Power and Distortion Optimized Video Coding for Pervasive Computing Applications
Power and Distortion Optimized Video Coding for Pervasive Computing Applications

Author: Yongfang Liang

Publisher:

Published: 2006

Total Pages:

ISBN-13: 9780542604867

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This dissertation investigates video encoding schemes for pervasive computing applications that must ensure low power consumption in addition to high compression efficiency. The contribution of the dissertation is the formulation of a theoretical problem that captures the joint optimization of power and distortion in video coding. The study of the complexity distribution of typical video encoders helps to develop a complexity-scalable video encoding architecture that includes several control parameters to adjust the power consumption of the major modules of the encoder. An analytic framework to model, control and optimize the power-rate-distortion is developed, which facilitates the development of optimization schemes to determine the best configuration of the complexity control parameters according to either or both the power supply level of the device and the video presentation quality. The dissertation proposes complexity control schemes that dynamically adjust the control parameters. Using extensive simulations on an instruction set simulator, the accuracy of the model, and quality of the optimization schemes are investigated. For additional performance improvement, we propose algorithms that exploit the video content to reduce the power consumption and improve the video quality. This is done by obtaining and maintaining the "motion history" of a video sequence in a hierarchical fashion. By adaptively adjusting the complexity parameters according to the motion history information gained from the video sequence, the power is saved when the scene has little motion and consumed when the motion activity increases. Extensive experiments have been performed to show the validity and merits of the proposed techniques.

Rate-Quality Optimized Video Coding
Rate-Quality Optimized Video Coding

Author: Yoo-Sok Saw

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 199

ISBN-13: 1461551250

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Rate-Quality Optimized Video Coding discusses the matter of optimizing (or negotiating) the data rate of compressed digital video and its quality, which has been a relatively neglected topic in either side of image/video coding and tele-traffic management. Video rate management becomes a technically challenging task since it is required to maintain a certain video quality regardless of the availability of transmission or storage media. This is caused by the broadband nature of digital video and inherent algorithmic features of mainstream video compression schemes, e.g. H.261, H.263 and MPEG series. In order to maximize the media utilization and to enhance video quality, the data rate of compressed video should be regulated within a budget of available media resources while maintaining the video quality as high as possible. In Part I (Chapters 1 to 4) the non-stationarity of digital video is discussed. Since the non-stationary nature is also inherited from algorithmic properties of international video coding standards, which are a combination of statistical coding techniques, the video rate management techniques of these standards are explored. Although there is a series of known video rate control techniques, such as picture rate variation, frame dropping, etc., these techniques do not view the matter as an optimization between rate and quality. From the view of rate-quality optimization, the quantizer is the sole means of controling rate and quality. Thus, quantizers and quantizer control techniques are analyzed, based on the relationship of rate and quality. In Part II (Chapters 5 and 6), as a coherent approach to non-stationary video, established but still thriving nonlinear techniques are applied to video rate-quality optimization such as artificial neural networks including radical basis function networks, and fuzzy logic-based schemes. Conventional linear techniques are also described before the nonlinear techniques are explored. By using these nonlinear techniques, it is shown how they influence and tackle the rate-quality optimization problem. Finally, in Chapter 7 rate-quality optimization issues are reviewed in emerging video communication applications such as video transcoding and mobile video. This chapter discusses some new issues and prospects of rate and quality control in those technology areas. Rate-Quality Optimized Video Coding is an excellent reference and can be used for advanced courses on the topic.

Pervasive Communications Handbook
Pervasive Communications Handbook

Author: Syed Ijlal Ali Shah

Publisher: CRC Press

Published: 2017-09-29

Total Pages: 500

ISBN-13: 1420051105

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In an emergency, availability of the pervasive communications environment could mean the difference between life and death. Possibly one of the first guides to comprehensively explore these futuristic omnipresent communications networks, the Pervasive Communications Handbook addresses current technology (i.e., MAC protocols and P2P-based VoD architecture) and developments expected in the very near future, when most people and places will be virtually connected through a constant and perpetual exchange of information. This monumental advance in communications is set to dramatically change daily life, in areas ranging from healthcare, transportation, and education to commerce and socialization. With contributions from dozens of pioneering experts, this important reference discusses one-to-one, one-to-many, and many-to-one exchanges of information. Organized by the three key aspects—technology, architecture, and applications—the book explores enabling technologies, applications and services, location and mobility management, and privacy and trust. Citing the technology’s importance to energy distribution, home automation, and telecare among other areas, it delves into topics such as quality of service, security, efficiency, and reliability in mobile network design, and environment interoperability.

