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Includes the top 50 most frequently accessed documents for this publication according to the usage statistics for the month of

  • Beamforming: a versatile approach to spatial filtering

    Publication Year: 1988, Page(s):4 - 24
    Cited by:  Papers (1306)  |  Patents (159)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2456 KB)

    An overview of beamforming from a signal-processing perspective is provided, with an emphasis on recent research. Data-independent, statistically optimum, adaptive, and partially adaptive beamforming are discussed. Basic notation, terminology, and concepts are included. Several beamformer implementations are briefly described.<> View full abstract»

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  • An introduction to hidden Markov models

    Publication Year: 1986, Page(s):4 - 16
    Cited by:  Papers (1248)  |  Patents (97)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7561 KB)

    The basic theory of Markov chains has been known to mathematicians and engineers for close to 80 years, but it is only in the past decade that it has been applied explicitly to problems in speech processing. One of the major reasons why speech models, based on Markov chains, have not been developed until recently was the lack of a method for optimizing the parameters of the Markov model to match o... View full abstract»

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  • An introduction to computing with neural nets

    Publication Year: 1987, Page(s):4 - 22
    Cited by:  Papers (3731)  |  Patents (273)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (8358 KB)

    Artificial neural net models have been studied for many years in the hope of achieving human-like performance in the fields of speech and image recognition. These models are composed of many nonlinear computational elements operating in parallel and arranged in patterns reminiscent of biological neural nets. Computational elements or nodes are connected via weights that are typically adapted durin... View full abstract»

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  • Vector quantization

    Publication Year: 1984, Page(s):4 - 29
    Cited by:  Papers (1394)  |  Patents (106)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4155 KB)

    A vector quantizer is a system for mapping a sequence of continuous or discrete vectors into a digital sequence suitable for communication over or storage in a digital channel. The goal of such a system is data compression: to reduce the bit rate so as to minimize communication channel capacity or digital storage memory requirements while maintaining the necessary fidelity of the data. The mapping... View full abstract»

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  • Gauss and the history of the fast fourier transform

    Publication Year: 1984, Page(s):14 - 21
    Cited by:  Papers (55)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2279 KB)

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  • Applications of distributed arithmetic to digital signal processing: a tutorial review

    Publication Year: 1989, Page(s):4 - 19
    Cited by:  Papers (359)  |  Patents (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1321 KB)

    The history and fundamentals of distributed arithmetic (DA) are presented. Ways to increase the speed of DA multiplication are described. DA is applied to a biquadratic digital filter, providing an example of vector dot-product and vector-matrix-product mechanization. Applications to transformers and nonlinear and/or nonstationary processing with DA are discussed. It is seen that DA is a very effi... View full abstract»

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  • Adaptive IIR filtering

    Publication Year: 1989, Page(s):4 - 21
    Cited by:  Papers (332)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1732 KB)

    An overview is presented of several methods, filter structures, and recursive algorithms used in adaptive infinite-impulse response (IIR) filtering. Both the equation-error and output-error formulations are described, although the focus is on the adaptive algorithms and properties of the output-error configuration. These parameter-update algorithms have the same generic form, and they are based on... View full abstract»

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  • VLSI Array processors

    Publication Year: 1985, Page(s):4 - 22
    Cited by:  Papers (95)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4193 KB)

    High speed signal processing depends critically on parallel processor technology. In most applications, general-purpose parallel computers cannot offer satisfactory real-time processing speed due to severe system overhead. Therefore, for real-time digital signal processing (DSP) systems, special-purpose array processors have become the only appealing alternative. In designing or using such array P... View full abstract»

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  • Continuous speech recognition using hidden Markov models

    Publication Year: 1990, Page(s):26 - 41
    Cited by:  Papers (51)  |  Patents (57)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1905 KB)

    The use of hidden Markov models (HMMs) in continuous speech recognition is reviewed. Markov models are presented as a generalization of their predecessor technology, dynamic programming. A unified view is offered in which both linguistic decoding and acoustic matching are integrated into a single, optimal network search framework. Advances in recognition architectures are discussed. The fundamenta... View full abstract»

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  • Method for the determinination of the statistical values of observations concerning quantities subject to irregular fluctuations

    Publication Year: 1987, Page(s): 6
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (90 KB)

    Albert Einstein introduces the concepts of the autocorrelation and cross-correlation functions and proves that automatic instruments can be devised for their experimental determination. However, the main point of the paper is that he introduces the concept of a power spectrum (without the use of this term, which - like "correlation function" and "stationary"- do not appear until much later) and el... View full abstract»

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  • Echo cancellation algorithms

    Publication Year: 1984, Page(s):30 - 38
    Cited by:  Papers (29)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1503 KB)

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  • Radar signal processing

    Publication Year: 1985, Page(s):2 - 18
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (10474 KB)

