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Quadrature Mirror Digital Filtr Banks with Sigma-delta Modulators
Vrána, Jaroslav ; Smékal, Zdeněk (advisor)
Dissertation thesis is focused on real digital signal processing by quadrature mirror digital filter banks. In the first part a dual channel quadrature mirror digital filter bank is described briefly. Mainly transfer functions for distorted subband signals are described. In the next part generalized sigma-delta modulator and its linear model are described. Subsequently the generalized sigma-delta modulator is used in decomposition part of quadrature mirror digital filter bank. Designed structure is analyzed. Two design method of transfer functions are designed for the structure on the basis of analysis results. The first method is suitable for hand-made design by intuitive distribution of zeros and poles. The second method is more suitable for computer design. It is iterative method based on correlation. Transfer functions for quadrature mirror digital filter bank with sigma-delta modulators design examples are also part of thesis. Application of designed structure of quadrature mirror digital filter bank can lead to bigger compression ration in lossy data compression.
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Light Maps in 3D Computer Graphics
Vrána, Jaroslav ; Přibyl, Jaroslav (referee) ; Venera, Jiří (advisor)
Bachelor´s thesis describes techniques that are used in virtual terrain creation. First part describes generating of the height maps and the textures, after that is shown the terrain rendering and texturing. And next that is described the light maps generating. I show tree algorithms for the light maps generating, two for the terrain a one for the water. At the end I describe extension for the acceleration of the scene.
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Values in adolescents with behavioral disorders
Vrána, Jaroslav ; Hradilová, Tereza (referee)
This rigorous thesis' topic is the hierarchy of values in adolescents with behavioral disorders. The thesis is divided into a theoretical part, containing four chapters, and a research part comprising two chapters. The first chapter of the theoretical part explains the origins of special education, its development and benefits, its historical stages, as well as behavioral disorders in general. The second chapter focuses on behavioral disorders in childhood and adolescence, their classification, causes, diagnostic criteria, prevention and remedies. The third chapter discusses values and value orientation, their classification, organisation and division. It also includes attitudes, persuasion and preferences of values in adolescents. The last chapter of the theoretical part is dedicated to personality and its components, the developmental periods of pubescence and adolescence, and the importance of family for growing children. The empirical, or research, part's purpose is to uncover which values are held by adolescents with behavioral disorders. Based on that, partial goals were set to discover possible differences in value hierarchy in adolescents with and without behavioral disorders, further based on their age and gender. Quantitative research strategy method was used in this part of the thesis,...
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Light Maps in 3D Computer Graphics
Vrána, Jaroslav ; Přibyl, Jaroslav (referee) ; Venera, Jiří (advisor)
Bachelor´s thesis describes techniques that are used in virtual terrain creation. First part describes generating of the height maps and the textures, after that is shown the terrain rendering and texturing. And next that is described the light maps generating. I show tree algorithms for the light maps generating, two for the terrain a one for the water. At the end I describe extension for the acceleration of the scene.
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Quadrature Mirror Digital Filtr Banks with Sigma-delta Modulators
Vrána, Jaroslav ; Smékal, Zdeněk (advisor)
Dissertation thesis is focused on real digital signal processing by quadrature mirror digital filter banks. In the first part a dual channel quadrature mirror digital filter bank is described briefly. Mainly transfer functions for distorted subband signals are described. In the next part generalized sigma-delta modulator and its linear model are described. Subsequently the generalized sigma-delta modulator is used in decomposition part of quadrature mirror digital filter bank. Designed structure is analyzed. Two design method of transfer functions are designed for the structure on the basis of analysis results. The first method is suitable for hand-made design by intuitive distribution of zeros and poles. The second method is more suitable for computer design. It is iterative method based on correlation. Transfer functions for quadrature mirror digital filter bank with sigma-delta modulators design examples are also part of thesis. Application of designed structure of quadrature mirror digital filter bank can lead to bigger compression ration in lossy data compression.
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