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[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings

9-10 May 1991

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Displaying Results 1 - 25 of 204
  • On placement of the ACR-NEMA bus in picture archiving and communications systems

    Publication Year: 1991, Page(s):561 - 564 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (389 KB)

    The ACR-NEMA standard (1985) allows different medical devices to communicate compatibly in a picture archiving and communication system (PACS) environment. The authors evaluate the performance of PACSs incorporating the ACR-NEMA standard. The ACR-NEMA standard requires that the ACR-NEMA bus be placed between any medical device and a network interface unit. The authors propose the removal of the AC... View full abstract»

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  • IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (Cat. No.91CH2954-6)

    Publication Year: 1991
    Request permission for commercial reuse | PDF file iconPDF (155 KB)
    Freely Available from IEEE
  • A neural network for deblurring an image

    Publication Year: 1991, Page(s):457 - 460 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    A neural network architecture for deblurring a blurry scene without prior knowledge of the blur is proposed. Two different training algorithms are described, one a standard neural network training algorithm (employing the least mean squares (LMS) rule) and the second an original algorithm, dubbed algorithm-X. Both were successful for developing inverse blur filters to enhance a blurry picture. Alg... View full abstract»

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  • OSNet: A neural network implementation of order statistic filters

    Publication Year: 1991, Page(s):453 - 456 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    A neural network model, called OSNet (order statistic network), which finds the kth largest element in an array of integers is proposed. There are four layers of neurons in OSNet, thus the total processing time is four times the processing time of one single neuron. As the number of the elements in the input array increases, only the number of neurons in each layer increases. Therefore,... View full abstract»

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  • A neural net acoustic phonetic feature extractor based on wavelets

    Publication Year: 1991, Page(s):449 - 452 vol.2
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    An experimental speech processing system for extracting acoustic phonetic features from speaker independent continuous speech has been built and tested. The system uses wavelet analysis to preprocess the speech, and a two-layer receptive field neural network to recognize the phonetic features. The recognizer was implemented in software on a desktop computer, and DARPA's TIMIT CD-ROM database of co... View full abstract»

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  • A stable output error adaptive IIR filter

    Publication Year: 1991, Page(s):717 - 720 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    The authors analyze the adaptive infinite-impulse-response (IIR) filter algorithm, i.e., the output error algorithm. Based on the averaging SPR condition (B.D.O. Anderson et al., 1986 and E. Bai et al., 1988), the authors present two stable output error adaptive IIR filter algorithms and their realizations. These algorithms can more readily satisfy stability conditions and are easier to realize. T... View full abstract»

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  • An approach for ensuring manipulator tip accuracy near singularities

    Publication Year: 1991, Page(s):270 - 273 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The approach is based upon the online planning of suitable alternative instantaneous motions (velocities). Planned alternative velocities are used to replace impracticable desired velocity specifications. Joint rate truncation and optimization subject to motion feasibility constraints are used to plan the alternative motion. The motion feasibility constraints are determined by screw quantities rec... View full abstract»

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  • Soft bounded policy for congestion control of communication network

    Publication Year: 1991, Page(s):445 - 448 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    The authors propose a soft bounded policy for congestion control of a communication network. The resultant blocking by this policy is examined. The key point is that congestion is usually not a static resource allocation problem. The chief cause of congestion is the dynamic property of traffic. Dynamic traffic needs a dynamic scheme. The soft bounded policy aims to fulfill the dynamic control of t... View full abstract»

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  • An efficient adaptive noise cancelling technique

    Publication Year: 1991, Page(s):713 - 716 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    The authors consider adaptive noise canceling through adaptive infinite-impulse-response (IIR) filtering. The parallel-form adaptive equation error and output error IIR filter are addressed. The performance is better than that of the adaptive FIR filter. The authors also consider the special problems which are only present in an adaptive IIR filter. Computer simulation results are presented to ill... View full abstract»

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  • A design plan knowledge acquisition support system for knowledge-based design system

    Publication Year: 1991, Page(s):376 - 379 vol.1
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    A knowledge representation scheme, called the design plan, is utilized to represent design knowledge. Although many kinds of design knowledge can be represented as design plans, it may be difficult for designers to express their knowledge using the design plan knowledge representation directly. Hence, a framework of a knowledge acquisition support environment of the design plan is proposed based o... View full abstract»

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  • An LU factorization algorithm for parallel supercomputers with memory hierarchies

    Publication Year: 1991, Page(s):17 - 20 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    A parallel algorithm for solving LU factorization of huge dense matrices was developed for parallel vector supercomputers with a hierarchy of memory layers (i.e., local memories, shared memory, semiconductor extended storage, and magnetic disk). The algorithm is based on Gaussian elimination and optimizes data transfers among memory layers by recursively using a block partitioning method. Using fo... View full abstract»

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  • Hardware interface configuration for motion control of the PUMA-560 and the Mitsubishi RM-501 robots

    Publication Year: 1991, Page(s):266 - 269 vol.1
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Both the Mitsubishi RM-501 and the PUMA-560 robot manipulator control hardware structures have been sufficiently modified to facilitate manipulator motion control research. In the case of the RM-501, the Movemaster Controller was completely replaced by hardware based on the driver-sensor interface bus (DISBus). For the PUMA system, it was desired to use as much of the MARK II controller as possibl... View full abstract»

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  • Analysis of a new 1-D IIR median hybrid filter

