IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 5 • October 1986

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Displaying Results 1 - 25 of 46
  • [Front cover and table of contents]

    Publication Year: 1986, Page(s): 0
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    Freely Available from IEEE
  • Comments on "A general method of minimum cross-entropy spectral estimation"

    Publication Year: 1986, Page(s):1324 - 1326
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    In a recent correspondence Tzannes et al. [1] introduced a new form of minimum cross-entropy (MCE) spectral analysis based on the observation that normalized spectra and symmetric probability density functions (pdf's) are axiomatically indistinguishable. Thus, the form of the minimum cross-entropy posterior pdf can be used as a model for spectral estimation. In this correspondence we derive the sa... View full abstract»

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  • Corrections to "Results on nonrecursive digital filters with nonequidistant taps"

    Publication Year: 1986, Page(s): 1336
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    First Page of the Article
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  • An explanation to the limitation observed in the Kumaresan-Prony algorithm

    Publication Year: 1986, Page(s):1338 - 1340
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (319 KB)

    In this correspondence we explain the limitation of the Kumaresan-Prony algorithm observed in [2]. It is shown that the condition number of the matrix involved with the associated least-squares problem periodically degrades (condition number rightarrow infin) making the least-squares solution ill conditioned. This ill conditioning causes a degradation in the estimates obtained by the Ku... View full abstract»

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  • Radar data processing: Vol. I - Introduction and tracking

    Publication Year: 1986, Page(s):1350 - 1351
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (221 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1986, Page(s): c4
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    Freely Available from IEEE
  • A complex adaptive algorithm for IIR filtering

    Publication Year: 1986, Page(s):1342 - 1344
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    This correspondence generalizes the Gauss-Newton algorithm [1] for adaptive IIR filters to include complex coefficients. The resulting algorithm simultaneously updates the real and imaginary parts of the filter coefficients to minimize the average squared estimation error. It has application in frequency-domain adaptive IIR filtering [2] where the signals and filter coefficients are complex. View full abstract»

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  • A high-quality digital filterbank for speech recognition which runs in real time on a standard microprocessor

    Publication Year: 1986, Page(s):1064 - 1073
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1336 KB)

    Asynchronous digital filterbank or LPC output is widely used for high-quality research and commercial speech recognition applications. Special-purpose hardware is usually applied. In this paper, a decimation/DFT filterbank system is described which may be implemented in real time on a standard microprocessor. Key features of the approach are a dithering technique, which allows output sampling at a... View full abstract»

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  • ESPRIT--A subspace rotation approach to estimation of parameters of cisoids in noise

    Publication Year: 1986, Page(s):1340 - 1342
    Cited by:  Papers (505)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The application of a subspace invariance approach (ESPRIT) to the estimation of parameters (frequencies and powers) of cisoids in noise is described. ESPRIT exploits an underlying rotational invariance of signal subspaces spanned by two temporally displaced data sets. The new approach has several advantages including improved resolution over Pisarenko's technique for harmonic retrieval. View full abstract»

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  • Optimization of one-bit full adders embedded in regular structures

    Publication Year: 1986, Page(s):1289 - 1300
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1136 KB)

    We study the problem of optimizing the transistor sizes in the one-bit nMOS full adder either isolated or embedded in a regular array. A local optimization method that we call the critical-path optimization method is developed. In this method, two parameters at a time are changed along the critical path until a locally optimal choice of transistor sizes is found. The critical-path optimization met... View full abstract»

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  • Stochastic operator norms for two-parameter adaptive lattice filters

    Publication Year: 1986, Page(s):1162 - 1164
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Expressions are derived for bounds on average output power in lattice filters with unequal forward and backward reflection coefficients, such as arise in the adaptive least-squares lattice algorithms [3]. It is shown that under stationary, noisy conditions, these bounds will in general be larger than in the case of equal forward and backward reflection coefficients, as in the adaptive gradient lat... View full abstract»

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  • Some new aspects of filters for filter banks

    Publication Year: 1986, Page(s):1182 - 1200
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (976 KB)

    The present paper deals with the design of filters for use in filter banks, i.e., with certain constraints on their transition bands. The goal is to achieve a baseband frequency response of a back-to-back analysis/synthesis filter bank system that is ideally flat in magnitude and linear in phase. Using the proposed method, this is possible for conventional polyphase filter banks, single-sideband (... View full abstract»

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  • Regular-pulse excitation--A novel approach to effective and efficient multipulse coding of speech

    Publication Year: 1986, Page(s):1054 - 1063
    Cited by:  Papers (99)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    This paper describes an effective and efficient time domain speech encoding technique that has an appealing low complexity, and produces toll quality speech at rates below 16 kbits/s. The proposed coder uses linear predictive techniques to remove the short-time correlation in the speech signal. The remaining (residual) information is then modeled by a low bit rate reduced excitation sequence that,... View full abstract»

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  • Projection approach to bearing estimations

    Publication Year: 1986, Page(s):1347 - 1349
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Bearing estimations based on the projection approach are discussed. A method is presented which computes a projection matrix by using any M rows of the covariance matrix, where M is the number of radiation sources. This method requires considerably fewer computations than projection techniques using eigenvectors, especially when the number of array elements is much larger than the number of source... View full abstract»