    A review of recent developments in radar signal processing in the presence of clutter is presented, with particular reference to an air-traffic environment. Two different signal processing issues are considered. The first issue relates to the adaptive suppression of clutter (of unknown statistics) and consequent enhancement of the echo produced by a moving target (e.g., aircraft). Here, several ad... View full abstract»

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  • GRAPE: a CASE tool for digital signal parallel processing

    Publication Year: 1990, Page(s):32 - 43
    Cited by:  Papers (29)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1286 KB)

    The use of computer-aided software engineering (CASE) tools for stream-oriented real-time digital signal processing (DSP) applications is discussed. These applications are characterized by a continuous stream of data samples or a continuous stream of blocks of data samples arriving at the processing facility at time instances completely determined by the outside world. An overview of existing deve... View full abstract»

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  • The arithmetic Fourier transform

    Publication Year: 1988, Page(s):13 - 17
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    Preliminary results are presented on the VLSI design and implementation of a novel algorithm for accurate high-speed Fourier analysis and synthesis. The arithmetic Fourier transform (AFT) is based on the number-theoretic method of Mobius inversion. Its computations proceed in parallel, and the individual operations are very simple. Except for a small number of scalings in one state of the computat... View full abstract»

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  • Cochlear modeling

    Publication Year: 1985, Page(s):3 - 29
    Cited by:  Papers (52)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (13815 KB)

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  • Set membership identification in digital signal processing

    Publication Year: 1989, Page(s):4 - 20
    Cited by:  Papers (97)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1374 KB)

    Set membership (SM) identification refers to a class of techniques for estimating parameters of linear systems or signal models under a priori information that constrains the solutions to certain sets. When data do not help refine these membership sets, the effort of updating the parameter estimates at those points can be avoided. An intuitive development is given, first in one dimension and then ... View full abstract»

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  • The application of dynamic programming to connected speech recognition

    Publication Year: 1990, Page(s):6 - 25
    Cited by:  Papers (32)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2159 KB)

    Principles of dynamic programming and its application to discrete-utterance and connected-speech recognition are introduced and discussed. The deterministic form, used for template matching for connected speech, is described in detail, and a number of algorithms are examined. The Viterbi algorithm, which is a form of dynamic programming for a stochastic system, is briefly discussed.<> View full abstract»

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  • Signal processing via least squares error modeling

    Publication Year: 1990, Page(s):12 - 31
    Cited by:  Papers (63)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1814 KB)

    The signal model presently considered is composed of a linear combination of basis signals chosen to reflect the basic nature believed to characterize the data being modeled. The basis signals are dependent on a set of real parameters selected to ensure that the signal model best approximates the data in a least-square-error (LSE) sense. In the nonlinear programming algorithms presented for comput... View full abstract»

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  • Quadrature mirror filter banks, M-band extensions and perfect-reconstruction techniques

    Publication Year: 1987, Page(s):4 - 20
    Cited by:  Papers (235)  |  Patents (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2913 KB)

    In this paper, quadrature mirror filters (QMF) are reviewed. After a brief introduction to multirate building blocks, the two-band QMF bank is discussed. Various distortions caused by the structure, and methods to eliminate these distortions are outlined. Perfect-reconstruction structures for the two-band case are reviewed, and the results are extended to the case of arbitrary number of channels. ... View full abstract»

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  • Einstein's 1914 paper on the theory of irregularly fluctuating series of observations

    Publication Year: 1987, Page(s):7 - 11
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (562 KB)

    The author makes various observations on Albert Einstein's short note of 1914 ["Method for the determination of the statistical values of observations concerning quantities subject to irregular fluctuations," Arch. Sci. Phys. et Natur., 37, ser. 4, 254-56 (1914)] on methods of reducing fluctuating series of observations. He argues that it foreshadows the theory behind the Fast Fourier Transform (F... View full abstract»

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  • High-quality digital audio in the entertainment industry: An overview of achievements and challenges

    Publication Year: 1985, Page(s):2 - 25
    Cited by:  Papers (7)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4498 KB)

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  • DSP software integration by object-oriented programming: a case study of QuickSig

    Publication Year: 1990, Page(s):21 - 31
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1469 KB)

    An overview is presented of the object-oriented programming (OOP) methodology in general and the ways it may be applied to integrate digital signal processing (DSP) software. Examples are given to show how the approach is used to solve signal-processing problems in the QuickSig system. The most important existing OOP languages and programming environments are discussed and compared form the point ... View full abstract»

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  • What's new in electroacoustic transducers

    Publication Year: 1984, Page(s):3 - 13
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5855 KB)

    About 15 years ago, the science and technology of electroacoustic transducers appeared to be mature fields, with only minor additions and improvements on the horizon. In the meantime, however, a number of unexpected and significant new developments have taken place in this area of acoustics. As a result, electroacoustic transducers present themselves today in a very new and different fashion. Some... View full abstract»

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  • Householder transforms in signal processing

