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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 4 • Date August 1979

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Displaying Results 1 - 24 of 24
  • [Front cover and table of contents]

    Publication Year: 1979, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (336 KB)
    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1979, Page(s): c4
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    Freely Available from IEEE
  • 2-D recursive phase filters for the solution of two-dimensional wave equations

    Publication Year: 1979, Page(s):367 - 373
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    This paper deals with two-dimensional wave equation migration in seismic Signal processing according to a frequency domain model. The required ideal phase specifications are approximated by a 2-D all-pass digital filter with symmetric half-plane hyperbolic impulse response. Examples are included to compare this recursive filtering approach with existing processing techniques. View full abstract»

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  • Numerical evaluation of Hankel transforms via Gaussian-Laguerre polynomial expansions

    Publication Year: 1979, Page(s):361 - 366
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    Hankel transforms of individual members of the orthonormal set of Gaussian-Laguerre (G-L) functions yield the same functional form as the original members. Thus, the Hankel transform of arbitrary functions can be accomplished in principle by expanding the function into G-L functions and using the same expansion coefficients for calculating the Hankel transformation. Numerical evaluation for the ci... View full abstract»

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

    Publication Year: 1979, Page(s):394 - 398
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Bounds on the minimum number of data transfers (i.e., loads, stores, and copies) required by WFTA and FFT programs are presented. The analysis is applicable to those general-purpose computers with M general processor registers (e.g., the IBM 370, PDP-11, etc.) where 4 \leq M \ll transform length. It is shown that the 1008- point WFTA requires about 21 percen... View full abstract»

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  • An adaptive nonrecursive linear phase MTI filter based on nonuniform spectral resolution of input

    Publication Year: 1979, Page(s):426 - 428
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    This correspondence describes a method of adaptively filtering signals with time-varying spectra. In this method the short term spectrum of the signal is estimated by using a modified periodogram scheme. Also, the spectral resolution is made unequal so as to get more spectral components in the frequency region of interest. This spectrum estimate is used in designing an MTI filter which is desired ... View full abstract»

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  • Minimum and mixed phase speech analysis-synthesis by adaptive homomorphic deconvolution

    Publication Year: 1979, Page(s):328 - 335
    Cited by:  Papers (15)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1536 KB)

    In this paper short-time homomorphic analysis, the harmonic representation of speech, and the spectral smoothing interpretation of homomorphic deconvolution are explored, resulting in adaptive time-domain windowing and logmagnitude smoothing techniques for improved spectral estimates and enhanced quality of a minimum phase homomorphic vocoder. With an adaptive window alignment scheme a slowly vary... View full abstract»

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  • Two-dimensional discrete Hilbert transform and computational complexity aspects in its implementation

    Publication Year: 1979, Page(s):356 - 360
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    It is first shown that the impulse response operator for a two-dimensional discrete Hilbert transform (DHT), although not by itself sum-separable, becomes so after appropriate classification. Subsequently, it is proved that the multiplicative complexity of computation of a two-dimensional DHT is not greater than twice the sum of multiplicative complexities of two one-dimensional DHT's. Finally, th... View full abstract»

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  • Error analysis of ADPCM-FFT

    Publication Year: 1979, Page(s):424 - 426
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    A realization of the discrete Fourier transform using the ADPCM as the analog-to-digital conversion scheme is presented. Quantitative analysis is given for the output noise due to truncation error, roundoff error, input quantization, and due to finite bit representation of coefficients. View full abstract»

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  • Speaker-independent recognition of isolated words using clustering techniques

    Publication Year: 1979, Page(s):336 - 349
    Cited by:  Papers (78)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2624 KB)

    A speaker-independent isolated word recognition system is described which is based on the use of multiple templates for each word in the vocabulary. The word templates are obtained from a statistical clustering analysis of a large database consisting of 100 replications of each word (i.e., once by each of 100 talkers). The recognition system, which accepts telephone quality speech input, is based ... View full abstract»

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  • Efficient solutions of linear equations with banded Toeplitz matrices

    Publication Year: 1979, Page(s):421 - 423
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Using the structure of the inverse of a Toeplitz matrix and some simplifications resulting when the Toeplitz matrix is banded, algorithms for the solution of a set of n linear equations involving Such a matrix are obtained. The algorithm, like Gaussian elimination, requires O(n) arithmetic operations. View full abstract»

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  • Optimum estimation of time delay by a generalized correlator

    Publication Year: 1979, Page(s):373 - 380
    Cited by:  Papers (85)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1344 KB)

    Optimum filters are designed to enhance the estimation of time delay between signals received at two spatially separate sensors. The resulting filters are placed in the predetection stage of a basic cross correlator. The transfer functions of the optimum filters are derived to operate according to two stated performance criteria. One selected criterion maximizes the expected peak at the time delay... View full abstract»

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  • Statistical properties of AR spectral analysis

    Publication Year: 1979, Page(s):402 - 409
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1216 KB)

