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
  • Nonlinear compensation using orthogonal inverses: broadband inputs and robustness issues

    Publication Year: 1996, Page(s):816 - 821 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    The performance of many analogue and digital signal processing systems is limited by nonlinear distortion which can be reduced by post-distortion compensation. Power series inverse based nonlinear compensation suffers from various limitations resulting from the coupling between the non-orthogonal elements used to represent the nonlinearity. This paper is concerned with an orthogonal nonlinear comp... 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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  • A stabilized zero-crossing representation in the wavelet transform domain and its extension to image representation for early vision

    Publication Year: 1996, Page(s):496 - 501 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (996 KB)

    We present a new stabilized zero-crossing representation with a salient feature that the signal reconstruction problem reduces to a typical minimum-norm optimization problem, the solution of which is formulated as a linear simultaneous equation, and develop an iterative algorithm for signal reconstruction. Moreover, we extend them to the two-dimensional case. With the extended two-dimensional reco... View full abstract»

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  • Stability of DSP-based constant tension control systems and data acquisition

    Publication Year: 1996, Page(s):810 - 815 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    A DSP-based control technique to constant tension control for the rewinding roll of a paper machine is presented. The proposed methodology makes use of a digital signal processing technique to investigate the stability of a multi-closed-loop control system and then partition its operating area into optimal working regions. A novel data acquisition method is introduced to obtain speed and tension f... View full abstract»

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  • Indicators of input contributions: comparing functional measures

    Publication Year: 1996, Page(s):520 - 525 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The problem of data encoding and feature selection for training backpropagation neural networks is well known. The basic principles are to avoid encrypting the underlying structure of the data, and to avoid using irrelevant inputs. In the real world we often receive data which has been processed by at least one previous user. The data may contain too many instances of some class, too few instances... View full abstract»

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  • Phase coupling detection using a finite number of realizations and non-independent phases

    Publication Year: 1996, Page(s):648 - 653 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Phase coupling detection and quantification by using the bispectrum is theoretically attractive and easy to understand. However some problems appear in practice, especially the bispectrum estimation on a finite (and small) trials number implies false phase coupling detection and bad quantification. Moreover the phase independence which is assumed, for each realization, is not always verified. So, ... View full abstract»

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  • A wavelet multiresolution and neural network system for BCG signal analysis

    Publication Year: 1996, Page(s):491 - 495 vol.2
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    Ballistocardiography (BCG) has an interesting feature that no electrodes are needed to be attached to the body during measurements. This provides a potential application to assess the patients heart condition in the home. Artificial neural networks (ANNs) have several properties that make them promising for the automatic signal classification problems. In the time domain of the BCG classification,... View full abstract»

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  • A state space approach to joint AOA and period estimation for a class of periodic discrete event processes

    Publication Year: 1996, Page(s):686 - 691 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    We examine the utility of a state space approach to pulse train signal modelling and address the problem of jointly estimating the angle of arrival (AOA) and periodicity of an intercepted radar pulse train signal. Kalman filter based techniques are developed and the mean square error performance of the estimators evaluated for two separate state space models. Robust methods are also suggested and ... View full abstract»

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  • A new center-biased orthogonal search algorithm for fast block motion estimation

    Publication Year: 1996, Page(s):874 - 877 vol.2
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    A new center-biased orthogonal search algorithm (CBOSA) for fast block-based motion estimation is proposed. The new algorithm uses a center-biased search point pattern, which is based on center-biased motion vector distribution characteristic of the real-world image sequences, for improving the performance of the conventional orthogonal search algorithm (OSA). Simulation results show that the prop... View full abstract»

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  • AOA measurement error under the antenna couplings

    Publication Year: 1996, Page(s):804 - 809 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    This paper reports the angle of arrival (AOA) measurement error due to the coupling of an antenna which is used for the frequency close to that under the measurement. The coupling of sensors which is ignored in most cases of acoustic problems is one of the essential effects for electromagnetic measurements. An example of this phenomena is observed with the AOA subsystem of an airborne collision av... View full abstract»

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  • Discrete wavelet transform techniques in speech processing

    Publication Year: 1996, Page(s):514 - 519 vol.2
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1560 KB)

    The trend towards real-time, low-bit-rate speech coders dictates current research efforts in speech compression. A method being evaluated uses wavelets for speech analysis and synthesis. Distinguishing between voiced and unvoiced speech, determining pitch, and methods for choosing optimum wavelets for speech compression are discussed. We observe that wavelets concentrate speech energy into bands w... View full abstract»

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  • Polynomial order reducing property of lattice filters for FM signals with polynomial phases

    Publication Year: 1996, Page(s):569 - 573 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The behaviour of the optimal and adaptive reflection coefficients of lattice filters for FM signals with polynomial phases of order p is investigated. It is theoretically shown that the optimal reflection coefficients form FM signals with lower order polynomial phases p-1. This new characteristic which is correspondingly held for the adaptive reflection coefficients is introduced as the polynomial... View full abstract»

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  • 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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  • 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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  • An iterative approach to the parametric estimation of chirp signals

    Publication Year: 1996, Page(s):681 - 685 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    This paper considers the problem of estimating the parameters of a chirp signal from a finite number of noisy discrete time observations. A new iterative method is proposed that proceeds in two steps where the first step consists of estimating iteratively the second order phase coefficient using a properly chosen lagged sequence. The resulting sequence is shown to be time series harmonic, the harm... View full abstract»

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  • Visualizing ultrasonic vector velocity using the motion without movement algorithm

    Publication Year: 1996, Page(s):870 - 873 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The visualization of ultrasonic vector velocity data is a non-trivial task. The data is five-dimensional: x, y, velocity magnitude, velocity direction, and time. Most techniques have so far failed to deliver an intuitive approach to displaying such complex data. The motion without movement technique uses time variations in phase to create the illusion of motion without moving the pattern to be dis... 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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  • Handwriting and bilevel graphics coding based on quadtree segmented block-run run-length coding

    Publication Year: 1996, Page(s):712 - 715 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    An efficient coding scheme for handwriting and bilevel graphics based on quadtree segmentation and block-run run-length coding (RLC) is presented. By segmenting a captured handwriting or graphic image into variable size blocks according to the image activity inside the blocks and run-length coding on a block-run basis, the proposed scheme is able to achieve higher coding efficiency than the conven... View full abstract»

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  • Two clustering algorithms and their application to motion segmentation

    Publication Year: 1996, Page(s):939 - 944 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    Two clustering algorithms have been developed for data classification where there exists no a priori knowledge about the number of clusters. One algorithm is based on robust statistics, while the another one was motivated by the N body problem of theoretical mechanics. The algorithms were applied to the problem of motion segmentation of image sequences, based on similarity in velocity space. Exper... View full abstract»

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  • Fingerprint compression using a modified wavelet transform and pyramid lattice vector quantization

    Publication Year: 1996, Page(s):798 - 803 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    A new compression algorithm for fingerprint images is introduced. A modified wavelet packet scheme which uses a fixed decomposition structure, matched to the statistics of fingerprint images, is presented. A technique for determining the most important coefficients is introduced. The algorithm uses both hard and soft thresholding schemes to make the procedure fast and efficient. The bit allocation... 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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  • 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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