Proceedings of ICICS, 1997 International Conference on Information, Communications and Signal Processing. Theme: Trends in Information Systems Engineering and Wireless Multimedia Communications (Cat.

12-12 Sept. 1997

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  • 1997 International Conference on Information, Communications and Signal Processing Theme: Trends in Information Systems Engineering and Wireless Multimedia Communications

    Publication Year: 1997, Page(s):i - xxxiv
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    Freely Available from IEEE
  • Author index

    Publication Year: 1997, Page(s):0_3 - 0_7
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    Freely Available from IEEE
  • Polynomial order reducing property of lattice filters in detection of linear FM signals

    Publication Year: 1997, Page(s):1382 - 1385 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Order-reduction techniques have already been successfully applied to the detection of linear FM signals in white noise. In this paper, reflection coefficients of adaptive lattice filters are used, in a new aspect, to reduce the order of input polynomial phase FM signals. This concept is then used to detect chirp signals in white noise. To define an appropriate hypothesis problem for the transforme... View full abstract»

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  • Wavelet neural network based transient fault signal detection and identification

    Publication Year: 1997, Page(s):1377 - 1381 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    This paper proposes a novel approach to detect and identify transient fault signals. Because the fault signals are non-stationary transient ones, the traditional signal analysis methods, such as the FFT, are not so efficient and useful for fault signal detection. A wavelet neural network (WNN) is used to extract the signal features, and then a feedforward neural network (FNN) is used to identify a... View full abstract»

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  • The EMMA multimedia conference service

    Publication Year: 1997, Page(s):1691 - 1695 vol.3
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    The complexity and diversity of novel telecommunication services require experimental systems for the exploration of research areas such as resource allocation and management. The aim of the paper is to introduce a multimedia conferencing service and to summarize its main benefits. This service is based on an experimental system, which deals with research issues both on the network and terminal si... View full abstract»

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  • Low-power design for real-time systems

    Publication Year: 1997, Page(s):1746 - 1750 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    This paper addresses the issue of low power design for real-time systems. We present a power reduction method at the software compilation level. Given a real-time program, an inter-instruction power reduction technique is proposed to transform the program to another one with lower power consumption. In addition, a scheduling algorithm for real-time operating systems is proposed to reschedule real-... View full abstract»

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  • Higher order statistics for the seismic wave identification

    Publication Year: 1997, Page(s):1372 - 1376 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    Seismic prospecting is used to identify the series of contrasts in the acoustic impedance associated with different formations in the subsoil. Generally, the second order statistics or spectral matrix of the recorded data is used. The eigenvectors of this matrix are partitioned into two orthogonal subspaces: the signal subspace and noise subspace. The problem of this method is the correlation betw... View full abstract»

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  • The integration of VOD and Internet services

    Publication Year: 1997, Page(s):1686 - 1690 vol.3
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    As the information super highway being constructed, many kinds of multimedia on demand services, attracting significant attention, is being tested, and will be realized sooner or later. Considering these social environments, we have implemented a video on demand system. This paper describes the system architecture of the implemented video on demand system, and proposes the efficient structure for ... View full abstract»

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  • New method for designing stable variable filters

    Publication Year: 1997, Page(s):1293 - 1297 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Digital filters with adjustable frequency-domain characteristics are called variable filters. Variable filters are used in many signal processing fields, but recursive variable filters are extremely difficult to design due to the stability problem. This paper proposes a new method for designing recursive one-dimensional (1-D) variable filters whose stability is always guaranteed. To guarantee the ... View full abstract»

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  • Computer, multimedia and television

    Publication Year: 1997, Page(s):1741 - 1745 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    This paper analyses the architecture features of PCs. Three levels of multimedia definition are proposed. The performances and platform features of PCs and TV for multimedia communication are compared. This results in a proposal of a digital TV (DTV) architecture that retains the good features of a PC but enhances the real-time bit stream processing capability. The key conclusion is that DTV is fo... View full abstract»

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  • Subband image coding using filter banks with non-uniform passband distribution

    Publication Year: 1997, Page(s):1368 - 1371 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    Subband filter banks with non-uniform passband distribution in frequency domain are studied. Several design examples are presented and compared with conventional uniform bandwidth filter banks. Image coding results show that filter banks with non-uniform bandwidth outperform filter banks with uniform bandwidth, especially in low bit rate coding View full abstract»

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  • Real time delivery and control mechanism of multimedia service between ATM network and Internet

    Publication Year: 1997, Page(s):1682 - 1685 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    This paper proposes the middleMEN (middlemen for Multimedia Environment) approach for a real time delivery and control mechanism of multimedia services between the ATM network and the Internet. MiddleMEN consists of the interworking unit and the service broker to provide a seamless multimedia service between the ATM network and the Internet. For a real time delivery of multimedia services between ... View full abstract»

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  • Linear approach to the least-squares multidimensional polynomial fitting

    Publication Year: 1997, Page(s):1288 - 1292 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    It is well known that the least-squares one-dimensional (1-D) polynomial fitting problem is linear. However, multidimensional (M-D) polynomial fitting is often treated as a nonlinear problem. This paper shows that the least-squares M-D polynomial fitting problem is also a linear problem, and proposes a linear method for solving it. Two fitting examples in the 2-D case are given to illustrate the e... View full abstract»

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  • Neural network approach to power transmission line fault classification

