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Designing an embedded video processing camera using a 16-bit microprocessor for a surveillance system

Journal of VLSI Signal Processing systems for Signal, Image, and Video Technology 2006年第1期42卷 57-68页

作者： Sato, Koichi Evans, Brian L. Aggarwal, J.K. Department of Electrical and Computer Engineering Computer and Vision Research Center University of Texas at Austin Austin TX 78712 United States Department of Electrical and Computer Engineering Embedded Signal Processing Laboratory University of Texas at Austin Austin TX 78712 United States Department of Electrical and Computer Engineering University of Texas Austin Design and Implementation of Signal Processing Systems Technical Committee IEEE Signal Processing Society IEEE Department of Electrical and Computer Engineering Computer and Vision Research Center IEEE Computer Society

This paper describes the design and implementation of a hybrid intelligent surveillance system that consists of an embedded system and a personal computer (PC)-based system. The embedded system performs some of the image processing tasks and sends the processed data to the PC. The PC tracks persons and recognizes two-person interactions by using a grayscale side view image sequence captured by a stationary camera. Based on our previous research, we explored the optimum division of tasks between the embedded system and the PC, simulated the embedded system using dataflow models in Ptolemy, and prototyped the embedded system in real-time hardware and software using a 16-bit CISC microprocessor. This embedded system processes one 320 × 240 frame in 89 ms, which yields one-third of the rate of 30 Hz video system. In addition, the real-time embedded system prototype uses 5.7 K bytes of program memory, 854 K bytes of internal data memory and 2 M bytes external DRAM. © Springer Science + Business Media, Inc. 2006.

关键词： Microprocessor chips

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Value-based design of software V&V processes for NASA flight projects

Value-based design of software V&V processes for NASA flight...

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AIAA Space 2007 Conference

作者： Madachy, Raymond Boehm, Barry Richardson, Julian Feather, Martin Menzies, Tim University of Southern California Los Angeles CA 90089 United States National Aeronautics and Space Administration AMES Research Center Moffett Field CA 94035 United States National Aeronautics and Space Administration Jet Propulsion Laboratories Pasadena CA 91109 United States West Virginia University Morgantown WV 26506 United States University of Southern California Center for Systems and Software Engineering SAL 328 941 W. 37th Place Los Angeles CA 90089 United States AIAA RIACS USRA NASA Ames Research Center Moffett Field CA 94035 United States Software Quality Assurance Office Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive Pasadena CA 91109-8099 United States West Virginia University Lane Department of Computer Science and Electrical Engineering PO Box 6109 Morgantown WV 26506 United States

ISBN: (纸本)1563479079

Software risk advisory tools have been developed to support Verification and Validation (V&V) processes for NASA flight projects on the Constellation program. The Orthogonal Defect Classification COnstructive QUALity MOdel (ODC COQUALMO) predicts software defects introduced and removed classifying them with ODC defect types, allowing various tradeoff analyses. We have been exploring methods to design and optimize V&V processes with static and dynamic versions of the quality model by integrating it with different risk minimization techniques. These techniques allow "what-if" experimentation to determine the impact of V&V techniques on specific risks and overall flight risk. V&V techniques are quantified from a value-based perspective when the defect model is integrated with machine learning, strategic optimization and JPL's Defect Detection and Prevention (DDP) risk management method. Results to-date show that the automated methods are practical for flight projects to design higher value V&V processes in shorter time and with fewer resources.

关键词： Software design

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Coding for additive white noise channels with feedback corrupted by uniform quantization or bounded noise 44

Coding for additive white noise channels with feedback corru...

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44th Annual Allerton Conference on Communication, Control, and Computing 2006

作者： Martins, Nuno C. Weissman, Tsachy Electrical and Computer Engineering Department and the Institute for Systems Research University of Maryland College Park United States Department of Electrical Engineering and the Information Systems Laboratory United States

ISBN: (纸本)9781604237924

We present simple coding strategies, which are variants of the Schalkwijk-Kailath scheme, for communicating reliably over additive white noise channels in the presence of corrupted *** specifically, we consider a framework comprising an additive white forward channel and a backward link which is used for feedback. We consider two types of corruption mechanisms in the backward link. The first is quantization noise, i.e., the encoder receives the quantized values of the past outputs of the forward channel. The quantization is uniform, memoryless and time invariant (that is, symbol-bysymbol scalar quantization), with bounded quantization error. The second corruption mechanism is an arbitrarily distributed additive bounded noise in the backward link. Here we allow symbol-by-symbol encoding at the input to the backward channel. We propose simple explicit schemes that guarantee positive information rate, in bits per channel use, with positive error exponent. If the forward channel is additive white Gaussian then our schemes achieve capacity, in the limit of diminishing amplitude of the noise components at the backward link, while guaranteeing that the probability of error converges to zero as a doubly exponential function of the block length. Furthermore, if the forward channel is additive white Gaussian and the backward link consists of an additive bounded noise channel, with signal-To-noise ratio (SNR) constrained symbol-by-symbol encoding, then our schemes are also capacity-Achieving in the limit of high SNR.

