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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 4 • August 1983

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Displaying Results 1 - 25 of 42
  • [Front cover and table of contents]

    Publication Year: 1983, Page(s): 0
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    Freely Available from IEEE
  • Comments on "Hardware for two-dimensional digital filtering using Fermat number transforms

    Publication Year: 1983, Page(s):1034 - 1037
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (371 KB)

    In the above-mentioned paper it was shown how two-dimensional convolutions of arrays of size μn by μn could be calculated by means of number theoretic transforms of length n by n. Some improvements can be made in this algorithm in the sense that the number of general multiplications can be reduced. Systematic techniques to accomplish this reduction are presented in this comment. View full abstract»

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  • Calculation of the impulse response of two-dimensional digital filter

    Publication Year: 1983, Page(s):1050 - 1052
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (333 KB)

    A method for the calculation of the impulse response of quarter-plane and half-plane filters will be presented. The basic result is that the functions Hl(Z) defined byH(z, w) = summin{l=-infin}max{+infin} H_{l}(z)w^{-1}obey a simple difference equation. The necessary initial conditions can be obtained by restrictions on the support of the impulse response. The proposed method... View full abstract»

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  • [Back cover]

    Publication Year: 1983, Page(s): c4
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    Freely Available from IEEE
  • Ξ-filters

    Publication Year: 1983, Page(s):861 - 876
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3976 KB)

    A new family of nonlinear digital convolution filters is described having unusual and valuable properties. The response is constant phase over the entire input frequency range and, in some forms, no signal whatsoever is passed beyond the cutoff frequency and side-lobes are identically zero. By simply iterating the transform upon which a Ξ-filter is based without changing the size of the convo... View full abstract»

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  • Steady-state response of a delay-constrained adaptive linear predictor filter to a sinusoid in white noise

    Publication Year: 1983, Page(s):1039 - 1043
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    An analysis is presented for the steady-state response of a delay-constrained adaptive linear predictor filter to a sinusoid in white noise. Expressions are derived for the steady-state adaptive weights, frequency response, and line suppression. A useful bound is also derived for the worst-case output signal-to-noise ratio as a function of normalized frequency and the order of the filter. View full abstract»

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  • K-cyclic symmetries in multidimensional sampled signals

    Publication Year: 1983, Page(s):847 - 860
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1320 KB)

    In this paper, K-cyclic frequency domain symmetry conditions for N-dimensional sampled signals are introduced. It is shown that these frequency domain symmetry conditions result in certain interrelationships between the sample values. A theorem is given that specifies these interrelationships. Several interesting properties of K-cyclic symmetries are discussed. Also, a systematic approach is given... View full abstract»

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  • A decision theorectic formulation of a training problem in speech recognition and a comparison of training by unconditional versus conditional maximum likelihood

    Publication Year: 1983, Page(s):814 - 817
    Cited by:  Papers (71)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The choice of method for training a speech recognizer is posed as an optimization problem. The currently used method of maximum likelihood, while heuristic, is shown to be superior under certain assumptions to another heuristic: the method of conditional maximum likelihood. View full abstract»

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  • Noise spectra of digital sine-generators using the table-lookup method

    Publication Year: 1983, Page(s):1037 - 1039
    Cited by:  Papers (19)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The table-lookup method is a convenient and very flexible way to generate high-quality sinusoidal test signals for measurements in psychoacoustics, speech perception, etc. Exact spectra of such signals, which are of great interest in experiments, are derived, and the relation between spectral shape, table length, and sine frequency is shown. View full abstract»

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  • Passive source localization from spatially correlated angle-of-arrival data

    Publication Year: 1983, Page(s):842 - 846
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Bias and variance equations are presented for two-dimensional location estimators of a nonmoving point source of radiation in an isotropic, stationary random medium. The estimators are calculated from spatially correlated angle-of-arrival data which are collected simultaneously at two sensor positions, and assumed to consist of true (unbiased) source angles plus zero-mean angular noise with equal ... View full abstract»

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  • Relative linear power contribution with estimation statistics

    Publication Year: 1983, Page(s):1025 - 1028
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The relative contribution by a noiselessly observed input signal to the power of a possibly disturbed observed stationary output signal from a linear system is expressed into signal spectral densities. Approximations of estimator statistics and derived confidence limits agree fairly well with simulation results for white signals. View full abstract»

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  • Optimum array filters for array data signal processing

    Publication Year: 1983, Page(s):1006 - 1015
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    This paper deals with the design of filters for processing data obtained from arrays of sensors used for signal measurements in a variety of applications. The objective of the filters is to optimally suppress undesired signals intercepting the array, while at the same time to preserve the desired signal that the array is attempting to measure. A constrained minimization problem is formulated for d... View full abstract»

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  • On the effects of varying filter bank parameters on isolated word recognition

    Publication Year: 1983, Page(s):793 - 807
    Cited by:  Papers (66)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1600 KB)

    The vast majority of commercially available isolated word recognizers use a filter bank analysis as the front end processing for recognition. It is not well understood how the parameters of different filter banks (e.g., number of filters, types of filters, filter spacing, etc.) affect recognizer performance. In this paper we present results of performance evaluation of several types of filter bank... View full abstract»

