Quantization and Transforms for Distributed Source Coding written by David Rebollo-Monedero and published by . This book was released on 2007 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental results for Wyner-Ziv quantization of Gaussian sources show consistency between the rate-distortion performance of the quantizers found by our extension of the Lloyd algorithm, and the performance predicted by the high-rate theory presented. Implementations of distributed transform codecs of clean Gaussian data and noisy images experimentally support the rate-distortion improvement due to the introduction of the discrete cosine transform, predicted in the theory developed.
Download or read book Distributed Source Coding written by Pier Luigi Dragotti and published by Academic Press. This book was released on 2009-02-24 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advent of wireless sensor technology and ad-hoc networks has made DSC a major field of interest. Edited and written by the leading players in the field, this book presents the latest theory, algorithms and applications, making it the definitive reference on DSC for systems designers and implementers, researchers, and graduate students. This book gives a clear understanding of the performance limits of distributed source coders for specific classes of sources and presents the design and application of practical algorithms for realistic scenarios. Material covered includes the use of standard channel codes, such as LDPC and Turbo codes, to DSC, and discussion of the suitability of compressed sensing for distributed compression of sparse signals. Extensive applications are presented and include distributed video coding, microphone arrays and securing biometric data. Clear explanation of the principles of distributed source coding (DSC), a technology that has applications in sensor networks, ad-hoc networks, and distributed wireless video systems for surveillance Edited and written by the leading players in the field, providing a complete and authoritative reference Contains all the latest theory, practical algorithms for DSC design and the most recently developed applications
Download or read book Distributed Multiple Description Coding written by Huihui Bai and published by Springer Science & Business Media. This book was released on 2011-11-19 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines distributed video coding (DVC) and multiple description coding (MDC), two novel techniques designed to address the problems of conventional image and video compression coding. Covering all fundamental concepts and core technologies, the chapters can also be read as independent and self-sufficient, describing each methodology in sufficient detail to enable readers to repeat the corresponding experiments easily. Topics and features: provides a broad overview of DVC and MDC, from the basic principles to the latest research; covers sub-sampling based MDC, quantization based MDC, transform based MDC, and FEC based MDC; discusses Sleplian-Wolf coding based on Turbo and LDPC respectively, and comparing relative performance; includes original algorithms of MDC and DVC; presents the basic frameworks and experimental results, to help readers improve the efficiency of MDC and DVC; introduces the classical DVC system for mobile communications, providing the developmental environment in detail.
Download or read book Distributed Lossy Source Coding Using BCH DFT Codes written by Mojtaba Vaezi and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Distributed source coding, separate encoding (compression) and joint decoding of statistically dependent sources, arises in an increasing number of applications like sensor networks and multiview video coding. Many of those applications are highly interactive, requiring the development of low-delay, energy-limited communication and computing schemes. Currently, this compression is performed by using capacity-approaching binary channel codes. As a natural extension, distributed lossy source coding is realized by cascading a quantizer and Slepian-Wolf coding in the binary domain. Despite big strides in practical distributed source coding techniques, this problem is still demanding in terms of processing power, bandwidth, and delay.In this dissertation, we develop a new framework for distributed lossy source coding, in which we use real-number codes for binning. Specifically, we use a class of Bose-Chaudhuri-Hocquenghem (BCH) codes in the real/complex field known as the discrete Fourier transform (DFT) codes. Contrary to the conventional scheme, we first compress the continuous-valued sources and then quantize them. The new scheme exploits the correlation between continuous-valued sources, rather than quantized ones, which is more accurate. Also, by using short BCH-DFT codes, it reduces the complexity and delay and offers the potential to avoid the problems of the conventional quantization and binning approach, with relatively simple encoder/decoder.We propose both syndrome- and parity-based schemes, and we extend the parity-based scheme to distributed joint source-channel coding based on a single DFT code. Further, to adapt to uncertainty in the degree of statistical dependence between the sources, we construct rate-adaptive BCH-DFT codes. This allows the encoder to switch flexibly between encoding sample rates, if the degree of statistical dependence varies. The construction of rate-adaptive codes is based on transmission of additional syndrome samples and a simple extension of the subspace-based decoding.Another major contribution of this dissertation is to generalize the encoding/decoding of BCH-DFT codes. We prove that the parity frequencies of a BCH-DFT code, or equivalently the zeros of codewords in the frequency domain, are not required to be adjacent; we provide the decoding algorithm as well. This offers flexibility in constructing BCH-DFT codes and further improvement in the decoding which can be exploited in channel coding as well." --
Download or read book Network Source Coding written by Jun Chen and published by . This book was released on 2006 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wireless Sensor Networks written by Koen Langendoen and published by Springer. This book was released on 2007-04-27 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the 4th European Workshop on Wireless Sensor Networks, EWSN 2007, held in Delft, The Netherlands in January 2007. The 22 revised full papers presented were carefully reviewed and selected from 164 submissions. The papers are organized in topical sections on networking, tracking, algorithms, applications and support, medium access control, os and tools, as well as localization.
