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Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
This initial phase of the effort is focused on developing and understanding appropriate definitions, tools, and methods applicable to the problem of providing reliable information in highly dynamic physical and communication environments. A fundamental criterion of the "defining" phase is to apply compatibly efficient methods and to investigate relationships within the available information space that are hierarchical in their segmentation, assignment and processing of information. This process establishes a foundation for the objectivication of the underlying properties in the information space that is consistent with the capabilities provided by the methods and tools used to extract, enhance, or verify the information. Ultimately, this should lead to an information alphabet that allows rapid identification objects within the information environment. As applied to this project, the alphabet and the associated syntax for building objects, will be used to define, and hence reduce, the impacts and effects created by noise in the information gathering, and transmission processes. This formulation of the information environment will also be applicable to other object related activities, such as, compression, identification, tracking, and enhancement, and thus, will provide a computationally efficient foundation for various information processing activities in highly dynamic environments, such as those anticipated for UCAV or hypersonic missile systems.
Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
This initial phase of the effort is focused on developing and understanding appropriate definitions, tools, and methods applicable to the problem of providing reliable information in highly dynamic physical and communication environments. A fundamental criterion of the "defining" phase is to apply compatibly efficient methods and to investigate relationships within the available information space that are hierarchical in their segmentation, assignment and processing of information. This process establishes a foundation for the objectivication of the underlying properties in the information space that is consistent with the capabilities provided by the methods and tools used to extract, enhance, or verify the information. Ultimately, this should lead to an information alphabet that allows rapid identification objects within the information environment. As applied to this project, the alphabet and the associated syntax for building objects, will be used to define, and hence reduce, the impacts and effects created by noise in the information gathering, and transmission processes. This formulation of the information environment will also be applicable to other object related activities, such as, compression, identification, tracking, and enhancement, and thus, will provide a computationally efficient foundation for various information processing activities in highly dynamic environments, such as those anticipated for UCAV or hypersonic missile systems.
Author: David Bull Publisher: Academic Press ISBN: 0128203544 Category : Technology & Engineering Languages : en Pages : 610
Book Description
Intelligent Image and Video Compression: Communicating Pictures, Second Edition explains the requirements, analysis, design and application of a modern video coding system. It draws on the authors' extensive academic and professional experience in this field to deliver a text that is algorithmically rigorous yet accessible, relevant to modern standards and practical. It builds on a thorough grounding in mathematical foundations and visual perception to demonstrate how modern image and video compression methods can be designed to meet the rate-quality performance levels demanded by today's applications and users, in the context of prevailing network constraints. "David Bull and Fan Zhang have written a timely and accessible book on the topic of image and video compression. Compression of visual signals is one of the great technological achievements of modern times, and has made possible the great successes of streaming and social media and digital cinema. Their book, Intelligent Image and Video Compression covers all the salient topics ranging over visual perception, information theory, bandpass transform theory, motion estimation and prediction, lossy and lossless compression, and of course the compression standards from MPEG (ranging from H.261 through the most modern H.266, or VVC) and the open standards VP9 and AV-1. The book is replete with clear explanations and figures, including color where appropriate, making it quite accessible and valuable to the advanced student as well as the expert practitioner. The book offers an excellent glossary and as a bonus, a set of tutorial problems. Highly recommended! --Al Bovik - An approach that combines algorithmic rigor with practical implementation using numerous worked examples - Explains how video compression methods exploit statistical redundancies, natural correlations, and knowledge of human perception to improve performance - Uses contemporary video coding standards (AVC, HEVC and VVC) as a vehicle for explaining block-based compression - Provides broad coverage of important topics such as visual quality assessment and video streaming
Author: Lisa M. Marvel Publisher: ISBN: 9781423570844 Category : Languages : en Pages : 98
Book Description
In the effort to digitize the battlefield, one of the most difficult capabilities to provide is the reliable transmission of imagery across the data links available. The most severe obstacles occur at low echelons, where the communication link is provided by combat net radios. The low-bandwidth, noisy nature of this physical channel represents the most serious challenge to implementation of the digital battlefield of the future. These channels make the compression of any imagery a requirement for timely transmission. In this paper, we explore the effects of noise on a variety of image compression techniques - namely, fractal, wavelet, DPCM, and the most recent compression standard for still imagery, JPEG version 6. Methods for minimizing the effects of the noisy channel on algorithm performance are also considered.
Author: Publisher: ISBN: Category : Aeronautics Languages : en Pages : 700
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author: Tuomas Virtanen Publisher: John Wiley & Sons ISBN: 1119970881 Category : Technology & Engineering Languages : en Pages : 514
Book Description
Automatic speech recognition (ASR) systems are finding increasing use in everyday life. Many of the commonplace environments where the systems are used are noisy, for example users calling up a voice search system from a busy cafeteria or a street. This can result in degraded speech recordings and adversely affect the performance of speech recognition systems. As the use of ASR systems increases, knowledge of the state-of-the-art in techniques to deal with such problems becomes critical to system and application engineers and researchers who work with or on ASR technologies. This book presents a comprehensive survey of the state-of-the-art in techniques used to improve the robustness of speech recognition systems to these degrading external influences. Key features: Reviews all the main noise robust ASR approaches, including signal separation, voice activity detection, robust feature extraction, model compensation and adaptation, missing data techniques and recognition of reverberant speech. Acts as a timely exposition of the topic in light of more widespread use in the future of ASR technology in challenging environments. Addresses robustness issues and signal degradation which are both key requirements for practitioners of ASR. Includes contributions from top ASR researchers from leading research units in the field
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Author: David Bull
Author: Lisa M. Marvel
Author: Xiaodong Li
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Author: Tuomas Virtanen
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Author: Yong Pei (Ph.D.)
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