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  • Adaptive comb filtering for harmonic signal enhancement

    Publication Year: 1986, Page(s):1124 - 1138
    Cited by:  Papers (173)  |  Patents (61)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB)

    A new algorithm is presented for adaptive comb filtering and parametric spectral estimation of harmonic signals with additive white noise. The algorithm is composed of two cascaded parts. The first estimates the fundamental frequency and enhances the harmonic component in the input, and the second estimates the harmonic amplitudes and phases. Performance analysis provides new results for the asymp... View full abstract»

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  • A modification of the Kumaresan-Tufts methods for estimating rational impulse responses

    Publication Year: 1986, Page(s):1336 - 1338
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    This correspondence presents a modification of the Kumaresan-Tufts algorithm for estimating the parameters of rational impulse responses in additive white noise. The modified algorithm uses the forward and backward predictors to select the signal poles, and then combines the two sets of poles to form the final estimates. The modified algorithm exhibits an improved robustness and a smaller bias in ... View full abstract»

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  • A ring array processor architecture for highly parallel dynamic time warping

    Publication Year: 1986, Page(s):1310 - 1318
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    A ring array architecture is studied on a hardware algorithm and a control scheme for dynamic time warping (DTW) processing, in order to achieve real-time speech recognition. For developing a practical DTW processor, the key factors are to reduce the number of processing elements (PE's) in the array architecture and to maintain highly efficient concurrency and high throughput. Regular data and con... View full abstract»

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  • Image reconstruction from zero crossings

    Publication Year: 1986, Page(s):1269 - 1277
    Cited by:  Papers (47)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1360 KB)

    This study is concerned with the information in zero crossings (ZC) of images. Logan's conditions, specifying when a one-dimensional signal may be recovered (within a multiplicative constant) from its ZC, are extended for various cases of two-dimensional signals. An algorithm is implemented in reconstruction of context-free band-pass images. It is also successfully applied in reconstruction of con... View full abstract»

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  • Analysis/Synthesis filter bank design based on time domain aliasing cancellation

    Publication Year: 1986, Page(s):1153 - 1161
    Cited by:  Papers (232)  |  Patents (133)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    A single-sideband analysis/synthesis system is proposed which provides perfect reconstruction of a signal from a set of critically sampled analysis signals. The technique is developed in terms of a weighted overlap-add method of analysis/synthesis and allows overlap between adjacent time windows. This implies that time domain aliasing is introduced in the analysis; however, this aliasing is cancel... View full abstract»

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  • Edge detection using the linear model

    Publication Year: 1986, Page(s):1221 - 1227
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (984 KB)

    An edge detector based on the linear model is developed which utilizes the generalized likelihood ratio for statistical hypothesis testing. The detector is invariant to multiplicative changes in the gray-scale values of the image. Hence, thresholding based histogram segmentation is not required. The performance of this detector is analytically and experimentally compared to that of a gradient oper... View full abstract»

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  • The design of uniformly and nonuniformly spaced pseudoquadrature mirror filters

    Publication Year: 1986, Page(s):1090 - 1096
    Cited by:  Papers (104)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    In the past, quadrature mirror filters (QMF's) have been used to derive both uniformly and nonuniformly spaced filterbanks. A pair of QMF's divides a signal into two equal bands which can be decimated at 2:1 and subsequently combined to reconstruct the original signal. In order to derive filterbanks with more than two bands, QMF's are combined in a binary tree structure. Pseudoquadrature mirror fi... View full abstract»

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  • Measurement of spectral correlation

    Publication Year: 1986, Page(s):1111 - 1123
    Cited by:  Papers (148)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1296 KB)

    Various methods for measurement/computation of spectral correlation functions for time series that exhibit cyclostationarity are described in a unifying theoretical framework. Some of these are amenable to digital hardware or software implementations, others are amenable to analog electrical or optical implementations, and other implementation types used for conventional spectral analysis are also... View full abstract»

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  • Modeling and identification of symmetric noncausal impulse responces

    Publication Year: 1986, Page(s):1171 - 1181
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1096 KB)

    Spectrally equivalent causal (SEC) models for single-input/single-output noncausal systems are derived with the objective of estimating the noncausal impulse response. Attention is restricted to symmetric, noncausal impulse responses, and the measurements of the system output are assumed to be noisy. It is shown that by using structured SEC models, either state-space or ARMA-plus-noise, consistent... View full abstract»

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  • Detection of wave reflectors and wave sources in the earth subsurface

    Publication Year: 1986, Page(s):1245 - 1257
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1088 KB)

    Event detection is a very important task in geophysics. It encompasses the detection of wave sources (earthquakes, subsurface explosions) and the detection of wave reflectors (interfaces between rock layers having different velocities and/or different densities). The latter application is very important in seismic oil prospecting. Seismic events release energy which propagates toward the earth sur... View full abstract»

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  • The poles of symmetric linear prediction models lie on the unit circle

    Publication Year: 1986, Page(s):1344 - 1346
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Symmetric linear prediction models have their poles on the unit circle. A simple proof of this result is presented. 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