IEEE Transactions on Acoustics, Speech, and Signal Processing

Volume 27 Issue 6 • December 1979

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Displaying Results 1 - 25 of 38
  • [Front cover and table of contents]

    Publication Year: 1979, Page(s): 0
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  • An efficient algorithm for a large Toeplitz set of linear equations

    Publication Year: 1979, Page(s):612 - 615
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    An algorithm is presented which requires2n^{2} + 8n log_{2} n - ncomputations for solving a set ofnlinear Toeplitz equations for n = 2k, where k is a positive integer. The previously known algorithms require a minimum of 3n2computations. The major advantage of the algorithm is realized for those applications where the set of n Toeplitz equations Tx = c i... View full abstract»

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  • Comments on "The theory of transient intermodulation distortion"

    Publication Year: 1979, Page(s):653 - 654
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (262 KB)

    The conditions for avoiding transient intermodulation distortion (TIMD) in a feedback amplifier have been overstated. There is no TIMD penalty whatsoever in using high loop gain around a forward path that has a dominant pole, provided the forward-path gain is concentrated after this dominant pole. View full abstract»

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  • Authors' reply

    Publication Year: 1979, Page(s): 654
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (147 KB)

    First Page of the Article
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  • Correction to "Nonminimal realizations of fixed point digital filters that are free of all finite wordlength limit cycles"

    Publication Year: 1979, Page(s): 658
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (70 KB)

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  • Guest editorial

    Publication Year: 1979, Page(s): 669
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  • [Back cover]

    Publication Year: 1979, Page(s): c4
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  • A hardware multitone digital frequency synthesizer

    Publication Year: 1979, Page(s):804 - 809
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    The synthesis of two or more tones simultaneously has numerous applications, including telephone signaling, music synthesis, waveform generation, and man-machine communications. We describe a hardware approach in which the basic tones are generated digitally for accuracy and stability, using time-shared circuitry. The tones are combined and their levels are controlled by an analog approach using a... View full abstract»

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  • Analytic signal processing in music computation

    Publication Year: 1979, Page(s):670 - 684
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    Digital synthesis of music has led to the consideration of models other than the usual additive (Fourier) synthesis of waveforms. One of these methods, based on the FM equation, has been found to be of particular value due to its easy implementation and the richness and evolutionary character of its harmonic structure in time. Any useful synthesis procedure should be accompanied by a corresponding... View full abstract»

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  • Optimal design of FIR digital filters with monotone passband response

    Publication Year: 1979, Page(s):643 - 649
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    The application of linear programming to the design of FIR digital filters with constraints on the derivative of the frequency response is described. Numerical considerations in the implementation are discussed and a program is given with examples for the design of filters with optional monotone response in passbands. The method provides the user with an additional degree of flexibility over the R... View full abstract»

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  • Applications of adaptive digital filtering to the data processing for the environmental system

    Publication Year: 1979, Page(s):790 - 803
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (992 KB)

    In this paper a least mean-square (LMS) adaptive digital filter (ADF) is used in order to detect the extraordinary levels of air pollution data, to predict the future air pollution levels, and to identify the unknown parameters in the environmental system. The technique used here is based on the recursive adaptive digital filtering method proposed by White, which is an extension of the usual ADF b... View full abstract»

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  • An underwater acoustic pulse compression system

    Publication Year: 1979, Page(s):723 - 728
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    This paper describes the signal processing scheme used in sources and receivers for the remote acoustic measurement of the oceanic sound velocity field. Ocean sound velocity varies in response to interior dynamic processes so that a continuous sound field measurement is expected to provide a unique view of physical oceanographic phenomena. The basic signal processing technique uses maximal length ... View full abstract»

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  • Image enhancement by stochastic homomorphic filtering

    Publication Year: 1979, Page(s):625 - 637
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4128 KB)

    The problem of image enhancement by nonlinear two-dimensional (2-D) homomorphic filtering is approached using stochastic models of the signal and degradations. Homomorphic filtering has been previously used for image enhancement, but the linear filtering operation has generally been chosen heuristically. In this paper stochastic image models previously described and analyzed by the authors are use... View full abstract»

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  • Time-domain measurement of loudspeaker driver parameters

    Publication Year: 1979, Page(s):734 - 739
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    A new method for the measurement of the Thiele-Small small-signal parameters of a moving-coil electromagnetic transducer driver is described. The technique is based on a time-domain analysis of the transient response of the loudspeaker voice-coil circuit to a current step of excitation. By sampling the damped sinusoidal transient generated by such an excitation, the loudspeaker parameters can be c... View full abstract»