Download or read book Wavelet Image and Video Compression written by Pankaj N. Topiwala and published by Springer Science & Business Media. This book was released on 2006-04-18 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exciting new development has taken place in the digital era that has captured the imagination and talent of researchers around the globe - wavelet image compression. This technology has deep roots in theories of vision, and promises performance improvements over all other compression methods, such as those based on Fourier transforms, vectors quantizers, fractals, neural nets, and many others. It is this revolutionary new technology that is presented in Wavelet Image and Video Compression, in a form that is accessible to the largest audience possible. Wavelet Image and Video Compression is divided into four parts. Part I, Background Material, introduces the basic mathematical structures that underly image compression algorithms with the intention of providing an easy introduction to the mathematical concepts that are prerequisites for the remainder of the book. It explains such topics as change of bases, scalar and vector quantization, bit allocation and rate-distortion theory, entropy coding, the discrete-cosine transform, wavelet filters and other related topics. Part II, Still Image Coding, presents a spectrum of wavelet still image coding techniques. Part III, Special Topics in Still Image Coding, provides a variety of example coding schemes with a special flavor in either approach or application domain. Part IV, Video Coding, examines wavelet and pyramidal coding techniques for video data. Wavelet Image and Video Compression serves as an excellent reference and may be used as a text for advanced courses covering the subject.
Download or read book Elements of Multimedia written by Sreeparna Banerjee and published by CRC Press. This book was released on 2019-04-30 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elements of Multimedia presents a systematic introduction and integrated overview of the state-of-the-art innovations that make Multimedia a rapidly evolving technology in the digital domain. This book is also an invaluable resource for applied researchers. Some of the salient features of the book include: Overview of recent additions to multimedia like New Media, Digital Media, Social Media and Mobile Media. This book provides a starting point for researchers wishing to pursue research in Multimedia. Discussions on advances in Web Technology, particularly Web 2.0, as well as Multimedia Applications. Detailed descriptions on different Multimedia elements like text, graphics, images, audio, video and animation. Introduction to the concepts of data compression. Various aspects of multimedia presentations. Multimedia storage hardware. Databases for Multimedia data storage and indexing schemes for accessing Multimedia data. Multimedia communications and networking issues. Each chapter ends with a review of the topics covered and a set of review questions to enable the student to go back to the chapter and recapitulate the subject matter. Answers to the Multiple-Choice Questions (MCQ) are provided at the end of the book. Solutions of problems are also provided.
