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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 3 • June 1984

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Displaying Results 1 - 25 of 38
  • [Front cover and table of contents]

    Publication Year: 1984, Page(s): 0
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  • A discussion of various approaches to the linear system identification problem

    Publication Year: 1984, Page(s):654 - 656
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    This paper deals with the pole zero identification of a linear system from a measured input-output record. One objective is to show that the pencil-of-function method minimizes a weighted version of the Kalman equation error. It follows that the pencil-of-function method is capable of yielding robust estimates for poles located in a given region of the complex s plane. The second objective of this... View full abstract»

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  • Correction to "An algorithm for LPC synthesis gain matching"

    Publication Year: 1984, Page(s): 670
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (66 KB)

    First Page of the Article
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  • Editorial

    Publication Year: 1984, Page(s):678 - 679
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1984, Page(s): c4
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    Freely Available from IEEE
  • A generalized block truncation coding algorithm for image compression

    Publication Year: 1984, Page(s):664 - 668
    Cited by:  Papers (38)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Block Truncation Coding is a recently developed approach to image compression whose design is specified by the appropriate moment preserving quantizer. In this paper we show how the basic Block Truncation Coding algorithm can be generalized to include a family of moment preserving quantizers with the potential for improved performance. We then illustrate by way of example that such improvement is ... View full abstract»

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  • Error of linear estimation of lost samples in an oversampled band-limited signal

    Publication Year: 1984, Page(s):648 - 654
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    A finite number of lost samples from an oversampled band-limited signal can be restored from the remaining samples. This paper explores the noise sensitivity of a linear algorithm that performs such restoration. Even though the problem is well posed, restoration noise level can become prohibitively high for a) sampling rates close to the Nyquist rate, and b) too many lost samples. Numerical result... View full abstract»

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  • A comparison of efficient beamforming algorithms

    Publication Year: 1984, Page(s):548 - 558
    Cited by:  Papers (91)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    Time domain and frequency domain concepts which aid in the design and efficient implementation of a digital beamformer have been described at various times in the literature. The numerous beam-former structures that result are discussed with an emphasis on hardware requirements and spectral areas of application. Time domain procedures which include delay-sum, partial-sum, interpolation and shifted... View full abstract»

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  • An adaptative, nonlinear edge-preserving filter

    Publication Year: 1984, Page(s):571 - 576
    Cited by:  Papers (64)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    An adaptative filter whose main feature is to preserve edges and impulses present in the signal is analyzed by the computation of the mean-square error (MSE) of its output sequence. The filter in its more general form is highly nonlinear, resembling the M-type estimators used in robust statistics. A simplified form used here allows the exact computation of the MSE when the filter length is finite.... View full abstract»

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  • Karhunen-Loeve multispectral image restoration, part I: Theory

    Publication Year: 1984, Page(s):592 - 600
    Cited by:  Papers (114)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    The theory of optimal image restoration is well established for monochrome imagery. However, a variety of sensors acquire multi-spectral or polychrome imagery. The restoration of multispectral imagery by optimal (Wiener) methods is developed in this paper. It is shown that optimal restoration must take place in the Karhunen-Loeve domain. It is further shown that high quality approximate multispect... View full abstract»

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  • Significance of group delay functions in signal reconstruction from spectral magnitude or phase

    Publication Year: 1984, Page(s):610 - 623
    Cited by:  Papers (52)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1472 KB)

    In this paper we discuss the problem of signal reconstruction from spectral magnitude or phase using group delay functions. We define two separate group delay functions for a signal, one is derived from the magnitude and the other from the phase of the Fourier transform of the signal. The group delay functions offer insight into the problem of signal reconstruction and suggest methods for reconstr... View full abstract»

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  • Frequency domain alignment of discrete-time signals

    Publication Year: 1984, Page(s):656 - 659
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Alignment of discrete-time signals using time shifts obtained through cross correlation techniques in the time domain without interpolation can only be done to within an integer multiple of the sampling period. In this paper, we discuss an alignment procedure for discrete-time signals which overcomes this difficulty by determining the time shifts through a parameter optimization problem in the dis... View full abstract»

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  • Number theoretic techniques for computation of digital convolution

    Publication Year: 1984, Page(s):507 - 511
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Each of the methods for computing digital convolution has its own advantages and disadvantages. Techniques are evolved by combining advantages of various methods, leading to reduction in computational effort, and relaxation of limitations in some cases. Although discussion is primarily based on convolution of real data, similar techniques could be employed for convolution of complex sequences. View full abstract»

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  • On the approximation of the optimum detector by the energy detector in detection of colored Gaussian signals in noise

    Publication Year: 1984, Page(s):661 - 664
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    We demonstrate that the optimum detector of colored Gaussian signals in white Gaussian noise can be approximated, without serious degradation in detection performance, by the so-called energy detector which is optimum only when the signal is also white. Contrary to intuition, such an approximation is possible when the signal which is colored dominates the noise which is white. The demonstration is... View full abstract»

