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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 4 • Date August 1984

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

    Publication Year: 1984, Page(s): 0
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    Freely Available from IEEE
  • Editorial

    Publication Year: 1984, Page(s):681 - 682
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    Freely Available from IEEE
  • A comment on "A memory compression scheme for modular arithmetic"

    Publication Year: 1984, Page(s): 932
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (94 KB)

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  • [Back cover]

    Publication Year: 1984, Page(s): c4
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    Freely Available from IEEE
  • Multirate digital signal processing

    Publication Year: 1984, Page(s): 941
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

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  • On the use of discrete cosine transform in cepstral analysis

    Publication Year: 1984, Page(s):922 - 925
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    If the original signal is defined to be symmetrical, the discrete Fourier transform (DFT) used in cepstral analysis can be replaced by a discrete cosine transform (DCT). This principle is applied to the evaluation of the real and complex pseudocepstrum of speech signals. In both the real and complex cepstrum cases, it is found that the use of the DCT does not degrade the information contained in t... View full abstract»

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  • On the eigenstructure of Toeplitz matrices

    Publication Year: 1984, Page(s):918 - 921
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    In spite of the fact that Toeplitz eigenvalue problems have important applications in signal processing, relatively little is known about the eigenstructure of finite real symmetric Toeplitz matrices. In this paper, we exhibit two facts about the Toeplitz eigenstructure problem. First we show that any reciprocal or anti-reciprocal n vector is an eigenvector for at least an [(n + 1)/2]-dimensional ... View full abstract»

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  • On the stability of two-dimensional state-space systems: A special case

    Publication Year: 1984, Page(s):921 - 922
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The stability of two-dimensional state-space systems can be determined by knowing the zero manifolds of the characteristic equation \det(I- z_{1}A_{1} - z_{2}A_{2}) = 0 or, equivalently, the eigenvalues of the matrix (A_{1} + e^{J\omega }A_{2}) for all real ω. We propose a new simple test for the special case when... View full abstract»

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  • Sufficient conditions for minimum phase two-dimensional PLSI's

    Publication Year: 1984, Page(s):916 - 918
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    In this paper we derive a set of sufficient conditions to obtain minimum phase two-dimensional planar least-squares inverses (PLSI's). The result enlarges the class of two-dimensional polynomials for which the Shanks conjecture holds. We give examples to illustrate the application of the sufficient conditions in the stabilization of two-dimensional recursive digital filters. View full abstract»

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  • Linear and nonlinear estimators for one- and two-dimensional Fourier transforms

    Publication Year: 1984, Page(s):914 - 916
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Previously presented estimators for one-dimensional Fourier transforms are modified to provide two-dimensional analogs which are computationally feasible for large systems of equations. Near-optimal, two-dimensional estimators are obtained by an iterative approximation method which involves the inversion of block lower triangular matrices. View full abstract»

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  • On the synthesis of IIR digital filters derived from single channel AR lattice network

    Publication Year: 1984, Page(s):741 - 749
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    The synthesis of two families of ARMA lattice filters-injected numerator filters and the tapped numerator filters-are presented. For both families of filters, the denominator of the z-transform transfer function is synthesized using the single channel AR lattice. The transfer function's numerator of the injected numerator filter is realized by weighting and injecting the input signal into N + 1 ap... View full abstract»

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  • The use of linear constraints to reduce the variance of time of arrival difference estimates for source location

    Publication Year: 1984, Page(s):907 - 912
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    Research on the estimation of time of arrival (TOA) differences has emphasized the reduction of variance for measurements corresponding to individual pairs of signals, each estimate being regarded as an independent variable. In reality, the geometry of a source location system results in linear constraints which must be satisfied by the TOA differences. These constraints, known from a priori infor... View full abstract»

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  • On the computation of the Cramer-Rao bound for ARMA parameter estimation

    Publication Year: 1984, Page(s):721 - 727
    Cited by:  Papers (60)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    The Cramer-Rao lower bound (CRLB) provides a useful tool for evaluating the performance of parameter estimation techniques. Several techniques for the computation of the asymptotic form of the CRLB for ARMA models are presented. It is shown that the asymptotic CRLB can be expressed as an explicit function of the model parameters. View full abstract»

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  • The integrated signal processing system ISP

    Publication Year: 1984, Page(s):842 - 851
    Cited by:  Papers (18)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1280 KB)

    The Integrated Signal Processing System (ISP) is a Lisp machine-based workstation which provides a unified environment for signal data processing and the development of signal processing algorithms. ISP is based on a model of signal processing computation in which the fundamental activities are creating and manipulating abstract signal objects. ISP consists of three main subsystems. The signal rep... View full abstract»

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  • Estimation of probabilities in the language model of the IBM speech recognition system

