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ICASSP '83. IEEE International Conference on Acoustics, Speech, and Signal Processing

14-16 April 1983

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Displaying Results 1 - 25 of 373
  • [Front cover and table of contents]

    Publication Year: 1983, Page(s): 0
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  • Longer NTT's with 2 as a root of unity

    Publication Year: 1983, Page(s):159 - 162
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (130 KB)

    When the specialized hardware is not too severe a constraint, the most promising Number Theoretic Transforms are those with 2 as a root of unity, since they can be performed without multiplication. Unfortunately, for a given wordlength, previously known NTT's with 2 as a root of unity are too short (2^{2}^{t} + 1, 2^{2q}-2^{q}+1) or too long (3.2n+ 1). It is then important to... View full abstract»

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  • A fast algorithm for solving Toeplitz system of equations

    Publication Year: 1983, Page(s):166 - 169
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (103 KB)

    A fast algorithm for the solution of Toeplitz system of equations is presented. The algorithm requires orderN (log N)^{2}computations where N is the number of equations. For banded Toeplitz matrices the order of computations is reduced to onlyN log N + m (log m)^2where 2m is the maximum number of nonzero principal subdiagonals of the Toeplitz matrix. The algorithm is in essen... View full abstract»

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  • Efficient inversion of doubly block Toeplitz matrix

    Publication Year: 1983, Page(s):170 - 173
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (72 KB)

    An iterative algorithm for the inversion of a doubly block Toeplitz matrix consisting of m × m blocks of size p × p is described. The algorithm presented exploits the structure of the doubly block Toeplitz matrix and outperforms Akaike's algorithm by a factor ofmax {2 frac{p}{m},2}. The use of this algorithm for an iterative solution of a doubly block Toeplitz set of linear eq... View full abstract»

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  • Simultaneous design in both magnitude and group-delay of IIR and FIR filters: Problems and results

    Publication Year: 1983, Page(s):201 - 204
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

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  • On the synthesis of lattice parameter digital filters

    Publication Year: 1983, Page(s):213 - 216
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (78 KB)

    The synthesis of lattice parameter digital filters from a given z-transform transfer function is considered. Included are several versions of AR, MA and ARMA structures. The approach is based upon partial fraction expansions and leads to numerical algorithms for parameter calculation which are numerically robust in terms of zero and poles close to the unit circle as well as self correcting for fin... View full abstract»

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  • Segmentation-free syllable recognition in continuously spoken Japanese

    Publication Year: 1983, Page(s):320 - 323
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (82 KB)

    A new recognition algorithm for continuously spoken Japanese is proposed. Recognition is accomplished by finding an optimal syllable sequence using dynamic programming (DP) to avoid the segmentation problem. CV (consonant-vowel) and VCV (vowel-consonant-vowel) templates are used to deal with the co-articulation problem. The VCV templates are prepared only for a subset of vowel and consonant combin... View full abstract»

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  • Signal separation theory by using adaptive array

    Publication Year: 1983, Page(s):363 - 366
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    Signal separation theory by using adaptive arrays is a new thesis in array data processing. The model considered in this paper is that the array consists of N elements and the number of signal sources, which are separated in spatial location, is M andM leq N. By using the Hilbert transform of input signal and the directional incident angle matrix, a signal separation processor is formed... View full abstract»

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  • Equiripple two-dimensional interpolation filters

    Publication Year: 1983, Page(s):387 - 390
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (90 KB)

    Operations such as geometric image correction, feature matching, and coordinate system transformations require the resampling of two-dimensional data arrays to interpolate between the known regularly-spaced signal samples. A conventional approach is to apply consecutive 1- dimensional interpolating filters first across the array and then in the orthogonal direction to obtain the desired (dx View full abstract»

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  • 2-D state-space realizations with fewer multipliers and invariant norms

    Publication Year: 1983, Page(s):415 - 418
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (67 KB)

    A similarity transformation that reduces the number of multipliers in a given realization is presented. The transformation is orthogonal and thus preservesparallel A parallel. This guarantees that overflow stability is not sacrificed for fewer nonzero coefficients. It is shown that this transformation does not affect the sensitivity of the transfer function to variations in its coeffici... View full abstract»

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  • A distributed signal processor incorporating VLSI and high order language programming

    Publication Year: 1983, Page(s):439 - 442
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (92 KB)

    A distributed signal processor has been developed with the following objectives:bulletEfficient execution of signal processing functions such as Finite Impulse Response (FIR) filters, FFTs, beamformingbulletEasily programmed by systems engineers using a High Order Language (HOL)bulletLoose external coupling of the distributed signal processing elements to facilitat... View full abstract»

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  • Efficient FIR filter implementation using microprocessor

    Publication Year: 1983, Page(s):443 - 446
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (88 KB)

