Southeastcon '99. Proceedings. IEEE

25-28 March 1999

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Displaying Results 1 - 25 of 75
  • Proceedings IEEE Southeastcon'99. Technology on the Brink of 2000 (Cat. No.99CH36300)

    Publication Year: 1999
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    Freely Available from IEEE
  • Authors list

    Publication Year: 1999, Page(s):340 - 341
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    Freely Available from IEEE
  • Fast search algorithms for continuous speech recognition

    Publication Year: 1999, Page(s):36 - 39
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (300 KB)

    The most important component of a state-of-the-art speech recognition system is the decoder, or search engine. Given this importance, it is no surprise that many algorithms have been devised which attempt to increase the efficiency of the search process while maintaining the quality of the recognition hypotheses. In this paper, we present a Viterbi decoder which uses a two-pass fast-match search t... View full abstract»

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  • Implementation and analysis of speech recognition front-ends

    Publication Year: 1999, Page(s):32 - 35
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (256 KB)

    We have developed a comprehensive front-end module integrating several signal modeling algorithms common to state-of-the-art speech recognition systems. The algorithms presented in this work include mel-frequency cepstra, perceptual linear prediction, filter bank amplitudes, and delta features. The framework for the front-end system was carefully designed to ensure simple integration into speech p... View full abstract»

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  • A Unix-based speech data collection platform

    Publication Year: 1999, Page(s):29 - 31
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    It is highly desirable to collect speech data from the telephone network via a digital interface. This avoids an additional A/D conversion normally required by analog telephone data collection hardware. A popular solution to this problem is the use of a T1 line which offers 24 digital phone lines. The leading T1 interface for Sun workstations is a system developed by Linkon Corporation. Using the ... View full abstract»

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  • A comparison of audio compression transforms

    Publication Year: 1999, Page(s):253 - 257
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (332 KB)

    This paper provides a subjective quality analysis of transforms used in audio compression algorithms for a class of music signals. An analysis with the discrete wavelet packet transform (DWPT) compares performances of an eight-level non-uniform critical-band frequency split versus a five-level uniform subband frequency split used in MPEG. Another analysis compares the performances of the DWPT vers... View full abstract»

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  • Determining the effect of sidelobe structure on angle of arrival measurements using monopulse techniques

    Publication Year: 1999, Page(s):319 - 322
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (212 KB)

    The sidelobe structure of a transmitting antenna can cause errors of angle-of-arrival (AOA) measurements by a receiving antenna. This paper addresses the conditions necessary for these measurement errors to occur by examining sidelobe data for three antennas. In addition, a maximum limit on the possible AOA measurement errors is determined View full abstract»

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  • Portable speech recognition system for the hearing and speech impaired

    Publication Year: 1999, Page(s):25 - 28
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (224 KB)

    This paper discusses the design and development of a portable, calculator size speech recognition system. The system is targeted primarily to enable the speech and hearing impaired to communicate via voice. However, many other related applications are possible for this device, particularly its potential for use in communications over phone lines View full abstract»

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  • Past and present methods for computing the dielectric constant of lattices of spheres

    Publication Year: 1999, Page(s):249 - 252
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (280 KB)

    The computation of the effective electromagnetic material parameters for a composite material is a complex and well-visited problem. For collections of spheres in a static field, the celebrated Clausius-Mossotti equation provides extremely good dielectric constant values when mutual interaction between particles is negligible. When mutual coupling is not negligible and identical spheres are arraye... View full abstract»

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  • Extending ESPRIT algorithm by using virtual array and Moore-Penrose general inverse techniques

    Publication Year: 1999, Page(s):315 - 318
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (248 KB)

    High-resolution signal parameter estimation is frequently studied in many signal processing applications. In this paper, we present a new high-resolution direction and frequency simultaneous estimation algorithm, which extends the ESPRIT algorithm by using the Moore-Penrose general inverse and virtual array techniques. By using this new algorithm, the parameter pair (θi,fi View full abstract»

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  • A novel MIMO fuzzy model

    Publication Year: 1999, Page(s):21 - 24
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (248 KB)

    A novel method for the construction of multi-input-multi-output (MIMO) fuzzy logic systems is proposed. A training algorithm for this MIMO fuzzy model, based on the backpropagation (BP) technique, is also given. Comparing to the conventional modeling method, the MIMO fuzzy model described is less complex due to a smaller number of adjustable parameters. Besides, its training time is decreased as m... View full abstract»

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  • The quasistatic analysis of a new modified coplanar coupling waveguide

    Publication Year: 1999, Page(s):246 - 248
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (128 KB)

    A new modified coplanar coupling waveguide is analyzed by using exact and approximate conformal mapping techniques. The closed-form expressions of the effective dielectric constant and characteristic impedance of the structure are derived. Numerical results that show the properties of the structure are presented View full abstract»

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  • Video communication system using portrait animation

    Publication Year: 1999, Page(s):309 - 314
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (528 KB)

    Novel video and speech communication schemes are investigated for implementing a chat-style communications system that can be applied to mobile communications environments characterized by limited terminal performance and transmission throughputs. A method is developed of automatically generating simplified portraits that capture the essence of a person's unique facial features from photos taken w... View full abstract»

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  • Approximating state sets using circumscribing polyhedron with fewer facets

