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TENCON '96. Proceedings., 1996 IEEE TENCON. Digital Signal Processing Applications

29-29 Nov. 1996

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  • 1996 IEEE TENCON Digital Signal Processing Applications

    Publication Year: 1996, Page(s):0_3 - xii
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    Freely Available from IEEE
  • DSP-based testing system for A/D converters applying quantization theory

    Publication Year: 1996, Page(s):749 - 753 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    Classical testing procedures for A/D converters are based on mathematical methods that do not need large and expensive hardware resources. A number of works devoted to introducing new methodologies to test the ADC performance led, on the other hand, to powerful hardware systems in order to implement these tests in a reasonable time. However, these innovative methods, introducing the full dynamic t... View full abstract»

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  • Author index

    Publication Year: 1996, Page(s):0_11 - 0_14
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    Freely Available from IEEE
  • Self-certified identity information using the minimum knowledge

    Publication Year: 1996, Page(s):641 - 647 vol.2
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    We propose the new notion of self-certified identity information that applies the notion of self-certified public key to the case in which the public key is just the identity information. Using the notion of self-certified identity information, we propose a truly “paradoxical” identity-based identification scheme, the corresponding signature scheme which any user can choose his(her) ow... View full abstract»

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  • Quality monitoring in robotised welding using sequential probability ratio test

    Publication Year: 1996, Page(s):635 - 640 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    This paper addresses the problem of automatic monitoring the weld quality produced by robotised short arc welding. A simple statistical change detection algorithm for the weld quality, recursive sequential probability ratio test (SPRT), is used. The algorithm may equivalently be viewed as a cumulative sum (CUSUM) type test. The test statistics is based upon the variance of the amplitude of the wel... View full abstract»

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  • Analysis method of nonstationary waveform based on modulation model

    Publication Year: 1996, Page(s):630 - 634 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    This paper describes a new analysis method for nonstationary signals from the viewpoint of a waveform based on a modulation model. In this model, an instantaneous phase angle is considered to consist of two kinds of time-dependent parameters. The first is a smoothly rotating component and the second is a rapidly variable component. These two parameters enable us to analyze precise variations of no... View full abstract»

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  • An implementation of real-time hardware for moving object detection and discrimination

    Publication Year: 1996, Page(s):961 - 966 vol.2
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    In this paper, we introduce real-time hardware implemented for the purpose of detecting the boundary points of a moving object and discriminating it from non-targets, which are basic functions of an unmanned surveillance system. The implemented hardware is composed of the two parts; one is a hard-wired logic part which computes spatio-temporal derivatives, and the other is a discrimination part in... View full abstract»

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  • Digital-signal-processor-based multirate PID control of a two-link flexible-joint robot

    Publication Year: 1996, Page(s):900 - 905 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Multirate control has become an area of active research. Concurrent with the development of multirate strategies, there have been increasing applications of digital signal processors in high speed control. This paper presents the design and implementation of a multirate PID controller for a two-link flexible-joint robot. The controller is implemented using the TI Digital Signal Processor TMS320C30... View full abstract»

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  • Digital analysis of signal intensities

    Publication Year: 1996, Page(s):536 - 540 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    In this paper two algorithms for the power intensity and time-frequency characteristics of non-stationary signals are proposed, tested and compared to standard schemes. The first algorithm is based on the continuous time-frequency characteristic and the second is based on the discrete time-frequency characteristic. The performance of each algorithm is evaluated and compared to the existing standar... View full abstract»

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  • Statistical characterization of error sequences and its applications to error control

    Publication Year: 1996, Page(s):625 - 629 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    Average bit error rate is not a satisfactory descriptive feature for code evaluation, because it cannot precisely distinguish between the random and bursty natures inherent in error occurrences. In this paper we report new results of exploiting the statistical characterization of error sequences in the design of error control for mobile radio communications. For tracking the nonstationary evolutio... View full abstract»

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  • Block motion estimation based on spatio-temporal correlation

    Publication Year: 1996, Page(s):955 - 960 vol.2
    Cited by:  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    In this paper, we present a new motion estimation algorithm which determines an initial motion vector and defines a search window adaptively using the motion information of spatio-temporal neighborhood blocks. First, an initial motion vector based on spatio-temporal correlation of motion is predicted. Next, we define a search window adaptively using the Gibbs/Markov random field model. The propose... View full abstract»

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  • Specialised hardware for state space control of a dynamic process

    Publication Year: 1996, Page(s):895 - 899 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    This paper considers the use of an application specific integrated circuit (ASIC) for a stand alone controller. The ASIC estimates process-states and controls a dynamic process. As a case study, an inverted pendulum is used as the controlled process. The process is nontrivial and reflects several industrially related control problems. To control the inverted pendulum it is necessary to estimate th... View full abstract»

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  • Listening to musical rhythms with progressive wavelets

    Publication Year: 1996, Page(s):508 - 513 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (828 KB)

    Analysing and modelling the human perception of musical rhythm provides insights into non-verbal knowledge representation, quantification of musicological theories, and intelligent tools for music performance and composition. Linear phase Gabor transform wavelets are an analysis technique capable of making explicit many elements of musical rhythm theory. Transforms over a continuous time-scale pla... View full abstract»

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  • Signal classification by mutual information based discriminating pursuit

