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IEEE Transactions on Audio and Electroacoustics

Issue 2 • Date June 1970

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Displaying Results 1 - 20 of 20
  • [Front cover and table of contents]

    Publication Year: 1970, Page(s): 0
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    Freely Available from IEEE
  • Editorial

    Publication Year: 1970, Page(s):81 - 82
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1970, Page(s): c4
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    Freely Available from IEEE
  • An approach to the approximation problem for nonrecursive digital filters

    Publication Year: 1970, Page(s):83 - 106
    Cited by:  Papers (72)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2208 KB)

    A direct design procedure for nonrecursive digital filters, based primarily on the frequency-response characteristic of the desired filters, is presented. An optimization technique is used to minimize the maximum deviation of the synthesized filter from the ideal filter over some frequence range. Using this frequency-sampling technique, a wide variety of low-pass and bandpass filters have been des... View full abstract»

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  • Adaptive digital filters for equalization of telephone channels

    Publication Year: 1970, Page(s):195 - 200
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    An application of digital filtering to communication over a channel having amplitude and phase distortion in the frequency band occupied by the transmitted signal is presented. Described are a nonrecursive and a recursive digital filter which can serve as adaptive equalizers in compensating for the amplitude and phase distortion caused by the channel. The filter coefficients are adjusted automatic... View full abstract»

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  • Nonrecursive digital filtering using cascade fast Fourier transformers

    Publication Year: 1970, Page(s):177 - 183
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The organization of a special-purpose digital processor for performing nonrecursive digital filtering is described. The processor uses two complementary cascade fast Fourier transformers. Each transformer can simultaneously transform two independent data blocks of length N words using \log _{2} N arithmetic units and View full abstract»

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  • The design of wide-band recursive and nonrecursive digital differentiators

    Publication Year: 1970, Page(s):204 - 209
    Cited by:  Papers (51)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Designs for recursive and nonrecursive wide-band differentiators are presented. The coefficients for the recursive differentiators were optimally chosen to minimize a square-error criterion based on the magnitude of the frequency response. The coefficients for the nonrecursive differentiators were chosen using a frequency sampling technique. One or more of the coefficients were optimally selected ... View full abstract»

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  • Digital filtering via block recursion

    Publication Year: 1970, Page(s):169 - 176
    Cited by:  Papers (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    Digital filters which have poles in their transfer functions are usually implemented by various direct feedback arrangements. Such filters can also be synthesized in a form amenable to implementation via the FFT. The key feature of this procedure is block feedback through a special finite-response filter. Although the procedure appears to offer few immediate practical advantages, its asymptotic pr... View full abstract»

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  • Synthesis of recursive digital filters using the FFT

    Publication Year: 1970, Page(s):211 - 212
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    It has been shown that recursive digital filters can be synthesized using the fast Fourier transform. An algorithm for computer implementation has been developed and used in comparing the computation times and noise figures of filters synthesized in this manner with the computation times and noise figures of filters synthesized by recursion. A model has been proposed for analysis of noise in the t... View full abstract»

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  • Roundoff-noise analysis for fixed-point digital filters realized in cascade or parallel form

    Publication Year: 1970, Page(s):107 - 122
    Cited by:  Papers (119)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1360 KB)

    The roundoff-noise outputs from two transpose configurations, each for the cascade and parallel forms of a digital filter, are analyzed for the case of uncorrelated roundoff noise and fixed dynamic range. Corresponding transpose configurations are compared on the basis of the variance, or total average power, and the peak spectral density of the output roundoff noise. In addition to providing gene... View full abstract»

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  • IEEE Proposed standard for measurement of loudspeaker electrical impedance

    Publication Year: 1970, Page(s): 213
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (39 KB)

    First Page of the Article
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  • Time domain design of recursive digital filters

    Publication Year: 1970, Page(s):137 - 141
    Cited by:  Papers (90)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    The problem of synthesis of recursive digital filters to give a desired pulse response over a specified interval is studied. Realizability conditions are stated and a linear design method is developed. Several design procedures that require only linear calculations are given for approximate realization of recursive filters. Finally, an error analysis of the techniques is made. View full abstract»

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  • Audio frequency spectrum analysis using MOS memory elements

    Publication Year: 1970, Page(s):201 - 203
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The speed of present-day logic elements is such that it is possible to effect real-time spectrum analysis of audio frequency signals by means of digital hardware. This paper describes a structure that computes the discrete Fourier transform of a 400-point time sequence in 10 ms. This allows the real-time analysis of signals having components in the range from dc to 5 kHz. A high-speed bipolar arit... View full abstract»

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  • Realization of digital filters using block-floating-point arithmetic

    Publication Year: 1970, Page(s):130 - 136
    Cited by:  Papers (47)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Recently, statistical models for the effects of roundoff noise in fixed-point and floating-point realizations of digital filters have been proposed and verified, and a comparison between these realizations presented. In this paper a structure for implementing digital filters using block-floating-point arithmetic is proposed and a statistical analysis of the effects of roundoff noise is carried out... View full abstract»

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  • An algorithm for the numerical spectral estimation of a band -limited continuous signal

    Publication Year: 1970, Page(s):210 - 211
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    First Page of the Article
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  • Designing simple, effective digital filters

    Publication Year: 1970, Page(s):142 - 158
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1472 KB)

    Models for a class of narrow-band digital filters and a class of wide-band digital filters are developed and analyzed The analysis forms a basis for a computer-aided design technique for such filters. Our aim is to show that useful performance can be achieved within the constraints of very simple realizations. View full abstract»

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  • FFT organizations for high-speed digital filtering

    Publication Year: 1970, Page(s):159 - 168
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    The subject of this paper concerns the analysis of high-radix FFT algorithms appropriate to hardware implementation of nonrecursive filters and the error propagation properties associated with these algorithms. Variations in the structure of high-radix fast Fourier transforms are illustrated by means of their Kronecker product expansions. The implications in hardware design of the different struct... View full abstract»

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  • Pulse-transfer-function identification using discrete orthonormal sequences

    Publication Year: 1970, Page(s):184 - 187
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    A method for estimating the pulse-transfer function of a linear time-invariant sampled-data system from on-line input and output records is presented. The impulse response of the system is approximated by a finite linear combination of a set of discrete orthonormal sequences. These sequences can be generated by a chain of digital filters. The method is based on the fact that the system output at a... View full abstract»

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  • A special-purpose online processor for bandpass analysis

    Publication Year: 1970, Page(s):188 - 194
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    The design of a special-purpose on-line processor for bandpass analysis with application to spectral estimation is described. The processor utilizes a digital filtering procedure based on the frequency shift of the sampled signal spectrum. A peculiarity of the processor is that it performs a bandpass analysis by using a unique set of digital filter coefficients for all the analyzed bands. A small ... View full abstract»

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  • Computer-aided design of recursive digital filters

    Publication Year: 1970, Page(s):123 - 129
    Cited by:  Papers (107)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A practical method is described for designing recursive digital filters with arbitrary, prescribed magnitude characteristics. The method uses the Fletcher-Powell optimization algorithm to minimize a square-error criterion in the frequency domain. A strategy is described whereby stability and minimum-phase constraints are observed, while still using the unconstrained optimization algorithm. The cas... View full abstract»

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Aims & Scope

This Transactions ceased production in 1973. The current retitled publication is IEEE Transactions on Signal Processing.

Full Aims & Scope