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Circuits and Systems, 1994. APCCAS '94., 1994 IEEE Asia-Pacific Conference on

Date 5-8 Dec. 1994

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  • Proceedings of APCCAS'94 - 1994 Asia Pacific Conference on Circuits and Systems

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (1197 KB)
    Freely Available from IEEE
  • Author index

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (191 KB)
    Freely Available from IEEE
  • Minimizing via coupled noise in high performance thermal conduction module design

    Publication Year: 1994, Page(s):548 - 553
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    In the design of thermal conduction modules, chips are interconnected through thin-film layers and glass-ceramic layers. The total amount of noise on the package consists of not only the crosstalk between adjacent signal lines in the X and Y directions, but also the coupled noise between adjacent pins and vias in the Z direction. While the crosstalk between adjacent wires can be minimized by reduc... View full abstract»

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  • Absolute moment block truncation coding in DCT domain

    Publication Year: 1994, Page(s):642 - 645
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    A new approach to absolute moment Block Truncation Coding in the DCT domain to remove interblock redundancy is proposed. The result of applying adaptive DCT to the absolute moment BTC outputs is investigated and simulation results show that its performance is comparable to the BTC-VQ and better visual quality can be achieved if the adaptive DCT is applied to the high-mean and low-mean subimages in... View full abstract»

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  • Acquisition of global topology for 3D objects with local competition

    Publication Year: 1994, Page(s):673 - 677
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    We present a surface model for unsupervised learning of spatial shapes, which consists of a set of planar subnets, each trained by Kohonen's map. The global convergence of this network can be easily guaranteed. The connection in the network is determined by simple local calculations. Simulations on learning of topologically nontrivial objects such as those of higher genus and oriented ones are car... View full abstract»

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  • M-ary CDMA scheme based on interference cancellation

    Publication Year: 1994, Page(s):33 - 38
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    This paper describes the configuration, analysis and characteristics of an M-ary CDMA using Interference Cancellation (IC) with the Walsh orthogonal code. The IC reduces interference signals of other Personal Stations (PSs), improves communication quality and increases system capacity in a cell. In this IC scheme, the cancellation value is calculated from the correlation value, and then the cancel... View full abstract»

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  • A two-level method using a decimation-in-degree algorithm for the computation of the LSP frequencies

    Publication Year: 1994, Page(s):400 - 405
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A two-level method is proposed in this study for rapidly and accurately computing the line spectrum pair (LSP) frequencies. An efficient decimation-in-degree (DID) algorithm is also proposed in the first level which can transform any symmetric or antisymmetric polynomial with real coefficients into the other polynomials with lower degrees and without any transcendental functions. The DID algorithm... View full abstract»

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  • BTC image coding with visual patterns

    Publication Year: 1994, Page(s):646 - 651
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    This paper presents a block truncation coding (BTC) scheme for image compression that employs visual patterns designed independently of the image to be coded. In this method, image blocks are first classified into three classes: uniform, gentle edge, and sharp edge, according to their variations. Design focus is on edge blocks, where two sets of patterns, namely, visual patterns and visual row pat... View full abstract»

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  • BiCMOS chip set for color CCD camera

    Publication Year: 1994, Page(s):678 - 681
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    In this paper, a new BiCMOS chip set for color CCD camera is proposed. The chip set contains three ICs: color separation IC, color matrix IC and video signal encoding IC. This chip set was designed in a production 2-μm BiCMOS technology. Both circuits description and measured results are presented View full abstract»

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  • The comeback of the all-pass equalization approach for digital filter with combined amplitude and phase specifications

    Publication Year: 1994, Page(s):237 - 242
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    In modern digital communication systems the need for digital filters with high selectivity and good phase linearity is rapidly increasing. A new all-pass equalization approach is presented that uses a new design strategy based on the interaction between amplitude and phase (or group-delay) requirements and lattice wave digital filter (WDF) cascaded by an all-pass filter for the realization. Furthe... View full abstract»

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  • A handshake protocol for CDMA wireless LANs with error control capabilities

    Publication Year: 1994, Page(s):39 - 44
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    Observing the threshold effect of CDMA systems, this paper proposes a simple, fair protocol suitable for the CDMA environment, which does not need the additional feedback channel but can still achieve the goal of error control. Based on the same rationale as the CSMA/CD protocol, this protocol is designed to avoid collision or congestion of traffic before formal transmission of a packet. By the ha... View full abstract»

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  • Design and VLSI implementation of real-time weighted median filters

    Publication Year: 1994, Page(s):91 - 96
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    In this paper, a novel design method and VLSI implementation of weighted median filters is presented. The weight parameters are incremented to minimize the mean square error of the input signal and desired signal when the sub-set of the image data is applied. The suboptimal(optimal) weight set is achieved after 71 training cycles for 5*5 window size under the MSE criteria. A two-level adder tree a... View full abstract»

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  • An exact minimization algorithm for generalized Reed-Muller expressions

    Publication Year: 1994, Page(s):460 - 465
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    A generalized Reed-Muller expression (GRM) is obtained by negating some of the literals in a positive polarity Reed-Muller expression (PPRM). There are at most 2n2(n-1) different GRMs for an n-variable function. A minimum GRM is one with the fewest products. This paper presents certain properties and an exact minimization algorithm for GRMs. The minimization algorithm uses binary decisi... View full abstract»