关键词： Exponential functions

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A decentralized computational infrastructure for grid-based parallel asynchronous iterative applications

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Journal of Grid Computing 2006年第4期4卷 355-372页

作者： Li, Zhen Parashar, Manish The Applied Software Systems Laboratory Department of Electrical and Computer Engineering Rutgers University Piscataway NJ 08854 United States

Parallel asynchronous iterative algorithms relax synchronization and communication requirements, and can potentially extend Desktop Grids beyond embarrassingly parallel applications to support a broader class of parallel iterative applications. This paper presents the design and implementation of CometG, a decentralized (peer-to-peer) computational infrastructure that extends Desktop Grid environments to support these applications. CometG provides a decentralized and scalable tuple space, efficient communication and coordination support, and application-level abstractions that can be used to implement Desktop Grid applications based on parallel asynchronous iterative algorithms using the master-worker/BOT paradigm. The deployment and evaluations of CometG and a CometG-based application in a wide-area environment using the PlanetLab [7] test bed, as well as a campus network are presented. © Springer Science + Business Media, Inc. 2006.

关键词： Decentralized (peer-to-peer) tuple space Desktop Grids Parallel asynchronous iterative algorithms

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VHDL code automatic generator for systolic arrays 2

VHDL code automatic generator for systolic arrays

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2nd International Conference on Information and Communication Technologies: From Theory to Applications, ICTTA 2006

作者： Tselepis, I.N. Bekakos, M.P. Department of Electrical and Computer Engineering Laboratory of Digital Systems Democritus University of Thrace Xanthi67100 Greece

ISBN: (纸本)0780395212

Systolic arrays speed up scientific computations with inherent parallelization, by exploiting massive data pipeline parallelism. In addition, they include short and problem-size independent signal paths, predictable performance, scalability, and simple design and test. In this paper, a server-based software tool for the automatic generation of VHDL code describing systolic arrays topologies is presented. Input parameters of the tool are several essential factors for the architectural description of Systolic Arrays (SA), like the interconnection topology of the systolic array, i.e., linear, mesh or hex-connected, the size of the systolic array, i.e., the number of the processing elements (PE) in each dimension, the function of the PE, i.e., the relation between the output and the input ports of every PE and finally the bitlength of PE ports, i.e., the data word size of every port. © 2006 IEEE.

关键词： Systolic arrays

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Distributed amplifiers with non-uniform filtering structures

Distributed amplifiers with non-uniform filtering structures

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2006 IEEE Radio Frequency Integrated Circuits Symposium

作者： Yunliang, Zhu Hui, Wu Laboratory for Advanced Integrated Circuits and Systems Department of Electrical and Computer Engineering University of Rochester Rochester NY

ISBN: (纸本)0780395727

This paper presents a new design concept to better control both passband and stop-band characteristics of distributed amplifiers (DAs) by using non-uniform filtering structures instead of conventional constant-k sections. Two circuit prototypes with Butterworth and Chebyshev filtering were designed using network synthesis method, and implemented in a 0.18μm digital CMOS technology. The Butterworth prototype achieved 11.7dB gain, 9GHz bandwidth, and -5dB/GHz roll-off. The Chebyshev one achieved 10dB gain, 8.5GHz bandwidth and -8dB/GHz roll-off.

关键词： Amplifiers (electronic)

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High-performance full-view vision system with guidance support of acoustic and microwave arrays

High-performance full-view vision system with guidance suppo...

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42nd Annual International Telemetering Conference and Technical Exhibition - Telemetry: Enabler of Innovations in Enterprise Architecture, ITC/USA 2006

作者： Clark, Nicholas Dunne, Fiona Lee, Michael Lee, Hua Imaging Systems Laboratory Department of Electrical and Computer Engineering University of California Santa Barbara United States

This paper describes the concept of wide-angle coverage optical vision system integrated with guidance support of microwave or acoustical imaging arrays. The objective is to provide the capability of effective high-resolution full-view monitoring and sensing. The optical component, formed by a multi-camera array, is responsible for the main interface with human users. The acoustical and microwave arrays are integrated, allowing the system to function in the event-triggered modality for optimal efficiency. In this paper, the arrays discussed are in circular configurations. With minor modification, the system can also function with lineararray configurations. © International Foundation for Telemetering, 2006.