    Publication Year: 1988, Page(s):4 - 12
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3331 KB)

    The author explores Householder transforms and their applications in signal processing. He shows that these transforms can be viewed as mirror-image reflections of a data vector about any desired hyperplane. The virtue of reflections is that they are covariance invariant, that is, they preserve the covariance matrix of the data. One can construct a finite sequence of such reflections that maps a b... View full abstract»

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  • Speaker recognition

    Publication Year: 1986, Page(s):4 - 17
    Cited by:  Papers (49)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2153 KB)

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  • The Verhulst process

    Publication Year: 1988, Page(s):13 - 14
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    In 1845, P.F. Verhulst proposed that, for any given niche, there is a maximum population size, X, that can be supported and that as the population approaches this maximum size, the rate should decrease. If the maximum population size is taken as one, Verhulst postulated that the growth, rate r at time n should be proportional to (1-X/sub n/), i.e., r= lambda (1-X/sub n/) where lambda >0. The dynam... View full abstract»

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  • Signal processing for interference rejection in spread spectrum communications

    Publication Year: 1986, Page(s):18 - 31
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4815 KB)

    Spread spectrum communication systems use a transmission bandwidth that is typically much larger than that which is required to transmit the information. The advantage of using this excess bandwidth is that the system becomes less sensitive to many types of interference. To further aid the spread spectrum receiver in suppressing interference, various signal processing techniques can be employed. I... View full abstract»

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  • An inverse scattering framework for several problems in signal processing

    Publication Year: 1987, Page(s):6 - 20
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2565 KB)

    The aim of this paper is to show that a general inverse scattering formulation illuminates alternative, computationally efficient solution methods for several classes of signal processing problems. Inverse scattering problems arise in physics, transmission-line synthesis, geophysics and acoustics and in one class of formulations they require a procedure to determine the parameters of a layered wav... View full abstract»

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  • Computer vision: Signals, segments, and structures

    Publication Year: 1984, Page(s):11 - 18
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5051 KB)

    In a computer vision system, we are given one or more digitized images of a scene, and our goal is to construct a description of the scene in terms of known types of objects that appear in it. Thus computer vision deals with digital images, but the techniques it uses are quite different from those used in digital image processing. In this article we describe some of these techniques, and indicate ... View full abstract»

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  • Digital audio systems

    Publication Year: 1985, Page(s):45 - 67
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4898 KB)

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  • Interactive signal processing documents

    Publication Year: 1990, Page(s):8 - 20
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1270 KB)

    Recently it has become possible to combine a powerful mathematical program with a word processor and thus create interactive scientific documents. The important features of an interactive document are described, and it is shown why such a document helps make research and learning more efficient. A program called Mathematica is used to illustrate the points made. A review of tools for signal proces... View full abstract»

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  • Some modeling problems in reflection seismology

    Publication Year: 1986, Page(s):4 - 17
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4742 KB)

    Modeling of Physical systems can be decomposed into four subproblems: representation, measurement, estimation, and validation. This paper shows how this decomposition can be applied to the reflection seismology problems of inversion and deconvolution, and that reflection seismology is a very rich field for practitioners of parameter estimation, system identification, and signal processing. View full abstract»

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  • Introduction to Einstein's contribution to time-series analysis

    Publication Year: 1987, Page(s):4 - 5
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (205 KB)

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  • The unreasonable effectiveness of number theory in science and communication (1987 Rayleigh Lecture)

    Publication Year: 1988, Page(s):5 - 12
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1099 KB)

    A brief overview is given of the role of integers and integer relationships in the science. The effectiveness of discrete mathematics in physics, music, and communication (and its negation, cryptography) is examined. The discussion covers: numbers and musical scales; concert halls and quadratic residues; wave diffraction and primitive roots; forbidding property of Fermat primes; Euler totients and... View full abstract»

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  • Multiplier policies for digital signal processing

    Publication Year: 1990, Page(s):6 - 20
    Cited by:  Papers (56)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1089 KB)

    The successful design of digital signal processing (DSP) systems and subsystems is often predicated on realizing fast multiplication in digital hardware. This tutorial provides the reader with a broad perspective of this important field and the pedagogy needed to understand the basic principles of digital multiplication. Both conventional and nonconventional methods of implementing multiplication,... View full abstract»

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  • Fast adaptive filters: A geometrical approach

    Publication Year: 1986, Page(s):18 - 28
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1459 KB)

    This is a tutorial article on the application of geometrical vector space concepts for deriving the rapidly converging, reduced computation structures known as fast recursive least squares (RLS) adaptive filters. Since potential applications of fast RLS, such as speech coding [1] and echo, cancellation [2], have been previously examined in the ASSP Magazine, this article focuses instead on an intu... View full abstract»

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Aims & Scope

This Magazine ceased production in 1990. The current retitled publication is IEEE Signal Processing Magazine.

Full Aims & Scope