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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 5 • Date October 1977

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Displaying Results 1 - 17 of 17
  • [Front cover and table of contents]

    Publication Year: 1977, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (165 KB)
    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1977, Page(s): c4
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    Freely Available from IEEE
  • Stable and efficient lattice methods for linear prediction

    Publication Year: 1977, Page(s):423 - 428
    Cited by:  Papers (146)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    A class of stable and efficient recursive lattice methods for linear prediction is presented. These methods guarantee the stability of the all-pole filter, with or without windowing of the signal, with finite wordlength computations, and at a computational cost comparable to the traditional autocorrelation and covariance methods. In addition, for data-compression purposes, quantization of the refl... View full abstract»

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  • Sharpening the response of a symmetric nonrecursive filter by multiple use of the same filter

    Publication Year: 1977, Page(s):415 - 422
    Cited by:  Papers (104)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    When processing data by filters, we often find it necessary to improve the performance of the filter, either by increasing the out-of-band rejection (loss) or by decreasing the error in the passband, or both. A first approach is to process the data by repeated passes through the same filter. Each pass, while increasing the out-of-band loss, also increases the passband error, often to an undesirabl... View full abstract»

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  • Discrete Hilbert transform filtering

    Publication Year: 1977, Page(s):452 - 454
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A discrete filtering technique based on circular convolution is presented. The discrete Hilbert transform (DHT), in matrix form and other matrices for filtering by circular convolution, is shown to compare favorably with DFT and FFT filtering. The comparison is presented in terms of error accumulation. View full abstract»

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  • A necessary and sufficient condition for quantization errors to be uniform and white

    Publication Year: 1977, Page(s):442 - 448
    Cited by:  Papers (186)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    In this paper, a necessary and sufficient condition is given to model the output of a quantizer as an infinite-precision input and an additive, uniform, white noise. The statistical properties of the quantization error are studied, and a detailed analysis for Gaussian distributed inputs is given. View full abstract»

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  • Efficient solution of covariance equations for linear prediction

    Publication Year: 1977, Page(s):429 - 433
    Cited by:  Papers (75)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    An algorithm for the solution of the linear equations for the "covariance method" of linear prediction is stated and proved. The algorithm requires only O(p2) arithmetic operations, and in form resembles the Levinson algorithm for solution of the linear equations for the "correlation method" of linear prediction. The structural properties of the problem and its solution are emphasized i... View full abstract»

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  • Simple Békésy-type audiometer for clinical use

    Publication Year: 1977, Page(s):449 - 450
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    A simple self-administering audiometer is described that presents a pure tone whose frequency automatically increases from 20 Hz to 20 kHz and whose intensity automatically decreases or increases (according to whether or not the subject is pressing a button) between -20 and 80 dB (ANSI 1969) normal range. The rates at which frequency and intensity vary may be preset over continuously adjustable ra... View full abstract»

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  • Detecting and locating key words in continuous speech using linear predictive coding

    Publication Year: 1977, Page(s):361 - 367
    Cited by:  Papers (23)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    This paper considers the problem of automatically detecting and locating key words in a stream of continuous speech. The system described here is a template-matching procedure which uses as its basic waveform features a set of linear prediction coefficients. The similarity measure between a segment of the template and a segment of the incoming speech stream is taken to be a ratio of minimum predic... View full abstract»

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  • Fast algorithms for complex integer transforms

    Publication Year: 1977, Page(s):450 - 452
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    In this correspondence both high-radix and real-valued input FFT algorithms are applied to transforms over the finite field GF(q2), where q is a Mersenne prime. Such transforms can be used to implement fast circular convolutions without roundoff error. Of particular interest is a new radix 8 FFT algorithm, which requires fewer multiplications than the conventional radix 8 FFT algorithm. View full abstract»

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  • The 1976 modular acoustic processor(MAP)

    Publication Year: 1977, Page(s):367 - 379
    Cited by:  Papers (17)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    The modular acoustic processor (MAP), a complex experimental system for automatic derivation of phonemic string output for continuous speech, has stages dedicated to signal analysis, spectral classification, phonemic segmentation, phonemic (steady state) classification, phoneme boundary placement, dyadic (transitional) classification, and final phoneme string consolidation. This paper presents the... View full abstract»

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  • New algorithms for digital convolution

    Publication Year: 1977, Page(s):392 - 410
    Cited by:  Papers (94)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1744 KB)

    It is shown how the Chinese Remainder Theorem (CRT) can be used to convert a one-dimensional cyclic convolution to a multi-dimensional convolution which is cyclic in all dimensions. Then, special algorithms are developed which, compute the relatively short convolutions in each of the dimensions. The original suggestion for this procedure was made in order to extend the lengths of the convolutions ... View full abstract»

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  • An algorithm for designing constrained least squares filters

    Publication Year: 1977, Page(s):410 - 414
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    This paper describes a practical computer algorithm for the solution of constrained least squares (CLS) filtering equations. This algorithm exploits the block-Toeplitz and block-circulant properties of the filtering equations. Specifically, these properties are utilized to adapt Kutikov's and Akaike's algorithms for the solution of block-Toeplitz systems. Our approach leads to an economical algori... View full abstract»

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  • Microprocessor realization of a linear predictive vocoder

    Publication Year: 1977, Page(s):379 - 387
    Cited by:  Papers (15)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    A microprocessor realization for a linear predictive vocoder is presented. The goal was a low-power, low-cost, compact special-purpose realization of a narrow-band speech terminal. The resultant design is a general-purpose two-bus structure running at a 150 ns cycle time, using as the basic signal processing element, four of the AMD 2901 CPE chips. This basic structure is augmented by a four-cycle... View full abstract»

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  • An algorithm for testing stability of discrete systems

    Publication Year: 1977, Page(s):454 - 456
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    A new algorithm for testing stability of discrete systems is derived, using methods in the z-domain exclusively. It is based on the stability test presented in [2] where the continued fraction method is used. View full abstract»

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  • Synthesis part of a "Log area ratio" vocoder in analog hardware

    Publication Year: 1977, Page(s):387 - 391
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    A speech output terminal for use with a digital computer, corresponding to the synthesis part of a predictive vocoder, is described. It is implemented mainly by analog components, employing as the all-pole synthesis filter the author's previously published analog discrete-time filter. The inverse-hyperbolic-tangent values of the PARCOR (or reflection) coefficients are the control parameters, which... View full abstract»

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  • LPC prediction error--Analysis of its variation with the position of the analysis frame

    Publication Year: 1977, Page(s):434 - 442
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    The LPC prediction error provides one measure of the success of linear prediction analysis in modeling a speech signal. Although a great deal is known about the properties of the prediction error, relatively little has been published about its variation as a function of the position of the analysis frame. In this paper it is shown that a fairly substantial variation in the prediction error is obta... 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