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International Symposium on Signal Processing and Its Applications (ISSPA)

作者： J. Pihl E.J. Aas Faculty of Electrical and Computer Engineering Department of Physical Electronics Norwegian University of Science and Technology Trondheim Norway

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Objective picture quality scale for video coding

Objective picture quality scale for video coding

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IEEE International Conference on Image Processing

作者： Y. Horita M. Katayama T. Murai M. Miyahara Department of Electronics and Computer Science Faculty of Engineering Toyama University Toyama Japan School of Computer Science Japan Advanced Institute of Science and Technology Ishikawa Japan

To design the image communication system including human visual system systematically, the objective quality estimation method of the picture based on the model of the human vision is necessary. We develop the objective picture quality scale (PQSvideo) for video coding considering the relation between the physical distortion factors and the psychological picture estimation factors. The obtained cross correlation coefficient between the PQSvideo and the mean opinion score (MOS), becomes 0.978.

关键词： Video coding Psychology Humans Decoding Image coding computer science Image communication Visual system Multimedia systems Image quality

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Flowchart tutoring system with error diagnostic capabilities using program slicing

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SYSTEMS AND computerS IN JAPAN 1996年第13期27卷 86-98页

作者： Okada, S Fujiwara, Y Matsunishi, T Ohkama, H Department of Computer Sciences Faculty of Engineering Kitami Institute of Technology Kitami 090 Japan Kitami Inst. Technol. Electron. Eng. Dept. of Information Engineering Kitami Institute Department of Computer Sciences Kitami Institute Inst. Electronics Info. Commun. E. Info. Processing Society of Japan Department of Computer Sciences Kitami Institute of Technology Hokkaido University Japan NTT Kitami Institute of Technology IEEE ACM Japan. Soc. for Artif. Intelligence

For creation of a good program, excellent structured description is required for the algorithm. In this paper, a flowchart tutoring system is proposed. This system supports the flowchart description by each student and diagnoses its validity in the programming exercise process. First, a cooperative distributed method to support the flowchart description using the hierarchical structure of the structured programming is shown. A hierarchical diagnosis method consisting of syntax, logical structure and semantic validity diagnosis is explained. Algorithms using program slicing are proposed for the semantic validity diagnosis.

关键词： flowchart structured programming blackboard model program slicing

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A finite-element beam-propagation method for strongly guiding optical waveguides with magnetooptic materials

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electronics AND COMMUNICATIONS IN JAPAN PART II-electronics 1996年第7期79卷 22-29页

作者： Tsuji, Y Koshiba, M Tanabe, T Faculty of Engineering Hokkaido University Sapporo Japan 060 Graduated in 1991 from the Department of Electronic Engineering Hokkaido University and received his M.S. degree in 1993. He is currently working toward a doctoral degree. He has been engaged in research on the computer-aided design of optical and quantum-wave phenomena and quantum-effect devices. Graduated in 1971 from the Department of Electronic Engineering Hokkaido University and received his M.S. and Dr. of Eng. degree in 1973 and 1976 respectively. In 1976 he became a Lecturer at Kitami Institute of Technology where he was promoted to an Associate Professor in 1977. In 1979 he became an Associate Professor in the Department of Electronic Engineering Hokkaido University where he was promoted to Professor in 1987. He has been engaged in research on opto- and wave-electronics. In 1987 he received a Best Paper Award. He is the author ofFoundations of Finite Element Method for Opto- and Wave-Electronics(Morikita Publ.)Optical Waveguide Analysis(Asakura Publ.)Optical Waveguide Analysis(McGraw-Hill Book Co.) andOptical Waveguide Theory by the Finite Element Method(KTK Scientific Publishers/Kluwer Academic Publishers). He has co-authored one book and written Graduated in 1995 from the Department of Electronic Engineering Hokkaido University and is currently in the Master's program. He has been engaged in research on opto- and wave-electronics.

