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Wyszukujesz frazę "lossless system" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
2-D lossless FIR filter design using synthesis of the paraunitary transfer function matrix
Autorzy:
Wawryn, Krzysztof
Poczekajło, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/24988510.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
lossless system
paraunitary transfer function matrix
FIR filter
embedding method
Opis:
A synthesis method for designing two-dimensional lossless finite impulse response (FIR) filters for various digital signal processing tasks is proposed. The synthesis method is based on using a 2-D embedding approach to obtain the paraunitary transfer function matrix of the lossless FIR filter. The elements of the paraunitary transfer function matrix are the transfer function of a given lossy FIR structure and the transfer functions for its complementary structures. The embedding method is used to design complementary FIR filter structures for several known lossy FIR filters. The lossless FIR filter matrix obtained in this article has a size of 3 × 1 and satisfies the paraunitary conditions. The conditions are described by a set of nonlinear equations. A modified Newton method is used to solve this set of equations. The proposed design method is used to determine the lossless structures of two-dimensional FIR filters for various digital processing tasks.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2023, 33, 4; 673--686
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lossless transmission lines terminated by crystal oscillator circuit
Autorzy:
Angelov, Vasil G.
Powiązania:
https://bibliotekanauki.pl/articles/1065397.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Fixed point theorem
Kirchhoff’s law
Lossless transmission line
Mixed problem for hyperbolic system
Neutral equation
Periodic solution
Opis:
The present paper deals with ТЕМ propagation of waves along lossless transmission lines terminated by a crystal oscillator circuit. The crystal oscillator circuit generates nonlinear boundary conditions derived by the Kirchhoff’s law. Then the mixed problem for the hyperbolic transmission line system to an initial value problem for neutral system on the boundary is reduced. The main purpose of the present paper is to show an existence-uniqueness of a periodic solution of the neutral system. This is achieved by introducing a suitable operator acting on a space of periodic functions. Its fixed point is a periodic solution of the neutral system. The advantages of the presented method on numerical example are demonstrated. The solution can be obtained by successive approximations.
Źródło:
World Scientific News; 2019, 132; 65-83
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and comparison of symmetry based lossless and perceptually lossless algorithms for volumetric compression of medical images
Autorzy:
Chandrika, B. K.
Aparna, P.
Sumam, D. S.
Powiązania:
https://bibliotekanauki.pl/articles/333936.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
bilateral symmetry
human visual system
MRI image
CT image
just noticeable distortion
perceptually lossless compression
symetria dwustronna
obraz MRI
rezonans magnetyczny
obrazowanie metodą rezonansu magnetycznego
obraz CT
tomografia komputerowa
zniekształcenie
Opis:
Modern medical imaging techniques produce huge volume of data from stack of images generated in a single examination. To compress them several volumetric compression techniques have been proposed. Performance of these compression schemes can be improved further by considering the anatomical symmetry present in medical images and incorporating the characteristics of human visual system. In this paper a volumetric medical image compression algorithm is presented in which perceptual model is integrated with a symmetry based lossless scheme. Symmetry based lossless and perceptually lossless algorithms were evaluated on a set of three dimensional medical images. Experimental results show that symmetry based perceptually lossless coder gives an average of 8.47% improvement in bit per pixel without any perceivable degradation in visual quality against the lossless scheme.
Źródło:
Journal of Medical Informatics & Technologies; 2015, 24; 147-154
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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