Bell System Technical Journal, 56: 8. October 1977 pp 1531-1547. Some Experiments in Adaptive and Predictive Hadamard Transform Coding of Pictures. (Netravali, A.N.; Presada, B.; Mounts, F.W.)

Topics: coding, transform, quantization, predictive, coefficients, picture, entropy, quantizer, hadamard,...

Journal of Research of the National Bureau of Standards

Topics: Fi scher inequality, Hadamard determinant theorem, permanent, positive definite hermitian matrix

Bell System Technical Journal, 49: 6. July-August 1970 pp 969-986. Some Mathematical Properties of a Scheme for Reducing the Bandwidth of Motion Pictures by Hadamard Smearing. (Berlekamp, E.R.)

Topics: hadamard, differential, affine, sgn, vectors, picture, components, vector, binary, nonzero, bell...

6
6.0

Nov 30, 2019
11/19

by
Sean O'Connor

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Dot product math for artificial neural networks. ReLU as a literal switch. Associative memory.

Topics: Dot product, neural, network, weighted sum, random projection, associative memory, walsh, hadamard,...

Photographie positive noir et blanc. 1 photographie. 19 x 25,5 cm, 34 x 46 cm (f.). Légende ms. : "de Tannenberg, Vessiot, Fesquet, Renaux, Houpin, Bouvet, Dereims, Grévy, Lefèvre J., Bieules, Rivals, Bonnel (? ou Roussel ? [non répertorié dans le Supplément historique]), Chassagny, Hadamard, Lemoine. Manquent Carré, Oudot, Richard, Chudeau, Constantin [et U. Génin]". Reproduction : Nég. 196 ; 1 tirage par l'Antenne graphique en 1994 (PHO D/1/2/6-reprod.). Lien vers la notice...

Topics: École normale supérieure (Paris - 1794-1985), Photographies, de Tannenberg, Vessiot, Fesquet,...

Source: ENS – PHO D/1/2/6

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14

Jul 9, 2020
07/20

by
Diego Lucio Rapoport-Campodonico

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In this third and last Part of this series, we introduce the Klein Bottle Logic and its digital codification. We present a codification of the four letters of DNA or RNA in terms of the four states of this logic, and further relate it to three subalphabets –introduced by Petoukhov and He- as three primal biochemical distinctions –in the sense of Spencer-Brown- of a HyperKlein Bottle. We present a topological-algebraic algorithm for the generation of genomes, which turn out to have a fractal...

Topics: bioinformatics, biocomputation, biophysics, blown-up systems, cognition, complexity, Hadamard...

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3.0

Aug 19, 2019
08/19

by
Sean O'Connor

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Fixed filter bank neural network. Replace the adjustable filters (weighted sums) in an artificial neural network with a transform such as the FFT or Walsh Hadamard transform (fixed filter bank.) Then replace the fixed nonlinear function with individually adjustable nonlinear functions. That is make the nonlinear functions adjustable by parameterizing them. This reduces the computational costs from O(n^2) operations per layer to O(nlog(n)) operations per layer.

Topics: Walsh, Hadamard, Neural, Network, Filter, Bank, FFT, artificial, intelligence, java

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71

Jan 16, 2014
01/14

by
N. Nagaraja Kumar, M. Sucharitha

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Encryption is one of the ways to ensure high security for real time applications. In advanced Encryption and data-hiding, Encryption is done only on primary part of image and remaining part is sent as a plain image for secure data communication .A channel provider without the knowledge of a cryptographic key and original content may tend to reduce the data amount due to the limited channel resource. After encoding and on compression of encrypted data into a down sampled sub image and several...

Topics: Encryption, Cryptographic key, Bit-streams, Hadamard transform

3
3.0

Mar 12, 2020
03/20

by
Sean O'Connor

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Fixed filter bank neural networked based on the Walsh Hadamard transform. Instead of using parameterized hard switching functions f(x)=a.x x>=0, f(x)=b.x x 1, f(x)=b.x x

Topics: Neural Network, Walsh, Hadamard, Transform, Fixed, Filter, Bank, Switch, Soft

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79

Dec 6, 2019
12/19

by
S. O'Connor

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Fixed Filter Bank Neural Networks and Associative Memory using Random Projections. ReLU as a literal switch.

Topics: Neural, Network, Random, Projection, Associative, Memory, ReLU, Switch, WHT, Walsh, Hadamard,...

From the bitsavers.org collection, a scanned-in computer-related document. mitre :: ESD Technical Reports :: ESD-TR-69-266 A New Method of Generating Gaussian Random Variables by Computer Sep69

Topics: random, hadamard, moments, uniform, variables, normal, gaussian, density, matrix, independent,...