    An efficient approach for direct form FIR filter implementation using microprocessor is presented. The approach uses the positive number and the coefficient partitioning techniques. View full abstract»

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  • Speech recognition and noise

    Publication Year: 1983, Page(s):523 - 526
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (63 KB)

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  • A comparison of distance measures for text-independent speaker identification

    Publication Year: 1983, Page(s):559 - 562
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (62 KB)

    A survey of research efforts in the area of speaker recognition indicate that for the same choice of speaker-dependent speech parameters the recognition accuracy is significantly affected by the distance measure used. In this work several distance classifiers are evaluated for use in text-independent speaker identification. The four distance measures investigated are the Mahalanobis distance, maxi... View full abstract»

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  • Stochastic convergence properties of the adaptive gradient lattice

    Publication Year: 1983, Page(s):663 - 666
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (75 KB)

    A stochastic fixed-point theorem is used as a basis for the study of stochastic convergence properties (in mean-squares sense) of the adaptive gradient lattice filter. Such properties include conditions on the stepsize in the adaptive algorithm and analytic expressions for the misadjustment and convergence rate. View full abstract»

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  • Time-domain estimation of unambiguous Doppler frequency in low and medium PRF radars

    Publication Year: 1983, Page(s):687 - 690
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (99 KB)

    Rader [3] described an algorithm to estimate the period of undersampled periodic signal. We extend this method to estimate ambiguous Doppler frequency in low and medium pulse-repetition frequency (PRF) radars. Multiple PRF's are employed to resolve the ambiguity. The proposed method results in a constant false alarm rate detector. The performance of the algorithm in the presence of noise is presen... View full abstract»

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  • An adaptive feature extraction expert

    Publication Year: 1983, Page(s):750 - 752
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  • The use of linear constraints to reduce the variance of time of arrival difference estimates for source location

    Publication Year: 1983, Page(s):911 - 914
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (65 KB)

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  • Effect of record length on the correlation of complex exponentials

    Publication Year: 1983, Page(s):1092 - 1094
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (63 KB)

    Resolution of two sinusoidal signals of frequencies f1and f2requires a time record of length at least1/|f_{1}-f_{2}|. Resolution of two decaying exponentials of complex frequencies s1= σ1+jω1and s2= σ2+jω2, withsigma_{2} leq sigma_{1}, by correlation coefficient is inde... View full abstract»

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  • General - N Winograd D.F.T. programs with inverse option

    Publication Year: 1983, Page(s):1164 - 1167
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (111 KB)

    S. Winograd's papers "On computing the discrete Fourier transform" (1976 and 1978) allow one to know the minimum number of multiplications to compute a DFT if the length is a power of a prime and to build such algorithms for small lengths. It is suggested that longer transforms be 'built up' with the short algorithms. For this Winograd proposes and Kolba & Parks detail two ways I.J Good's prime fa... View full abstract»

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  • Speech processing for artificial tactile speech displays

    Publication Year: 1983, Page(s):1376 - 1379
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (70 KB)

    Two methods of encoding speech for tactile displays were compared in experiments which measured the discriminability of tactile representations of short speech segments. One display represented the short-term speech spectrum in time-swept mode and used vibration amplitude to encode spectral amplitude. The other represented the vocal-tract shape and length estimates as derived from LPC analysis of ... View full abstract»

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  • Complex matrix inversion algorithm for calculating digital system frequency response

    Publication Year: 1983, Page(s):1415 - 1418
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (102 KB)

    Given a signal flow graph for a digital system, one can read the matrix state equation and auxiliary equations needed to find outputs. Phasors are introduced by lettingz = exp(jw)where φ < w < 2π. Solution to the resulting matrix equation is based on a method by Froberg. The algorithm is illustrated by computing the response of a 5th order Butterworth frequency spectrum ... View full abstract»

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  • [Back cover]

    Publication Year: 1983, Page(s): c4
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    Freely Available from IEEE
  • The signal representation language SRL

    Publication Year: 1983, Page(s):1168 - 1171
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    SRL is a Lisp-based language for representing discrete-time signals as abstract objects whose properties reflect those of the represented signals. The basic concepts and facilities of SRL are motivated by a number of elementary observations about the mathematics of signals and the mathematical notations commonly employed to describe them. The fundamental activity in SRL programming is the implemen... View full abstract»

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  • High-resolution frequency estimation via a weighted forward and backward autoregressive modelling

    Publication Year: 1983, Page(s):1072 - 1075
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    A new method for generating the AR process parameters useful for spectral estimation is introduced. The method is based on weighted averaging of forward and backward models with weights proportional to the corresponding average energies of the linear prediction errors. It is demonstrated that improvements in resolution may be so obtained relative to equally weighted forward-backward schemes. It is... View full abstract»

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