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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 1 • Date 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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    Freely Available from IEEE
  • VLSI Silicon compilation and the art of automatic microchip design [Book Reviews]

    Publication Year: 1985, Page(s):336 - 337
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    Freely Available from IEEE
  • 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
  • Texture synthesis using 2-D noncausal autoregressive models

    Publication Year: 1985, Page(s):194 - 203
    Cited by:  Papers (81)  |  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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  • Fast algorithms for lpdeconvolution

    Publication Year: 1985, Page(s):174 - 182
    Cited by:  Papers (51)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    This paper discusses two algorithms for l_{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 ... 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 (1)  |  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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  • A method for cancelling interference from a constant envelope signal

    Publication Year: 1985, Page(s):316 - 319
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A method for adaptively cancelling interference from a constant envelope target signal is presented. The method is useful, even when some of the interfering signals are also constant envelope. The adaptive algorithm distinguishes between target signal and interference on the basis of signal amplitude and envelope shape. The amplitude of the target signal must be approximately known or measurable. View full abstract»

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  • Co-occurrence analysis of speech waveforms

    Publication Year: 1985, Page(s):5 - 30
    Cited by:  Papers (4)
    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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  • Positive time-frequency distribution functions

    Publication Year: 1985, Page(s):31 - 38
    Cited by:  Papers (77)
    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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  • 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 (2)
    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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  • Optimum detection performance of passive coherence estimators

    Publication Year: 1985, Page(s):240 - 248
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    Two-dimensional coherence processing is commonly used for passive detection in acoustic sensor systems. Modern coherence processors well suited for this purpose include the magnitude-squared coherence (MSC) estimator and the normalized correlation envelope (NCE) estimator. These are biased estimators whose performance characteristics are not well understood and are exceptionally difficult to analy... View full abstract»

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  • Analysis of the short-time unbiased spectrum estimation algorithm.

    Publication Year: 1985, Page(s):136 - 142
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    The short-time unbiased spectrum estimation (STUSE) algorithm is analyzed and expressions for the mean and variance of the spectrum estimates are derived. The STUSE algorithm deliberately adds biased spectrum estimates in order to yield unbiased estimates and at the same time have excellent spectral leakage suppression capabilities. Computer simulations are presented, verifying the theoretical res... View full abstract»

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  • The least squares estimation of time delay between two signals with unknown relative phase shift

    Publication Year: 1985, Page(s):308 - 309
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    This correspondence addresses the problem of time delay estimation between two signals with an unknown constant relative phase shift. The method of time delay estimation for the pure delay case of Chan et al. [1] is applied here to derive the least squares estimator (LSE). An explicit expression for the LSE of the delay is obtained which is computationally less complex than the maximum likelihood ... View full abstract»

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  • A fast maximum likelihood algorithm for frequency estimation of a sinusoid based on Newton's method

    Publication Year: 1985, Page(s):77 - 89
    Cited by:  Papers (49)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    A fast algorithm to estimate the frequency of a sinusoid is presented here. It is based on Newton's method for finding the root of an equation, and it is shown that under easily met conditions, the root mean-square error (RMSE) of the estimator is practically equal to the Cramer-Rao bound after only two iterations of Newton's method for all signal-to-noise ratios (SNR's) above threshold. The estim... View full abstract»

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  • Fitting autoregressive models to EEG time series: An empirical comparison of estimates of the order

    Publication Year: 1985, Page(s):143 - 150
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    A parametrization of the spectral structure of time series data is of great interest in many fields of science such as eleetroencephalography (EEG). Autoregressive processes offer such a representation. The problem is to find a parsimonious representation which fits the data well. Three criteria for determining the order of autoregressive models are, therefore, compared. A simulation is done for s... 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 (173)  |  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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  • On the structure of efficient DFT algorithms

    Publication Year: 1985, Page(s):248 - 254
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    This paper examines the structure of the prime length discrete Fourier transform algorithms that are developed by Winograd's approach. It is shown that those algorithms have considerable structure, and this can be exploited to develop a straightforward design procedure which does not use the Chinese remainder theorem and which includes any allowed permutations. This structure also allows the desig... View full abstract»

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  • On relating discrete Fourier, sine, and symmetric cosine transforms

    Publication Year: 1985, Page(s):219 - 222
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    The relationship among a real formalism of the discrete Fourier transform, discrete sine transform, and discrete symmetric cosine transform is discussed. It is shown that the real formalism of the discrete Fourier transform is basically equivalent to the direct sum of the other two transforms, with modifications in the pre- and post-computations with the data vector. View full abstract»

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  • Optimal solution of a training problem in speech recognition

    Publication Year: 1985, Page(s):326 - 329
    Cited by:  Papers (16)
    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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  • Time-delay estimation performance in a scattering medium

    Publication Year: 1985, Page(s):50 - 60
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    The effects of a scattering medium on the performance of time-delay estimation are considered. The medium is assumed to exhibit angular scattering, causing angular (as well as delay) dispersion and hence loss of signal coherence across the array aperture. Both the variance (via the Cramer-Rao bound) and the bias introduced in the time-delay estimates are studied. The results have been converted to... 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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  • Constrained signal restoration via iterated extended Kalman filtering

    Publication Year: 1985, Page(s):331 - 334
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The problem of estimating the input (signal restoration) to a known linear system (point spread function), given the noisy observations of the output, is considered. The input signal is assumed to satisfy certain known physical constraints such as positivity. It is proposed to incorporate the constraints by introducing a memoryless non-linearity in the system. A statistical approach is taken leadi... View full abstract»

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  • Discrete-time distortion analysis of quantized sinusoids

    Publication Year: 1985, Page(s):323 - 326
    Cited by:  Papers (6)
    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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Aims & Scope

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

Full Aims & Scope