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  • A new design method of optimal finite wordlength linear phase FIR digital filters

    Publication Year: 1983, Page(s):1032 - 1034
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The branch and bound technique is applied to the design of optimal finite wordlength linear phase FIR digital filters in a new efficient way. Compared to other reported methods there is a great saving of storage area used by the designing program; reductions in computation time are also to be expected. View full abstract»

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  • On two-dimensional Markov spectral estimation

    Publication Year: 1983, Page(s):836 - 841
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    We give systematic methods for two-dimensional (2-D) spectral estimation from raw data using Gaussian Markov random field (MRF) models. The MRF models considered in this paper characterize the statistical dependence of the observation y(s) on its neighbors in all directions. Due to the modeling assumption, the 2-D spectrum is an explicit function of the parameters of the MRF model. Thus, the spect... View full abstract»

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  • Adaptive beam forming using a cascade configuration

    Publication Year: 1983, Page(s):940 - 945
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    A new technique for adaptive beam forming based on the Davies cascade array configuration [11] is presented. First of all it is shown that an n-element linear array can be reconfigured as a number of subarrays of two elements each. This two-element array is capable of steering one null in an arbitrary direction while maintaining a desired gain in some other prespecified look direction. To adaptive... View full abstract»

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  • Comparison of three correlation coefficient estimators for gaussian stationary processes

    Publication Year: 1983, Page(s):1023 - 1025
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Using independent samples from two stationary Gaussian processes, second-order statistics are examined for the following three correlation estimators: 1) the direct estimator, 2) a "hybrid-sign" estimator, and 3) the polarity coincidence estimator. In most cases, increasing the number of samples by a factor of two or three allows one to use the simple polarity coincidence estimator with the same a... View full abstract»

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  • Number theoretic transforms for the calculation of convolutions

    Publication Year: 1983, Page(s):969 - 978
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    In this paper, we present new algorithms for the calculation of convolutions by means of number theoretic transforms over modulo rings. Not only are these algorithms more efficient than currently used methods, but they are also very flexible. Indeed, using special algorithms for short convolutions allows trading computational efficiency for structural simplicity. View full abstract»

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  • An algorithm for the numerical evaluation of the Hankel and Abel transforms

    Publication Year: 1983, Page(s):979 - 985
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    A procedure for the efficient numerical evaluation of the Hankel and Abel transforms is proposed. The Abel transform is reduced to a convolution which is evaluated in part analytically and in part with an FFT. The Hankel transform is obtained by following the Abel transform with an FFT. View full abstract»

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  • Design of IIR/FIR filters using a frequency domain bootstrapping technique and LPC methods

    Publication Year: 1983, Page(s):999 - 1006
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    A technique is described for designing IIR/FIR digital filters which are specified by the number of poles and zeros, the sampling frequency, and a magnitude response versus frequency. The iterative technique to carry out the design bootstraps back and forth between the IIR (all pole) section and FIR (all zero) section, updating the design each time in the frequency domain using the data from the p... View full abstract»

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  • An improved FPT algorithm for computing two-dimensional cyclic convolutions

    Publication Year: 1983, Page(s):1048 - 1050
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    In this correspondence the fast polynomial transform (FPT) algorithm for two-dimensional cyclic convolutions in [6], [7] is improved. These improvements result from reduction of the complexity of polynomial products, modulo (zK+ 1), and the decomposition and reconstruction by the Chinese remainder theorem. With these improvements the FPT can be performed with a more regular and modular ... View full abstract»

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  • Linear predictive coding of marine seismic data

    Publication Year: 1983, Page(s):828 - 835
    Cited by:  Papers (5)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    This paper examines the utility of linear predictive coding in reducing the amount of data storage required for signals gathered in ocean bottom seismology. In this study, a set of 12 typical signals were repeatedly encoded with the storage allocated decreasing from an initial 12 bits per datum to 2. The error introduced was then compared to the performance achieved by simply rounding off the lowe... View full abstract»

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  • Asymptotically optimal detection in unknown colored noise via autoregressive modeling

    Publication Year: 1983, Page(s):927 - 940
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    The problem of detecting a known signal in colored Gaussian noise of unknown covariance is addressed. The noise is modeled as an autoregressive process of known order but unknown coefficients. By employing the theory of generalized likelihood ratio testing, a detector structure is derived and then analyzed for performance. It is proven that for large data records the detection performance is ident... View full abstract»

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  • On efficient implementations of 2-D digital filters using logarithmic number systems

    Publication Year: 1983, Page(s):877 - 885
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    The implementation of 2-D digital filters using logarithmic number systems (LNS's) is discussed in detail. The properties of such systems are derived with reference to an iterative rounding scheme, which allows increasing the accuracy of the filter coefficient representation by using more than one power of the base a. The optimization of the base is proposed as an efficient tool for the design of ... View full abstract»

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  • Effect of gradient noise on the adaptive cancellation of a sinusoid in white noise

    Publication Year: 1983, Page(s):1043 - 1045
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    It is demonstrated that for applications in which adaptive cancellation of sinusoids, rather than enhancement, is desired, the effect of gradient noise is negligible when operating within the stability range of the filter. 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