IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 6 • December 1975

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  • [Front cover and table of contents]

    Publication Year: 1975, Page(s): 0
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    Freely Available from IEEE
  • Bode plot analysis of linear discrete-time systems

    Publication Year: 1975, Page(s):525 - 529
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (486 KB)

    The equivalent continuous-time transfer functionH(z)|_{z=e}^{jomegaT}of a linear discrete-time system may be evaluated using standard Bode plot techniques. The utility of these techniques is extended in this paper through a frequency-scale warping of the Bode plot and a mapping from thezplane to polar coordinates (rather than the more commonly used Cartesian coordinates) in t... View full abstract»

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  • Asymptotic equivalence of spectral representations

    Publication Year: 1975, Page(s):547 - 551
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (518 KB)

    This paper develops necessary and sufficient conditions under which for every sequence of matrices diagonal in an orthonormal basis{u}there exists an asymptotically equivalent sequence in the class of matrices diagonal in some other basis{upsilon}. These conditions can be expressed in terms of a doubly stochasticN times Nmatrix A whose entries Aijare the... View full abstract»

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  • Correction to "Fast convolution with finite field fast transforms"

    Publication Year: 1975, Page(s): 585
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    First Page of the Article
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  • [Back cover]

    Publication Year: 1975, Page(s): c4
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    Freely Available from IEEE
  • Generalized transforms

    Publication Year: 1975, Page(s):586 - 591
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    A recent class of continuous transforms is generalized to give an infinite number of new transforms. A frequency interpretation of the transform base functions gives fast generalized transform (FGT) matrices using standard digit reversal techniques. Examples of FGT factorizations are given. Advantages of the generalized transforms include continuous transform properties for system design and analy... View full abstract»

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  • Epoch extraction of voiced speech

    Publication Year: 1975, Page(s):562 - 570
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    A general theory of epoch extraction of overlapping nonidentical waveforms is presented. The theory is applied to outputs of models of voiced speech production mechanism and to actual speech data. Some typical glottal waveshapes are considered to explain their effect on the speech output. It is shown that the points of excitation of the vocal tract can be precisely identified for continuous speech... View full abstract»

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  • A new hardware realization of high-speed fast Fourier transformers

    Publication Year: 1975, Page(s):543 - 547
    Cited by:  Papers (17)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    A new approach to the hardware implementation of high-speed processors dedicated to perform the fast Fourier transform (FFT) in real time is presented. This approach capitalizes on recent advances in semiconductor memory technology to eliminate conventional multipliers, and is shown to offer significant reductions in hardware complexity and power consumption. It also yields a highly modular hardwa... View full abstract»

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  • Detection, location, and removal of delay-free loops in digital filter configurations

    Publication Year: 1975, Page(s):558 - 562
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Simple graph-theoretic methods for the detection and location of delay-free loops in a digital filter configuration are outlined along with a method to develop an equivalent realization without delay-free loops. View full abstract»

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  • On monotonicity of Lpand lpnorms

    Publication Year: 1975, Page(s):593 - 594
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    The Lpand lpnorms are continuous functions of the parameter p. The monotonic properties of four norms most commonly used in engineering are discussed. View full abstract»

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  • A semiautomatic pitch detector (SAPD)

    Publication Year: 1975, Page(s):570 - 574
    Cited by:  Papers (23)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    The purpose of this paper is to describe a technique for semiautomatically determining the pitch contour of an utterance. The method is significantly more sophisticated than the standard technique of hand tracking of pitch periods from a waveform display of the utterance and leads to a fairly robust measurement of the pitch period. This technique utilizes a simultaneous display (on a 10 ms section... View full abstract»

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  • Speech synthesis

    Publication Year: 1975, Page(s): 597
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

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  • The importance of phase in image processing filters

    Publication Year: 1975, Page(s):529 - 542
    Cited by:  Papers (92)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    We demonstrate that phase accuracy is extremely important in image processing filters and express the hope that more work will be done on the development of filter design techniques which use phase as well as magnitude specifications. View full abstract»

