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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 3 • Date June 1982

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Displaying Results 1 - 24 of 24
  • [Front cover and table of contents]

    Publication Year: 1982, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (364 KB)
    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1982, Page(s): c4
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    Freely Available from IEEE
  • A note on complexity reduction for linear predictive speech synthesis

    Publication Year: 1982, Page(s):516 - 519
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    Most linear predictive speech synthesis (LPSS) algorithms employ a deemphasis filter with a fixed transfer function subsequent to the time varying LPSS filter. The excitation signal for the LPSS filter is usually a stored waveform sequence, repeated at the pitch period, for voiced sounds or a noise sequence for Unvoiced sounds. In either case the excitation signal is approximately white. A computa... View full abstract»

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  • Enhancement of sinusoids in colored noise and the whitening performance of exact least squares predictors

    Publication Year: 1982, Page(s):353 - 363
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2056 KB)

    The extraction of sinusoids in white noise using least squares predictors has attracted a lot of attention in the past, mainly in the context of the adaptive line enhancer (ALE). However, very few results exist for the practical colored noise case or for the whitening performance of the predictors. We use a matrix formulation to derive the optimal least squares coefficients and frequency response ... View full abstract»

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  • Some comments on bias/Misalignment effects in the magnitude squared coherence estimate

    Publication Year: 1982, Page(s):511 - 513
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    This correspondence presents a simple functional model for obtaining the magnitude squared coherence (MSC) estimate. The decrease in the approximated mean of the estimate with signal misalignment is shown to be a function of the signal spectrum and misalignment time, τ. The mean of the estimate in the absence of a signal common to both channels is shown to be a product of the bandwidth of the... View full abstract»

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  • Recursive processing by noncausal digital filters

    Publication Year: 1982, Page(s):363 - 370
    Cited by:  Papers (29)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1176 KB)

    Digital filters having exactly linear phase are usually realized by nonrecursive systems. However, the filter degree, and thus the expense, becomes rather large in the case of steep filters with high attenuation in the stopband. This paper deals with an alternative possibility using noncausal recursive systems After known methods are generalized, suitable algorithms are proposed and systematic err... View full abstract»

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  • A module for acoustic-phonetic transcription of fluently spoken German speech

    Publication Year: 1982, Page(s):440 - 450
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1920 KB)

    This system is a module of a speech understanding system developed at our institute. After a low-pass filtering and sampling, the speech signal is divided into overlapping frames. These frames are classified into phonetic classes. With a set of rules, adjacent frames corresponding to a phone are combined into segments. The output is a string of segments containing several alternative phones, toget... View full abstract»

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  • Vector quantization of speech and speech-like waveforms

    Publication Year: 1982, Page(s):423 - 435
    Cited by:  Papers (54)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2696 KB)

    An algorithm for the design of vector quantizers that are locally optimum in the sense of minimizing an average quantitative distortion measure is used to design 1 and 2 bit/sample vector quantizers for both real sampled speech and a simulated speech-like auto-regressive random process. Both weighted and unweighted squared-error distortion measures are considered. Several comparisons are made and ... View full abstract»

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  • Implementation of 2-D digital filters by iterative methods

    Publication Year: 1982, Page(s):473 - 487
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2672 KB)

    A two-dimensional (2-D) rational filter can be implemented by an iterative computation involving only finite-extent impulse response (FIR) filtering operations, provided a certain convergence criterion is met. In this paper, we generalize this procedure so that the convergence criterion is satisfied for any stable 2-D rational transfer function. One formulation which guarantees convergence invokes... View full abstract»

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  • The bilinear transformation of two-dimensional state-space systems

    Publication Year: 1982, Page(s):500 - 502
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    Many authors have used the two-dimensional (2-D) bilinear transformation to obtain 2-D digital filters from stable 2-D analog filters. In this paper, a technique is proposed for performing the bilinear transformation on 2-D state-space systems. This technique is also applicable to multidimensional MIMO systems. Programming this algorithm is straightforward if there is access to computer subroutine... View full abstract»

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  • Least squares algorithms for adaptive linear-phase filtering

    Publication Year: 1982, Page(s):381 - 390
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1608 KB)

    In many applications, it is desirable to use filters with linear-phase characteristics. This paper presents an approach for developing such filters for adaptive signal processing. Several least squares algorithms are derived for adjusting the coefficients of an adaptive linear phase filter. It is shown that smoothing filters, rather than the commonly used prediction filters, are a more natural cho... View full abstract»

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  • Formant extraction algorithm in error

    Publication Year: 1982, Page(s): 520
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    In some rare cases, the formant extraction algorithm described by McCandless [1] fails by reversing the formant order. A correction is given. View full abstract»

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  • Correlation and spectral analysis of nonlinear transformations of sequency-band-limited signals

    Publication Year: 1982, Page(s):513 - 516
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    This note considers the representation of sequency-band-limited random signals in time, sequeney, and frequency domains. Computationally convenient expressions for correlation functions and associated (frequency) power spectral densities are derived via corresponding sequency sampling expansions. The approach of obtaining correlation and spectral density functions via sequency sampling expansions ... View full abstract»

