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Recognition of musical recordings
Masár, Igor ; Horka, Michal (referee) ; Sigmund, Milan (advisor)
This thesis analyzes the specific audio signal-music. It describes the basic methods of analysis of musical signals. The following are mentioned the most common music file formats and the possibility of cross transfer. There are explained terms of music theory, which are also present in this work. They are described and created three ways of detecting melody. It is selected optimal algorithm based on the successful detection of the reference melodies recordings. User interface is created in MATLAB GUI allows recognition of recordings. This interface is tested on few melodies.
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LPC Speech Coding
Zapletal, Ondřej ; Kyselý, František (referee) ; Rajmic, Pavel (advisor)
The contents of the thesis "LPC speech coding" are studies of this method of a parametric source coding, explanation of mathematical procedures that are used in it (linear prediction, autocorrelation, Levinson-Durbin algorithm, transfer to a form suitable for transmission, Chebyshev root searching polynomial method) and acquaintance with the signification and application of that method in real speech encoders. The task of the original project of this thesis is a description and simulation of a simple speech encoder based on LPC, which transforms a real speech signal into a bit flow, which contains all of the significant parameters for its backward reconstruction (LSF coefficients, pitch period, excitation level, voice detection - AMDF method). One part of this thesis is a discussion about currently used speech encoders.
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Spread spectrum modulator
Lejsková, Alena ; Kováč, Michal (referee) ; Maršálek, Roman (advisor)
This thesis deals with a method of spectrum-spreading of the data signals transmitted in the radio channel. There exist three different ways of spreading application, they uses pseudorandom sequences and also orthogonal sequences. In these systems we can find various kinds of modulations, one of them (Quadrature Phase Shift Keying) is shown at the end of the thesis. Spectrum spreading orthogonal multiplex OFDM is based on this method. The thesis wants to present the principle of the spectrum spreading method and the description of systems, transmitters and receivers that are using this method.
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Modern coding of speech signals using overcomplete models
Zapletal, Ondřej ; Průša, Zdeněk (referee) ; Rajmic, Pavel (advisor)
The theoretical contents of this thesis are studies of overcomplete models. Those are the models of signals, on which is set for their parametrization more variables, than it's necessary and consequently there's computed so-called sparse solution via iteration algorithms. A goal of this analysis is a selection just of the considerable (sparse) parameters. The theory is based on a linear algebra, vector spaces, bases and so-called frames. The task of the individual project of this thesis is a description and simulation of two speech coders: a classical coder based on linear predictive speech coding and a coder, that's making use of overcomplete stochastic ARMA processes models. A part of their realization is to simulate their decoders and a analyze their reconstruction quality. For their realization there is used MATLAB and an overcomplete models' library (toolbox frames).
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Computer analysis of sport matches
Židlík, Pavel ; Balík, Miroslav (referee) ; Atassi, Hicham (advisor)
This work deals with the possibility of a fast football match analysis from audio part of record with the possibility of implementation of some methods for other than football matches as well. The first intention was concentrated on detection of whiz of the soccer whistle that has specific frequency in its specter, which is out of common speech frequency. After detection harmonic frequency , the attention was focused on the definition of whiz meaning. Referee was helpful with the issue as he informed me about the number of whiz styles and provided me with referential samples for whiz classification. Neural network with back propagation was used for definition of whiz meaning. Another subject for detection of important moments of the match was concentration on the commentator’s basic tone. In case the commentator is really excited with the match, his basic speech tone automatically intensifies with every important action of the game. Analysis of commentator’s intensified basic speech tone was realized in this work too. Also the national hymns of teams playing against each other are a significant moment of the match. That is why detection of a hymn became another subject of analysis. Advantages of MFCC were used to obtain audio signal feature, from which 20 coefficients were gained. These were used as an entrance for classifier based on neural network with back propagation. For easy usage of these methods a graphic user interface with possibility of well-arranged look on gained results and also with possibility of replaying chosen section was created.
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Faktory ovlivňující trh spotřebitelských úvěrů v České republice
Horáková, Alexandra
Horáková, A. Factors affecting the consumer loan market in the Czech Republic. Diploma thesis. Brno: Mendel University in Brno, 2015. The aim of diploma thesis is to create an econometric model which would identify possible economic indicators influencing the volume of consumer loans in the Czech Republic. The literature review will thus be focused on the characterization of the consumer loans within the environment of the Czech Republic and description of basic concepts and legal regulations related to them. Characterization of banking and non-bank institutions will be provided as well. The practical part will be dedicated to construction of the econometric model dealing with the volume of consumer loans reliant on selected variables.
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GRETL – Software for econometric courses support
Jindrová, Věra ; Sekničková, Jana (advisor) ; Školuda, Václav (referee)
The bachelor thesis aims to create a comprehensible user's manual for econometric software GRETL in the Czech language. It begins with the introduction of software GRETL and then acquaints the reader with a range of possible uses of the software when working with data. Thesis briefly describes the main characteristics of the possible linear regression model, such as multicollinearity, autocorrelation and heteroscedasticity, including possible testing in the particular software and evaluation of specific tests. The key part deals with defining and specifying data for their subsequent analysis in the software, compilation of a model, estimates of parameters of an econometric model using the least squares method, the weighted least squares method and the generalized least squares method. Furthermore, the thesis deals with hypotheses testing and confidence interval estimations, and also shows how to create and edit graphs in GRETL and explains each menu item in detail. All steps are supported by a graphical supplement and specific examples.
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Testing of weak-form efficiency of the exchange market
Havel, Radek ; Veselá, Jitka (advisor) ; Kalivoda, František (referee)
The goal of my thesis is to verify the weak form of the efficiency of the exchange market. The paper results from the presumptions for efficient price movements on the financial markets. They are applied to the time series of exchange rates of five currency pairs. After definitions of testing methodology, the given exchange rates series are analysed with the help of correlation and autocorrelation test, runs test and a test based on technical analysis. The conclusion of the thesis anwers the question if the exchange rates movements are suitable with the efficient market hypothesis.
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Analýza spotřeby v ČR 1996 - 2008
Kyncl, Jan ; Tichý, Filip (advisor) ; Ráčková, Adéla (referee)
Práce se snaží vysvětlit spotřební závislosti v ČR pomocí známého tvaru makroekonomické keynesiánské spotřební funkce. V první části jsou shrnuty základní poznatky teorie lineárních regresních modelů a způsoby jejich odhadu. Dále teoretická stránka ekonomické, statistické a ekonometrické verifikace modelu. V druhé části jsou teoretické znalosti využity v praxi na reálných datech z národních účtů ČR. Je sestaven vhodný regresní model spotřeby a proveden jeho odhad a verifikace.
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Dynamické modely inflace
Sodoma, Jan ; Hušek, Roman (advisor) ; Lejnarová, Šárka (referee)
In the first part, inflation is desribed theoretically. This part is about cost-push inflation, demand-pull inflation, galloping inflation, hyperinflation, monetarist and keneynesian view on inflation, issues in measuring inflation, effects of inflation and controlling inflation. Second part is empiric research. Inflation is endogenous variable. Price of petrol natural95 and monetary aggregate M2 are delayed exogenous variables. Object of analyse are relations between these variables: Correlation coefficient, F-test, t-tests, multicollinearity, autocorrelation.
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