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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 5 • October 1974

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Displaying Results 1 - 16 of 16
  • [Front cover and table of contents]

    Publication Year: 1974, Page(s): 0
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    Freely Available from IEEE
  • Comments on "An analysis of design conditions for a phase-inverter speaker system with a drone cone"

    Publication Year: 1974, Page(s):389 - 391
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The last sentence on p. 405 in the above paper states: "This paper ... shows that the low-frequency response of the drone-cone system is a little inferior to that of the bass-reflex system, ... ." The exposition of this correspondence shows that a properly designed drone cone for a phase-inverter loudspeaker will provide performance superior to that of the same loudspeaker with a port. View full abstract»

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  • [Back cover]

    Publication Year: 1974, Page(s): c4
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    Freely Available from IEEE
  • A parametrically controlled spectral analysis system for speech

    Publication Year: 1974, Page(s):362 - 381
    Cited by:  Papers (30)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2320 KB)

    The parametrically controlled analyzer (PCA) is a large PL/I program which has been designed to perform spectral analysis of speech signals. PCA features parametric selection of several analysis methods, including discrete Fourier transformation and linear predictive coding. Also, selection may be made among various smoothing, normalization, and interpolation methods. PCA develops high-quality spe... View full abstract»

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  • Average magnitude difference function pitch extractor

    Publication Year: 1974, Page(s):353 - 362
    Cited by:  Papers (233)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    This paper describes a method for using the average magnitude difference function (AMDF) and associated decision logic to estimate the pitch period of voiced speech sounds. The AMDF is a variation on autocorrelation analysis where, instead of correlating the input speech at various delays (where multiplications and summations are formed at each value of delay), a difference signal is formed betwee... View full abstract»

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  • A multiline computer voice response system utilizing ADPCM coded speech

    Publication Year: 1974, Page(s):339 - 352
    Cited by:  Papers (14)  |  Patents (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1688 KB)

    In this paper we discuss the issues involved in implementing an automatic computer voice response system which is capable of serving up to ten independent output channels in real time. The system has been implemented on a Data General NOVA- 800 minicomputer. Individual isolated words and phrases are coded at a rate of 24 000 bits/s using a hardware adaptive, differential pulse-code modulation (ADP... View full abstract»

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  • The optimum comb method of pitch period analysis of continuous digitized speech

    Publication Year: 1974, Page(s):330 - 338
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    A new method of tracking the fundamental frequency of voiced speech is described. The method is shown to be of similar accuracy as the Cepstrum technique. Since the method involves only additions, no multiplication, it is shown to be faster than the SIFT algorithm. The basis of the method is searching for a minimum in the magnitude of the difference between a speech segment and a delayed speech se... View full abstract»

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  • A simple method of computing the input quantization and multiplication roundoff errors in a digital filter

    Publication Year: 1974, Page(s):326 - 329
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A simple method of calculating the steady-state value of the variance of the output noise of a digital filter due to the input quantization noise or internally generated noise from product round-off is presented. The output noise is expressed as a sum of simpler terms belonging to one of four basic groups. Explicit expressions have been developed for rapid evaluation of these terms in the expansio... View full abstract»

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  • The representation of two-dimensional sequences as one-dimensional sequences

    Publication Year: 1974, Page(s):320 - 325
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    A number of signal processing techniques which have been developed for processing one-dimensional sequences do not generalize to the processing of two-dimensional signals, largely due to the absence of a two-dimensional factorization theorem. In an attempt to circumvent this problem, a specific representation of two-dimensional sequences as one-dimensional sequences is presented in this paper. Usi... View full abstract»

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  • Joint density functions for digital spectra

    Publication Year: 1974, Page(s):314 - 320
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    An analysis is presented for the joint probability density functions of power spectra of random processes computed under various conditions of data/frequency smoothing. Spectral correlation functions are determined which illustrate the effect of smoothing on adjacent spectral ordinates. The technique of segment averaging of spectra is explored and bivariate probability density functions establishe... View full abstract»

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  • Algorithm for stability test of multidimensional filters

    Publication Year: 1974, Page(s):307 - 314
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    An algorithm with a view towards computer implementation is given for stability test of filters of arbitrary dimension and complexity. The algorithm is based on the generation of a number of multivariable polynomials, reduction of each of these into several single variable polynomials by a finite number of rational operations, and a scheme of repeated single variable polynomial factorizations and ... View full abstract»

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  • An algorithm for performing an inverse chirp z-transform

    Publication Year: 1974, Page(s):387 - 388
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    An efficient algorithm for the determination of the coefficients of a polynomial from evenly spaced sample values of that polynomial on a spiral contour in the complex plane is presented. It is useful for the determination of a sequence from evenly spaced values of its Fourier transform. View full abstract»

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  • A simplified design procedure for cascade form low-pass digital filters

    Publication Year: 1974, Page(s):381 - 383
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A technique is presented for the design of cascade form recursive low-pass digital filters which can assist in minimizing the number of coefficient bits. Simple constraints on the pole positions due to filter coefficient quantization allow intuitive adjustments of pole positions to arrive at a desired frequency response function. View full abstract»

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  • Extension of a radix-2 fast Fourier transform (FFT) program to include a prime factor

    Publication Year: 1974, Page(s):388 - 389
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A simple procedure is presented to develop a fast Fourier transform (FFT) program for PQ points starting from a program for Q points, with emphasis on Q = 2M. The transformation with respect to the factor P is followed by a transformation of P groups of Q points each using the existing subroutine, then the array is unscrambled with respect to P. View full abstract»

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  • On sensitivity and roundoff noise in wave digital filters

    Publication Year: 1974, Page(s):383 - 384
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    In a wave digital (WD) filter, attenuation, and thus attenuation sensitivity, can be defined in two different ways. The first type of sensitivity is of importance from the point of view of attenuation distortion and can easily be kept small. The second, which differs from the first at most by an additive constant, is important from the point of view of roundoff noise. Structures are discussed for ... View full abstract»

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  • Two-pass recursive digital filter with zero phase shift

    Publication Year: 1974, Page(s):384 - 387
    Cited by:  Papers (55)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A two-pass recursive scheme is proposed for realizing zero phase shift filters with arbitrary magnitude characteristics. The first pass is performed in forward time and the second in reverse time. The effect of initial and reverse time transients is discussed, and a scheme for quasi on-line adaptation 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