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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
  • 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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  • 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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  • 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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  • 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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  • Convergence layer: MCS over RMP

    Publication Year: 1997, Page(s):1405 - 1409 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    We present a convergence layer protocol enabling the multipoint communication service (MCS) protocol to run over the multipoint transport protocol. This protocol structure makes the MCS protocol execute on peer to peer transport protocol and multicast transport protocol at the same time. For doing this, the convergence layer determines whether the peer MCU is multicast capable during the connectio... View full abstract»

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  • Near- intermediate- and far-electric field signal processor for microwave landing systems

    Publication Year: 1997, Page(s):1266 - 1269 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    This paper presents a method for imaging an aircraft landing along a curved trajectory. An identification of the size of the aircraft and its angular position are obtained from the electric fields scattered. The three distinguishable features inherent to the electric field are also exploited. The development of a signal processor to track the bank and pitch attitude angles of the aircraft from the... 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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  • Low frequency coefficient prediction for image coding

    Publication Year: 1997, Page(s):1580 - 1584 vol.3
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    It has been shown that about 80% of the DC coefficients of a transformed image can be discarded at the encoder and then restored at the decoder using a DC coefficient restoration (DCCR) algorithm. This approach can improve the compression rate of JPEG by over 10% at low bit rates. We extend the DCCR algorithm not only to restore the DC coefficients but also to predict some of the (0, 1)th and (1, ... 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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  • Array antenna schemes with different polarization for reducing the fast fading in a microcell

    Publication Year: 1997, Page(s):1727 - 1731 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    This paper proposes array antenna schemes and combining schemes for polarization diversity to reduce the fluctuating range of fading signals in a microcellular environment. To analyze the propagation characteristics of proposed schemes, the spatial correlation coefficient of the received signal, fading signal distribution, level crossing rate and the average fade duration are investigated. The sim... View full abstract»

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  • Time delay estimation at multi-path based on symmetry measure of GCC function

    Publication Year: 1997, Page(s):1401 - 1404 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    An improved time delay estimator based on the symmetry measurement of the generalised cross-correlation (GCC) function is proposed. At a strong reverberation case, multiple peaks are chosen from the GCC function and the peak with the best symmetry measure is determined as the time delay estimate. Computer simulation results in a room environment for different source locations show the significant ... View full abstract»

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  • Least required bandwidth in VP-based ATM networks

    Publication Year: 1997, Page(s):1504 - 1507 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    In an ATM network, a virtual path (VP) is a labeled path which can be used to transport a bundle of virtual connections (VCs) and to manage the resources used by these connections. The ATM multimedia leased line service is provided across user-to-user VPs. The customers can increase/decrease the VP bandwidth according to their demand. This paper proposes a method to derive the least required bandw... View full abstract»

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  • Use of chaotic modeling for transmission of EEG data

    Publication Year: 1997, Page(s):1262 - 1265 vol.3
    Cited by:  Papers (2)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    A method based on chaotic modeling for compression and transmission of EEG data is presented. It is assumed that the data to be transmitted is chaotic and is generated by an E-dimensional nonlinear system. The flow in the E-dimensional space is obtained from the one dimensional time series using the process of time delay embedding. Then a simple, linear model is fitted for this flow in the E-dimen... 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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  • Mobile communications signalling system

    Publication Year: 1997, Page(s):1786 - 1789 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    This paper investigates the signalling traffic characteristics of a cellular mobile radio communications system by developing an analytical model and corroborating this model against simulations. In particular, we focus on the signalling traffic between the base station (BS) and the mobile switching centre (MSC), thereby quantifying the intensity of the signalling traffic and the requirements of t... 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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  • Causality considerations for missing data reconstruction in image sequences

    Publication Year: 1997, Page(s):1575 - 1579 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    The 3D autoregressive (AR) model with a non-causal support region has been successfully employed in the reconstruction of texture and missing regions in image sequences. This paper discusses the causality considerations when selecting the reconstruction model. When a distorted area to be reconstructed is large, a substantial computational load reduction can be obtained by implementing a predictor ... View full abstract»

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  • Performance evaluation of a dynamic video resolution control scheme in media-synchronized video and audio communications

    Publication Year: 1997, Page(s):1642 - 1646 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB)

    This paper studies a congestion control scheme in integrated variable bit-rate (VBR) video, audio and data (e.g., image or text) communications, where each video stream is synchronized with the corresponding audio stream. When the audio and-video streams are output, media-synchronization control is performed. To avoid congestion, we employ a dynamic video resolution control scheme which dynamicall... View full abstract»

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  • Queueing priority channel assignment scheme for handoff in CDMA cellular system

    Publication Year: 1997, Page(s):1766 - 1770 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    A new queueing priority channel assignment scheme for handoff in the CDMA cellular system is proposed and analyzed. The proposed scheme employs a dynamic priority queueing discipline instead of first-in first-out (FIFO), which differs from the previous ones. Also, the performance of this scheme is evaluated by computer simulation, and it is compared with that of the non-prioritized call handling a... 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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  • Design and implementation of fast antenna tuners for HF radio systems

    Publication Year: 1997, Page(s):1722 - 1726 vol.3
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    A description of fast HF antenna tuners from the functional and implementation standpoint is presented. The realized fast antenna tuner is specially useful for mobile or transportable HF radio system applications, including adaptive communications, frequency hopping and electronic countermeasures. This study comprises: the equipment design requirements, the basic configuration of the fast antenna ... View full abstract»

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  • Time delay estimation using higher-order statistics: a set of new results

    Publication Year: 1997, Page(s):1397 - 1400 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    The problem of time delay estimation of Gaussian and non-Gaussian signals is considered. Different kinds of corrupting noises are studied and three new methods are proposed which are based on higher-order statistics of the received signals. Computer simulations show that the new methods outperform the generalized cross-section and bispectrum-based methods View full abstract»

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  • Multimedia data parsing and reassembling for the zCAS (Collaborative-works Assistant System) under group environments

    Publication Year: 1997, Page(s):1663 - 1667 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    Multimedia data have a huge volume, that give rise to problems for real-time cooperative-work services, such as media sharing, media browsing, network traffic and delay control, and the user response for media processing. Many research activities have improved the service quality, but these approaches are file-based. Our method is not a file-based but a segment-based processing. In this study, the... View full abstract»

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