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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 3 • June 1983

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Displaying Results 1 - 25 of 48
  • [Front cover and table of contents]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • Rational modeling by pencil-of-functions method

    Publication Year: 1983, Page(s):564 - 573
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (820 KB)

    Pole-zero modeling of signals, such as an electromagnetic-scatterer response, is considered in this paper. It is shown by use of the pencil-of-functions theorem that a) the true parameters can be recovered in the ideal case [where the signal is the impulse reponse of a rational function H(z)], and b) the parameters are optimal in the functional dependence sense when the observed data are corrupted... View full abstract»

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  • Comments on "The reconstruction of a multidimensional sequence from the phase or magnitude of its Fourier transform"

    Publication Year: 1983, Page(s):738 - 739
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (259 KB)

    When one imposes a nonnegativity constraint, one usually can reconstruct a two-dimensional sequence of finite support from the modulus of its Fourier transform using an iterative algorithm, even when file initial estimate is an array of random numbers. View full abstract»

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  • [Back cover]

    Publication Year: 1983, Page(s): c4
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    Freely Available from IEEE
  • A formant estimating equation useful in a graphically controlled speech synthesizer

    Publication Year: 1983, Page(s):736 - 738
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    A problem encountered in controlling a digital speech synthesizer using a digitizing surface is mapping the necessary controls into a two-dimensional space. The first two formant frequencies are readily associated with the x and y dimensions of the tablet surface, but higher formants must either be fixed or estimated based on the first two. This correspondence describes a method for estimating the... View full abstract»

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  • Electroacoustic analysis and enhancement of alaryngeal speech

    Publication Year: 1983, Page(s): 785
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    First Page of the Article
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  • An approximation theoretic approach to maximum entropy spectral analysis

    Publication Year: 1983, Page(s):734 - 736
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    It is shown that the theory of best approximation in weighted mean square can be used to provide a mathematical foundation for the analysis and extension of the maximum entropy method of spectral analysis. View full abstract»

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  • An adaptive approach for time delay estimation of band-limited signals

    Publication Year: 1983, Page(s):780 - 784
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    This correspondence concerns the use of the Widrow's adaptive least-mean-square (LMS) adaptive filter algorithm [1] for estimating the time delay between two-sensor outputs. Theoretical bias and estimation error are discussed. This analytical study provides a clue for determining the most effective way of processing the received signals through the adaptive filter. Computer simulation results are ... View full abstract»

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  • Critical band analysis-synthesis

    Publication Year: 1983, Page(s):656 - 663
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    The formal derivation of a transformation which models the frequency selective properties (critical bandwidths) of the auditory system is developed. A parameterized family of constant-Q analysis-synthesis transform pairs is developed from a property of homogeneous functions. This formulation allows for a wide choice of selections for center frequencies, bandwidths, and filter shapes. A particular ... View full abstract»

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  • Finding the zeros of linear phase FIR frequency sampling digital filters

    Publication Year: 1983, Page(s):729 - 734
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The need for finding the zeros of FIR filters often arises in digital signal processing applications. If we want to convert linear phase finite-impulse response (FIR) filters into minimum phase FIR filters [1], [2], the problem of finding the zeros of the filter is encountered. This problem has been addressed in [3], but not solved. Here we introduce the idea of using frequency sampling filters fo... View full abstract»

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  • Approximate expressions for the output signal-to-noise ratios for two types of cross correlators with correlated bandpass inputs

    Publication Year: 1983, Page(s):740 - 742
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Thus far, analytical expressions have not been developed for the output signal-to-noise ratio of a polarity coincidence correlator when the noise is correlated between the input channels. Approximate expressions are developed here for the output signal-to-noise ratios for two types of cross-correlator systems- one being the polarity coincidence correlator with a hard limiter in each input channel ... View full abstract»

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  • A statistical approach to the design of an adaptive self-normalizing silence detector

    Publication Year: 1983, Page(s):678 - 684
    Cited by:  Papers (8)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    Silence detection is an important aspect of automatic speech recognition. In this paper a silence detector is described which classifies each frame of an utterance as being silent or nonsilent. No attempt is made to determine the endpoints of words. The silence detector is based upon a statistical test and has the properties that it is adaptive, self-normalizing, speaker independent, and script in... View full abstract»

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  • Desgin and comparative study of some sequential jump detection algorithms for digital signals

    Publication Year: 1983, Page(s):521 - 535
    Cited by:  Papers (67)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1312 KB)

    The purpose of this paper is to analyze the behavior of several jump detection algorithms when applied to the same real data (geophysical signals) and to compare these algorithms from different points of view: complexity, efficiency, robustness, and ability to characterize the detected jumps. Three types of algorithms are investigated: "filtered derivatives" detectors, cumulative sum (cusum) tests... View full abstract»

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  • A stochastic approach to optimal linear digital equalizers

    Publication Year: 1983, Page(s):775 - 780
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    This correspondence presents, from the stochastic point of view, a new method for the optimal design of linear digital equalizers using a quadratic performance index. It is well known that a Kalman filter can be used as an equalizer for a digital communication system. If the Kalman filter is applied, then it is useful that an optimal linear equalizer, which minimizes the mean-square error, can be ... View full abstract»