    Publication Year: 1999, Page(s):14 - 20
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (464 KB)

    A polyhedron can be described using a set of linear constraints that bound the polyhedron. This paper considers the problem of approximating a polyhedron with a circumscribing polyhedron with fewer constraints. We discuss three methods to find such a circumscribing polyhedra, and compare the resulting approximation errors using sets of randomly generated polyhedra. The work is motivated by the pro... View full abstract»

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  • Linear discriminant analysis for signal processing problems

    Publication Year: 1999, Page(s):78 - 81
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (260 KB)

    Linear discriminant analysis (LDA) and principal components analysis (PCA) are two common techniques used for classification and dimensionality reduction. These techniques typically use a linear transformation which can either be implemented in a class-dependent or class-independent fashion. PCA is a feature classification technique in which the data in the input space is transformed to a feature ... View full abstract»

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  • Enhanced light emission from a silicon n+pn CMOS structure

    Publication Year: 1999, Page(s):242 - 245
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (428 KB)

    A special Si n+pn CMOS technology compatible device has been designed and which yields an optical emission intensity 2 nW per 2 micron diameter of chip area. The electrical-to-optical conversion efficiency is 1.5×106 which is nearly three orders of magnitude higher than previously published values for Si LED devices that operate in the avalanche mode. The design of the ... View full abstract»

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  • A programmable logic device based resolver simulator [for motor control]

    Publication Year: 1999, Page(s):159 - 164
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (448 KB)

    In high-speed, high-performance motor control systems, a common motor shaft angular position sensor is a resolver. A circuit is described that simulates the behavior of a resolver attached to a rotating electrical machine turning at constant speed. The circuit simulates the resolver in the sense that it has the same outputs and utilizes the same inputs. The machine speed being simulated is program... View full abstract»

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  • Dynamic system control using slack descriptor models

    Publication Year: 1999, Page(s):67 - 69
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (200 KB)

    Various techniques have been developed for controlling dynamic systems subject to model or input uncertainties. The slack descriptor systems model proposed by Holloway (1993) addresses such uncertainties as well as systems that have observation cost (uncertainty due to lack of samples). Here we consider some preliminary approaches to the control of systems modeled by slack descriptors, and show si... View full abstract»

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  • A prototype unit for built-in self-test of analog circuits

    Publication Year: 1999, Page(s):221 - 224
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    The design, implementation, and operation of a prototype assembly used to evaluate and demonstrate a mixed-signal based built-in self-test approach for analog circuits is described. Experimental results obtained from testing benchmark circuits using the prototype assembly are presented to illustrate results that cannot be easily obtained from a simulation environment View full abstract»

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  • Determination of midband gain of Sallen-key filters

    Publication Year: 1999, Page(s):305 - 308
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (156 KB)

    This article discusses the definition and evaluation of midband gain for active filters with positive feedback and two widely separated poles. It is shown that two different definitions yield two different frequency responses. These responses differ by a factor of 0.04 db. The results of analytical expressions are checked with simulation. Agreement is excellent View full abstract»

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  • An artificial neural network for classifying and predicting soil moisture and temperature using Levenberg-Marquardt algorithm

    Publication Year: 1999, Page(s):10 - 13
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (344 KB)

    The purpose of this study was to design an artificial neural network that classifies soils and quantitatively predict the soil moisture and temperature in a given soil type based on the remotely sensed data. Two different training algorithms, viz., backpropagation (BP) and Levenberg-Marquardt (LM), were employed. The accuracy of the networks studied ranged from 96.68 to 98.8%. The networks trained... View full abstract»

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  • A scale and rotation insensitive algorithm for label location and identification

    Publication Year: 1999, Page(s):264 - 267
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    Image recognition is crucial for today's unmanned reconnaissance vehicles. This paper focuses on an image recognition algorithm designed to be insensitive to scaling and rotation. In addition the algorithm runs in real-time and functions well at low resolutions. The problem of locating and identifying toxic waste labels using an unmanned vehicle is discussed and used as an example for how this alg... View full abstract»

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  • Congestion prevention technique for ATM networks

    Publication Year: 1999, Page(s):86 - 91
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (504 KB)

    ATM networks do not operate in an effective and stable way without preventing congestion. Traffic management is concerned with the design of mechanisms which ensure that the network bandwidth, buffer and resources are efficiently utilized, while meeting the various quality of service (QoS) guarantees given to sources as part of a traffic contract. In this paper, a new and improved congestion contr... View full abstract»

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  • Object-oriented design with competing metrics

    Publication Year: 1999, Page(s):169 - 172
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (332 KB)

    It is claimed that while metrics quantify processes, competing metrics can capture future processes that will control the life-cycle of a designed system. To illustrate the issue, the basic premises of collaborative enabling technology are considered as the system design environment. In this case, capturing competing metrics is done on human functioning spaces. The earned capability of the system ... View full abstract»

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  • In-system reprogrammable (ISR) units provide dynamic online automation and control

    Publication Year: 1999, Page(s):74 - 77
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (200 KB)

    In modern control systems, there is a tremendous demand and requirement to implement the necessary control dynamically and also remotely. In addition, with the availability of the programmable devices such as complex programmable logic devices (CPLD) and field programmable gate arrays, it is now possible to design the systems with these type of devices and reprogram them online from remote locatio... View full abstract»

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