    Publication Year: 1996, Page(s):530 - 535 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    An algorithm called mutual information based discriminating pursuit is suggested for signal classification. With this algorithm a series of wavelets that carry meaningful information about class differences are chosen from wavelet packets. The coefficients obtained by decomposing signals onto these wavelets are exploited as pattern features for classification. The algorithm is tested with the clas... View full abstract»

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  • Code optimization method for DSPs with multiple memory addressing registers and its application to compilers

    Publication Year: 1996, Page(s):619 - 624 vol.2
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    A novel method to derive an efficient memory access pattern for a digital signal processor (DSP) of which memory is accessed only by address registers (ARs), is discussed. In such a DSP, some AR operations are performed very efficiently, and program codes with less overhead in memory accesses are derived by utilizing such AR operations as much as possible. By utilizing multiple ARs, further reduct... View full abstract»

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  • Cosine-modulated two-dimensional time-varying filter banks

    Publication Year: 1996, Page(s):828 - 833 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    Two-dimensional (2-D) filter banks are widely used for analysis and synthesis systems applied to subband coding of image. Time-varying filter banks that vary the structure of them appropriately for a local property of the signal have been studied for image data compression. In time-varying filter banks, each different part of the signal is processed with different filter coefficients or a differen... View full abstract»

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  • Implementation of half-pel precision motion estimator for MPEG2 MP@HL

    Publication Year: 1996, Page(s):949 - 954 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    A half-pel precision single chip motion estimator is described dedicatedly for MPEG2 MP@HL moving pictures. Adopting a two-level hierarchical searching algorithm and the maximum possible reuse mechanism of reference pixels, MP@HL motion estimation is successfully facilitated. The broadcasting type PE array is used both for integer-pel precision vector and half-pel precision vector search processes... View full abstract»

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  • Design of DSP-based controller for switching power converters

    Publication Year: 1996, Page(s):889 - 894 vol.2
    Cited by:  Papers (13)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    A quasi-linear control strategy for regulating DC/DC converters under wide parameter variation is implemented using a digital signal processor. The design of this DSP-based controller is presented in this paper. Since the control method allows real-time modification of control parameters according to the changing environment, the resulting control shows significant improvement in performance over ... View full abstract»

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  • Non-linear phase estimation by computer-aided Markov filtering method: accuracy investigations

    Publication Year: 1996, Page(s):758 - 762 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    The phase and intensity in interference pattern depend on each other nonlinearity. Therefore it is reasonable to minimize the phase errors immediately by nonlinear filtering of interferometric data series. We propose a nonlinear filtering (NLF) method based on the theory of Markov stochastic processes for accurate phase estimation of distorted phase-shifted interferometric data series. It is shown... View full abstract»

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  • Accurate time delay and Doppler stretch estimation in noisy environment

    Publication Year: 1996, Page(s):676 - 680 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A wavelet based wideband cross ambiguity function (WB-WBCAF) has been used in the context of joint estimation of the time delay and Doppler stretch between two received signals (radar and sonar). But in a noisy environment, the performance of the method deteriorates because the WBCAF is severely corrupted by the contamination. In order to provide accurate measurements of the time delay and Doppler... View full abstract»

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  • Some special wavelets with faster algorithms

    Publication Year: 1996, Page(s):502 - 507 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    In this paper, we attempt to design some new wavelet functions that can achieve a significant saving in terms of computation time when the corresponding wavelet decomposition algorithms are being implemented. The performance of these wavelets is evaluated rigorously and comparisons are also made with the Daubechies wavelets View full abstract»

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  • Non-stationary Gaussian signal classification

    Publication Year: 1996, Page(s):526 - 529 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    We present a new non-stationary signal classification algorithm based on a time-frequency distribution and multiple hypothesis testing. The time-frequency distribution is used to construct a time-dependent quadratic discriminant function. At selected points in time we evaluate the discriminant function and form a set of statistics which are used to test multiple hypotheses. We show that the statis... View full abstract»

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  • Affine parameter estimation with gradual segmentation

    Publication Year: 1996, Page(s):775 - 779 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    We propose an extraction method of the structural motion information for compact image representation. The advanced motion analysis needs segmentation and motion velocity information. Conventional segmentation methods by using edge detection with high-pass filtering tend to fall into over-segmentation. The morphological filter is used to obtain edge information avoiding the selection of small osci... View full abstract»

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  • Transform methods of PAM signals for asymmetric distribution in 3rd-order blind equalizer

    Publication Year: 1996, Page(s):614 - 618 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    In this paper, we have considered the 3rd order blind equalizer using symmetric to asymmetric transforms and asymmetric to symmetric transforms of PAM signals by the square root operation and reciprocal operation. The purposes of these transforms and 3rd order blind equalizations are (i) better mean square error (MSE) performances with less computational complexities than 4th order blind equalizer... View full abstract»

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  • New approach for beamforming in a coherent and incoherent environment

    Publication Year: 1996, Page(s):858 - 862 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    In beamforming applications the degrees of freedom or the maximum number of signals allowed, is an important number that will decide the number of sensors and the associated hardware components required to achieve the desired performance. A flexible algorithm that allows us to control the degrees of freedom depending on the environment in which it operates, is presented View full abstract»

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