Signal Processing and its Applications – serie

Personal multimedia communication is the major growth area in engineering today with many people across the world in industry and academia working on the design of future generations of mobile radio systems and source coding methods. Before multimedia applications can be truly successful in mobile environments, many technologically demanding problems must be resolved. In order to provide the user with a suitable end-to-end service for multimedia applications, complex systems, interfaces and coding schemes need to be developed. In mobile multimedia, the air interface bandwidth requirements are likely to be dominated by the needs of one key service: video. Even with today's most aggressive compression algorithms, the needs of video exceed the bandwidth available with existing mobile connections. Although available bandwidth will increase, with the introduction of UMTS and local services based on wireless LANs (such as HiperLan), it is clear that advances in radio technology and air interface design must go hand in hand with innovations in source and channel coding.

The purpose of this book is to present an integrated view of advanced radio systems, network architectures and source coding that demonstrates the state-of-the-art as well as future directions in this rapidly developing field. The book acts as a repository of ideas, design examples, and advanced techniques for research staff, practicing engineers, and technical managers alike. Since the contributions are drawn from international experts in both academia and industry, the book should be attractive to both practicing professional engineers and researchers worldwide.

Written by internationa experts in academia and industry, Insights Into Mobile Multimedia Communications Presents an integrated view of advanced radio systems, network architectures and source coding Describes the state-of-the-art as well as indicating future directions in this rapidly developing field Acts as a repository of ideas, design examples and advanced techniques for research staff, practising engineers and technical managers Is unique in integrating both communication systems and multimedia source coding aspects with emphasis on the problems of mobility

Spectacular advances during the last decade have altered the related disciplines of computing and telecommunications beyond all recognition. The developments in the"enabling technologies,"which have made these advances possible, have been less obvious to the casual observer. The subject of this book is one of these technologies--the coding of still images and picture sequences (video).Digital Compression of Still Images and Video is general in approach and covers all the recognized coding algorithms; explaining their basic theory in enough detail that the reader will understand the principles involved. Results which have been achieved with coding algorithms by researchers in all parts of the world are also discussed. A brief historical review of the area is included to orient those new to the field, and the work is supported by references spanning the period from the earliest work on time/frequency analysis, to the latest topic of research interest--image sequence transmission using asynchronous transfer mode (ATM) techniques.This book will make an excellent reference for graduates and researchers working on image coding and transmission, and will also be of use to those in the related areas of computer vision and multimedia developments. It is essential reading for the rapidly increasing number of technical and professional staff in the industrial environment who, maybe for the first time, are coming to grips with image coding. Provides complete and up-to-date coverage of all digital image and video coding (compression) techniques Includes more than 850 references covering relevant work from the 1940s to the present Presents information on new directions in coding Contains details on current coding standards Describes and explains all algorithms in use for image coding

A comprehensive reference on the exciting growth area of spoken dialogs with computers, this text describes the components of a computer-based spoken dialog system, and will prove invaluable to researchers in industry and academia working on speech communication systems and for applications developers. This state-of-the-art book reviews the complete chain from microphone to speech synthesis. It provides methods, models, and algorithms for building a working system. Renato De Mori is coauthor of each chapter ensuring coherence and homogeneity throughout the text.Spoken Dialogs with Computers covers in detail: transducers and microphone arrays, speech analysis and transformation, acoustic modeling and model training, language modeling, and knowledge integration for automatic speech recognition (ASR). The book also presents generation of word hypotheses, speaker adaptation, robustness and telephone application, use of syntactic and semantic knowledge, speech interpretation and dialog strategies, speech generation, and software system architectures for practical implementation. All the necessary methods and models are provided for building a working systems and there is clear algorithmic presentation of the important components A section on automatic interpretation allows the building of a database query system in spoken language The book will be invaluable to researchers in industry and academia working on speech communication systems and for application developers in industry

Signal Processing for Active Control sets out the signal processing and automatic control techniques that are used in the analysis and implementation of active systems for the control of sound and vibration. After reviewing the performance limitations introduced by physical aspects of active control, Stephen Elliott presents the calculation of the optimal performance and the implementation of adaptive real time controllers for a wide variety of active control systems.Active sound and vibration control are technologically important problems with many applications. 'Active control' means controlling disturbance by superimposing a second disturbance on the original source of disturbance. Put simply, initial noise + other specially-generated noise or vibration = silence [or controlled noise]. This book presents a unified approach to techniques that are used in the analysis and implementation of different control systems. It includes practical examples at the end of each chapter to illustrate the use of various approaches.This book is intended for researchers, engineers, and students in the field of acoustics, active control, signal processing, and electrical engineering.

Advanced Array Systems, Applications and RF Technologies adopts a holistic view of arrays used in radar, electronic warfare, communications, remote sensing and radioastronomy. Radio frequency (RF) and intermediate frequency (IF) signal processing is assuming a fundamental importance, owing to its increasing ability to multiply a system's capabilities in a cost-effective manner. This book comprehensively covers the important front-end RF subsystems of active phased arrays, so offering array designers new and exciting opportunities in signal processing. Provides an up to date record of existing systems from different applications Explores array systems under development Bridges the gap between textbook coverage of idealized phased arrays and practical knowledge of working phased arrays Recognises the significance of cost to the realization of phased arrays Discusses future advances in the field that promise to deliver even more affordable arrays ['intelligent' or self-focussing/-cohering arrays]