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  • Digital image restoration using spatial interaction models

    Publication Year: 1982, Page(s):461 - 472
    Cited by:  Papers (62)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3080 KB)

    This paper is concerned with developing fast nonrecursive algorithms for the minimum mean-squared error restoration of degraded images. The degradation is assumed to be due to a space invariant, periodic, nonseparable known point-spread function, and additive white noise. Our basic approach is to represent the images by a class of spatial interaction models, namely the simultaneous autoregressve m... View full abstract»

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  • Delay estimation simulations and a normalized comparison of published results

    Publication Year: 1982, Page(s):508 - 511
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Three recent publications have reported delay-estimate variances from simulations using the generalized cross-correlator method on both stationary random signals with noise and deterministic signals with noise. Further simulations with finite energy signals are reported here. A method of comparing the three reported data sets is developed, and a remarkable consistency is observed even though the s... View full abstract»

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  • The design of specialized residue classes for efficient recursive digital filter realization

    Publication Year: 1982, Page(s):370 - 380
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1800 KB)

    The design of residue number system recursive digital filters requires scaling to prevent overflow. This paper presents special residue classes in which scaling is a simple operation that can be easily mechanized. This hierarchy of useful residue classes is described, and quantization error due to residue scaling is analyzed in each class. Computer simulations of a recursive Chebyshev band reject ... View full abstract»

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  • Fourfold rotational symmetry in two-dimensional functions

    Publication Year: 1982, Page(s):488 - 499
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2168 KB)

    The presence of various types of symmetry in the frequency responses of a two-dimensional filter function reflects as constraints on its coefficients. In this paper, such constraints are derived for two-dimensional analog and digital transfer functions so that the magnitude functions of the frequency responses of these transfer functions possess fourfold rotational symmetry. The relationship betwe... View full abstract»

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  • Voiced/Unvoiced/Mixed excitation classification of speech

    Publication Year: 1982, Page(s):451 - 460
    Cited by:  Papers (25)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2344 KB)

    Methods for performing voiced/unvoiced/mixed excitation classification of speech are explored. The decision-making process is viewed as a pattern recognition problem. Three aspects of the task are examined: classifier type, decision structure, and feature selection. A variety of different approaches are compared. A classifier is obtained which, in limited tests, achieves 95 percent classification ... View full abstract»

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  • Design of circularly symmetric 2-D FIR digital filters using Fourier reconstruction technique

    Publication Year: 1982, Page(s):505 - 508
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    Fourier reconstruction technique is found to be applicable to the design of circularly symmetric two-dimensional (2-D) FIR digital filters. The algorithm is simple, straightforward, and practical. An even size (2n × 2n) filter can also be designed easily. Comparisons are presented between the Fourier reconstruction method and other algorithms. View full abstract»

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  • A note on minimizing the prediction error when the zeros are restricted to the unit circle

    Publication Year: 1982, Page(s):503 - 505
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    It is shown that the problem of minimizing the prediction error under the constraint that the zeros of the predictor polynomial be on the unit circle can be solved by using a modification of the Levinson algorithm. Consequences of this result are discussed. View full abstract»

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  • Analyses and experiments on the DM into LPC tandem

    Publication Year: 1982, Page(s):436 - 439
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    Present plans for a defense communications digital voice network require both 16 kbit/s delta modulation (DM) and 2.4 kbit/s linear predictive coding (LPC). Unfortunately, when the output of a delta modulator receiver is used as the input to an LPC system, the speech synthesized by the LPC receiver is noticeably degraded. This paper investigates the use of sequential estimation algorithms to reduc... View full abstract»

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  • Seismic modeling in the domain of intercept time and ray parameter

    Publication Year: 1982, Page(s):406 - 423
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2688 KB)

    In recent years, seismic modeling has been based primarily on two methods: generalized ray theory and the reflectivity method. Variations within these methods are characterized by the domains of computation and the approximations applied. One common feature of both approaches is the straightforward translation of a mathematical solution of the wave equation into a computational algorithm, which de... View full abstract»

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  • Least squares type algorithm for adaptive implementation of Pisarenko's harmonic retrieval method

    Publication Year: 1982, Page(s):399 - 405
    Cited by:  Papers (80)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1312 KB)

    Pisarenko's harmonic retrieval method involves determining the minimum eigenvalue and the corresponding eigenvector of the covariance matrix of the observed random process. Recently, Thompson [9] suggested a constrained gradient search procedure for obtaining an adaptive version of Pisarenko's method, and his simulations have verified that the frequency estimates provided by his procedure were unb... View full abstract»

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  • Fast algorithm for identification of an ARX model and its order determination

    Publication Year: 1982, Page(s):390 - 399
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1760 KB)

    In this paper, we present a fast algorithm for fitting ARX models and determining their orders from the covariance and cross-covariance information of input and output processes. Ascending and descending order-update recurrences will be presented first for fitting an ARX model. These recurrences will be applied to the order determination of ARX models based on Akaike's information criterion. This ... 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