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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 4 • August 1986

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Displaying Results 1 - 25 of 51
  • [Front cover and table of contents]

    Publication Year: 1986, Page(s): 0
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    Freely Available from IEEE
  • Corrections to "Finding the poles of lattice filter"

    Publication Year: 1986, Page(s): 1000
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (126 KB)

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  • Adaptive signal processing

    Publication Year: 1986, Page(s):1017 - 1018
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (329 KB)

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  • Optimum signal processing: An introduction

    Publication Year: 1986, Page(s):1018 - 1019
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  • [Back cover]

    Publication Year: 1986, Page(s): c4
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    Freely Available from IEEE
  • Efficient calculation of signal and noise variances

    Publication Year: 1986, Page(s):1002 - 1004
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The performance of most algorithms in communications and signal processing is dependent upon the input signal-to-noise ratio (SNR). It is therefore useful to estimate input signal and noise variances. In this study, a method is developed for estimating these variances, given the input and output energies for a zero-phase band-pass filter and knowledge of the shapes, but not the amplitudes, of the ... View full abstract»

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  • Structured fast Hartley transform algorithms

    Publication Year: 1986, Page(s):1000 - 1002
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The flowgraph originally proposed for the computation of the radix-2 fast Hartley transform (FHT) is restructured for clarity and ease of implementation with hardware and software. By applying the transposition theorem to the newly formed flowgraph (which corresponds to a decimation-in-time algorithm), a decimation-in-frequency algorithm with a similar flowgraph is obtained. The number of operatio... View full abstract»

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  • Array filters for attenuating coherence interference in the presence of random noise

    Publication Year: 1986, Page(s):661 - 668
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    Array filters are derived for processing recorded measurements of an array of sensors in order to extract a desired signal buried in a background of interfering coherent and random noises. The intersensor travel times and relative amplitudes of the coherent noise and the statistics of the random noise are assumed to be known. The derivation of the filters is done in two steps. First, the family of... View full abstract»

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  • On the design of fault-tolerant signal detectors

    Publication Year: 1986, Page(s):973 - 978
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    In this paper we analyze the effects of hardware faults on the performance of computer-implemented signal detectors, as measured by the probability of detection and the probability of false alarm. We then use these results to design fault-tolerant detectors using hard-ware redundancy. View full abstract»

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  • The stepdown procedure for complex predictor coefficients

    Publication Year: 1986, Page(s):1010 - 1011
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    The stepdown procedure is an algorithm in which the predictor parameters of a direct form digital filter are converted to the corresponding real reflection coefficients of a digital lattice filter. In this correspondence, a derivation of the stepdown procedure for complex predictor parameters is presented. The complex stepdown procedure is a useful tool for applications ranging from complex filter... View full abstract»

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  • Two-channel speech analysis

    Publication Year: 1986, Page(s):730 - 743
    Cited by:  Papers (95)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB)

    We present a two-channel technique for improving speech analysis in certain applications. One channel is the signal from an electroglottograph (EGG), which monitors the vibratory motion of the vocal folds. The other channel is the speech signal obtained from a conventional microphone. We show how the EGG can be used as a tool for validating speech processing algorithms and estimating possible lowe... View full abstract»

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  • High performance signal-modeling by pencil-of-functions method: Band-pass case

    Publication Year: 1986, Page(s):997 - 1000
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    We discuss an extension of the pencil-of-functions method, namely, the use of band-pass processing filters, and show that this leads to considerably enhanced modeling of band-pass signals. The theory of such processing is presented and an example is given which demonstrates the efficacy of the technique at moderate to high levels of data noise. View full abstract»

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  • Expansions of the likelihood ratio and applications

    Publication Year: 1986, Page(s):653 - 660
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The likelihood ratio receiver, although optimal, is oftentimes difficult to realize. To overcome this difficulty, suboptimal approximations have been studied in the past. One of the simplest approaches is to expand the likelihood ratio and truncate this expansion under the weak signal assumption. In this paper, we first study the relations between the Taylor expansion and the Volterra expansion. U... View full abstract»

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  • A note on "Realization of digital filters using input-scaled floating-point arithmetic"

    Publication Year: 1986, Page(s): 995
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    In [1] and [2], a theoretical Bode plot with experimental data points is shown. The experimental data points on the Bode plot are not correct. View full abstract»

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  • Stack filters

    Publication Year: 1986, Page(s):898 - 911
    Cited by:  Papers (444)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1888 KB)

