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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 4 • August 1980

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  • [Front cover and table of contents]

    Publication Year: 1980, Page(s): 0
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    Freely Available from IEEE
  • Comments on "Line tracking using autoregressive spectral estimates"

    Publication Year: 1980, Page(s):475 - 479
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (443 KB)

    In [1], it was asserted that a spectral line tracker based upon the maximum entropy spectral estimator provides a "significant improvement in tracking performance" over a line tracker based on the Fourier transform spectral estimator. It is shown that the poor performance of the Fourier transform tracker was due in part to the particular implementation of the tracker. In fact, at low signal-to-noi... View full abstract»

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  • Digital image processing

    Publication Year: 1980, Page(s):484 - 486
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (447 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1980, Page(s): c4
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    Freely Available from IEEE
  • SHARF: An algorithm for adapting IIR digital filters

    Publication Year: 1980, Page(s):428 - 440
    Cited by:  Papers (139)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1448 KB)

    The concept of adaptation in digital filtering has proven to be a powerful and versatile means of signal processing in applications where precise a priori filter design is impractical. Adaptive filters have traditionally been implemented with FIR structures, making their analysis fairly straightforward but leading to high computation cost in many cases of practical interest (e.g, sinusoid enhancem... View full abstract»

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  • Windowless Techniques for LPC Analysis

    Publication Year: 1980, Page(s):421 - 427
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    The purpose of this work was to study, experimentally, two windowless LPC analysis algorithms for use in speech digitization. The two algorithms are a circular autocorrelation technique which utilizes the pseudoperiodic nature of voiced speed, and a reflection coefficient estimation technique suggestion by J. P. Burg. Both techniques showed considerable promise in the experimental results. View full abstract»

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  • A fast method for real-time median filtering

    Publication Year: 1980, Page(s):415 - 421
    Cited by:  Papers (111)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    A fast real-time algorithm is presented for median filtering of signals and images. The algorithm determines the kth bit of the median by inspecting the k most significant bits of the samples. The total number of full-word comparison steps is equal to the wordlength of the samples. Speed and hardware complexity of the algorithm is compared with two other fast methods for median filtering. View full abstract»

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  • Discrete transforms over polynomial rings with applications in computing multidimensional convolutions

    Publication Year: 1980, Page(s):407 - 414
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    Discrete transforms over polynomial rings are developed and rings that possess simple transform kernels are investigated. A polynomial transform is used to transform a linear multidimensional convolution into a set of one-dimensional noncircular convolutions. A mapping which can be used to convert a noncircular convolution into a circular one and vice versa is presented. This is used to map the on... View full abstract»

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  • Non-Wiener solutions of the adaptive noise canceller with a noisy reference

    Publication Year: 1980, Page(s):468 - 473
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The performance of the adaptive noise canceller is typically analyzed in terms of Wiener filter theory. However, it has recently been shown by Glover that a narrow-band signal in the reference at a frequency for which there is no correlated signal in the primary gives rise to a notch in the output spectrum, a solution which lies outside the scope of the classical theory. In this paper an analytic ... View full abstract»

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  • Voiced/Unvoiced/Silence discrimination of speech by delta modulation

    Publication Year: 1980, Page(s):398 - 407
    Cited by:  Papers (10)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    This paper presents a new method of voiced/unvoiced/ silence discrimination of speech. The decision algorithm is based on the results of counting bit alternations of the bit stream from linear delta modulation (LDM) of the speech signal and zero crossings of a band-pass filtered output of the decoded LDM signal. Computer simulation of the system with real speech has yielded accurate results. Econo... View full abstract»

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  • Distortion measures for speech processing

    Publication Year: 1980, Page(s):367 - 376
    Cited by:  Papers (209)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB)

    Several properties, interrelations, and interpretations are developed for various speech spectral distortion measures. The principle results are 1) the development of notions of relative strength and equivalence of the various distortion measures both in a mathematical sense corresponding to subjective equivalence and in a coding sense when used in minimum distortion or nearest neighbor speech pro... View full abstract»