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  • An introduction to statistical signal processing with applications

    Publication Year: 1979, Page(s):660 - 661
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    First Page of the Article
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  • On a microcomputer implementation of an intrusion-detection algorithm

    Publication Year: 1979, Page(s):782 - 789
    Cited by:  Papers (6)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1000 KB)

    The main objective of this paper is to discuss various aspects of implementing a specific intrusion-detection scheme on a micro-computer system using fixed-point arithmetic. The proposed scheme is suitable for detecting intruder stimuli which are in the form of transient signals. It consists of two stages: an adaptive digital predictor and an adaptive threshold detection algorithm. Experimental re... View full abstract»

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  • Some unique signal processing applications in power system planning

    Publication Year: 1979, Page(s):685 - 697
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1728 KB)

    Three applications of digital signal processing in power system planning are discussed. The use of a vector radix 2-D FFT in a spatial load growth model has reduced computation time for spatial convolutions by an order of magnitude. The character of a power system is used to derive a set of 2-D digital filters that represent the power system's sensitivity to spatial load forecast-design errors. Sy... View full abstract»

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  • Two-level DP-matching--A dynamic programming-based pattern matching algorithm for connected word recognition

    Publication Year: 1979, Page(s):588 - 595
    Cited by:  Papers (149)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    This paper reports a pattern matching approach to connected word recognition. First, a general principle of connected word recognition is given based on pattern matching between unknown continuous speech and artificially synthesized connected reference patterns. Time-normalization capability is allowed by use of dynamic programming-based time-warping technique (DP-matching). Then, it is shown that... View full abstract»

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  • Shifted sideband beamformer

    Publication Year: 1979, Page(s):713 - 722
    Cited by:  Papers (13)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    A fundamentally different time domain beamformer structure is described which can be used to process bandpass sensor signals efficiently. The beamformer operates directly on complex, frequency translated, single sideband representations of the input signals to obtain a similar representation of the beam output. Such representations are typically obtained by complex demodulation of the signals to f... View full abstract»

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  • A PCM/ADM and ADM/PCM code converter

    Publication Year: 1979, Page(s):762 - 768
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    In this paper a bidirectional code converter system that converts PCM to ADM and ADM to PCM directly in the digital domain is studied. The particular coding schemes chosen for study are the μ-255 PCM with the rate of 64 kbits/s and the continuously variable slope delta modulation (CVSD) with 32 kbits/s. Efficient realization of the converter hardware is also considered. View full abstract»

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  • A simple fixed-point error bound for the fast Fourier transform

    Publication Year: 1979, Page(s):615 - 620
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    Error bounds for the computation of the fast Fourier transform in fixed-point arithmetic are derived for any arithmetic number base and for any prime factorization of the data array length. The intended application is for signal processing with minicomputers. Errors arising from inaccurate sine coefficients and from limited arithmetic precision are considered. The arithmetic error depends essentia... View full abstract»

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  • Speaker-independent isolated word recognition for a moderate size(54 word)vocabulary

    Publication Year: 1979, Page(s):583 - 587
    Cited by:  Papers (28)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Recent work at Bell Laboratories has shown that statistical clustering techniques could be used to provide a reliable set of reference templates for a speaker-independent isolated-word recognition system. The vocabulary on which the system was tested consisted of the 26 letters of the alphabet, the 10 digits (0 to 9), and 3 command words. Since this vocabulary consisted of a large number of acoust... View full abstract»

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  • Image modeling and quality criteria

    Publication Year: 1979, Page(s):649 - 652
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    When an image which is disturbed by additive noise is recursively filtered, the filter is derived from a dynamic model based on the second-order statistics of the original image and noise. For given image statistics, it is possible to consider different models. The choice of a model may influence the quality of the filter results. To compare different models representing the same image, three qual... View full abstract»

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  • A speech digitizer at 2400 bits/s

    Publication Year: 1979, Page(s):729 - 733
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    This paper describes a speech digitizer that is capable of transmitting and receiving at 2400 bits/s. Comparisons are made between this implementation and past approaches. Typical applications of such digitizers are also described. View full abstract»

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  • On tape-cut editing with a fixed head type PCM tape recorder

    Publication Year: 1979, Page(s):739 - 745
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1144 KB)

    The PCM tape recorder should perform the traditional function of recording for practical use in studios. Along with electronic editing, tape-cut editing will also play an important role in studio work. Advantages of tape-cut editing are as follows. 1) Editing time can be minimized if splice points are not numerous. 2) Editing can be performed with only one PCM deck without expensive electronic equ... 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