IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 4 • August 1977

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

    Publication Year: 1977, Page(s): 0
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    Freely Available from IEEE
  • Application of an LPC distance measure to the voiced-unvoiced-silence detection problem

    Publication Year: 1977, Page(s):338 - 343
    Cited by:  Papers (30)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (617 KB)

    One of the most difficult problems in speech analysis is reliable discrimination among silence, unvoiced speech, and voiced speech which has been transmitted over a telephone line. Although several methods have been proposed for making this three-level decision, these schemes have met with only modest success. In this paper, a novel approach to the voiced-unvoiced-silence detection problem is prop... View full abstract»

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  • Comments on "A new hardware realization of digital filters"

    Publication Year: 1977, Page(s):353 - 354
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The purpose of this short note is to point out that in the above paper the operation speed (word rate) of infinite-duration impulse-response (IIR) filters is different from that of the finite-duration impulse-response (FIR) filters, and in the high-speed realization case, the difference is even larger. View full abstract»

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  • A review of delta modulation systems

    Publication Year: 1977, Page(s):355 - 356
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (294 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1977, Page(s): c4
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    Freely Available from IEEE
  • A phase-locking technique for estimating the ensemble average of time-series data

    Publication Year: 1977, Page(s):295 - 299
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    A digital method employing Fourier analysis is presented, which in the absence of any external synchronizing signals can, with certain restrictions, 1) reduce random noise from repetitive frames of sampled input data; and 2) average waveforms which may differ in shape and which may occur in the presence or absence of random noise. The restrictions refer to the ability to select a window width whic... View full abstract»

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  • Minimum uncorrelated unit noise in state-space digital filtering

    Publication Year: 1977, Page(s):273 - 281
    Cited by:  Papers (285)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    For the class of digital filters described by the state equations, new expressions for the roundoff noise and the dynamic-range constraint equation have been established. Then, minimization of the roundoff noise subject to the l2norm dynamic-range constraint is considered. Using the polar decomposition of a nonsingular matrix, the effects of an equivalent transformation on the noise are... View full abstract»

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  • Computation rate and storage estimation in multirate digital filtering with half-band filters

    Publication Year: 1977, Page(s):344 - 346
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    Estimations are derived for the computation rate and the volume of storage needed in sequences of half-band finite-duration impulse-response (FIR) filters used for sample rate reduction or increase. Application to narrow-band filtering is considered and two illustrative examples are given. The accurate and quick evaluation of the half-band filter approach obtained is useful for general design and ... View full abstract»

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  • Long-term feature averaging for speaker recognition

    Publication Year: 1977, Page(s):330 - 337
    Cited by:  Papers (36)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    The potential benefits of long-term parameter averaging for speaker recognition were investigated. Parameters studied were pitch, gain, and reflection coefficients. Parameter variability was computed over various averaging lengths from one frame averaging (in effect, no averaging) to 1000 frame averaging (about 70 s of speech). It was demonstrated that the between-to-within speaker variance ratio,... View full abstract»

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  • Constrained least squares filtering

    Publication Year: 1977, Page(s):346 - 350
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    In the following we: 1) present a frequency domain derivation of the constrained least squares filter, which is much simpler than previous approaches relying on the diagonalization of block circulant matrices; 2) derive a lower bound on the Lagrange multiplier appearing in the filter and obtain conditions under which the Lagrange multiplier may assume negative values; and 3) indicate how the frequ... View full abstract»

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  • On amplitude-weighted instantaneous frequencies

    Publication Year: 1977, Page(s):351 - 353
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The instantaneous frequency of a signal may be uniquely defined from the analytical signal. However, for a Gaussian signal, this frequency has an infinite variance and is useless. Instead, amplitude-weighted instantaneous frequencies are often used. Here it is shown that if powers of the envelope Ak(t), k = 1, 2, 3,.. are used as weight factors, the first power minimizes the variance fo... View full abstract»

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  • A prime factor FFT algorithm using high-speed convolution

    Publication Year: 1977, Page(s):281 - 294
    Cited by:  Papers (189)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    Two recently developed ideas, the conversion of a discrete Fourier transform (DFT) to convolution and the implementation of short convolutions with a minimum of multiplications, are combined to give efficient algorithms for long transforms. Three transform algorithms are compared in terms of the number of multiplications and additions. Timing for a prime factor fast Fourier transform (FFT) algorit... View full abstract»

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  • Linear prediction with a variable analysis frame size

    Publication Year: 1977, Page(s):322 - 330
    Cited by:  Papers (3)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    This paper describes a speech analysis-synthesis system based on stationary linear prediction formulation. This system uses a variable analysis frame size concept. The k-parameters are used to represent the spectral information in the speech. The statistical and quantization properties of k-parameters are studied in detail. A method for calculating the analysis frame size based on energy and pitch... View full abstract»

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  • Adaptive transform coding of speech signals

    Publication Year: 1977, Page(s):299 - 309
    Cited by:  Papers (160)  |  Patents (79)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    This paper discusses speech coding systems based upon transform coding (TC). It compares several transforms and shows that the cosine transform leads to a nearly optimum performance for almost all speech sounds. Various adaptive coding strategies are then investigated, and a coding scheme is proposed that is based on a nonadaptive discrete cosine transform (DCT), on an adaptive bit assignment, and... View full abstract»

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  • Linear prediction of speech

    Publication Year: 1977, Page(s):354 - 355
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    First Page of the Article
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  • A symmetry relationship for "Between" scaling in cascade digital filters

    Publication Year: 1977, Page(s):350 - 351
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    This correspondence examines a symmetry relationship for fixed-point cascade digital filters having no error sources in the numerator and scaled with L2norm factors which are placed between the filter's subsections. It is shown that the noise gain of any ordering is the same as its inverse. It is also shown that the symmetry property holds for filters implemented in 1D and 2D form. View full abstract»

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  • An assessment of the technology of automatic speech recognition for military applications

    Publication Year: 1977, Page(s):310 - 322
    Cited by:  Papers (15)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1704 KB)

    The objective of this paper is to provide a summary of the state-of-the-art of automatic speech recognition (ASR) and its relevance to military applications. Until recently, speech recognition had its widest application in the development of vocoders for narrow-band speech communications. Presently, research in ASR has been accelerated for military tasks such as command and control, secure voice s... 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