Download or read book Near Capacity Variable Length Coding written by Lajos Hanzo and published by John Wiley & Sons. This book was released on 2012-01-03 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent developments such as the invention of powerful turbo-decoding and irregular designs, together with the increase in the number of potential applications to multimedia signal compression, have increased the importance of variable length coding (VLC). Providing insights into the very latest research, the authors examine the design of diverse near-capacity VLC codes in the context of wireless telecommunications. The book commences with an introduction to Information Theory, followed by a discussion of Regular as well as Irregular Variable Length Coding and their applications in joint source and channel coding. Near-capacity designs are created using Extrinsic Information Transfer (EXIT) chart analysis. The latest techniques are discussed, outlining radical concepts such as Genetic Algorithm (GA) aided construction of diverse VLC codes. The book concludes with two chapters on VLC-based space-time transceivers as well as on frequency-hopping assisted schemes, followed by suggestions for future work on the topic. Surveys the historic evolution and development of VLCs Discusses the very latest research into VLC codes Introduces the novel concept of Irregular VLCs and their application in joint-source and channel coding
Download or read book Distributed Source Coding written by Shuang Wang and published by John Wiley & Sons. This book was released on 2017-03-20 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distributed source coding is one of the key enablers for efficient cooperative communication. The potential applications range from wireless sensor networks, ad-hoc networks, and surveillance networks, to robust low-complexity video coding, stereo/Multiview video coding, HDTV, hyper-spectral and multispectral imaging, and biometrics. The book is divided into three sections: theory, algorithms, and applications. Part one covers the background of information theory with an emphasis on DSC; part two discusses designs of algorithmic solutions for DSC problems, covering the three most important DSC problems: Slepian-Wolf, Wyner-Ziv, and MT source coding; and part three is dedicated to a variety of potential DSC applications. Key features: Clear explanation of distributed source coding theory and algorithms including both lossless and lossy designs. Rich applications of distributed source coding, which covers multimedia communication and data security applications. Self-contained content for beginners from basic information theory to practical code implementation. The book provides fundamental knowledge for engineers and computer scientists to access the topic of distributed source coding. It is also suitable for senior undergraduate and first year graduate students in electrical engineering; computer engineering; signal processing; image/video processing; and information theory and communications.
Download or read book Joint Source Channel Coding written by Andres Kwasinski and published by John Wiley & Sons. This book was released on 2022-11-08 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Joint Source-Channel Coding Consolidating knowledge on Joint Source-Channel Coding (JSCC), this book provides an indispensable resource on a key area of performance enhancement for communications networks Presenting in one volume the key theories, concepts and important developments in the area of Joint Source-Channel Coding (JSCC), this book provides the fundamental material needed to enhance the performance of digital and wireless communication systems and networks. It comprehensively introduces JSCC technologies for communications systems, including coding and decoding algorithms, and emerging applications of JSCC in current wireless communications. The book covers the full range of theoretical and technical areas before concluding with a section considering recent applications and emerging designs for JSCC. A methodical reference for academic and industrial researchers, development engineers, system engineers, system architects and software engineers, this book: Explains how JSCC leads to high performance in communication systems and networks Consolidates key material from multiple disparate sources Is an ideal reference for graduate-level courses on digital or wireless communications, as well as courses on information theory Targets professionals involved with digital and wireless communications and networking systems
Download or read book Digital Image Processing Techniques written by Michael P. Ekstrom and published by Academic Press. This book was released on 2012-12-02 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital Image Processing Techniques is a state-of-the-art review of digital image processing techniques, with emphasis on the processing approaches and their associated algorithms. A canonical set of image processing problems that represent the class of functions typically required in most image processing applications is presented. Each chapter broadly addresses the problem being considered; the best techniques for this particular problem and how they work; their strengths and limitations; and how the techniques are actually implemented as well as their computational aspects. Comprised of eight chapters, this volume begins with a discussion on processing techniques associated with the following tasks: image enhancement, restoration, detection and estimation, reconstruction, and analysis, along with image data compression and image spectral estimation. The second section describes hardware and software systems for digital image processing. Aspects of commercially available systems that combine both processing and display functions are considered, as are future prospects for their technological and architectural evolution. The specifics of system design trade-offs are explicitly presented in detail. This book will be of interest to students, practitioners, and researchers in various disciplines including digital signal processing, computer science, statistical communications theory, control systems, and applied physics.
Download or read book Visual Media Coding and Transmission written by Ahmet Kondoz and published by John Wiley & Sons. This book was released on 2009-04-01 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state-of-the-art in visual media coding and transmission Visual Media Coding and Transmission is an output of VISNET II NoE, which is an EC IST-FP6 collaborative research project by twelve esteemed institutions from across Europe in the fields of networked audiovisual systems and home platforms. The authors provide information that will be essential for the future study and development of visual media communications technologies. The book contains details of video coding principles, which lead to advanced video coding developments in the form of Scalable Coding, Distributed Video Coding, Non-Normative Video Coding Tools and Transform Based Multi-View Coding. Having detailed the latest work in Visual Media Coding, networking aspects of Video Communication is detailed. Various Wireless Channel Models are presented to form the basis for both link level quality of service (QoS) and cross network transmission of compressed visual data. Finally, Context-Based Visual Media Content Adaptation is discussed with some examples. Key Features: Contains the latest advances in this important field covered by VISNET II NoE Addresses the latest multimedia signal processing and coding algorithms Covers all important advance video coding techniques, scalable and multiple description coding, distributed video coding and non-normative tools Discusses visual media networking with various wireless channel models QoS methods by way of link adaptation techniques are detailed with examples Presents a visual media content adaptation platform, which is both context aware and digital rights management enabled Contains contributions from highly respected academic and industrial organizations Visual Media Coding and Transmission will benefit researchers and engineers in the wireless communications and signal processing fields. It will also be of interest to graduate and PhD students on media processing, coding and communications courses.