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  • 2-D Bauer factorization

    Publication Year: 1984, Page(s):641 - 643
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The extension to the 2-D case of the Bauer formulation of the spectral factorization is given. The relation to the 2-D generalization of the Levinson algorithm by Marzetta leads to a proof of the convergence of the method. The problems of the practical implementation are discussed. View full abstract»

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  • A speaker-independent discrete utterance recognition system, combining deterministic and probabilistic strategies

    Publication Year: 1984, Page(s):489 - 499
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    A speaker-independent isolated word speech recognition system is discussed in which an unknown utterance is described by a set of speech feature measurements and then compared with a reference set of the same measurements obtained during a training procedure with a population of speakers. To reduce significantly the number of word confusions, a segmentation procedure is used. As a result, the whol... View full abstract»

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  • Accurate frequency estimation at low signal-to-noise ratio

    Publication Year: 1984, Page(s):540 - 547
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    A frequency estimator for sinusoids in white noise is described. Convergence results are obtained for the single sinusoid case and a simulation described for the multiple sinusoid case. The estimator is shown to be capable of providing accurate frequency estimates at lower SNR's than currently existing techniques. Furthermore, the simplicity of the algorithm lends itself to a simple and efficient ... View full abstract»

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  • New amplitude change functions for improving the filter response

    Publication Year: 1984, Page(s):643 - 645
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A method is suggested for improving the response of a symmetric nonrecursive digital filter using several copies of that filter. This is based on shifting and/or scaling the amplitude change function (ACF). A new generalized ACF has been derived which has similar characteristics as that of the Kaiser-Hamming--Chebyshev ACF, but does not require additional correction filters for its implementation.... View full abstract»

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  • Polynomial products by means of generalized number theoretic transforms

    Publication Year: 1984, Page(s):668 - 670
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    In this paper, we extend the definition of number theoretic transforms (NTT's) to generalized NTT's (GNTT's), and show that these GNTT's can be used to efficiently calculate polynomial products such as circular and skew-circular convolutions. View full abstract»

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  • NAR AGC adaptive detection of signals deformed by random linear filtering using generalized matched and antimatched filters

    Publication Year: 1984, Page(s):499 - 506
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    The adaptive detection of signals deformed by random linear filtering in noise with fluctuating power is considered. An automatic gain control (AGC) receiver comprising both generalized matched and antimatched filters is proposed. The antimatched filter is inserted in the AGC channel in order to minimize the average power signal-to-noise ratio, and thus renders the AGC approximately insensitive (t... View full abstract»

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  • Estimation of sinusoids from incomplete time series

    Publication Year: 1984, Page(s):559 - 562
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The Gerchberg-Papoulis extrapolation algorithm was applied to the problem of recovering missing observations from incomplete time series. It has been experimentally shown that with as few as 10 percent of data points and a priori information on the bandwidth, it is possible to recover all the missing points in the time series. The technique is illustrated by means of a pair of sinusoids sampled ra... View full abstract»

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  • Digital methods for conversion between arbitrary sampling frequencies

    Publication Year: 1984, Page(s):577 - 591
    Cited by:  Papers (59)  |  Patents (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1520 KB)

    The paper presents filtering methods for interfacing time-discrete systems with different sampling frequencies. The methods are applicable for sampling rate conversion between any two sampling frequencies; the conversion ratio may even be irrational or slowly time varying. Interpolation by irrational factors requires digital filters with nonperiodically varying coefficients. This is dealt with in ... View full abstract»

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  • Application of two-dimensional generalized mean filtering for removal of impulse noises from images

    Publication Year: 1984, Page(s):600 - 609
    Cited by:  Papers (65)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2296 KB)

    A new method for removing impulse noises from images is proposed. The filtering scheme is based on replacing the central pixel value by the generalized mean value of all pixels inside a sliding window. The concepts of thresholding and complementation which are shown to improve the performance of the generalized mean filter are introduced. The threshold is derived using a statistical theory. The ac... View full abstract»

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  • High quality synthesis of musical voices in discrete time

    Publication Year: 1984, Page(s):623 - 633
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB)

    A new technique for high quality syntheses of musical voices (instruments) is presented, it is a harmonic synthesis method based on weighted window function "pulse" sequences. The technique eliminates the problem of aliasing in its discrete-time implementation. High fidelity emulations of "natural" instruments are achieved at a greatly reduced cost in multiplies per sample time. In addition, param... View full abstract»

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  • An analytical formula for the design of quadrature mirror filters

    Publication Year: 1984, Page(s):645 - 648
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Quadrature mirror filters have an outstanding relevance in the implementation of filter banks for dividing the speech signal into frequency bands and for reconstructing it from these subbands. An analytical formula is given, which allows one to optimize the design of the basic low-pass FIR filter by means of a straight nonlinear minimization procedure. 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