    Publication Year: 1997, Page(s):1737 - 1740 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    This paper presents a new solution to fault classification of high voltage transmission lines and shows its effectiveness in digital simulation on a realistic 500 kV power system. The scheme is based on backpropagation and Kohonen neural networks and a comparison between them is made. The Electromagnetic Transients Program (EMTP) is used to obtain fault patterns for the training and testing of neu... View full abstract»

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  • Subjective coding of best basis wavelet coefficients for multiresolution analysis

    Publication Year: 1997, Page(s):1363 - 1367 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (764 KB)

    This paper presents a wavelet based image compression algorithm using subjective thresholding and quantization of the wavelet coefficients. subjective compression techniques use the properties of the human visual system (HVS) to eliminate redundant information in an image. By combining the wavelet transform coefficients with psychovisual thresholding and quantization schemes, a coding result of 0.... View full abstract»

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  • A user interface device for domestic hypermedia

    Publication Year: 1997, Page(s):1677 - 1681 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    Traditional ways of interacting with hypermedia fail in a domestic setting because the user interaction devices typical of a desktop hypermedia system (mouse, keyboard, joystick, high resolution screen) are currently unavailable or are impractical in a domestic setting. We have investigated and prototyped an alternate interaction device based on a hand-held touchpad that we believe is practical in... View full abstract»

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  • Experimental research for processing of Choi-Williams distribution and Bessel distribution

    Publication Year: 1997, Page(s):1593 - 1597 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The view proposed here is that it is important to use a kernel properly, i.e., selecting a proper value of scaling factor and positioning a kernel at the right location in the ξ-τ plane. It is also important to obtain a priori information about a time-frequency distribution (TFD) of the signal being analyzed using the Fourier transform (FT) of the signal and taking the results of FT, togeth... View full abstract»

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  • Adaptive symbol-by-symbol reception of PSK on channels with unknown phase

    Publication Year: 1997, Page(s):1493 - 1495 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    We propose an adaptive symbol-by-symbol receiver for phase shift-keying (PSK) over the Gaussian channel with unknown carrier phase. The statistical properties of the carrier phase are assumed unknown to the receiver, other than the fact that it is slowly varying so that a piecewise-constant approximation can be made. The coherent reference for detection is obtained using a first-order filter whose... View full abstract»

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  • Implementation of silence compression scheme for G.723.1 speech coder using TI TMS320C51 DSP chip

    Publication Year: 1997, Page(s):1284 - 1287 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The International Telecommunication Union (ITU) silence compression scheme for dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s (Annex A) was designed for the ITU G.723.1 speech coder. Silence compression techniques are used to reduce the transmitted bit rate during silent intervals of speech. This paper describes the algorithm of voice activity detector (VAD... View full abstract»

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  • Characterization and source modeling of MPEG-2 VBR video source

    Publication Year: 1997, Page(s):1652 - 1656 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    This paper presents the results of our study on the statistical characterization of MPEG-2 VBR video stream and the modeling of such source. The frame trace, marginal distribution of the frame size and the high autocorrelation existing in the continuous frames are analyzed. An ARMA process is used to model MPEG-2 video source. The different frame types of MPEG-2 video are considered together by pe... View full abstract»

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  • A fully-balanced wide-frequency current-tunable all-pass filter

    Publication Year: 1997, Page(s):1732 - 1736 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A new integrable fully-balanced wide-frequency current-tunable all-pass filter is presented. The architecture of the circuit is relatively simple and provides symmetry with differential signals. The corner frequency is linearly tunable, through a bias current, over a wide-frequency sweep range of approximately three orders of magnitude. The maximum useful corner frequency is in excess of 112 MHz View full abstract»

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  • Measurement of blood pressure using wavelet transforms

    Publication Year: 1997, Page(s):1358 - 1362 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    This paper describes automatic blood pressure measurement for non-stationary subjects. The objectives include systolic and diastolic pressure measurements for a subject at rest, walking with arm held, and walking with arm swinging. The wavelet transform method was employed to process the blood pressure signals obtained using the auscultatory method. Detection techniques were developed to de-noise ... View full abstract»

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  • Low-cost 3D input device for next-generation user interface

    Publication Year: 1997, Page(s):1672 - 1676 vol.3
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    Many application areas that rely on truly interactive 3D computer graphics, need a 6 degree-of-freedom (DoF) input device for object manipulation and for navigation. Although there are methods for utilising devices with less DoF, they are less than ideal. Such devices with more than 2 DoF that exist are often expensive and do not satisfy the need to closely match the user's mental model. Our devel... View full abstract»

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  • Wideband array processing: characterization of the sources

    Publication Year: 1997, Page(s):1588 - 1592 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    The purpose of this paper is the DOA estimation of the wideband sources using an array of sensors. A fast subspace based method without eigendecomposition of the spectral matrix of the sensor array improved in the presence of the noise and extended to the wideband signals. New and fast transformation matrices are developed to construct the coherent signal subspace in the presence of the uncorrelat... View full abstract»

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  • A mobile communications application of time-varying higher order spectra to FM signals affected by multiplicative noise

    Publication Year: 1997, Page(s):1489 - 1492 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A new method for estimating the instantaneous frequency (IF) of mobile communication signals affected by Rayleigh multiplicative noise is proposed. The method is based on the use of time-varying higher-order spectra (TV-HOS) and particularly the Wigner-Ville trispectrum (WVT). The performance of the method is evaluated under the assumption of linear FM signals affected by stationary Rayleigh multi... View full abstract»

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