Rate-Distortion Based Video Compression
Rate-Distortion Based Video Compression

Author: Guido M. Schuster

Publisher: Springer Science & Business Media

Published: 2013-03-09

Total Pages: 305

ISBN-13: 1475725663

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One of the most intriguing problems in video processing is the removal of the redundancy or the compression of a video signal. There are a large number of applications which depend on video compression. Data compression represents the enabling technology behind the multimedia and digital television revolution. In motion compensated lossy video compression the original video sequence is first split into three new sources of information, segmentation, motion and residual error. These three information sources are then quantized, leading to a reduced rate for their representation but also to a distorted reconstructed video sequence. After the decomposition of the original source into segmentation, mo tion and residual error information is decided, the key remaining problem is the allocation of the available bits into these three sources of information. In this monograph a theory is developed which provides a solution to this fundamental bit allocation problem. It can be applied to all quad-tree-based motion com pensated video coders which use a first order differential pulse code modulation (DPCM) scheme for the encoding of the displacement vector field (DVF) and a block-based transform scheme for the encoding of the displaced frame differ ence (DFD). An optimal motion estimator which results in the smallest DFD energy for a given bit rate for the encoding of the DVF is also a result of this theory. Such a motion estimator is used to formulate a motion compensated interpolation scheme which incorporates a global smoothness constraint for the DVF.

Embedded System Design and Power-rate-distortion Optimization for Video Encoding Under Energy Constraints
Embedded System Design and Power-rate-distortion Optimization for Video Encoding Under Energy Constraints

Author: Wenye Cheng

Publisher:

Published: 2007

Total Pages:

ISBN-13:

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The portable devices used in video communication application are powered by batteries. Video encoding schemes, however, are often computationally intensive and energy-demanding, even after being fully optimized with existing software and hardware energy-minimization techniques. As a result, the operational lifetime of current portable video systems is still very short. Therefore, one of the central challenging issues in portable video communication system design is to minimize the energy consumption of video encoding so as to extend the operational lifetime of devices. In this work, An operational power-rate-distortion (P-R-D) approach is developed to minimizing the video encoding energy under rate-distortion constraints. Theoretically, we analyzed the energy saving gain of P-R-D optimization. Practically, we developed an adaptive scheme to estimate the P-R-D model parameters and performed on-the-fly energy optimization for real-time video compression. Our results show that, for typical videos with non-stationary statistics, using the proposed P-R-D optimization technology, the encoder energy consumption can be significantly reduced. This has many important applications in energy-efficient portable video communication system design.

Advances in Multimedia Information Processing -- PCM 2010, Part II
Advances in Multimedia Information Processing -- PCM 2010, Part II

Author: Guoping Qiu

Publisher: Springer Science & Business Media

Published: 2010-09-03

Total Pages: 780

ISBN-13: 3642156959

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The 2010 Pacific-Rim Conference on Multimedia (PCM 2010) was held in Shanghai at Fudan University, during September 21–24, 2010. Since its inauguration in 2000, PCM has been held in various places around the Pacific Rim, namely Sydney (PCM 2000), Beijing (PCM 2001), Hsinchu (PCM 2002), Singapore (PCM 2003), Tokyo (PCM 2004), Jeju (PCM 2005), Zhejiang (PCM 2006), Hong Kong (PCM 2007), Tainan (PCM 2008), and Bangkok (PCM 2009). PCM is a major annual international conference organized as a forum for the dissemination of state-of-the-art technological advances and research results in the fields of theoretical, experimental, and applied multimedia analysis and processing. PCM 2010 featured a comprehensive technical program which included 75 oral and 56 poster presentations selected from 261 submissions from Australia, Canada, China, France, Germany, Hong Kong, India, Iran, Italy, Japan, Korea, Myanmar, Norway, Singapore, Taiwan, Thailand, the UK, and the USA. Three distinguished researchers, Prof. Zhi-Hua Zhou from Nanjing University, Dr. Yong Rui from Microsoft, and Dr. Tie-Yan Liu from Microsoft Research Asia delivered three keynote talks to the conference. We are very grateful to the many people who helped to make this conference a s- cess. We would like to especially thank Hong Lu for local organization, Qi Zhang for handling the publication of the proceedings, and Cheng Jin for looking after the c- ference website and publicity. We thank Fei Wu for organizing the special session on large-scale multimedia search in the social network settings.

