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

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
  • Technologies for personal communications

    Publication Year: 1994
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (39 KB)

    Summary form only given, as follows. Portability of services is one of the key elements of personal communications since it will enable us to communicate with everyone, anytime and anywhere. Mobile communications are reviewed in conjunction with radio and network technologies. The most important and often overlooked condition-customer requirements-is discussed by comparing the cordless phone and c... View full abstract»

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  • Audio visual coding technologies and LSI circuits based on MPEG2 standard to implement multimedia services

    Publication Year: 1994
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (34 KB)

    Summary form only given, as follows. Standardization of MPEG2 has been almost completed and it is expected to be the most important technology for fascination multimedia services in telecommunication, broadcasting and interdisciplinary services areas. The MPEG2 coding algorithm for video and audio signals is outlined and the main features of the MPEG2 standard are presented. The LSI technology req... View full abstract»

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  • Artificial neural networks-learning and generalization

    Publication Year: 1994
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (75 KB)

    Summary form only given. This presentation is intended to address issues that are related to learning and generalization capability of ANN. It is also intended to examine the state-of-the-art and, hopefully, stimulate discussions on where research should be directed. A survey on recent developments in supervised and unsupervised learning is given. Details of both learning strategies are elaborated... View full abstract»

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  • Modeling, simulation and layout synthesis for giga scale CMOS VLSI

    Publication Year: 1994
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (57 KB)

    Summary form only given, as follows. With continuing proliferation of CMOS technology, we are approaching the era of giga-scale VLSI integration with lower power requirement. It would not be surprising to any member of the VLSI community that the validity of many CAD models become obsolete in the deep submicron technology. Also, the required chip complexity increases faster than what designers can... View full abstract»

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  • Author index

    Publication Year: 1994
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    Freely Available from IEEE
  • An implementation of high-speed adaptive noise canceller with parallel block structure

    Publication Year: 1994, Page(s):376 - 381
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    An adaptive algorithm for detecting a single sinusoid of unknown frequency corrupted by Gaussian noise has been proposed by Nishimura et al. using IIR bandpass filter with a variable center frequency[1] . The filter has the parallel block structure for fast processing. However, the algorithm has two problems: one is that it has several input frequencies making it impossible to converge;... View full abstract»

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  • A versatile current-mode biquad using operational amplifiers

    Publication Year: 1994, Page(s):591 - 596
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    A versatile current-mode biquad filter using three operational amplifiers and 9 passive elements is proposed. By the suitable choice of the output branch, lowpass, bandpass, highpass, bandstop and allpass transfer functions are realized simultaneously without changing the circuit configuration and elements. Two circuits, one is for low frequency application and the other for high frequency, are pr... View full abstract»

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  • A module structured recurrent neural network capable of memorizing and regenerating dynamics

    Publication Year: 1994, Page(s):8 - 12
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    In this report, a module structured recurrent neural network whose size is adaptively determined in a learning process is proposed. The network has the ability to memorize and regenerate any waveforms. In particular, this report shows any periodical waveforms can be approximated by using the minimum number of elementary modules. This network is constructed by adaptive oscillating modules. The adap... 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 (6)  |  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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  • Optimized secondary path modeling technique for active noise control systems

    Publication Year: 1994, Page(s):370 - 375
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    This paper presents a secondary path modeling technique for active noise control (ANC) systems. The optimum delay for the adaptive prediction error filter to reduce the interference in system modeling is derived. This delay is determined by the length of the impulse response of the secondary path to be modeled. The modeling technique developed in this paper can be applied for both on-line and off-... View full abstract»

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  • A current-feedback transconductance amplifier for high-frequency filtering

    Publication Year: 1994, Page(s):587 - 590
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    This paper presents the derivation and analysis for a novel CMOS transconductance amplifier circuit. The structure combines previously developed current-feedback and linearized gm circuits. By properly biasing MOS transistors, improvements in linearity as well as current-to-transconductance efficiency are verified. Analytical and simulation results have shown the newly derived structure is suitabl... 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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  • Symmetric properties of 2-D sequences and their applications for designing quadrantally symmetric linear-phase 2-D FIR digital filters

    Publication Year: 1994, Page(s):436 - 440
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    In this paper, various symmetric and antisymmetric 2-D sequences are used to design quadrantally symmetric/antisymmetric 2-D filters. It is shown that there are sixteen types cases to be considered according to the symmetry/antisymmetry of 2-D sequences in both directions and their filter lengths (even or odd) 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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  • Channel noise filtering for subband image coding using vector quantization

    Publication Year: 1994, Page(s):630 - 635
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    In this paper, we design a post-filter for the subband coding of images using vector quantization. The purpose of this filter is to remove the inevitable channel noise after the compressed image is transmitted across a channel. We first proposed two simple schemes to detect the edges and channel noises in the subbands based on the image and subband characteristics. Then the noise corrupted subband... 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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  • Design of clustering analyzer based on systolic array architecture

    Publication Year: 1994, Page(s):67 - 72
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    This paper presents a systolic architecture for the squared-error clustering algorithm. The proposed architecture exploits a 2-dimensional systolic array which uses intensively parallel and pipelined processing. The architecture dramatically reduces the huge number of processing elements required by previous architectures. Furthermore, the same organization can be utilized for applications where t... View full abstract»

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  • A practical all-path timing-driven place and route design system

    Publication Year: 1994, Page(s):560 - 563
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    We have developed a practical timing-driven design system that achieves 17% cycle time improvement with only up to 32% run time penalty, and as low as 1% area overhead in real, 5000-7000-cell designs. This system is based on a Slack Graph concept that efficiently and effectively represents all-path timing constraints and allows optimal trade-off between timing and die size 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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  • Hardware sharing in tree-structure QMF banks

    Publication Year: 1994, Page(s):85 - 90
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    In this paper, a hardware sharing method for multirate systems is presented. Using the proposed method, we successfully designed the architecture of a tree-structured quadrature mirror filter (QMF) bank, which can also be used to implement discrete wavelet transforms. The features of the resulted shared architectures are that they keep the same topology of the original non-shared one and requires ... 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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  • CMOS implementation of neural networks for speech recognition

    Publication Year: 1994, Page(s):513 - 518
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    In this paper, a Spatiotemporal Probabilistic Neural Network (SPNN) is proposed for spatiotemporal pattern recognition. This new model is developed by applying the concept of Gaussian density function to the network structure of the SPR (Spatiotemporal Pattern Recognition). The main advantages of this new model include faster training and recalling process for patterns, and the overall architectur... View full abstract»

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  • Datapath scheduling for conditional resource sharing

    Publication Year: 1994, Page(s):169 - 174
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    A new approach is described for the datapath scheduling of behavioral descriptions containing nested conditional branches of arbitrary structures. This paper formulates a time-constrained scheduling problem as a 0-1 integer programming problem, in which each constraint is expressed in the form of a Boolean function, and a satisfiability problem is defined by the product of the Boolean functions. A... View full abstract»

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  • A 1.5 V 10 MHz BiCMOS quasi-digital vector modulator for wireless communication IC

    Publication Year: 1994, Page(s):218 - 219
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    This paper presents a 1.5 V 10 MHz quasi-digital vector modulator using low-voltage BiCMOS dynamic logic circuit and digital-to-analog converter for wireless communication IC. Based on a 1 μm BiCMOS technology, the 1.5 V quasi-digital vector modulator shows a total harmonic distortion of 20.7% at a carrier frequency of 10 MHz View full abstract»

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