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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 3 • June 1985

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Displaying Results 1 - 25 of 43
  • [Front cover and table of contents]

    Publication Year: 1985, Page(s): 0
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    Freely Available from IEEE
  • A generalization of Rudin's multivariable stability theorem

    Publication Year: 1985, Page(s):725 - 728
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (385 KB)

    Rudin's N-variable stability theorem requires testing, in addition to a multidimensional condition on the distinguished boundary, a single one-variable condition. A generalization of Rudin's theorem is presented in this paper, in which the single-variable condition is replaced with n single-variable conditions where1 leq n leq Nat one's choice. The tradeoff is between simpler and a smal... View full abstract»

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  • Correction to "Quadrature mirror filter design for an arbitrary number of equal bandwidth channels"

    Publication Year: 1985, Page(s): 765
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (57 KB)

    First Page of the Article
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  • Correction to "A zero-crossing consistency method for formant tracking of voiced speech in high noise levels"

    Publication Year: 1985, Page(s): 765
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (57 KB)

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  • Principles of acoustic devices

    Publication Year: 1985, Page(s):766 - 767
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  • [Back cover]

    Publication Year: 1985, Page(s): c4
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    Freely Available from IEEE
  • Fast Hankel transform algorithm

    Publication Year: 1985, Page(s):666 - 671
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The Hankel, or Fourier-Bessel, transform is an important computational tool for optics, acoustics, and geophysics. It may be computed by a combination of an Abel transform, Which maps an axisymmetric two-dimensional function into a line integral projection, and a one-dimensional Fourier transform. This paper presents a Hankel transform algorithm using a fast (linear time) Abel transform, followed ... View full abstract»

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  • Performance evaluation of the modified Yule-Walker estimator

    Publication Year: 1985, Page(s):719 - 725
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    The modified Yule-Walker (MYW) equations are often used to estimate the autoregressive parameters of time series. The asymptotic estimation error variance of these parameters can be computed using a formula developed for the instrumental variable method. The performance of the MYW estimator is studied by evaluating this formula for different signal-to-noise ratios and process bandwidths, as a func... View full abstract»

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  • C-windows

    Publication Year: 1985, Page(s):753 - 760
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    All current windows have spectra that eventually decay as some inverse power of frequency, i.e., they roll off at a fixed number of decibels per octave. However, faster decay rates are possible. View full abstract»

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  • An approach to the realization of a programmable FIR digital filter

    Publication Year: 1985, Page(s):741 - 744
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    It is shown that by varying the tap coefficients of a generalized transversal filter structure consisting of a tapped cascade of identical FIR subfilters, it is possible to implement an FIR digital filter with adjustable magnitude response. By choosing a few different FIR structures as subfilters, an overall FIR filter with a wide variation in magnitude response can be realized. An implementation ... View full abstract»

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  • On the statistics of fixed-point roundoff error

    Publication Year: 1985, Page(s):595 - 606
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    Roundoff error after fixed-point multiplication is commonly modeled as uniformly distributed white noise that is uncorrelated with the signal. This paper presents a statistical analysis of fixed-point roundoff error that identifies the conditions under which this model is valid, and examines the statistical behavior of roundoff error when these conditions are not satisfied. The results show that i... View full abstract»

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  • Effects of uncompensated relative time companding on a broad-band cross correlator

    Publication Year: 1985, Page(s):505 - 510
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    Cross correlating two received waveforms is an accepted method of estimating the differential time delay (DTD) of a common signal in two waveforms, as well as detecting the signal. Rarely is the DTD actually constant over the correlation integration time, although this assumption can be made if the variation is small enough compared to the integration time and the signal bandwidth. This paper cons... View full abstract»

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  • A table reduction technique for logarithmically architected digital filters

    Publication Year: 1985, Page(s):718 - 719
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The logarithmic number system (LNS) has been shown to offer high speed and precision metrics. Unfortunately, in practice, its precision is limited by the addressing space of high-speed semiconductor memory. An algorithm is presented which significantly reduces this memory requirement. As a result, both high speeds and precision can be obtained using the existing ECL, HMOS, or bipolar hardware. View full abstract»

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  • A vector-quantization-based preprocessor for speaker-independent isolated word recognition

    Publication Year: 1985, Page(s):546 - 560
    Cited by:  Papers (14)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1696 KB)

    In this paper, we propose a speaker-independent isolated ward recognition system whose performance is comparable to that of a conventional isolated word recognizer, but whose computation is greatly reduced. The structure of the proposed recognizer consists of a word-based vector quantization (VQ) preprocessor, followed by a conventional DTW postprocessor. The purpose of the preprocessor is essenti... View full abstract»

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  • A speaker-independent, syntax-directed, connected word recognition system based on hidden Markov models and level building