To the best of the knowledge of the authors, the formulation is carried out for the first time on the finite-element beam-propagation method for the analysis of the magnetooptic waveguide in which the structure varies along the propagation direction. The present method is applicable not only to the case in which refractive index difference is small but also to the case for the TE mode and the TM mode propagating in a waveguide with a large refractive index difference. To suppress the spurious reflection from the computational window edges, the transparent boundary condition is applied.

关键词： seam-propagation method finite-element method magnetooptical material optical isolator

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Analysis of nonreciprocal mode-conversion properties of magnetooptic channel waveguides using the finite element method

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electronics AND COMMUNICATIONS IN JAPAN PART II-electronics 1996年第10期79卷 32-39页

作者： Zhuang, XP Koshiba, M Tsuji, Y Faculty of Engineering Hokkaido University Sapporo Japan 060 Graduated from the Department of Communication Engineering Guellin Electronic Institute China in 1986. She received her M.S. degree from Hokkaido University in 1991 and was admitted to the doctoral program. She has been engaged in research on the optimum design of magnetooptic waveguides for nonreciprocal optical devices. Graduated in 1971 from the Department of Electronic Engineering Hokkaido University where he received his M.S. degree in 1973 and his Dr. of Eng. degree in 1976. In 1976 he became a Lecturer in the Department of Electronic Engineering Kitami Institute of Technology where he was promoted to Associate Professor in 1977. In 1979 he became an Associate Professor at Hokkaido University where he was promoted to Professor in 1987. He has been engaged in research on optical and wave electronics. In 1987 he received a Best Paper Award. He is the author ofFundamentals of Finite Element Method of Optics and Waves(Morigkata Publ.)Optical Waveguide Analysis(Asakura Publ.)Optical Waveguide Analysis(McGraw-Hill Book Co.) andOptical Waveguide Theory by the Finite Element Method(KTK Scientific Publishing/Kulwer Academic Publishers). He is also co-author of one book and has written chapters in six other books. He is a member of the Institute of Television Engineers of Japan the Institute of Electrical Engineers of Japan the Japan Society for Simulation Technology the Japan Society for Computational Methods in Engineering and the Japan Society of Applied Magnetics and Mechanics. He is also an IEEE Senior Member. Graduated in 1991 from me Department of Electronic Engineering Hokkaido University where he received his M.S. degree in 1993. He is currently in the doctoral program. He has been engaged in research on quantum wave phenomena and computer-aided design of optical and quantum effect devices.

To evaluate nonreciprocal mode conversion characteristics in a magnetooptic channel waveguide, a finite element analysis based on the scalar wave approximation is formulated for the first time. A simple iterative calculation method is conceived for solution of the nonlinear eigenvalue equations finally obtained in which the two polarizations are coupled. Specifically, the maximum isolation ratio in the mode-conversion-type magnetooptic rib guide was evaluated and the validity of the method is confirmed by comparison with published experimental results.

关键词： nonreciprocal optical devices magnetooptic waveguide nonreciprocal mode conversion finite element method numerical analysis

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A 32-bit GaAs IEEE floating point multiplier using Trailing-1's rounding algorithm

A 32-bit GaAs IEEE floating point multiplier using Trailing-...

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1995 IEEE Conference on Electronic technology Directions to the Year 2000, ETD 1995

作者： Cui, S. Burgess, N. Liebelt, M. Eshraghian, K. Department of Electrical and Electronic Engineering University of Adelaide SA5005 Australia Dept of Electronics Computer and Communication Engineering Faculty of Science and Technology Edith Cowan University WA6027 Australia

ISBN: (纸本)0818670851

The paper presents a GaAs 32-bit IEEE floating point multiplier. A modified carry save array is used in conjunction with Booth's algorithm to reduce the partial product addition and interconnection. A special rounding technique called Trailing-1's Predictor is used to speed up the final addition and rounding. This chip uses a new layout methodology for easy design structure and improved GaAs technology layout density. The combination of the fast arithmetic architecture and compact layout style achieves 4ns multiplication time with 3.5 W power dissipation at 75°C. The area is 2.43 mm by 3.77 mm (excluding pads) and uses 28000 transistors to give a density of 3056 transistors/mm2 for 0.8μm GaAs technology. © 1995 IEEE.