Pervasive Computing
Pervasive Computing

Author: Aboul-Ella Hassanien

Publisher: Springer Science & Business Media

Published: 2009-09-23

Total Pages: 468

ISBN-13: 1848825994

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The main objective of pervasive computing systems is to create environments where computers become invisible by being seamlessly integrated and connected into our everyday environment, where such embedded computers can then provide inf- mation and exercise intelligent control when needed, but without being obtrusive. Pervasive computing and intelligent multimedia technologies are becoming incre- ingly important to the modern way of living. However, many of their potential applications have not yet been fully realized. Intelligent multimedia allows dynamic selection, composition and presentation of the most appropriate multimedia content based on user preferences. A variety of applications of pervasive computing and - telligent multimedia are being developed for all walks of personal and business life. Pervasive computing (often synonymously called ubiquitous computing, palpable computing or ambient intelligence) is an emerging ?eld of research that brings in revolutionary paradigms for computing models in the 21st century. Pervasive c- puting is the trend towards increasingly ubiquitous connected computing devices in the environment, a trend being brought about by a convergence of advanced el- tronic – and particularly, wireless – technologies and the Internet. Recent advances in pervasive computers, networks, telecommunications and information technology, along with the proliferation of multimedia mobile devices – such as laptops, iPods, personal digital assistants (PDAs) and cellular telephones – have further stimulated the development of intelligent pervasive multimedia applications. These key te- nologiesarecreatingamultimediarevolutionthatwillhavesigni?cantimpactacross a wide spectrum of consumer, business, healthcare and governmental domains.

Video Coding with Superimposed Motion-Compensated Signals
Video Coding with Superimposed Motion-Compensated Signals

Author: Markus Flierl

Publisher: Springer Science & Business Media

Published: 2006-04-18

Total Pages: 166

ISBN-13: 1402077653

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Appendices 133 A Mathematical Results 133 A.1 Singularities of the Displacement Error Covariance Matrix 133 A.2 A Class of Matrices and their Eigenvalues 134 A.3 Inverse of the Power Spectral Density Matrix 134 A.4 Power Spectral Density of a Frame 136 Glossary 137 References 141 Index 159 Preface This book aims to capture recent advances in motion compensation for - ficient video compression. It investigates linearly combined motion comp- sated signals and generalizes the well known superposition for bidirectional prediction in B-pictures. The number of superimposed signals and the sel- tion of reference pictures will be important aspects of the discussion. The application oriented part of the book employs this concept to the well known ITU-T Recommendation H.263 and continues with the improvements by superimposed motion-compensated signals for the emerging ITU-T R- ommendation H.264 and ISO/IEC MPEG-4 (Part 10). In addition, it discusses a new approach for wavelet-based video coding. This technology is currently investigated by MPEG to develop a new video compression standard for the mid-term future.

Advanced Video Coding Systems
Advanced Video Coding Systems

Author: Wen Gao

Publisher: Springer

Published: 2015-01-15

Total Pages: 244

ISBN-13: 3319142437

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This book presents an overview of the state of the art in video coding technology. Specifically, it introduces the tools of the AVS2 standard, describing how AVS2 can help to achieve a significant improvement in coding efficiency for future video networks and applications by incorporating smarter coding tools such as scene video coding. Features: introduces the basic concepts in video coding, and presents a short history of video coding technology and standards; reviews the coding framework, main coding tools, and syntax structure of AVS2; describes the key technologies used in the AVS2 standard, including prediction coding, transform coding, entropy coding, and loop-filters; examines efficient tools for scene video coding and surveillance video, and the details of a promising intelligent video coding system; discusses optimization technologies in video coding systems; provides a review of image, video, and 3D content quality assessment algorithms; surveys the hot research topics in video compression.

Handbook of Energy-Aware and Green Computing - Two Volume Set
Handbook of Energy-Aware and Green Computing - Two Volume Set

Author: Ishfaq Ahmad

Publisher: CRC Press

Published: 2016-02-03

Total Pages: 1284

ISBN-13: 1482254441

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Implementing energy-efficient CPUs and peripherals as well as reducing resource consumption have become emerging trends in computing. As computers increase in speed and power, their energy issues become more and more prevalent. The need to develop and promote environmentally friendly computer technologies and systems has also come to the forefront