    This paper investigates several statistical properties of the autoregressive (AR) spectral analysis method by using the periodogram technique recently devised by the author. When the data are made up of several sinusoids contaminated by stationary noise, the asymptotic variances of the AR spectral estimator are given. It is shown numerically that the behavior of the variances is similar to Kromer ... View full abstract»

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  • Estimation of singular values of an image matrix

    Publication Year: 1979, Page(s):434 - 436
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    The singular value decomposition (SVD) has been investigated for data compression. The behavior of the singular values of an image has been related to its autocorrelation. This is helpful in judging the suitability of an image for SVD. View full abstract»

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  • An approach to segmenting speech into vowel-and nonvowel-like intervals

    Publication Year: 1979, Page(s):319 - 327
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1696 KB)

    A speaker-independent algorithm is given for segmenting continuous speech in English into vowel-like (V) and nonvowel-like (NV) intervals. The algorithm has three stages: measurements (parameter extraction), phonetic feature detection, and V/NV decision. In measurements, the broad-band rms energy, the back-to-total cavity volume ratio (BTR), the signed front-to-back maximum area ratio (SFBR), and ... View full abstract»

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  • Digital color image processing within the framework of a human visual model

    Publication Year: 1979, Page(s):380 - 393
    Cited by:  Papers (92)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4040 KB)

    Evidence that the way brightness and chromatic information are processed by the human visual system is relevant to the field of image processing is presented. A three-dimensional homomorphic model for human color vision is outlined. Applications of this model to color image enhancement, transmission, coding, and to the definition of a distortion measure between such images are shown. View full abstract»

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  • Least squares glottal inverse filtering from the acoustic speech waveform

    Publication Year: 1979, Page(s):350 - 355
    Cited by:  Papers (83)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1272 KB)

    Covariance analysis as a least squares approach for accurately performing glottal inverse filtering from the acoustic speech waveform is discussed. Best results are obtained by situating the analysis window within a stable closed glottis interval. Based on a linear model of speech production, it is shown that both the moment of glottal closure and opening can be determined from the normalized tota... View full abstract»

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  • On the equivalence between the Kaiser-Hamming sharpening procedure and the McClellan transformation for FIR digital filter design

    Publication Year: 1979, Page(s):423 - 424
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    In this correspondence it is shown that the Kaiser-Hamming procedure for sharpening the response of a symmetric one-dimensional FIR digital filter and the transformation design method for two-dimensional FIR filters, (originally due to McClellan) are mathematically equivalent. The different viewpoints concerning this common idea suggest generalizations to both approaches. View full abstract»

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  • A prescription of winograd's discrete Fourier transform algorithm

    Publication Year: 1979, Page(s):409 - 421
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1928 KB)

    A detailed prescription of Winograd's DFT algorithm is presented with the aid of a summarizing table covering all cases and a set of tableaus describing the eight basic algorithms. The presentation is devoid of any theory or derivation. These are available in [3] from which the present paper has been extracted. View full abstract»

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  • Some good fields and rings for computing number theoretic transforms

    Publication Year: 1979, Page(s):432 - 433
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The number of multiplications required to compute number-theoretic transforms may be reduced by auspicious choice of the field or ring in which the computation is to be done. One method is to perform the computation in a direct sum of relatively small finite fields, using table lookups in lieu of multiplications in some or all of the component fields and using the Chinese Remainder Theorem to obta... View full abstract»

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  • A winograd-Fourier transform algorithm for real-valued data

    Publication Year: 1979, Page(s):398 - 402
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    A modified version of the Winograd-Fourier transform algorithm is presented for use in transforming real vectors. The new algorithm uses real arithmetic and real storage of intermediate results throughout while retaining the economy of Winograd's basic method. The derivation of the transform is explained and some programming techniques are discussed and illustrated. View full abstract»

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  • On some properties of a piecewise linear basis set

    Publication Year: 1979, Page(s):428 - 430
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    A set of piecewise linear basis functions called the integral Walsh basis set is defined, and some of its properties are discussed. View full abstract»

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  • Epoch extraction from linear prediction residual for identification of closed glottis interval

    Publication Year: 1979, Page(s):309 - 319
    Cited by:  Papers (113)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1832 KB)

    In voiced speech analysis epochal information is useful in accurate estimation of pitch periods and the frequency response of the vocal tract system. Ideally, linear prediction (LP) residual should give impulses at epochs. However, there are often ambiguities in the direct use of LP residual since samples of either polarity occur around epochs. Further, since the digital inverse filter does not co... View full abstract»

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  • Do not use a chirp to test a DFT program

    Publication Year: 1979, Page(s):430 - 432
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    It is shown that the choice of a chirp waveform is a poor one for testing most algorithms which compute the discrete Fourier transform. The Winograd-Fourier transform algorithm is especially susceptible to program bugs which will not be detected by computing the transform of a chirp sequence. 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