关键词： Gallium arsenide

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Direct conversion receiver for 2- and 4-level FSK signals

Direct conversion receiver for 2- and 4-level FSK signals

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International Conference on Universal Personal Communications

作者： M. Saitou M. Kawabata Y. Akaiwa Department of Computer Science and Electronics Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Fukuoka Japan

Direct conversion (DC) receivers are suitable for integrated circuit implementation. In this report, DC receivers for 2- and 4-level FSK signals are proposed and its BER performance is investigated with computer simulation. For FSK signals, a difference of baseband signal level appears as a difference in a velocity of rotation on IQ-plane. In the proposed circuits, this difference in the velocity is detected with differential circuits and logic circuits such as flip-flop, counter and so on. Performance under frequency offset is also investigated and a compensation method for the frequency offset is proposed.

关键词： Frequency shift keying Baseband Signal detection Logic circuits RF signals Modulation Detectors computer science Bit error rate computer simulation

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FAULT-TOLERANT ASSOCIATE MEMORIES

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SYSTEMS AND computerS IN JAPAN 1995年第7期26卷 1-12页

作者： FUJIWARA, E TANAKA, T Member Faculty of Engineering Tokyo Institute of Technology Tokyo Japan 152 Eui Fujiwara:received his B.S. and M.S. degrees in Electronics Engineering in 1968 and 1970 respectively and his Dr. of Eng. degree in 1981 all from Tokyo Institute of Technology. In 1970 he joined the NTT Musashino Electrical Communication Laboratories and engaged in developing PIPS-1 and PIPS-11 computer systems. In 1988 he joined the Department of Computer Science Tokyo Institute of Technology as an Associate Professor. In 1990 he became a full Professor. He was a Visiting Professor at the Center for Advanced Computer Studies the University of Southwestern Louisiana from June 1985 to July 1986. His current research interests include coding theory for computers fault-tolerant memories VLSI defect-toleranceand WSI systems. He is a co-author ofError Control Coding for Computer Systems(Prentice-Hall1989) EssentiaLF of Error-Correcting Coding Techniques (Academic Press 1990) and other books. Dr. Fujiwara received the Young Engineer Award from the I.E.I.C.E. in 1978 and the Teshima Memorial Research Award in 1991. He is a senior member of the IEEE and a member of the Information Processing Society Japan. Associate Member

Because of its capability of high-speed search, the associative memory (CAM) is expected to be used in a variety of information processing systems. In this paper, novel fault-tolerant techniques which are effective for on-line use are proposed for TLB which is an example of the application of CAM. First, fault and error models of the TLB consisting of the CAM part and the SRAM part are clarified. Then, the fault-tolerant techniques for these faults and errors, such as distance separable technique, cod-ing technique, simplified 1-out-of-n check and graceful degradation, are proposed. The distance separable technique which encodes the data stored in the CAM part is the one which masks the faulty CAM part and prevents errors from propagating to the subsequent circuits. The coding technique checks the one-to-one correspondence between the data in the CAM and those in SRAM by using the SEC-DED code with byte error detection capability, i.e., SEC-DED-SbED code, and at the same time it detects and corrects errors in the data stored in SRAM. The simplified 1-out-of-n check processes association errors. The graceful degradation gives a flag in the faulty memory section and prevents it from being used. The methods proposed in this paper are evaluated from area augmentation and error detection capability perspectives. The results show that the fault-tolerant TLB with 32 virtual address bits, 32 physical address bits and 128 entries gives single fault detection probability of nearly 99 percent with 28 percent area increase.

