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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 5 • October 1982

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Displaying Results 1 - 23 of 23
  • [Front cover and table of contents]

    Publication Year: 1982, Page(s): 0
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    Freely Available from IEEE
  • Unconstrained frequency-domain adaptive filter

    Publication Year: 1982, Page(s):726 - 734
    Cited by:  Papers (136)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (937 KB)

    An unconstrained frequency-domain least mean-squares (UFLMS) algorithm is presented. The algorithm is based on the "overlap-save" technique used in frequency-domain filtering. The proposed algorithm converges to the Wiener solution without the time-domain constraint on the impulse response as proposed by Ferrara. For a large number of taps (geq32), the UFLMS algorithm offers a significa... View full abstract»

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  • Median filters: Some modifications and their properties

    Publication Year: 1982, Page(s):739 - 746
    Cited by:  Papers (313)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1387 KB)

    Some modifications of the median filter are given and their properties are derived. In addition, some results for standard median filters are given. It is shown that for nonmedian nth ranked-order operations, repeated application of the operation will reduce any signal to a constant. Also, it is proved that the output of a recursive median filter is invariant to subsequent passes by the same filte... View full abstract»

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  • A note on the evaluation of complex integrals using filtering interpretations

    Publication Year: 1982, Page(s):804 - 807
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (421 KB)

    The evaluation of complex integrals of the formr_{k} = frac{1}{2pij}oint H(z) H(z^{-1}) z^{k}frac{dz}{z}for allkis frequently required in control, communications, and digital filtering problems. The major drawback of all existing methods is that the evaluation of the integral has to be preceded or followed by a check of the stability of the transfer functionH(z)to ... View full abstract»

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  • Correction to "A note on complexity reduction for linear predictive speech synthesis"

    Publication Year: 1982, Page(s): 816
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (44 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1982, Page(s): c4
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    Freely Available from IEEE
  • Correlation function for the weight sequence of the frequency domain adaptive filter

    Publication Year: 1982, Page(s):801 - 804
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The statistical behavior of the single complex adaptive weight in the frequency domain adaptive filter is further investigated. In a previous note [8], an expression was evaluated for the expected value of the magnitude square of the weight sequence at any time. In this note, the covariance of the weight at different times is evaluated and, in steady state, shown to be geometric with the same time... View full abstract»

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  • On using the LMS algorithm for time delay estimation

    Publication Year: 1982, Page(s):798 - 801
    Cited by:  Papers (62)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    This paper concerns the use of Widrow's least-mean-square (LMS) algorithm for implementing a time delay estimation algorithm for fixed and moving passive sonar sources. Digital simulation results are included for evaluating the related performance of the LMS algorithm. View full abstract»

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  • Spectral estimation via the high-order Yule-Walker equations

    Publication Year: 1982, Page(s):689 - 698
    Cited by:  Papers (79)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    A new spectral estimator is developed from the high-order Yule-Walker equations and pseudoinverse solutions to the equations. The approach circumvents the usual difficulties associated with inverting ill-conditioned matrices and allows the choice of high model order. It also provides high resolution spectral estimates as substantiated by simulation results. A byproduct of this spectral estimator i... View full abstract»

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  • An 800 bit/s vector quantization LPC vocoder

    Publication Year: 1982, Page(s):770 - 780
    Cited by:  Papers (41)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1144 KB)

    An 800 bit/s vector quantization linear predictive coding (LPC) vocoder has been developed. The recently developed LPC vector quantization theory is applied to reduce the bit rate for LPC coefficients coding by a factor of four. Branch search techniques and separation of voiced and unvoiced codebooks are applied for better algorithm efficiency. Differential coding is applied to reduce the bit rate... View full abstract»

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  • A direct relation between a signal time series and its unwrapped phase

    Publication Year: 1982, Page(s):719 - 726
    Cited by:  Papers (37)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    A noniterative method for phase unwrapping a real, finite-length, discrete-time signal is described. We use an operator which counts sign changes in a Sturm sequence generated from the real and imaginary parts of the DFT. The number of sign changes is related to the number of multiples of π which must be added to the principal value arctan to produce unwrapped phase. Except for the evaluation... View full abstract»

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  • Application of Deczky's program for recursive filter design to the design of recursive decimators

    Publication Year: 1982, Page(s):811 - 814
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The IEEE Press book Programs for Digital Signal Processing includes a program due to Deczky for the least-p design of recursive filters with simultaneous magnitude and group delay constraints. This correspondence outlines a method for generalizing the algorithm to enable it to design linear phase recursive decimators. An example is given. View full abstract»

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  • Vector radix FFT error analysis