    The median and other rank-order operators possess two properties called the threshold decomposition and the stacking properties. The first is a limited superposition property which leads to a new architecture for these filters; the second is an ordering property which allows an efficient VLSI implementation of the threshold decomposition architecture. Motivated by the success of rank-order filters... View full abstract»

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  • Gradient algorithms for designing predictive vector quantizers

    Publication Year: 1986, Page(s):679 - 690
    Cited by:  Papers (78)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1168 KB)

    A predictive vector quantizer (PVQ) is a vector extension of a predictive quantizer. It consists of two parts: a conventional memoryless vector quantizer (VQ) and a vector predictor. Two gradient algorithms for designing a PVQ are developed in this paper: the steepest descent (SD) algorithm and the stochastic gradient (SG) algorithm. Both have the property of improving the quantizer and the predic... View full abstract»

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  • Recursive Wiener filtering for image restoration

    Publication Year: 1986, Page(s):990 - 992
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    In this correspondence, a backward recursive solution of Wiener filtering technique for restoration of noisy image, is presented. The algorithm exploits the band structure of the correlation matrices. View full abstract»

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  • Identification of image and blur parameters for the restoration of noncausal blurs

    Publication Year: 1986, Page(s):963 - 972
    Cited by:  Papers (120)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1304 KB)

    An optimal statistical parameter estimation technique is presented for the identification of unknown image and blur model parameters. The development leads to an autoregressive moving average (ARMA) model identification problem, where the image model coefficients define the AR part, and the blur parameters define the MA part. Conditional maximum-likelihood estimates of the unknown parameters are d... View full abstract»

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  • Digital signal restoration using fuzzy sets

    Publication Year: 1986, Page(s):919 - 936
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2064 KB)

    A new signal restoration method with considerable flexibility in incorporating a priori information is developed. The method defines a fuzzy set for each piece of information to restrict the set of acceptable solutions. Using fuzzy sets makes it possible to model partially defined information as well as exact knowledge. The intersection of all the fuzzy sets is the feasibility set. The original si... View full abstract»

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  • Formant tracking using hidden Markov models and vector quantization

    Publication Year: 1986, Page(s):709 - 729
    Cited by:  Papers (28)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2128 KB)

    This paper describes an approach to formant tracking based on hidden Markov models and vector quantization of LPC spectra. Two general classes of models are developed, differing in whether formants are tracked singly or jointly. The states of a single-formant model are scalar values corresponding to possible formant frequencies. The states of a multiformant model are frequency vectors defining pos... View full abstract»

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  • Index transforms of multidimensional cyclic convolutions and discrete Fourier transforms

    Publication Year: 1986, Page(s):996 - 997
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    In this correspondence, general equations are described for computing the so-called index transforms which map the m-dimensional discrete Fourier transform (DFT) and cyclic convolution (CC) on n-dimensional DFT or CC, respectively. These transforms are based on mapping indexes of input and output sequences of DFT or CC operators. The general form of these transforms is found, and the necessary and... View full abstract»

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  • Realization of first-order two-dimensional all-pass digital filters

    Publication Year: 1986, Page(s):1011 - 1013
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A structure to realize a first-order two-dimensional all-pass transfer function with five multipliers and two delays has been proposed. This has been achieved by modifying the signal flowgraph of an existing structure which uses six multipliers and two delays. The multipliers of the proposed structure are shown to be real for stable filters. View full abstract»

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  • A new noiseless coding technique for binary images

    Publication Year: 1986, Page(s):944 - 951
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    In this paper, a new coding technique for binary images is proposed. This technique makes use of the fact that boundaries contain all the information about such images. The boundary information is obtained by consecutive application of a simple one-dimensional technique in each of the spatial dimensions. The compression efficiency is then further increased by the reduction of correlation between c... View full abstract»

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  • Systolic architectures for connected speech recognition

    Publication Year: 1986, Page(s):765 - 779
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1816 KB)

    Systolic arrays for two connected speech recognition methods are presented. The first method is based on the dynamic time warping algorithm which is applied directly on acoustic feature patterns. The second method is the probabilistic matching algorithm which requires that the input sentence be preprocessed by a phonetic analyzer. It is shown that both methods may be implemented on either a two-di... View full abstract»

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  • Effect of word-length truncation on quantized Gaussian random variables

    Publication Year: 1986, Page(s):1004 - 1006
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The effect of dividing a quantized Gaussian random variable by an integer N and truncating the remainder is studied. Applications include word-length truncation in digital signal processing when N is a power of 2. It is shown that for an input standard deviation greater than about N/3, the output bias and excess variance are approximately constant and equal to -(N - 1)/2N and (1 - 1/N2)... 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