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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 6 • Date 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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  • 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)

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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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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1979, Page(s): c4
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  • An underwater acoustic pulse compression system

    Publication Year: 1979, Page(s):723 - 728
    Cited by:  Papers (6)
    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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  • 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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  • Time-domain measurement of loudspeaker driver parameters

    Publication Year: 1979, Page(s):734 - 739
    Cited by:  Papers (4)
    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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  • On tape-cut editing with a fixed head type PCM tape recorder

    Publication Year: 1979, Page(s):739 - 745
    Cited by:  Papers (2)
    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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  • Digital echo cancellation for baseband data transmission

    Publication Year: 1979, Page(s):768 - 781
    Cited by:  Papers (87)  |  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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  • On a microcomputer implementation of an intrusion-detection algorithm

    Publication Year: 1979, Page(s):782 - 789
    Cited by:  Papers (5)  |  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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  • Digital signal processing and time series analysis

    Publication Year: 1979, Page(s):659 - 660
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  • A new approach for the design of digital interpolating filters

    Publication Year: 1979, Page(s):637 - 643
    Cited by:  Papers (25)  |  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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  • A dynamic processing approach to phoneme recognition (part I)--Feature extraction

    Publication Year: 1979, Page(s):596 - 608
    Cited by:  Papers (6)
    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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  • 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 radix-4 FFT processor for application in a 60-channel transmultiplexer using TTL technology

    Publication Year: 1979, Page(s):746 - 751
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    A hardware solution for the two 128-point o2DFT processors with a transform time of 125 μs needed in a 60-channel transmultiplexer for conversion between FDM and TDM signals is presented. It is shown how the mathematical redundancy of the processing can be removed, thus leading to a structure where the two transforms are realized as a 64-point FFT processor with 64 complex pre- and... View full abstract»

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  • Near-field performance of passive coherence processing sonars

    Publication Year: 1979, Page(s):573 - 582
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    Recently, passive sonar systems using two or more stationary receivers have been used for the detection and localization of moving acoustic targets. In far-field configurations, where the receivers are remotely located from the source, the use of the magnitude-squared coherence function (MSCF) has proved attractive. In this paper near-field configurations are considered, where the interreceiver sp... 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 (9)
    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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  • Applications of adaptive digital filtering to the data processing for the environmental system

    Publication Year: 1979, Page(s):790 - 803
    Cited by:  Papers (6)
    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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  • Microcomputer-based digital filters for EEG processing

    Publication Year: 1979, Page(s):697 - 705
    Cited by:  Papers (3)
    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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  • Analytic signal processing in music computation

    Publication Year: 1979, Page(s):670 - 684
    Cited by:  Papers (6)  |  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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  • A memory compression scheme for modular arithmetic

    Publication Year: 1979, Page(s):608 - 611
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    It has recently been shown that high-speed fixed-point digital filtering can be realized using modular arithmetic (viz., residue arithmetic). In these studies modular arithmetic is performed using table lookup methods. Here, precomputed modular operations are accessed from high-speed ROM's and/or RAM's. However, when large dynamic ranges are required, table size requirements can become unrealistic... 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 (7)
    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 (12)  |  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