    Publication Year: 1982, Page(s):808 - 811
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    In this correspondence expressions are derived for the multiplication roundoff and scaling error variances in a multidimensional vector radix FFT algorithm, for fixed-point one's complement/ sign-magnitude arithmetic. Results are given for base-2 and base-4 algorithms for both decimation-in-time and decimation-in-frequency methods. Comparisons of the erior performance are made with the conventiona... View full abstract»

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  • On spectrum approximation by impulses

    Publication Year: 1982, Page(s):807 - 808
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    The problem of using the moment method to approximate a power density spectrum by impulses on the jω axis is discussed, it is shown that Prony's algorithm is suitable for determination of the impulse parameters and that their frequencies are equal to the frequencies of the zeros in a certain analog minimum output power filter. An analogy with Pisarenko spectrum analysis is proposed. View full abstract»

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  • Properties of two-dimensional maximum entropy power spectrum estimates

    Publication Year: 1982, Page(s):788 - 798
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB)

    In this paper we present the results of a number of experiments that have been performed to study the properties of two-dimensional maximum entropy spectral estimates. The results presented include studies on the resolution differences for real and complex data, resolution properties of the spectral estimates, and the determination of the relative power of the sinusoids from the spectral estimates... View full abstract»

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  • Some experiments in discrete utterance recognition

    Publication Year: 1982, Page(s):766 - 770
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    This paper is concerned with the following four aspects of the discrete utterance recognition problem: utterance normalization, dynamic programming (DP) algorithm implementation, boundary error effects, and the importance of the transition states in speech, Performance sensitivity as a function of each aspect of the problem is comparatively studied utilizing several available alternatives, and sig... View full abstract»

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  • Detecting a hidden periodic signal when its period is unknown

    Publication Year: 1982, Page(s):747 - 750
    Cited by:  Papers (23)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A simple method is presented for detecting an unknown periodic signal in additive noise. The period is unknown, but the amplitudes of the fundamental and the first M - 1 harmonics are known to be nonzero. One application is the detection of a torpedo by a submarine sonar system from the observed acoustic line spectrum generated by the torpedo's blade motion. View full abstract»

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  • On half-band, third-band, and Nth-band FIR filters and their design

    Publication Year: 1982, Page(s):734 - 738
    Cited by:  Papers (133)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Half-band FIR digital filters are known to be important due to their reduced computational requirements. They are especially valuable when used to decimate or interpolate by a factor of 2 [1], where their characteristics well match the filtering requirements. Computational savings can also be achieved by extending the concept of half-band filters to Nth-band filters for use in decimation or interp... View full abstract»

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  • A fast algorithm for the discrete sine transform implemented by the fast cosine transform

    Publication Year: 1982, Page(s):814 - 815
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    A method of composing the discrete sine transform from the discrete cosine transform is demonstrated. As a result of this method, the fast sine transform is accomplished by the existing implementation of the fast cosine transform. View full abstract»

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  • System identification techniques for adaptive noise cancelling

    Publication Year: 1982, Page(s):699 - 709
    Cited by:  Papers (36)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    A general form of a noise canceller is derived, using a signal modeling approach. The proposed structure combines two infinite impulse response filters: a noise canceller and a line enhancer. A recursive prediction error algorithm is used to adaptively estimate the filter coefficients. Preliminary simulation results on the performance of the generalized adaptive noise canceller are presented. View full abstract»

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  • Rational approximation of 2-D linear discrete systems

    Publication Year: 1982, Page(s):780 - 787
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    In this paper we present an efficient procedure to obtain a rational model for a 2-D linear shift-invariant, discrete system using first- and second-order data from it. This procedure is a modification of the nonlinear least-squares approximation, and it generalizes the Padé approximants and the spectral estimation modeling procedures. The parameters of the approximating filter are obtained b... View full abstract»

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  • Subband coder design incorporating recursive quadrature filters and optimum ADPCM coders

    Publication Year: 1982, Page(s):751 - 765
    Cited by:  Papers (59)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1448 KB)

    This paper presents the results of an analytical and experimental study of the use of IIR quadrature mirror filters and forward adapting ADPCM with optimum quantizers for octave band subband coders for speech. It is Shown that the underlying analysis-synthesis systems can be designed such that there is no interband aliasing distortion in the coded speech and such that the analysis-synthesis transf... View full abstract»

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  • Single chip filter bank with wave digital filters

    Publication Year: 1982, Page(s):709 - 718
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    An experimental implementation of a small digital filter bank on a commercially available Intel 2920 signal processor is reported. This processor is particularly suitable for implementation of wave digital structures since the shift-and-add arithmetic unit is very appropriate for exploiting the low coefficient word-length requirements of these structures. The measured results are in agreement with... 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