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IEEE Transactions on Electromagnetic Compatibility

Issue 3 • Date Aug. 1971

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Displaying Results 1 - 25 of 51
  • Table of contents

    Publication Year: 1971, Page(s): c1
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  • IEEE Electromagnetic Compatibility Group

    Publication Year: 1971, Page(s): c2
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  • Editorial

    Publication Year: 1971, Page(s): 75
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  • Correspondence

    Publication Year: 1971, Page(s): 76
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  • Applications of Walsh Functions [advertisement]

    Publication Year: 1971, Page(s): i
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  • Publicity Committee

    Publication Year: 1971, Page(s):ii - iii
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  • [Advertisement]

    Publication Year: 1971, Page(s): iv
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  • Table of contents

    Publication Year: 1971, Page(s):v - vii
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  • Index to authors

    Publication Year: 1971, Page(s): viii
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  • Welcoming Remarks

    Publication Year: 1971, Page(s): ix
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  • Applications of Walsh Functions [advertisement]

    Publication Year: 1971, Page(s): 1
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  • Practical Techniques for Transform Data Compression/Image Coding

    Publication Year: 1971, Page(s):2 - 6
    Cited by:  Papers (3)
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  • Walsh Function Imagery Analysis

    Publication Year: 1971, Page(s):7 - 10
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1218 KB)

    This paper presents some new results on the subject of imagery analysis by transform methods. Two transform techniques are presented. The first is the Hadamard-Walsh transform and the second is an eigenvector expansion technique. Experimental results are shown in terms of the degree of imagery data compression that can be obtained for each method. Results are also presented from a simulation exper... View full abstract»

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  • Orthogonal Transform Coding System for Television Signals

    Publication Year: 1971, Page(s):11 - 17
    Cited by:  Papers (43)  |  Patents (1)
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    We discuss orthogonal transformation as a method to compress frequency bandwidth for TV signals. We indicate that the slant orthogonal transformation derived from Hadamard matrix is most advantageous for compression of TV signal bandwidth. Results of simulation show that unweighted Sp-p/Nq rms of approximately 32 dB was obtained with 2.5 bits per sample on picture showing human face. View full abstract»

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  • Walsh Orthogonal Functions in Geometrical Feature Extraction

    Publication Year: 1971, Page(s):18 - 25
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1103 KB)

    Walsh functions are used in designinq a feature extraction algorithm. The ¿axis-symmetry¿ property of the Walsh functions is used to decompose geometrical patterns. An axissymmetry (a.s.)-histogram is obtained from the Walsh spectrum of a pattern by adding the squares of the spectrm coefficients that correspond to a given a.s.-number ¿ and plotting these against ¿. Since Walsh transformation i... View full abstract»

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  • Walsh Functions in Image Processing, Feature Selection and Pattern Recognition

    Publication Year: 1971, Page(s):26 - 32
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2295 KB)

    Walsh functions have become quite useful in the applications of image processing and feature selection. Due to their inherent efficiency of implementation, (they are a subset of the Reed Muller Codes and Hadamard matrices), they have become popular for coding, enhancement and other signal processing tasks. This paper will briefly describe applications in some of these areas with emphasis on a corr... View full abstract»

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  • Walsh Functions, Hadamard Matrices and Data Compression

    Publication Year: 1971, Page(s):33 - 37
    Cited by:  Papers (1)
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  • Linear and Nonlinear Filtering in the Walsh Domain

    Publication Year: 1971, Page(s):38 - 42
    Cited by:  Papers (4)
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  • The Mutual Spectral Representation of Trigonometric Functions and Walsh Functions

    Publication Year: 1971, Page(s):43 - 46
    Cited by:  Papers (1)
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  • A Power Spectrum and Related Physical Interpretation for the Multi-Dimensional Bifore Transform

    Publication Year: 1971, Page(s):47 - 50
    Cited by:  Papers (1)
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  • Comments on Transformation of "Fourier" Power Spectra Into "Walsh" Power Spectra

    Publication Year: 1971, Page(s):51 - 54
    Cited by:  Papers (10)
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  • Spectral Modes of the Walsh-Hadamard Transform

    Publication Year: 1971, Page(s):55 - 59
    Cited by:  Papers (10)
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  • The Generalized Transform

    Publication Year: 1971, Page(s):60 - 67
    Cited by:  Papers (6)
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    Generalized transforms for decomposing a signal in terms of discrete orthogonal transformation are developed. General relationships for factoring the transform matrices into a product of sparse matrices are derived. Efficient algorithms for fast computation of these transforms is a consequence of these sparse matrices. The flow graphs and hence the sequence of computations are identical for all th... View full abstract»

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  • Walsh Functions and Gray Code

    Publication Year: 1971, Page(s):68 - 73
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (729 KB)

    Gray code is a natural way of ordering binary vectors in dyadic space, hence it appears frequently in connetion with Walsh functions. In Paley's definition of Walsh functions their sequencies are arranged in Gray code. Gray code also appears in a new Walsh function generation algorithm which obtains a function by locating all its sign changes. There are certain computational advantages in using Gr... View full abstract»

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  • Classification of Random Binary Sequences Using Walsh-Fourier Analysis

    Publication Year: 1971, Page(s):74 - 77
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (551 KB)

    The concept of a finite binary random sequence does not seem to be covered in the classical foundations of the theory of probability. Solomonoff, Kolmogorov and Chaitin have tried to include this case by considering the lengths of programs required to generate these sequences: a longer program implying more randomness. However this definition is difficult to apply. This paper presents a straightfo... View full abstract»

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Aims & Scope

IEEE Transactions on Electromagnetic Compatibility publishes original and significant contributions related to all disciplines of electromagnetic compatibility (EMC) and relevant methods to predict, assess and prevent electromagnetic interference (EMI) and increase device/product immunity.

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Meet Our Editors

Editor-in-Chief
Prof. Ing. Antonio Orlandi 
University of L'Aquila
Email: antonio.orlandi@univaq.it