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Image watermarking
Štágl, Luboš ; Zezula, Radek (referee) ; Číka, Petr (advisor)
This diploma thesis is concerned in static pictures Security problems. That means, additional informations (watermark) are embedded to the original picture in a specific way. This complex picture structure (watermark) should be unremoval by different attacks runing processes. The main goal of this diploma thesis is realize two separated methods digital data watermarking in MATLAB program. For reason of a quite large scale of different watermarking methods are chosen at this time only two of take were choosen. First of the methods is Watermark injection in the spatial domain and the second in the freuquency domain. Both methods are set up in a special way and finish goals of the process. Expected result are, that digital picture user doesn't know about the watermarking technique was aplied on this picture and the watermarking data are the most resistant as possible as can be. These attacks were simulated in Checkmark program.
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Comparison of success rate of multi-channel methods of speech signal separation
Přikryl, Petr ; Zezula, Radek (referee) ; Míča, Ivan (advisor)
The separation of independent sources from mixed observed data is a fundamental problem in many practical situations. A typical example is speech recordings made in an acoustic environment in the presence of background noise or other speakers. Problems of signal separation are explored by a group of methods called Blind Source Separation. Blind Source Separation (BSS) consists on estimating a set of N unknown sources from P observations resulting from the mixture of these sources and unknown background. Some existing solutions for instantaneous mixtures are reviewed and in Matlab implemented , i.e Independent Componnent Analysis (ICA) and Time-Frequency Analysis (TF). The acoustic signals recorded in real environment are not instantaneous, but convolutive mixtures. In this case, an ICA algorithm for separation of convolutive mixtures in frequency domain is introduced and in Matlab implemented. This diploma thesis examines the useability and comparisn of proposed separation algorithms.
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Marketing strategy for Fit Center
Zezula, Radek ; Snopek, Radek (referee) ; Mallya, Thaddeus (advisor)
This bachelor work focuses on analyzing limitations of marketing strategy of a fitness center. It tries to establish how these shortcomings could be eliminated and in achieving this goal different tools like marketing mix analysis and questionnaire are used. Based on the feedbacks from the customers who filled the questionnaire and discussion with the management of the center, some measures on how to properly react to each individual customer demand and increase attendance and popularity of fitness center were suggested.
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Marketing Communication Proposal for Hostel Služby Blansko, Ltd.
Zezula, Radek ; Snopek, Radek (referee) ; Šimberová, Iveta (advisor)
This diploma thesis focuses on analyzing limitations of marketing communication of Služby Blansko, Ltd. It tries to establish how these shortcomings could be eliminated and in achieving these goal different tools like marketing mix analysis is used. Based on the feedbacks from the customers and discussion with the management of the company, some measures on how to properly react to each individual customer demand and increase attendance and popularity of Služby Blansko, Ltd. were suggested.
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VST Plug-IN for audio signal watermarking
Henzl, David ; Schimmel, Jiří (referee) ; Zezula, Radek (advisor)
This thesis deal with digital signal proccessing methods, possibilities their processing and especially audio signal watermarking like possibility safeguard author's rights of audio content. In this thesis are foreshadoweds basic audio watermarking methods and possibilities of watermark detection. To idea generation about watermarking there is described audio watermarking method known as Echo Hiding. This method embed watermarks to audio content in time-domain while watermark detection is made in kepstral-domain by using Fast Fourier Transform and correlation function. Method is implemented like VST plug - in and along with ASIO drivers that minimize signal latency provides audio signal watermarking in real - time. Aim of the first volume of this thesis is introduction of VST technology, ASIO driver and creating VST plug – in‘s. Alternative volume of thesis deal with implementation watermarking methods in conjunction with VST technology.
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Neural networks in audio signal watermarking algorithms
Kaňa, Ondřej ; Smékal, Zdeněk (referee) ; Zezula, Radek (advisor)
Digital watermarking is a technique for digital multimedia copyright protection. The robustness and the imperceptibility are the main requirements of the watermark. This thesis deals with watermarking audio signals using artificial neural networks. There is described audio watermarking method in the DCT domain. Method is based on human psychoacoustic model and the techniques of neural networks.
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MHP application for remote control of actuating unit
Šot, František ; Zezula, Radek (referee) ; Kohoutek, Michal (advisor)
The aim of bachelor´s theses is reading up of general and transmitting string structure of digital video broadcasting terrestrial (DVB-T). Read up a possibilities of IRT- playout server and DVB-T modulator, further apprise of thermoregulation system ETATHERM and consequential creation of MHP application for system regulation. Thermoregulation system ETATHERM is possible to control by remote access, which means in our case by e-mail client. This system contains control unit ETH1 mod, KomWin program, Imodul program and regulation head of heating engineering. Created platform of home multimedia device (MHP application) is user interface, which communicate by simple mail transfer protocol (protocol for sending electronic mail) with thermoregulation system ETATHERM by remote access, User interface enables to set different characteristics of regulation such as room, temperature, time of the start and time of the end. The application is testing in simulation IRT MHP RI program and on set-top box DVB Strong 5510. By the help of application we create regulation command, which is possible to send to predefined e-mail, where it is worked up by Imodul program, which supplies receiving, confirming, cancelling and deleting regulation commands. Further it is worked up by KomWin program, which is linked to control unit ETH1 mod and this control unit starts configured regulation procedure. The application is create in Java code in development environment NetBeans 5.5.1.
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I2C-RS232 converter
Bednařík, Martin ; Zezula, Radek (referee) ; Zeman, Václav (advisor)
The objective of this thesis is to get familiar with function of I2C bus and microcontrollers AVR and study the principle of connecting microcontroller with the other circuits via this bus. Another goal is to design a device which will enable a communication between personal computer and controlled circuits. A part of this project is production of necessary microcontroller software equipment and to develop own communication protocol. Another output of this project is getting an overview of applied technologies, study possibili-ties of their additional usage and potential enlargement of device with another components.
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Using masking effects for audio data watermarking
Kabourek, Jiří ; Schimmel, Jiří (referee) ; Zezula, Radek (advisor)
In this work is presented technique for embedding digital watermark in digital audio signals. Digital watermark must be imperceptible and should be robust against attacks and other types of distortion. Algorithm is implemented for embedding digital watermark using technique spread-spectrum and psychoacoustic model ISO-MPEG I layer I. Robustness was tested for filtering signal, MP3 compression and resample method.
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