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  • An analysis of multiple correlation cancellation loops with a filter in the auxiliary path

    Publication Year: 1980, Page(s):454 - 467
    Cited by:  Papers (200)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1536 KB)

    A technique known as a "multiple correlation cancellation loop" and also as the "LMS algorithm" is widely used in adaptive arrays for radar, sonar, and communications, as well as in many other signal processing applications. In this paper an analysis of this technique is extended to the case when a linear filter appears in the auxiliary signal path. A general solution to this problem is obtained a... View full abstract»

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  • A study of LPC analysis of speech in additive noise

    Publication Year: 1980, Page(s):389 - 397
    Cited by:  Papers (27)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    A study of the autocorrelation LPC analysis of speech in additive noise is presented. In the noise-free case it is shown that finite word length implementation of the analysis may produce stable but poor spectral estimates. The beneficial effects of proper preemphasis are reaffirmed in terms of decreased numerical error as well as decreased LPC order needed for a good spectral fit. For the ease of... View full abstract»

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  • Comparison of parametric representations for monosyllabic word recognition in continuously spoken sentences

    Publication Year: 1980, Page(s):357 - 366
    Cited by:  Papers (1382)  |  Patents (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1152 KB)

    Several parametric representations of the acoustic signal were compared with regard to word recognition performance in a syllable-oriented continuous speech recognition system. The vocabulary included many phonetically similar monosyllabic words, therefore the emphasis was on the ability to retain phonetically significant acoustic information in the face of syntactic and duration variations. For e... View full abstract»

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  • A useful property of the coefficients of a Walsh-Hadamard transform

    Publication Year: 1980, Page(s):479 - 480
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    It has been found that the coefficients of the Walsh-Hadamard transformation of a vector composed of integers have the interesting property of being all even or all odd. The following presents a proof of this property and suggests an application to data compression. View full abstract»

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  • A new autoregressive spectrum analysis algorithm

    Publication Year: 1980, Page(s):441 - 454
    Cited by:  Papers (136)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1168 KB)

    A new recursive algorithm for autoregressive (AR) spectral estimation is introduced, based on the least squares solution for the AR parameters using forward and backward linear prediction. The algorithm has computational complexity proportional to the process order squared, comparable to that of the popular Burg algorithm. The computational efficiency is obtained by exploiting the structure of the... View full abstract»

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  • Fast implementations of LMS adaptive filters

    Publication Year: 1980, Page(s):474 - 475
    Cited by:  Papers (186)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    A frequency domain implementation of the LMS adaptive transversal filter is proposed. This fast LMS (FLMS) adaptive filter requires less computation than the conventional LMS adaptive filter when the filter length equals or exceeds 64 sample points. View full abstract»

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  • Application of dynamic time warping to connected digit recognition

    Publication Year: 1980, Page(s):377 - 388
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1344 KB)

    A connected digit recognizer is proposed in which a set of isolated word templates is used as reference patterns and an unconstrained dynamic time warping (DTW) algorithm is used to literally "spot" the digits in the string. Segmentation boundaries between digits are obtained as the termination point of the dynamic path from the previous time warp. A region around the boundary is searched for the ... View full abstract»

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  • Corrections to "Bounds on the minimum number of data transfers in WFTA and FFT programs"

    Publication Year: 1980, Page(s):480 - 481
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    The relative performance of the 120 point WFTA and the 128 point FFT reported in the above paper [1] must be modified slightly due to errors in tabulation of arithmetic and data transfer operations. A correct comparison is presented in this correspondence. Nonetheless, the 120 point WFTA still remains the faster algorithm for the general-purpose computer architecture considered. View full abstract»

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  • High-speed computation of autocorrelation using rectangular transforms

    Publication Year: 1980, Page(s):481 - 483
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A technique based on the recently developed rectangular transforms is proposed for computing the autocorrelation function of a data sequence. The refinements suggested with the technique make it computationally more efficient than Rader's algorithm using the fast Fourier transform and the Winograd-Fourier transform algorithm, when the number of desired lag values is smaller than 30. However, the t... 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