关键词： CAM TLB DISTANCE SEPARABLE TECHNIQUE CODING TECHNIQUE SIMPLIFIED 1-OUT-OF-N CHECK GRACEFUL DEGRADATION

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Development and application of MCAL tools for marine radar instruction

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computer Applications in engineering Education 1995年第4期3卷 259-259页

作者： Guirguis, S. Korany, E. Abdel-Bary, A. Institute of Graduate Studies and Research Alexandria University Alexandria Egypt Shawkat K. Guirguis:obtained the BSc and M.Sc. degrees in Computer Science and Automatic Control Faculty of Engineering Alexandria University in 1981 and 1984 respectively. In 1988 he obtained a PhD degree in Electronics and Communications Faculty of Engineering Cairo University co-supervised by the Imperial College of Science and Technology University of London where he spent two years as an academic visitor. His current research interests include software quality management multimedia automatic programming and decision support systems. He is currently a lecturer of Computer Science at the Institute of Graduate Studies & Research Alexandria University. Ezzat A. Korany:received the BS degree in Electrical Engineering (Electronics Section) from the University of Alexandria Egypt in 1971 the MS degree in Electrical Engineering (Computer Section) from Ain Shams University Cairo Egypt in 1977 and the PhD degree in Electrical Engineering (Digital Systems) from Florida Institute of Technology U.S.A. in 1982. He is currently an associate professor of Computer Science at the Institute of Graduate Studies & Research University of Alexandria. His research interests are in data communications and multimedia applications computer networks image processing and pattern recognition. Abdel-Latif A. Abdel-Bary:obtained the BEng degree in Electronics Technology from Arab Maritime Transport Academy in 1986. In 1995 he obtained the MSc degree in Information Technology from the Institute of Graduate Studies & Research Alexandria University. His current research interests include ICAL hypermedia and automatic programming.

In this article a multimedia computer-assisted learning (MCAL) system is presented. The major objective of this work was to investigate the potential of using such systems as tools for transferring instructional course information through various types of computer media as opposed to the classic CAL systems. The philosophy and techniques employed to design the system are investigated. Usage of the implemented system and its merits have been illustrated through its application to teach engineering students and technicians the theory and concepts of marine radar. System design, implementation, test, and revision phases are presented and discussed.

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A study on degradation of spatial resolution in frequency-modulated continuous wave reflectometry due to nonlinear optical frequency sweep

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electronics AND COMMUNICATIONS IN JAPAN PART II-electronics 1995年第10期78卷 28-35页

作者： Wang, LT Iiyama, K Hayashi, K Faculty of Technology Kanazawa University Kanazawa Japan 920 Koichi liyama:received his B.E. M.E. and Dr. of Eng. degrees in Electronic Engineering all from Kanazawa University Kanazawa Japan in 1985 1987 and 1993 respectively. From 1987 to 1988 he worked at Yokogawa Hewlett-Packard Ltd. Since 1988 he has been working as a Research Associate in the Department of Electrical and Computer Engineering Kanazawa University and is now a Lecturer. His current research interest is fiber-optic sensors optical fiber science including Er-doped fibers optical waveguides and the optical reflectometry. Dr. liyama is a member of the IEEE and the Japan Society of Applied Physics. Members Ken-ichi Hayashi:received his B.E. degree in Electronic Engineering from Kanazawa University Kanazawa Japan in 1966 and his Dr. of Eng. degree from Nagoya University Nagoya Japan in 1977. Since 1966 he has been with the Department of Electronics Kanazawa University where he is now a Professor in the Department of Electrical and Computer Engineering. He is currently engaged in research on applications of Er-doped optical fibers fiber-optic sensors optical waveguides and optical reflectometry. Dr. Hayashi is a member of the SICE and the IEEE.

The degradation of the spatial resolution in frequency-modulated continuous wave (FMCW) reflectometry due to the nonlinearity in the optical frequency sweep are discussed both experimentally and theoretically. The response lag in the optical frequency change of a laser diode behind the injection current change was experimentally measured, showing that there were several time constants in the optical frequency response. The interference signals in the FMCW reflectometry were theoretically calculated by taking account of the response lag. From these calculations, the beat frequency becomes low just after the turning point of the optical frequency sweep;this is due to the response lag in the optical frequency response. As a result, the spectrum of the interference signal is spread out toward the low frequency region and spatial resolution is degraded. Moreover, the spatial resolution is seriously degraded with increasing the diagnosing distance due to the nonlinearity in the optical frequency sweep. The calculated results agree well with the measured results.

关键词： laser diode optical frequency sweep modulation reflectometry

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