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  • A VLSI architecture of SMU for strongly connected Viterbi decoder

    Publication Year: 1994, Page(s):200 - 205
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    An implementation of the Viterbi algorithm (VA) can be divided into three basic units, the transition metric unit, the added-compare-select unit, and the survivor memory unit (SMU). In this paper, a decoding scheme of SMU for a strongly connected Viterbi decoder is presented. In practice, two approaches, viz., the register-exchange method and the trace-back method, are very useful for survivor mem... View full abstract»

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  • A new composite-adaptive algorithm with reduced computational complexity

    Publication Year: 1994, Page(s):364 - 369
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    In the IA and HA algorithms, the convergence factors are updated every iteration, producing an increase in the number of operations. We propose a new composite-adaptive algorithm in which the IA and HA algorithms are complementarily used for a reduction in the number of operations. In particular, we apply the thinned-out method to the IA algorithm in which the convergence factors are updated only ... View full abstract»

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  • A simple FPGA-based conjugate search motion estimator

    Publication Year: 1994, Page(s):109 - 114
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Conjugate search is an efficient motion estimation algorithm based on block matching for video compression. This paper presents our ongoing work to develop the prototype of the conjugate search motion estimation hardware. So far, we have implemented a simplified version of the conjugate search motion estimation algorithm using field programmable gate arrays. Simulation results indicate that the pe... View full abstract»

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  • Generalized linear models for empirical performance modeling in circuit design

    Publication Year: 1994, Page(s):311 - 316
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    In recent years, designed experiments and response surface methods of analysis have been used in the design and optimization of electronic circuits. The key to this statistical approach is to build a set of accurate response models of the circuit performances. This paper introduces the class of Generalized Linear Models (GLMs), which extend classical linear regression models and often provide bett... View full abstract»

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  • Fuzzy edge-oriented motion-adaptive noise reduction and scanning rate conversion

    Publication Year: 1994, Page(s):652 - 656
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    To improve TV image quality without changing the current transmission standards, advanced soft-decision fuzzy logic techniques have been applied to remove noise affecting pictures and to avoid interlaced-scan-related artifacts, thus leading to the definition of a new Fuzzy Noise Reducer and Scanning Rate Converter system View full abstract»

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  • A new approach to the design of pulse shaping FIR filters

    Publication Year: 1994, Page(s):243 - 248
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    An efficient method is presented for designing pulse shaping FIR digital filters in this paper. It is known that for avoiding intersymbol interference (ISI), certain time-domain constraints for designing optimal pulse shaping filters should be considered. In this paper, the Lagrange multiplier approach is applied, and the constraints are easy to incorporate into the design procedures, which makes ... View full abstract»

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  • Design and analysis of fourth-order leapfrog topologies for sigma-delta A/D converters

    Publication Year: 1994, Page(s):484 - 489
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    A novel design and analysis method for a 4th-order sigma-delta modulator (SDM or DSM) based on leapfrog topologies is presented. First, we discuss the arrangement of delayed and non-delayed type integrators for the leapfrog topologies and then determine a stable topology for analysis. Using the theoretical analysis including DC analysis and the relationship of roots and coefficients of an equation... View full abstract»

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  • Chip fabrication services for universities in North America and Europe

    Publication Year: 1994, Page(s):532 - 535
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    This paper reviews the chip fabrication services for universities in North America and European countries. One feature of these services is the adoption of a chip fabrication system (called Multiproject Chip) that makes it possible for users at universities to fabricate chips at an extremely low cost. The key idea of the multiproject chip system is that sharing a chip or a wafer among several proj... View full abstract»

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  • An efficient technique for the design of 2-D recursive digital filters with guaranteed stability

    Publication Year: 1994, Page(s):430 - 435
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    A technique is developed for designing two-dimensional (2-D) recursive digital filters with guaranteed stability. The filter is described by a 2-D rational transfer function which corresponds to a linear difference equation with either rectangular or triangular input and output masks. In the case of rectangular (triangular) input and output masks, the denominator polynomial is derived from the sta... View full abstract»

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  • Chirality in neural network systems

    Publication Year: 1994, Page(s):3 - 7
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The concept of chirality is introduced artificial neural network field separation methods of enantiomers. The separated chiral network shows a characteristic function in most cases, and the combination of the chiral subunits implements new functions View full abstract»

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  • A new fault simulator for large synchronous sequential circuits

    Publication Year: 1994, Page(s):466 - 471
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    A fault simulator for large synchronous sequential circuits is presented in this paper. There are four key ideas to the fault simulator. (1) It uses the critical path tracing method to screen out the single event faults that need not map into equivalent stem faults. (2) It uses the single fault propagation method to map the traced single event faults into equivalent stem faults. (3) All the multip... View full abstract»

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  • Optical fiber digital picture code and supervisory signal transmission system

    Publication Year: 1994, Page(s):352 - 357
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    This paper describes a digital signal transmission system using nine optical fibers for the picture code of 5 bits and supervisory signal of 3 bits, and using one optical fiber for the clock at 14.32 MHz, which is built based on the conventional digital TV signal transmission system consisting of a picture code of 8 bits with the clock at 14.32 MHz. Since the picture code and supervisory signals a... View full abstract»

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