    Publication Year: 1991, Page(s):764 - 767 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A class of nonlinear filters, the class of multidirectional infinite impulse response median hybrid (MIMH) filters, is presented and analyzed. The input signal is processed twice using a linear shift-invariant (LSI) infinite impulse response (IIR) filtering module: once with normal causality and a second time with inverted causality. The final output of the MIMH filter is the median of the two dir... View full abstract»

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  • Waiting time distribution in real-time integrated service systems

    Publication Year: 1991, Page(s):546 - 549 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The author examines an integrated services system at a time-division multiplexing (TDM) node where packets of two priorities, the HP (high priority) and the LP (low priority), are served. The arrivals of LP packets are assumed to be Poisson, while the HP arrivals have a frame-to-frame dependency that characterizes many real-time systems. The system is modeled as a discrete-time system with a fluct... View full abstract»

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  • Performance evaluation of a demand assignment multiple access scheme for mobile radio dispatch over satellite

    Publication Year: 1991, Page(s):418 - 421 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The authors present the performance evaluation of a demand assignment multiple access (DAMA) scheme designed specifically for the mobile radio service (MRS) to be supported by the emerging mobile satellite systems (MSSs). MRS caters mainly to private voice dispatch applications, where traffic is characterized by short holding time and fixed connectivity. The DAMA scheme makes use of call queuing, ... View full abstract»

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  • Multifunction workstation integrated voice/data/graphics for the ISDN environment

    Publication Year: 1991, Page(s):441 - 444 vol.2
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The authors focus on the development of a multifunction workstation for the ISDN environment, integrating voice, data, and graphics information. The configuration and services of the workstation are introduced. The multimedia protocol and multimedia synchronization are discussed, and the implementation of the ISDN communication control unit (CCU) board and the CCU interface to the host computer ar... View full abstract»

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  • The transform-domain forward-backward LMS adaptive filter with applications

    Publication Year: 1991, Page(s):709 - 712 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    The authors present the transform-domain forward-backward least-mean-squares (LMS) (TFBLMS) adaptive algorithm, its properties, and applications. The authors demonstrate that the TFBLMS adaptive line enhancer (ALE) gives significantly improved convergence speed for various applications with colored noise inputs and same level of reduced misadjustment as the forward-backward LMS (FBLMS) ALE for a g... View full abstract»

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  • An intelligent basis for design

    Publication Year: 1991, Page(s):371 - 375 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    A description is presented of the first steps towards an intelligent CAD system based on a mixed-initiative approach. The expert system is an object-oriented model-based reasoning engine using constraint propagation and dependency backtracking. The architecture is built around the expert system, a CAD engine, and a user interface/controller module mediating the mixed-initiative relationship betwee... View full abstract»

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  • Candidate machining sequence generation for optimal process planning using a knowledge-based system

    Publication Year: 1991, Page(s):569 - 572 vol.2
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    An approach for generating feasible machining sequences to a given mechanical design, using a knowledge-based system, is presented. Manufacturing knowledge applied in the production sequence generation, including machine availability, feasible production operations, production cost-tolerance relations, and successive and alternative production operations are modeled and implemented in a knowledge-... View full abstract»

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  • An architecture of highly parallel computer AP 1000

    Publication Year: 1991, Page(s):13 - 16 vol.1
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    A highly parallel computer with distributed memory called the AP1000 has been developed. The system consists of 64 and 1024 processing elements and three independent networks called the torus network (T-net), broadcast network (B-net), and synchronization network (S-net). The design goal for the AP1000 is to attain low-latency, high-throughput communication. To reduce the overall communication lat... View full abstract»

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  • Speech enhancement based on Kalman filtering and EM algorithm

    Publication Year: 1991, Page(s):142 - 145 vol.1
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    Speech enhancement via Kalman filtering is considered. It is generally agreed that the quality of the estimate of speech production model parameters is crucial to the performance of the Kalman filter. The Kalman filter with a more accurate estimate of the LPC parameters will generally achieve better noise cancellation results. In practice only the noisy speech is available for the LPC analysis. Th... View full abstract»

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  • Multisensor data fusion: concepts and principles

    Publication Year: 1991, Page(s):235 - 237 vol.1
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Multisensor data fusion is concerned with the integration and extraction of information from data obtained by two or more sensors. Assuming the data contaminated with noise, the authors present the necessary definitions and concepts to formulate multisensor data fusion as a problem of inference. The types of problems addressed include detection, resolution, discrimination, and parameter estimation... View full abstract»

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  • VLSI design of a modulo-extractor

    Publication Year: 1991, Page(s):327 - 330 vol.1
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A VLSI design of a modulo-extractor based on the principles of residue arithmetic is discussed. A method for computing (X)m for specific values of m is analyzed, and the area-time complexity has been implemented in 3 μm CMOS3DLM technology. Simulation results have yielded a propagation delay of less than 100 ns View full abstract»

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  • Design of robust packet synchronization using standard VLSI input-output devices in packet radio communication

    Publication Year: 1991, Page(s):749 - 752 vol.2
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    A robust packet synchronization technique is analyzed for serial data links which are to be implemented using standard VLSI synchronous input/output (SIO) hardware devices with a built-in 8-bit synchronization correlator. The technique uses a multiple byte marker synchronization in noisy radio channels where forward error correction (FEC) with automatic-repeat-request (ARQ) is used. A tradeoff bet... View full abstract»

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  • Experiments on a flexible one-link manipulator

    Publication Year: 1991, Page(s):262 - 265 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    A single-link flexible arm setup has been built. The major objective is to use it as a testbed to explore and investigate new controller designs and the related control problems for this kind of plant. The experiments reported are concerned with model identification and several existing control law implementations. One interesting result obtained in identification is that all of the first three fl... View full abstract»

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