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  • Hadamard transforms of some specially shuffled signals

    Publication Year: 1975, Page(s):580 - 583
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    Changes in the Hadamard transform of a vector are investigated under two conditions: 1) shifting the elements of the vector cyclically for 2lplaces and 2) interchanging any two elements of the vector. The two-dimensional case is also investigated including shifting and interchanging of rows or columns. View full abstract»

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  • On the stability of the least mean-square inverse process in two-dimensional digital filters

    Publication Year: 1975, Page(s):583 - 585
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    In this correspondence we consider the stability of the Shank's least mean-square inverse design technique for the synthesis of two-dimensional recursive digital filters and show that this process always produces filters satisfying conditions necessary and sufficient for stability in one dimension. We do not answer the complete stability question, but provide a necessary condition in order for thi... View full abstract»

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  • Applications of a nonlinear smoothing algorithm to speech processing

    Publication Year: 1975, Page(s):552 - 557
    Cited by:  Papers (220)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    In this paper a nonlinear smoothing algorithm recently proposed by Tukey is described and evaluated for speech processing applications. Simple linear smoothing routines generally fail to provide adequate smoothing for data which exhibit both local roughness and sharp discontinuities. The proposed nonlinear smoothing algorithm can effectively smooth such data by using a combination of median smooth... View full abstract»

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  • Speech sounds and features

    Publication Year: 1975, Page(s): 596
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

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  • Necessary and sufficient conditions for the absence of overflow phenomena in a second-order recursive digital filter

    Publication Year: 1975, Page(s):509 - 515
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Due to adder overflow, different stationary output signals can be obtained from a digital filter for the same input signal. This phenomenon is discussed for a second-order recursive digital filter, resulting in a definition of stability of a digital system with respect to a certain input signal. A necessary and sufficient condition for unique steady-state solutions for a filter using a saturation ... View full abstract»

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  • Numerical determination of the lip impedance and vocal tract area functions

    Publication Year: 1975, Page(s):574 - 580
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    Two new methods based on a nonuniform acoustic tube model of the vocal tract are developed: a method for estimating the lip impedance zeros and poles directly from the speech wave and a method for computing the area function noniteratively from given lip impedance singularities. View full abstract»

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  • BIFORE phase spectrum and the modified Hadamard transform

    Publication Year: 1975, Page(s):594 - 595
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    A fast method for calculating the BIFORE phase spectrum for different circular shifts of the input data is developed. A simple relationship between the BIFORE phase spectrum and the modified Hadamard transform (MHT) coefficients is established. It is also pointed out that given the BIFORE power spectrum and the phase spectrum for circular shifts of 0 to (N/2 - 1), the input data can be reconstruct... View full abstract»

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  • On adaptors for wave digital filters

    Publication Year: 1975, Page(s):516 - 525
    Cited by:  Papers (76)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    The adders and multipliers of a wave digital filter (WDF) can be grouped into n-port building blocks called adaptors. Various aspects concerning the realization of adaptors are discussed. These include the minimization of the number of adders, the replacement of parallel adaptors by series adaptors and vice versa, possibilities for combining ideal transformers with adaptors without requiring inver... View full abstract»

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  • On the exact evaluation of discrete Fourier transforms

    Publication Year: 1975, Page(s):585 - 586
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    A theorem regarding the evaluation of discrete transforms recently proven by Rader is generalized to give a lower bound on the number of digits required to evaluate a z transform for arbitrary radix. View full abstract»

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  • Dynamic range constraint in state-space digital filtering

    Publication Year: 1975, Page(s):591 - 593
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The Lpscaling techniques of Jackson are reviewed, and the lpscaling techniques are defined; then the properties of the Lpand lpnorms are discussed and compared. The l2norm scaling is proposed as the most convenient method in the state-space digital filtering. 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