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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 2 • April 1980

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Displaying Results 1 - 25 of 31
  • [Front cover and table of contents]

    Publication Year: 1980, Page(s): 0
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    Freely Available from IEEE
  • Comments on "An approach to eliminate roundoff errors in digital filters"

    Publication Year: 1980, Page(s): 244
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

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  • Author's reply

    Publication Year: 1980, Page(s):244 - 245
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  • Comments on "An extrapolation procedure for band-limited signals"

    Publication Year: 1980, Page(s): 254
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (129 KB)

    This is a comment on the equivalence between a paper recently published on the topic of band-limited signal extrapolation with others [1], [2] published previously. It is shown that the equations describing the iterative or recursive method, as well as those describing the one-step method of extrapolation, are identical. View full abstract»

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  • Comments on "Maximum entropy spectral estimation using the analytical signal"

    Publication Year: 1980, Page(s):259 - 260
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (279 KB)

    It is indicated that the reduced frequency estimation error noted in the above paper may well be due to the modification of the primary signal segment prior to analytical processing rather than to the analytical processing itself. View full abstract»

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  • Correction to "A short-term sequential regression algorithm"

    Publication Year: 1980, Page(s): 264
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  • [Back cover]

    Publication Year: 1980, Page(s): c4
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    Freely Available from IEEE
  • Intensity signal processing of images for optical to radar scene matching.

    Publication Year: 1980, Page(s):260 - 263
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The basic scene matching problem consists of locating a region of an image with the corresponding region of another view of the same scene. In the general case, the images axe produced by completely different sensors at different viewing geometries. Prior to the matching, digital signal processing must be performed to line up the two images geometrically and to match their intensities. Two intensi... View full abstract»

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  • Isolated word recognition using the weighted Levenshtein distance

    Publication Year: 1980, Page(s):243 - 244
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    The use of dynamic programming in isolated word recognition is interpreted in terms of symbols-string processing. The use of the weighted Levenshtein distance (WLD) is discussed. A modification of the WLD gives insensitivity to overall word duration while automatically discriminating against warping functions having excessively steep and excessively gentle portions. View full abstract»

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  • Frequency errors in MEM processing

    Publication Year: 1980, Page(s):257 - 259
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    A simple expression for the frequency error due to data truncation, sampling rate, and initial phase effects is derived for Burg's maximum entropy technique involving a single real sinusoid. Its usefulness as a guide to error estimation for high signal-to-noise cases is indicated by comparing it with the recently published results of a computer simulation. View full abstract»

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  • A new implementation algorithm of second-order IIR digital filters

    Publication Year: 1980, Page(s):248 - 249
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    In the implementation of a second-order IIR digital filter, five multiplications and four additions are required for each output sample calculation. In this correspondence we present a new implementation algorithm which requires four multiplications and seven additions per output sample, and the output sequence can be produced at uniform rate without introducing any artificial delay in the filter.... View full abstract»

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  • Parallel modular FIR digital filter

    Publication Year: 1980, Page(s):245 - 248
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    A parallel modular FIR digital filter structure is described which can achieve arbitrarily high sampling rates. Unlike pipeline and other published structures, the filter throughput need not be limited by the slowest arithmetic component in the system. High-speed performance is obtained by synchronous operation of a number of cooperating processors. This correspondence outlines the structure and g... View full abstract»

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  • Maximum entropy and the relationship of the partial autocorrelation to the reflection coefficients of a layered system

    Publication Year: 1980, Page(s):224 - 235
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1144 KB)

    A horizontally stratified half space bounded by a perfect reflector at the top gives rise to a seismogram which, when completed by the direct downgoing pulse at zero time and by symmetry about the origin for negative time, produces an autocorrelation function. If this autocorrelation is convolved with the corresponding prediction error operators of increasing length, we obtain a "gapped function,"... View full abstract»

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  • The generalized discrete Fourier transform in rings of algebraic integers

    Publication Year: 1980, Page(s):169 - 175
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    Conditions are presented for a transform of the DFT structure, defined in a ring of residues of a ring of algebraic integers, to map cyclic convolution isomorphically into a pointwise product. The conditions are used to verify that a number of potentially useful transforms (which require no general multiplications) satisfy this property. In particular, transforms defined in residue rings of the Ga... View full abstract»

