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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 1 • February 1985

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Displaying Results 1 - 25 of 52
  • [Front cover and table of contents]

    Publication Year: 1985, Page(s): 0
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  • Fast algorithms for lpdeconvolution

    Publication Year: 1985, Page(s):174 - 182
    Cited by:  Papers (65)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (921 KB)

    This paper discusses two algorithms forl_{p}, 1 leq p leq 2, deconvolution. One, iterative reweighted least squares (IRLS), is discussed with an eye toward improving its computational efficiency, while the other, residual steepest descent (RSD), is considered in an attempt to improve its convergence properties. In the first case, fast Fourier transforms are used to reduce the number of ... View full abstract»

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  • A fast algorithm for solving a Toeplitz system of equations

    Publication Year: 1985, Page(s):254 - 267
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1468 KB)

    A fast algorithm for the solution of a Toeplitz system of equations is presented. The algorithm requires orderN(log N)^{2}computations where N is the number of equations. For banded Toeplitz matrices the order of computations is reduced to onlyN log N + m(log m)^{2}where 2m is the maximum number of nonzero principal subdiagonals of the Toeplitz matrix. The algorithm is in ess... View full abstract»

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  • Sampling expansions for multiband signals

    Publication Year: 1985, Page(s):312 - 315
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (434 KB)

    The class BIof finite energy signals bandlimited to a set I is considered where I denotes a finite union of disjoint open intervals (bands) on the real frequency axis. If such a signal is sampled uniformly (constant intersample spacing T), it is shown that the following five propositions are equivalent. 1) Any signal in BIis uniquely determined from its uniform samples taken ... View full abstract»

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  • VLSI Silicon compilation and the art of automatic microchip design [Book Reviews]

    Publication Year: 1985, Page(s):336 - 337
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  • Adaptive filtering prediction and control [Book Reviews]

    Publication Year: 1985, Page(s):337 - 338
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    Freely Available from IEEE
  • LC filter design, test, and manufacturing

    Publication Year: 1985, Page(s): 337
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (161 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1985, Page(s): c4
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    Freely Available from IEEE
  • Optimal solution of a training problem in speech recognition

    Publication Year: 1985, Page(s):326 - 329
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    We take the view that the payoff correpsonding to different ways of training a speech recognizer is the probability that the recognizer will correctly recognize a randomly chosen word. In "A Decision Theoretic Formulation of a Training Problem in Speech Recognition" we posed the problem of choosing a speech recognizer as an optimization problem with the expected value of the above payoff as the ob... View full abstract»

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  • Positive time-frequency distribution functions

    Publication Year: 1985, Page(s):31 - 38
    Cited by:  Papers (100)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    We demonstrate the existence of positive joint distributions of time and frequency for arbitrary signals. A method is given to readily generate an infinite number of them for any signal. General properties of these distribution functions are derived and specific examples for some common signals are presented. View full abstract»

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  • Co-occurrence analysis of speech waveforms

    Publication Year: 1985, Page(s):5 - 30
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1880 KB)

    The co-occurrence matrix, a two-dimensional histogram of pairs of sample amplitudes, is explored as a representation of the digital speech waveform. Co-occurrence matrix representations support a hypothesis-testing approach to digital speech analysis. This approach is pursued in the formulation of a quantitative (chi-square) measure of sample amplitude dependence, based on co-occurrence matrices. ... View full abstract»

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  • Variance and bias of the normalized relay correlation estimator

    Publication Year: 1985, Page(s):334 - 336
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    In a recent paper, Gabriel states that no simple or enlightening expression exists for the variance and bias of the normalized relay correlation estimator for independent pairs of Gaussian samples. In this note, approximate expressions for this variance and bias are derived which are both simple and agree with the empirical variances measured by Gabriel. View full abstract»

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  • Convergence analysis of LMS filters with uncorrelated Gaussian data

    Publication Year: 1985, Page(s):222 - 230
    Cited by:  Papers (244)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    Statistical analysis of the least mean-squares (LMS) adaptive algorithm with uncorrelated Gaussian data is presented. Exact analytical expressions for the steady-state mean-square error (mse) and the performance degradation due to weight vector misadjustment are derived. Necessary and sufficient conditions for the convergence of the algorithm to the optimal (Wiener) solution within a finite varian... View full abstract»

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  • LSI implementation of a pattern matching algorithm for speech recognition

    Publication Year: 1985, Page(s):1 - 4
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Many speech recognition systems contain the foUowing functional blocks: a voice input circuit, a feature extractor (analyzer), a unit for calculating the distance between input and standard patterns at every frame, a memory for storing standard patterns, a unit for matching whole word patterns (a pattern matching circuit), and a final decision and system control circuit. The pattern matching circu... View full abstract»