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  • On hard errors in RNS architectures

    Publication Year: 1983, Page(s):772 - 774
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The residue number system (RNS) has been shown to be effective in realizing high-speed algorithms and transforms. Due to the modular nature of the numbering system, any hard error can be disastrous. In this work, hard RNS random errors are modeled and experimentally verified. View full abstract»

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  • Performance model for square law detectors followed by accumulators and an ORing device

    Publication Year: 1983, Page(s):759 - 761
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A mathematical model is developed to characterize the performance of square law detectors followed by accumulators and an ORing device. The performance of a Gaussian signal in Gaussian noise is determined for a specified number of channels ORed. The ORing loss is computed as a function of the number of samples in the accumulator preceding the ORing device for various fixed input signal-to-noise ra... View full abstract»

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  • Integration and signal-to-noise ratio requirements for a signal processing system containing an ORing device

    Publication Year: 1983, Page(s):650 - 656
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    Often it is not feasible to display all the data produced by many signal processing systems. It is desired to reduce the amount of data displayed and to reduce the amount of hardware needed. One technique that provides a reduction of data is ORing, a process where one picks that single channel with the most energy. This paper provides an analysis of a system composed of square law detectors follow... View full abstract»

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  • Minimum-variance and maximum-likelihood recursive waveshaping

    Publication Year: 1983, Page(s):599 - 604
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    In this paper, we develop optimal recursive waveshaping filters in the framework of estimation theory and state-variable models. We develop a linear minimum-variance waveshaper and a nonlinear maximum-likelihood waveshaper. Both waveshapers consist of two components: 1) stochastic inversion and 2) waveshaping. The former is performed by means of minimum-variance deconvolution. Simulations are give... View full abstract»

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  • Restoring lost samples from an oversampled band-limited signal

    Publication Year: 1983, Page(s):752 - 755
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    When a band-limited signal is sampled at its Nyquist rate, each sample is independent. When sampled in excess of that rate, the samples become dependent. Thus, if one or more samples are lost, they can be recovered from the remaining known values. Using Gerchberg's iterative algorithm applied to interpolation, we derive a closed form expression by which a finite number of data points can be regain... View full abstract»

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  • Improving resolution for autoregressive spectral estimation by decimation

    Publication Year: 1983, Page(s):630 - 637
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    In this paper we present a method for efficiently improving the resolution of autoregressive spectral estimation algorithms. We derive the exact autoregressive spectrum for K complex sinusoids in additive white noise. From this equation resolution boundaries are constructed which give the resolution in terms of the model order and the signal-to-noise ratio. Simulation results are used to compare t... View full abstract»

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  • Digital integrators using optimal FIR compensators

    Publication Year: 1983, Page(s):726 - 729
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    An important class of digital integration algorithms is examined. The complete integration filter is partitioned into a feedback filter combined with a finite duration impulse response (FIR) part which may be thought of as a cascaded compensator subfilter. New integrator designs are obtained using linear programming to achieve minimax optimization of the linear-phase FIR compensator, constrained t... View full abstract»

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  • Some results in linear interpolation theory

    Publication Year: 1983, Page(s):746 - 749
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    Using a well-known form for the inverse of a symmetric Toeplitz matrix, some results in linear interpolation theory are derived. For an autoregressive process it is shown that interpolation at the mid-point of a data record yields the minimum interpolation error. Also, some results for infinite length interpolators are simply derived. View full abstract»

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  • Minimum cross-entropy spectral analysis of multiple signals

    Publication Year: 1983, Page(s):574 - 582
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    This paper presents a new information-theoretic method for simultaneously estimating a number of power spectra when a prior estimate of each is available and new information is obtained in the form of values of the autocorrelation function of their sum. One application of this method is the separate estimation of the spectra of a signal and additive noise, based on autocorrelations of the signal p... View full abstract»

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  • Nonstationary spectral modeling of voiced speech

    Publication Year: 1983, Page(s):664 - 678
    Cited by:  Papers (47)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1600 KB)

    The main purpose of this paper is to present a novel model for voiced speech. The classical model, which is being used in many applications, assumes local stationarity, and consequently imposes a simple and well known line structure to the short-time spectrum of voiced speech. The model derived in this paper allows for local non-stationarities not only in terms of pitch perturbations, but in terms... View full abstract»

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  • A particular example of phase unwrapping using noisy experimental data

    Publication Year: 1983, Page(s):742 - 744
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Obtaining a smooth continuous function of phase from a distorted, sampled set of phase measurements is addressed. Provided the smooth continuous function can be written as a power series, all the important coefficients can be derived from phase difference measurments which have proved to be less affected by phase noise than the phase measured directly. This simple technique is shown to have advant... View full abstract»

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Aims & Scope

This Transactions ceased production in 1990. The current retitled publication is IEEE Transactions on Signal Processing.

Full Aims & Scope