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  • Two-dimensional signal processing

    Publication Year: 1980, Page(s): 266
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  • High-resolution narrow-band spectra by FFT pruning

    Publication Year: 1980, Page(s):254 - 257
    Cited by:  Papers (21)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    A new method of computing high-resolution narrow-band spectra faster than the chirp z transform (CZT) and direct computation of discrete Fourier transform (DFT) is presented. This is achieved by a generalization of Markel's pruning algorithm and in combination with Skinner's pruning algorithm for the decimation-in-time FFT formulation. However, for very high resolutions it is shown that the CZT is... View full abstract»

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  • Image restoration by short space spectral subtraction

    Publication Year: 1980, Page(s):191 - 197
    Cited by:  Papers (42)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1504 KB)

    A new image restoration system that is applicable to the problem of restoring an image degraded by blurring and additive noise is presented in this paper. The system is developed by attempting to estimate more accurately the frequency response of typical image restoration filters available in the literature. The resulting system combined with its short space implementation is computationally simpl... View full abstract»

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  • The short-time behavior of a frequency-warping power spectral estimator

    Publication Year: 1980, Page(s):176 - 183
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    This paper investigates the behavior of a nonlinear frequency-warping power spectral estimator when it is used with short input data sequences. Expressions are derived for the mean, variance, and covariances of the estimate. Some discussion is also included on variance reduction methods. View full abstract»

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  • A class of generalized lattice filters

    Publication Year: 1980, Page(s):198 - 204
    Cited by:  Papers (17)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    It is shown that the digital lattice filter utilized as a predictor in speech processing is a special case of a broad class of filters with identical properties in which the delay element is replaced by an arbitrary analog or digital all-pass filter. The performance of three filters in this class, the delay element and single-pole analog and digital all-pass sections, are compared for the special ... View full abstract»

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  • Sampling representation of sequency-band-limited nonstationary random processes.

    Publication Year: 1980, Page(s):249 - 251
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    The sampling theorem for sequency-band-limited dyadic stationary processes is generalized to accommodate sequency-band-limited nonstationary random processes. In addition, some error bounds for truncated sampling expansions are derived. Furthermore, in the course of this development, Poisson sum formulas are established to suit Walsh transforms. View full abstract»

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  • Spectral mismatch due to preemphasis in LPC analysis/Synthesis

    Publication Year: 1980, Page(s):263 - 264
    Cited by:  Papers (9)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    The standard first-order preemphasis approach used in linear prediction analysis results in an undesirable low-frequency boost in the synthesis spectrum. A solution is obtained by mismatching the preemphasis and postemphasis factors or by using a particular second-order preemphasis filter. View full abstract»

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  • Alternating sequential-parallel versions of FFT

    Publication Year: 1980, Page(s):236 - 242
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    For those applications where FFT is only one of the processing jobs, it is suggested that general purpose instead of special, parallel hardware should be used. The model hardware works in an "alternating sequential-parallel" mode. It is shown that for certain known, parallel FFT algorithms the achievable speedup is not sufficient. A simple algorithm is then developed and is shown to lead to high s... View full abstract»

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  • Number theory in digital signal processing

    Publication Year: 1980, Page(s):265 - 266
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  • Recursive discrete Fourier transformation

    Publication Year: 1980, Page(s):184 - 190
    Cited by:  Papers (89)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    This paper presents new discrete Fourier transform methods which are recursive, expressible in state variable form, and which involve real number computations. The algorithms are especially useful for running Fourier transformation and for general and multirate sampling. Numerical examples are given which illustrate the ability of these spectral observers to operate at sampling rates other than th... View full abstract»

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  • A training procedure for isolated word recognition systems

    Publication Year: 1980, Page(s):129 - 136
    Cited by:  Papers (18)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    A procedure has been devised to reduce the amount of training required for a phoneme-based speaker-dependent word recognition system and still maintain performance. Each new speaker is required to provide utterances of only a fraction of the entire vocabulary as a training set. A set of transformation rules is used to estimate phoneme templates for the entire vocabulary from phoneme templates incl... 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