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IEEE Transactions on Acoustics, Speech, and Signal Processing

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)

    First Page of the Article
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  • Guest editorial

    Publication Year: 1979, Page(s): 669
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1979, Page(s): c4
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  • Digital processing of ionospheric electron content data

    Publication Year: 1979, Page(s):705 - 712
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    Ionospheric electron content data contain periodicities that are produced by a diversity of sources including hydromagnetic waves, gravity waves, and lunar tides. Often these periodicities are masked by the strong daily variation in the data. Digital filtering can be used to isolate the weaker components. The filtered data can then be further processed to provide estimates of the source properties... View full abstract»

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  • A new approach for the design of digital interpolating filters

    Publication Year: 1979, Page(s):637 - 643
    Cited by:  Papers (33)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    The paper presents a new class of interpolators characterized by the property that the mean power of their error sequence, as a function of frequency, approximates zero in the Chebyshev sense. The design method, which is based on some observation and newly found general properties, will be described in some detail. An example shows the special properties of these interpolators in comparison with f... View full abstract»

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  • Fortran subroutines for the solution of Toepltiz sets of linear equations

    Publication Year: 1979, Page(s):656 - 658
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Two subroutines for the solution of a Toeplitz set of m linear equations are presented. The symmetric case requires 3m memory locations, while the nonsymmetric case requires 5m memory locations. View full abstract»

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  • On the problem of designing IIR digital filters with short coefficient word lengths

    Publication Year: 1979, Page(s):620 - 624
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    The paper presents an algorithm for designing IIR digital filters with short coefficient word lengths. The algorithm has the flexibility of obtaining a better design at the expense of investing more computational time. It was found that, by incorporating Crochiere's idea of equalizing passband and stopband statistical word lengths before applying the algorithm, we are capable of obtaining a furthe... View full abstract»

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  • Digital echo cancellation for baseband data transmission

    Publication Year: 1979, Page(s):768 - 781
    Cited by:  Papers (97)  |  Patents (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2304 KB)

    In analogy with analog speech transmission, simultaneous two-way ("full-duplex") transmission of data signals over two-wire circuits can, in principle, be achieved by the application of hybrid couplers. In practice the resulting imperfect isolation between transmitter and receiver at the same end of a connection is disastrous for the detection of the data from the other end and has to be nullified... 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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  • A simple fixed-point error bound for the fast Fourier transform

    Publication Year: 1979, Page(s):615 - 620
    Cited by:  Papers (11)
    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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  • Microcomputer-based digital filters for EEG processing

    Publication Year: 1979, Page(s):697 - 705
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1176 KB)

    Fourth-order bandpass recursive digital filters, realized in cascade form, are implemented in a 16-bit microprocessor, enabling sampling frequencies up to 3.3 kHz, with the use of the processor's multiply instruction. The design did not follow the usual choice of canonical forms and scaling within the filter structure. On the contrary, the input wordlength is set at 12 bits and the filters are all... 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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  • 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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  • 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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  • An introduction to statistical signal processing with applications

    Publication Year: 1979, Page(s):660 - 661
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    First Page of the Article
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  • A dynamic processing approach to phoneme recognition (part I)--Feature extraction

    Publication Year: 1979, Page(s):596 - 608
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1232 KB)

    This paper presents a new approach to phonemic feature extraction, which is one of the essential components of the study to develop an automatic speech recognition system. The feature extraction method is composed of three levels, i.e., frequency analysis, peak-band enhancement, and local peak extraction. The latter two levels consist of a multistage processing structure and are made by using anal... View full abstract»

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  • Design of a 24-channel transmultiplexer

    Publication Year: 1979, Page(s):752 - 762
    Cited by:  Papers (40)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    The design of a transmultiplexer capable of performing the bilateral conversion between one 1544 kbit/s digital signal (which represents 24 PCM coded voice channels) and two analog group signals (each one containing 12 voice channels in the 60-108 kHz band) is investigated. It is shown that an FIR filter bank required as part of such a transmultiplexer can be realized efficiently by cascading a di... 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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  • Debiasing equation error frequency detection of a noisy sinusoid without noise variance prespecification

    Publication Year: 1979, Page(s):654 - 656
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The bias in the equation error estimation of the parameters of an oscillatory difference equation, the free response of which is obscured by white zero-mean noise, adversely influences frequency estimates of the underlying sinusoid. A nonlinear mapping debiasing the frequency estimate supports a novel philosophy for parameter identification. Discrepancies in simulation of the resulting approach pi... 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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Aims & Scope

This Transactions ceased production in 1990. The current retitled publication is IEEE Transactions on Signal Processing.

Full Aims & Scope