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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
  • A new motion compensation algorithm in DCT domain for H.261 video encoder

    Publication Year: 1996, Page(s):867 - 869 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    This paper proposes a method to improve the H.261 video encoder by using a new motion estimation (ME) algorithm instead of the full search block matching motion estimation algorithm (BMA). We thought that the traditional BMA based on the least square error or absolute error criterion may not be suitable for the H.261 video encoder. A good matching criterion should consider not only the interframe ... View full abstract»

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  • Fractal image compression with adjacent block parameter estimation

    Publication Year: 1996, Page(s):793 - 797 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1436 KB)

    Fractal image coding has been successfully applied to encode digital images at low bit rates. The usual coding technique is to partition a given image into a number of blocks (range blocks). Each block of the partition is expressed as the contractive transformation of another part of the image. However, such scheme does not take into account of the local smoothness in most images. We propose a nov... View full abstract»

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  • Fast system identification algorithm for non-uniformly sampled noisy biomedical signal

    Publication Year: 1996, Page(s):559 - 564 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The recently developed generalized linear least squares (GLLS) algorithm has been found very useful in non-uniformly sampled biomedical signal processing and parameter estimation. In this paper, the algorithm is used for the identification of a compartmental model with a pair of repeated eigenvalues based on the nonuniformly sampled noisy data. A case study is presented, which demonstrates that th... View full abstract»

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  • 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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  • Multi-resolution motion estimation at low bit-rates

    Publication Year: 1996, Page(s):863 - 866 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The performance of multi-resolution motion estimation schemes in low bit-rate video coding are presented. Video frames are individually wavelet decomposed and motion activity is detected using variable block size multi-resolution motion estimation (MRME) schemes. The residual frames are coded using zero tree quantization, followed by arithmetic entropy coding. The MRME schemes are shown to exploit... View full abstract»

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  • Scalable coding of subband images with quadtree-based classified vector quantization

    Publication Year: 1996, Page(s):788 - 792 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (724 KB)

    Scalable coding is useful when a variety of resolutions are simultaneously required or when resilience to errors is necessary. This paper describes spatial and SNR scalable coding schemes which are based on subband coding with quadtree-based classified vector quantization. It is expected that the proposed scalable coding techniques can be efficiently adapted for simulcast coding and error resilien... View full abstract»

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  • Time-frequency analysis of heart sounds

    Publication Year: 1996, Page(s):553 - 558 vol.2
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    From a study of the physical characteristics of heart sounds and human hearing capabilities, it is seen that only the highly trained ear may be able to detect heart sounds events. Also from a study of heart sound signals nature and the frequency domain analysis based on direct application of the Fourier transform technique, it is seen that this technique is inappropriate because important time eve... 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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  • 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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  • A fast algorithm suitable for DCT implementation with integer multiplication

    Publication Year: 1996, Page(s):784 - 787 vol.2
    Cited by:  Papers (3)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    The discrete cosine transform (DCT) has wide applications in speech and image data compression. We propose a novel fast DCT algorithm. The proposed algorithm is based on the symmetric property of the DCT kernel matrix. This decomposes an N-point DCT into an N/2-point DCT and can be iterated further. Because it has fewer multiplication steps, when converting the algorithm into hardware implementati... View full abstract»

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  • Video enhancement based on global segmentation representation of image motion

    Publication Year: 1996, Page(s):706 - 711 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    We present image processing algorithms for the generic temporal integration video enhancement approach based on the global segmentation representation of the motion, and demonstrate their usefulness by experimental simulations. As a specific case, here we take up the interlace-to progressive scan conversion problem, from the interlaced-to-progressive transform along the line of the temporal integr... View full abstract»

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  • Fast direct methods for Toeplitz least squares problems

    Publication Year: 1996, Page(s):743 - 748 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    Least squares estimations have been used extensively in many applications system identification and signal prediction. These applications, the least squares estimators can usually be found by solving Toeplitz least squares problems. We present fast algorithms for solving the Toeplitz least squares problems. The algorithm is derived by using the displacement representation of the normal equations m... View full abstract»

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  • Low cost method to obtain clutter data for space time adaptive processing studies utilising an existing radar platform

    Publication Year: 1996, Page(s):840 - 845 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    The most difficult area related to validating space time adaptive processing (STAP) algorithms is the generation of simulated input signals to the multi-channel radar system that adequately models the realistic clutter levels for airborne radar. In order to build an operational STAP system to collect data, several hardware developments including expensive well-matched receivers, fast high-dynamic-... View full abstract»

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  • 3-D image reconstruction of brain vessels from angiograms

    Publication Year: 1996, Page(s):547 - 552 vol.2
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    This paper presents a reconstruction process to build the three-dimensional cerebral vessel tree from a pair of DSAs (digital subtraction angiograms). To segment the blood vessels from the background, the local thresholding and global thresholding was used to bilevel the input image. Thinning is applied to obtain the skeleton of the vessels. The B-spline curve is used to smooth the skeleton. The s... View full abstract»

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  • Image coding with wavelet software package using lattice quantization

    Publication Year: 1996, Page(s):602 - 607 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (996 KB)

    An application of lattice quantization for encoding the wavelet coefficients of grey scale images is examined. The wavelet expansion is performed using a wavelet software package. We formally show that lattices give rise to optimal or near optimal quantizers for wavelet coefficients. The theoretical considerations are supported by a number of simulation experiments View full abstract»

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  • Slant manipulation and character segmentation for forensic document examination

    Publication Year: 1996, Page(s):933 - 938 vol.2
    Cited by:  Papers (1)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    This paper presents some research work that has been undertaken in the area of software tools for forensic document analysis. The purpose of research into this area is to study the methods used by human experts in the forensic analysis and examination of questioned hand-written documents and to formulate computer tools to assist in this task. The computer tools needed will require image processing... 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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  • 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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  • 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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  • A multiple SIMD approach to radar signal processing

    Publication Year: 1996, Page(s):852 - 857 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    Next generation radar systems, with phase-controlled array antennas, will have to process data that is many times larger than in current systems. This requires an enormous computing power. Even in a relatively small airborne radar system, with hard size and power consumption constraints, a sustained computing power of 40 GOPS (or 40 GFLOPS, if floating point calculations are used) will be needed t... View full abstract»

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  • 2-dimensional motion-analysis in object-oriented coding

    Publication Year: 1996, Page(s):945 - 948 vol.2
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    This paper describes a motion analysis algorithm in the object-oriented coding for video sequences and objects in the two consecutive frames of the video sequence are assumed to have moved in translational motion only. It incorporates the knowledge of the border coding process which exploits the temporal redundancies between successive image frames. After segmentation, the boundary information of ... View full abstract»

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