R&D Report 1976-28 : Hadamard transformation: Assessment of bit-rate reduction methods. C.K.P. Clarke This report is concerned with the bit-rate reduction of signals produced by Walsh-Hadamard transformation of PCM television signals. The main characteristics of the transform signals are outlined and the methods of linear and non-linear coding used to reduce their bit rate are described. It was found that, with linear coding, a slightly higher bit rate is required to describe the transform...

Topics: transform, bits, coefficients, signal, coding, hadamard, errors, signals, impairment, sampling,...

Journal of Research of the National Bureau of Standards

Topics: Hadamard product, inversion, matrix inequality, partitioned matrix, positive semi-definite.

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26

Jul 9, 2020
07/20

by
Diego Lucio Rapoport-Campodonico & Jean-Claude Perez

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We present 1) a novel unified conception of science, cognition and phenomenology in terms of the Klein Bottle logophysics; 2) as a supradual creative agency based on self and hetero-reference and multistate logic associated to the non-orientable topologies of the Möbius strip and Klein Bottle surfaces; 3) related to the Golden ratio in several areas of biology (particularly genomics), cognition, perception, physics and music, and the multiple biochemical codes of life; 4) semiosis and...

Topics: Codes and Origin of Life, Semiosis, Torsion Geometries, Möbius strip and Klein Bottle,...

R&D Report 1974-13 : Walsh-Hadamard transformation of television pictures R. Walker, C.K.P. Clarke This report gives a summary of the basic theoretical background of Walsh-Hadamard transformation and describes a method by which the process may efficiently be carried out on real-time television signals. The use of such a transformer, augmented by signal measurements carried out in non-real time, is described. The use of the technique as a means of television bit-rate reduction is discussed.

Topics: transform, bits, transformer, transformation, matrix, inverse, walsh, hadamard, vector, input,...

From the bitsavers.org collection, a scanned-in computer-related document. stanford :: sail :: sailMemoAbstr 159-196 May73

Topics: recursive, program, semantic, computer, schemas, logic, conceptual, fixpoints, programs, transform,...

Journal of Research of the National Bureau of Standards

Topics: Determinant, expected value, Hadamard determinantal bound, uniform distribution

R&D Report 1975-26 : Hadamard transformation: Walsh spectral analysis of television signals. C.K.P. Clarke The characteristics of Walsh-Hadamard transformation systems are examined with a view to reducing the data rate of digital television signals. Transformed signals have been measured using several different transformation arrangements by means of a Walsh spectrum analyser, in which television signals are correlated with Walsh functions. It is found that a slightly higher data rate is...

Topics: sequency, transformation, coefficients, signal, signals, hadamard, transform, walsh, spectra,...

3
3.0

Nov 2, 2019
11/19

by
S. O'Connor

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Neural Networks and Associative Memory based on the intermediate calculations of the out-of-place Walsh Hadamard transform algorithm. Code: FreeBasic 1.07 Linux AMD64

Topic: Walsh Hadamard Transform Neural Network Associative Memory Intermediate Random Projection

Ocean acoustic tomography is particularly suited to observing mesoscale dynamic processes, which may not be adequately observed by more conventional methods. Ships and buoys are limited in their sampling rates by location and /or transit speed while the tomographic signal samples the current and temperature fields all along its path at the speed of sound. Variation in the travel time of the signal occurs due to inhomogeneity in either the sound speed or the current. The ocean's fluctuation can...

Topics: Acoustic Tomography, Fast Hadamard Transform, Maximal length sequences, Internal waves, Surface...

10
10.0

Jul 9, 2020
07/20

by
Diego Lucio Rapoport-Campodonico

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Development of a unified ontology and epistemology based on the Klein Bottle supradual logophysics, applied to biology of development, second and higher order cybernetics, nonlinear systems, foundations of mathematics, cognition, genomics, biophysics, morphogenesis, etc. In this first part of a series of articles we discuss the torsion geometry of biology, physics, cognition and perception. We discuss the relations with the non-linear morphomechanics of organisms and the integration of the...

Topics: bioinformatics, biocomputation, biophysics, blown-up systems, cognition, complexity, Hadamard...

R&D Report 1974-07 : Hadamard transformation: A real-time transformer for broadcast standard television R. Walker The requirements and design of a modular Walsh-Hadamard transformer for the real-time transformation of broadcast quality PCM television are discussed. Although the example given is for a transform size of 32 picture elements, the modular approach allows any size of transformer to be constructed, using similar units. This experimental transform system includes the means by which...