关键词： Microwaves

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Evaluating the efficacy of statistical simulation for design space exploration

Evaluating the efficacy of statistical simulation for design...

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ISPASS 2006: IEEE International Symposium on Performance Analysis of systems and Software, 2006

作者： Joshi, Ajay Yi, Joshua J. Bell Jr., Robert H. Eeckhout, Lieven John, Lizy Lilja, David Department of Electrical and Computer Engineering University of Texas Austin TX IBM Systems and Technology Group Austin TX Networking and Computing Systems Group Freescale Semiconductor Inc. ELIS Department Ghent University Belgium Department of Electrical and Computer Engineering University of Minnesotaat Twin Cities

ISBN: (纸本)1424401860

Recent research has proposed statistical simulation as a technique for fast performance evaluation of superscalar microprocessors. The idea in statistical simulation is to measure a program's key performance characteristics, generate a synthetic trace with these characteristics, and simulate the synthetic trace. Due to the probabilistic nature of statistical simulation the performance estimate quickly converges to a solution, making it an attractive technique to efficiently cull a large microprocessor design space. In this paper, we evaluate the efficacy of statistical simulation in exploring the design space. Specifically, we characterize the following aspects of statistical simulation: (i) fidelity of performance bottlenecks, with respect to cycleaccurate simulation of the program, (ii) ability to track design changes, and (iii) trade-off between accuracy and complexity in statistical simulation models. In our characterization experiments, we use the Plackett & Burman (P&B) design to systematically stress statistical simulation by creating different performance bottlenecks. The key results from this paper are: (1) Synthetic traces stress at least the same 10 most significant processor performance bottlenecks as the original workload, (2) Statistical simulation can effectively track design changes to identify feasible design points in a large design space of aggressive microarchitectures, (3) Our evaluation of 4 statistical simulation models shows that although a very detailed model is needed to achieve a good absolute accuracy in performance estimation, a simple model is sufficient to achieve good relative accuracy, and (4) The P&B design technique can be used to quickly identify areas to focus on to improve the accuracy of the statistical simulation model. © 2006 IEEE.

关键词： Space research

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Novel Applications of Noise in Sensing and Communications

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AIP Conference Proceedings 2007年第1期922卷 405-410页

作者： Laszlo B. Kish Robert Mingesz Zoltan Gingl Gabor Schmera Janusz Smulko Chiman Kwan Peter Heszler Claes‐Goran Granqvist 1Texas A&M University Department of Electrical and Computer Engineering College Station TX 77843‐3128 2University of Szeged Department of Experimental Physics Dom ter 9 Szeged H‐6720 Hungary 3Space and Naval Warfare Systems Center San Diego CA 92152‐5001 4Gdansk University of Technology WETiI ul. G. Narutowicza 11/12 80‐952 Gdansk Poland 5Signal Processing Inc. 13619 Valley Oak Circle Rockville MD 20850 6Research Group of Laser Physics of the Hungarian Academy of Sciences University of Szeged P.O. Box 406 H‐6701 Szeged Hungary 7Department of Engineering Sciences The Ångström Laboratory Uppsala University P.O. Box 534 SE‐751 21 Uppsala Sweden

Recently, it has been shown that excess noises generated or modified by chemical agents can be used to detect and identify chemicals with enhanced sensitivity and selectivity. Moreover thermal noise and its artificial versions (Johnson‐like noises) can be utilized as information carriers with peculiar properties. The first application is called Fluctuation‐Enhanced Sensing. The second class can be called Thermal Noise Informatics with relevant topics are Zero Power Classical Communication and (in the quantum limit) Zero‐Quantum Quantum Communication; Thermal Noise Driven Computing; and Totally Secure Classical Communication. In the paper version of this talk, we will briefly describe the scope of these fields and in the oral talk we also provide extended considerations and results.

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Optical satellite networks

Optical satellite networks

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Optical Fiber Communication Conference, OFC 2006

作者： Chan, Vincent W.S. IEEE Laboratory for Information and Decision Systems Department of Electrical Engineering and Computer Science Department of Aeronautics and Astronautics MIT United States

With high-speed space optical crosslinks, an optical satellite network as part of a larger integrated space-terrestrial network is now feasible. This radical technology building block can have profound transforming ef... 详细信息

ISBN: (纸本)1557528020

关键词： Fiber optics

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