Download or read book Low delay Distributed Source Coding written by Ozgun Bursalioglu and published by . This book was released on 2006 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Slepian Wolf Coded Nested Quantization SEC NQ for Wyner Ziv Coding written by Zhixin Liu and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wyner-Ziv coding problem exploits the correlation between two signals (one is the source and the other is the side information) and thus makes it possible to encode the source signal alone and to decode it jointly with the help of the side information at the decoder. Nested lattice quantization provides a practical scheme for Wyner-Ziv coding. We examine the high-rate performance of nested lattice quantizers and give the theoretical performance for general continuous sources. Based on our analysis, a new practical Wyner-Ziv coding scheme called Slepian-Wolf coded nested lattice quantization (SWC-NQ) is proposed. Theoretical analysis shows that for the quadratic Gaussian case and at high rate, SWC-NQ performs the same as conventional entropy-coded lattice quantization with the side information available at both the encoder and the decoder. Practical designs of one- and two-dimensional nested lattice uantizers, together with multi-level LDPC codes for Slepian-Wolf coding, give performance close to the theoretical limits of SWC-NQ for the quadratic Gaussian case. Furthermore, we apply our code design in cooperative networks as practical implementations of the cooperative strategies. In cooperative networks, relaying is an essential component to gain the cooperative diversity. Following the latest development in practical distributed source-channel coding, we studied Compress-forward (CF) coding with BPSK modulation for the relay channel, where Wyner-Ziv coding is applied at the relay to exploit the joint statistics between signals at the relay and the destination. Practical issues such as quantizer design and selection of channel code parameters are discussed in detail. Simulation results show that, by using LDPC codes for error protection at the source and nested scalar quantization and IRA codes for Wyner-Ziv coding (or more precisely distributed joint source-channel coding) at the relay, our practical implementation comes within only 1.6-3 dB from the theoretical limit of CF for the Gaussian relay channel with BPSK modulation. Summarily, my research work involves the development (theoretical analysis and practical design) of Wyner-Ziv coding, and its application in cooperative networks for cooperative diversity.
Download or read book Beyond Traditional Transform Coding written by Vivek K. Goyal and published by . This book was released on 1998 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Source Coding written by Thomas Wiegand and published by Now Publishers Inc. This book was released on 2011-01-05 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Source Coding is the first part of the two-part monograph Fundamentals of Source and Video Coding by Wiegand and Schwarz. It is devoted to the fundamental subject of source coding. Source Coding is a standalone text and also forms the basis for the second part, which describes the application of sources coding techniques to video coding. Based on a simple and accessible presentation of the fundamentals of information and rate distortion theory, the authors describe the subjects of entropy coding and quantization as well as predictive and transform coding. All relevant source coding results that are required for the understanding of today's video compression algorithms are established. The emphasis is on source coding techniques that have become relevant for video coding in recent years. To illustrate the concepts and efficiency of the basic sources coding techniques, the authors provide numerous examples and experimental results for simple model sources. In addition to widely known results, the text also offers some elements that are new or rarely covered in references on source coding today, which include: Huffman coding for variable-length symbol sequences and PIPE coding, scalar quantization in combination with advanced entropy coding techniques, a simple model for the rate distortion performance of entropy-constrained scalar quantization for Gaussian sources that is valid over the entire bit rate range, a proof for the optimality of the Karhunen-Loève transform for Gaussian sources. Source Coding is suitable as a primary text for courses on this subject. It can also be used as a resource for teaching and as a comprehensive reference for professional engineers and academic researches.