Topics: transform, transformer, data, hadamard, input, matrix, storage, output, walsh, inverse, broadcast...

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Hewlett-Packard Journal Vol. 23 No. 3 (1971-11)(Hewlett-Packard)

Topics: frequency, sampling, impedance, measurements, measurement, probe, circuit, mhz, computing, counter,...

8,387
8.4K

Jan 2, 2014
01/14

by
International Journal of Science and Research (IJSR)

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International Journal of Science and Research (IJSR) Volume 2 Issue 12 December 2013

Topics: Nanotechnology, building, steel construction, sustainability Mushroom, Irradiation, Functional...

Bell System Technical Journal, 58: 7. September 1979 pp 1673-1702. Transform Domain Motion Estimation. (Stuller, J.A.; Netravali, A.N.)

Topics: displacement, estimation, transform, iteration, algorithm, hadamard, convergence, error, block,...

Bell System Technical Journal, 57: 1. January 1978 pp 61-73. Level Reassignment: A Technique for Bit-Rate Reduction. (Prasada, B.; Mounts, F.W. ; Netravali, A.N.)

Topics: reassignment, entropy, level, quantization, levels, pel, visibility, quantizer, checkered,...

Photographie positive noir et blanc. 1 photographie. 19 x 25,5 cm, 30 x 48 cm (f.). Légende ms. : "Renaux, Bouvet, Fesquet, Carré, Génin (démissionnaire 1886), Rivals, Chudeau, Lefèvre, Dereims, Grévy, Vessiot, Houpin, Bieules, de Tannenberg, Lemoine, Constantin, Hadamard, Richard, Oudot, Chassagny". Reproduction : Nég. 174 ; 1 tirage par l'Antenne graphique en 1994 (PHO D/1/1/37-reprod.). Lien vers la notice Calames : http://www.calames.abes.fr/Pub/ms/Calames-201742512464111

Topics: École normale supérieure (Paris - 1794-1985), Photographies, Renaux, Bouvet, Fesquet, Carré,...

Source: ENS – PHO D/1/1/37

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4.0

Oct 2, 2020
10/20

by
Agaian, S. S

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227 pages : 25 cm

Topics: Hadamard matrices, Hadamard-mátrixok -- kombinatorika, Hadamard, Matrices d', Hadamard-Matrix,...

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46

Jan 16, 2015
01/15

by
Aloysius Vrandt

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Abstract. Let ||L|| > u be arbitrary. In [17], the main result was the description of Hadamard morphisms. We show that ^r <= l. Hence recent developments in differential graph theory [17] have raised the question of whether r != Xo. U. L. Kepler [17] improved upon the results of L. Brouwer by studying smoothly tangential subgroups.

Topics: Random variables, Abelian moduli, Monge random variables, Hadamard morphisms, Differential graph...

Travel time of an acoustic signal from transmitter to receiver provides a great deal of information about the ocean environment. Variations in the travel time of the signal may be caused by the changes in the sound speed along the path. Since sound speed is a function of pressure, temperature and salinity, measurement of this parameter in acoustic tomography provides a means to observe ocean fluctuations through the use of inverse techniques. The upcoming Heard Island Experiment will attempt to...

Topics: Ocean tomography, Underwater acoustics, Doppler radar, Hadamard matrices., Acoustic tomography,...

Developing secure and effective access-control systems requires person-identification technologies that are reliable and convenient. This paper presents a new approach for the human identification system, which is based on the finger-knuckle print biometrics. The system uses image statistics and Two- Dimensional Discrete Walsh Hadamard Transform domain coefficients for the feature extraction. Principal component analysis is specifically used for the input dimensionality reduction of the feature...

Topics: Biometrics, Finger-Knuckle, Neural Network, Multi Layer Perceptron (MLP), Discrete Walsh Hadamard...

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58

Aug 8, 2019
08/19

by
Mazʹi͡a, V. G

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xxv, 574 p. : 26 cm

Topics: Hadamard, Jacques, 1865-1963, Mathematicians -- France -- Biography, Mathematics -- France --...

Parallel implementations of Fast Fourier Transforms (FFTs) and other Fast transforms are represented using factored, partitioned matrices. the factored matrix description of a distributed FFT is introduced using a decimation-in-time (DIT) FFT algorithm suitable for implementation on a distributed parallel processor. The heart of the matrix representation of distributed fast transforms is the use of permutations of an NxN identity matrix to describe the required later-processor data transfers on...

Topics: Electrical and computer engineering, Fast Fourier transform, Fast Hartley Transform, Walsh-Hadamard...