    Publication Year: 1984, Page(s):859 - 861
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    The language model probabilities are estimated by an empirical Bayes approach in which a prior distribution for the unknown probabilities is itself estimated through a novel choice of data. The predictive power of the model thus fitted is compared by means of its experimental perplexity [1] to the model as fitted by the Jelinek-Mercer deleted estimator and as fitted by the Turing-Good formulas for... View full abstract»

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  • On the absence of limit cycles in a class of state-space digital filters which contains minimum noise realizations

    Publication Year: 1984, Page(s):928 - 930
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    This paper presents a theorem for the absence of limit cycles in a class of state-space digital filters. Such a class contains minimum noise realizations of any order as a special case, that is, it is proved that the transition matrix A of minimum noise realizations of any order satisfies I - A^{t}A \geq 0 , and thus the realizations are free of limit cycles... View full abstract»

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  • Fast block data processing via a new IIR digital filter structure

    Publication Year: 1984, Page(s):770 - 779
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    A new structure for realizing IIR digital filters is introduced based on the idea of processing sequences by blocks. It is shown that this structure exhibits high inherent parallelism that is ideally suited for VLSI implementation or multimicroprocessor systems. This enables high-speed processing with the number of multiplies and additions per output sample much less than those of the block-state ... View full abstract»

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  • Maximum entropy spectral estimation for regular time series of degenerate rank

    Publication Year: 1984, Page(s):733 - 740
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    This paper deals with multichannel time series of degenerate rank, and extends the maximum entropy method over the degenerate rank case. In order to define the entropy of a multichannel time series of degenerate rank, we must first clarify all the deterministic relationships in the time series. This will be done for any regular time series matching given finite data View full abstract»

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  • A limitation of the Kumaresan-Prony algorithm in direction-finding applications

    Publication Year: 1984, Page(s):912 - 914
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A modification of the forward-backward linear prediction method of spectral analysis due to Tufts and Kumaresan was evaluated for use in direction finding with an array of sensors. A special case of this method, called the Kumaresan-Prony case, is especially attractive due to its ease of computation. This case, however, was found to exhibit blind angles, where performance was severely degraded in ... View full abstract»

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  • Optimal all-pole filter design based on discrete prolate spheroidal sequences

    Publication Year: 1984, Page(s):716 - 721
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    A new constrained optimization method for all-pole digital filter design is presented. The design philosophy employed minimizes a function of the area between the ideal low-pass filter response in the passband and the actual filter response subject to a quadratic constraint which ensures filter realizability. It is shown that unique solutions are obtained which are related to eigenvectors of a Toe... View full abstract»

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  • Fast algorithms for the discrete W transform and for the discrete Fourier transform

    Publication Year: 1984, Page(s):803 - 816
    Cited by:  Papers (330)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    A systematic method of sparse matrix factorization is developed for all four versions of the discrete W transform, the discrete cosine transform, and the discrete sine transform, as well as for the discrete Fourier transform. The factorization leads to fast algorithms in which only real arithmetic is involved. A scheme for reducing multiplications and a convenient index system are introduced. This... View full abstract»

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  • Quantizers for the gamma distribution and other symmetrical distributions

    Publication Year: 1984, Page(s):836 - 841
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    This paper discusses minimum mean-square error quantization for symmetric distributions. If the distribution satisfies a log-concavity condition, the optimal quantizer is itself symmetric. For the gamma distribution often used to model speech signals, the log-concavity condition is not satisfied. It is shown that for this distribution both the uniformly spaced and the nonuniformly spaced optimal q... View full abstract»

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  • Adaptive realizations of the maximum likelihood processor for time delay estimation

    Publication Year: 1984, Page(s):938 - 940
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    This correspondence introduces an adaptive realization of the maximum likelihood (ML) processor for time delay estimation (TDE). Also presented is a modified ML processor, which requires less computations but still performs better than the other when implemented in an adaptive way. Widrow's least mean square (LMS) adaptive filter algorithm is used to implement the two methods. Simulation results c... View full abstract»

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  • LMS adaptation with correlated data--A scalar example

    Publication Year: 1984, Page(s):695 - 700
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    In this note, the statistical behavior of the complex scalar LMS adaptation algorithm is investigated when the input data stream consists of statistically dependent inputs. The asymptotic time constant of the mean behavior of the algorithm is evaluated, taking into account the time correlation properties of the input data sequence. It is shown that the behavior of the correlated data case does not... View full abstract»

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  • An enhanced LPC vocoder with no voiced/Unvoiced switch

    Publication Year: 1984, Page(s):851 - 858
    Cited by:  Papers (12)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    A modified LPC system (LPC plus) which requires no voiced/unvoiced switch at the synthesizer is presented in this paper. The excitation functions of the synthesizer filter are modeled to be the sum of the conventional pulse and noise sources. The mixture ratio is estimated from the LPC residual error signal, and this parameter controls the amplitudes of the pulse and noise sources. Since the V/UV ... 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