    Publication Year: 1985, Page(s):561 - 573
    Cited by:  Papers (52)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1288 KB)

    In the last several years, a wide variety of techniques have been developed which make practical the implementation and development of large networks for recognizing connected sequences of words. Included among these techniques are efficient and accurate speech modeling methods (e.g., vector quantization, hidden Markov models) and efficient, optimal network search procedures (i.e., level building)... View full abstract»

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  • Human speaker recognition performance of LPC voice processors

    Publication Year: 1985, Page(s):752 - 753
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Immediate identification of speakers' voices can be highly important to efficient communication in certain applications. This correspondence describes an experimental investigation to determine the human speaker recognition performance of LPC voice processors. A small group of coworkers were used as the test subjects. The test results indicate the importance of high-frequency data bandwidth for sp... View full abstract»

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  • Image compression results using the LMS adaptive algorithm

    Publication Year: 1985, Page(s):712 - 714
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    The LMS algorithm may be used to adapt the coefficients of an adaptive prediction filter for image source encoding. Results are presented which show LMS may provide almost 2 bits per symbol reduction in transmitted bit rate compared to DPCM when distortion levels are approximately the same for both methods. Alternatively, LMS can be used in fixed bit-rate environments to decrease the reconstructed... View full abstract»

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  • Author's reply to "Comments and corrections to 'on the eigenvectors of symmetric Toeplitz matrices' "

    Publication Year: 1985, Page(s):737 - 738
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    This correspondence describes three types of matrix symmetries: (transpose) symmetry, centrosymmetry, and persymmetry. Double symmetry is then defined in terms of these three types. Finally, an operation called the cross transpose is proposed to aid in dealing with matrices exhibiting these symmetries. View full abstract»

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  • A method of eliminating a bias in the normalized circular lattice algorithm

    Publication Year: 1985, Page(s):728 - 731
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    In this paper, we analyze fixed-point errors in the normalized circular lattice algorithm for multivariate autoregressive system identification, based on the method of Samson and Reddy [4]. Using the results of this analysis, we modify the normalized circular lattice algorithm so as not to yield the bias in the estimated PARCOR coefficients, and justify the modification by computer simulations. View full abstract»

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  • ALE behavior for two sinusoidal signal models

    Publication Year: 1985, Page(s):658 - 665
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    The adaptive line enhancer (ALE) weight covariance matrix is determined for a complex monochromatic sine wave signal in an independent circular Gaussian noise background. The weight covariance matrix is shown to differ significantly from that obtained when the signal is a narrow-band sine wave process. In spite of this result, the misadjustment factors which characterize the mean-norm squared erro... View full abstract»

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  • Matrix quantizer design for LPC speech using the generalized Llyod algorithm

    Publication Year: 1985, Page(s):537 - 545
    Cited by:  Papers (39)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    Rate-distortion theory provides the motivation for using data compression techniques on matrices of N LPC vectors. This leads to a simple extension of speech coding techniques using vector quantization. The effects of using the generalized Lloyd algorithm on such matrices using a summed Itakura-Saito distortion measure are studied, and an extension of the centroid computation used in vector quanti... View full abstract»

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  • Cross correlation and energy detection in multiarray processing

    Publication Year: 1985, Page(s):493 - 504
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    Multiple arrays can be modeled as a single array that is composed of separate subarrays. Likelihood ratio testing, maximum likelihood delay-Doppler estimation, and maximum likelihood estimation of signal and noise parameters are applied to such a model in order to determine whether cross correlation should be used alone or in conjunction with other operations. The results indicate that cross corre... View full abstract»

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  • Viterbi algorithm detector for Bernoulli-Gaussian processes

    Publication Year: 1985, Page(s):511 - 519
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    This paper shows how to apply the Viterbi algorithm to detect randomly located impulses which have Gaussian distributed amplitudes. Our detector can deal with cases of severely overlapping wavelets. Experimental results and comparisons to Kormylo and Mendel's [12] single-most-likely-replacement detector are provided, using synthetic data. View full abstract»

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  • A sparse RNS system

    Publication Year: 1985, Page(s):744 - 748
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The residue number system, or RNS, has attracted increased attention recently. Using the concurrent processing capabilities of the RNS, high-speed digital filters have been designed. However, the RNS uses memory table lookup operations to perform its arithmetic. Therefore, the RNS can be a prodigious consumer of semiconductor memory chips. In this paper, a procedure is presented which will admit t... View full abstract»

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  • A new method to compensate for the sample-and-hold distortion

    Publication Year: 1985, Page(s):738 - 741
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The aim of this correspondence is to develop a superior method to compensate for any kind of distortion caused by the interpolation of uniform samples. The spectra of interpolating functions, such as a zero-order hold, are analyzed. As a consequence, a novel method is proposed to equalize the distortion of an interpolating function. The realization is fairly simple and modular in concept. 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