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  • Signal power upper bound in parameter estimation

    Publication Year: 1985, Page(s):315 - 316
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    In this note, an upper bound on the signal power corresponding to a hypothesized model is derived assuming unknown signal and noise characteristics. A residual matrix is obtained from the observed data correlation matrix by subtracting a weighted outer product of the model vector. The upper bound is the largest signal power such that the residual correlation matrix stays nonegative. It is shown th... View full abstract»

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  • Estimates for the stability of low-pass filters

    Publication Year: 1985, Page(s):98 - 105
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    A measure of stability is defined for digital filters. It is shown that the stability of low-pass filters goes to zero as the filter characteristics approach that of an ideal low-pass filter. More precisely, estimates for the rate of convergence are given. It is shown that, except for constants, the stability of a low-pass filter is no greater than the square root of the reciprocal of the logarith... View full abstract»

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  • Texture synthesis using 2-D noncausal autoregressive models

    Publication Year: 1985, Page(s):194 - 203
    Cited by:  Papers (120)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1024 KB)

    The purpose of this paper is to illustrate the usefulness of two dimensional noncausal autoregressive (NCAR) models for the synthesis of textures. These models characterize the gray level at a pixel as a linear combination of gray levels at nearby locations in all directions and an additive white noise variable. We first show that the class of NCAR models is capable of generating a wide variety of... View full abstract»

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  • The radon transforms and some of its applications

    Publication Year: 1985, Page(s):338 - 339
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    First Page of the Article
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  • Implementation of the Gold-Rabiner pitch detector in a real time environment using an improved voicing detector

    Publication Year: 1985, Page(s):319 - 320
    Cited by:  Papers (2)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    An implementation of Gold-Rabiner parallel processing pitch detector is described. Modifications to the original pitch detector that resulted in a more accurate voiced/unvoiced decision are presented. The modified pitch detector, along with all the tasks required by a real time, full duplex 2400 bit/s vocoder, have been implemented on a single Texas Instruments' TMS-320 microprocessor chip. View full abstract»

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  • New second-order state-space structures for realizing low roundoff noise digital filters

    Publication Year: 1985, Page(s):106 - 110
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Several new second-order state-space digital filter structures are introduced. Each of the new structures requires one or two less multiplies than the minimum-noise structure, while achieving a round-off noise performance which is nearly as good. Thus, they provide an excellent means of realizing second-order subfilters. When such subfilters are used to construct nth-order filters, the reduction i... View full abstract»

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  • Short-time Fourier transform using a bank of low-pass filters

    Publication Year: 1985, Page(s):182 - 185
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The purpose of this paper is to present some experimental results estimating instantaneous frequencies of FM (frequency modulation) signals using the short-time Fourier transform (STFT) method. The relevant STFT coefficients were computed using a bank of simple one-pole low-pass filters which estimates the cross correlation of a given signal and complex sinusoids. Also, it is shown that computing ... View full abstract»

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  • The use of multiple criterion optimization for frequency domain design of noncausal IIR filters

    Publication Year: 1985, Page(s):126 - 135
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    Noncausal recursive filters have recently been proposed because of their increased efficiency versus linear phase FIR filters and causal IIR filters [2]. A general frequency domain design technique capable of exploiting the characteristics of noncausal filters is not yet available. This paper proposes the use of multiple criterion optimization for the frequency domain design of noncausal IIR filte... View full abstract»

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  • Circular harmonic analysis of PSF's corresponding to separable polar-coordinate frequency responses with emphasis on fan filtering

    Publication Year: 1985, Page(s):300 - 307
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A method based on radius-dependent angular Fourier coefficients (circular harmonics) is used to analyze the point spread function (PSF) of any 2-D filter whose frequency response is separable in the polar-coordinate variables. The approach relies on the ability to express the PSF as the angular cyclic convolution of two functions related to the angular and radial characteristics of the frequency r... View full abstract»

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  • Discrete-time distortion analysis of quantized sinusoids

    Publication Year: 1985, Page(s):323 - 326
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Results are presented for the harmonic distortion and intermodulation products associated with file quantization of two sinusoids, with and without noise present. For the case of one sinusoid strong and the other weak, it is demonstrated that the intermodulation distortion is not as large as the self-distortion of the quantized strong sinusoid alone. View full abstract»

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  • ARMA spectral estimation for noisy signals observed through a linear system

    Publication Year: 1985, Page(s):160 - 163
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Spectral estimation for autoregressive moving-average (ARMA) processes observed through a known linear system is considered. An algorithm based on a system identification/parameter estimation technique known as the recursive prediction error method is used for spectral estimation. The algorithm is formulated in the state space to incorporate the constraints imposed by the linear system. The linear... 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