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Multiplatform Application for Speaker Verification
Görig, Jan ; Matějka, Pavel (referee) ; Glembek, Ondřej (advisor)
Bachelor thesis considers speaker recognition without knowledge of spoken message. There are described current feature extraction methods and their evaluation using Gaussian mixture model. The practical output of this work is application for visualization of the recognition process. Developed application is cross platform and it uses Qt and BSAPI libraries.
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Objective Exercise of a New Transmission Equipment
Rosenberg, Michal ; Polívka, Michal (referee) ; Škorpil, Vladislav (advisor)
The aim of my project is designing of the example of the new transmission equipment PCM30U - 3UST for education of the subject Access and transport networks in form of the three new laboratory tasks. The tasks are focused on the configuration of a more universal familiarity with transmission facilities-PCM30U-3UST. Students learn to operate with the equipment so that they will be able to manage its interface and practical usage of its insertable cards. Further they gain theoretical knowledge of the E1, that they verify it through the analyzer PUMA 4300E. This work is also acquainted them with the theoretical principles of signal transduction through the framework of the E1 and contains a brief manual of the transmission equipment PCM30U-3UST and analyzer PUMA 4300. Laboratory tasks are processed including detailed workflow, which includes graphic illustration of linkage and developed model protocols.
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Converters controling
Nevoral, Jiří ; Steinbauer, Miloslav (referee) ; Fiala, Pavel (advisor)
Bachelor´s project is study of DSP microprocessor problems to converters controlling with asynchronous motors and execution of a project. Study includes information on quality single type processor, benefits and disadvantage whole solving. Of purpose is DSP converters control with DMC1500.
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Special application of VoIP
Lembard, Tomáš ; Šebesta, Jan (referee) ; Fuchs, Michal (advisor)
The aim of this master's thesis is suggestion and following realization of voice transmission over the local network equipment and a description of used circuits and solutions in terms of hardware and software. This thesis deals with digitization of low-frequency signals, the structure of IP and UDP protocols, implementation of TCP/IP stack cIPS
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Possibilities of connecting the Asterisk softswitch to the 4th generation PBX
Halamík, Zdeněk ; Krajsa, Ondřej (referee) ; Šilhavý, Pavel (advisor)
This master’s thesis dissertate the possibilities of the linkage between Asterisk softswitch and the 4th generation private branch exchange. This should create a new generation’s network, so-called NGN, by the convergence of existing telecommunication networks with an IP computer network. This master’s thesis is divided into several chapters. In introduction is described the evolution of the private branch exchanges as well as the principles of the voice digitizing, codecs and signaling commonly used in both TDM and VoIP networks. The main aim of this project is the configuration of Asterisk software exchange for connection with PBX Alcatel 4400 as well as public phone network PSTN. Another goal of this master’s thesis was the configuration of Alcatel PBX and diagnostics of CCS and CAS signaling on E1 interface. In conclusion there are summarized advantages of NGN networks and their utilization in the future.
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Study of passive stabilisation of building materials temperature
Šebek, Jan ; Pavlík,, Zbyšek (referee) ; Zmeškal, Oldřich (advisor)
The topic of presented master’s thesis was study of passive stabilization of building materials temperature. The main goal of this thesis was measuring and characterization of the thermal properties of building materials, which are used to PCM technology. PCM technology is based on utilization of latent heat of phase change. At the beginning of this thesis it was needed to define physical principle of phase change, then the most usable PCM chemicals (e.g. paraffin, Glauber’s salt, hexahydrate calcium chloride) and their basic physical properties (especially thermo-physical), background research of building materials with PCM and also the methods of thermo-physical properties measurement. It was also needed to characterize measured building materials and define theirs thermal parameters; because the values of thermal parameters of measured samples were compared to these values. In the experimental part of my thesis are measurements of material thermal analysis, which are methods, where the properties of materials are studied as they change with temperature. I had used to differential scanning calorimetry, transient pulse method and other methods, which are usable for thermo-physical properties measuring and characterization. I have been much interested in properties of measured material, which were specific heat capacity, temperature diffusivity, heat conductivity and phase change temperature (the melting point of PCM). At the end of my thesis the findings of all methods were finally summarized, compared and commented.
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Computational tool for design of heat storage tank filled with phase change material
Duška, Michal ; Hrubý, Jan
The report presents an outcome of a contractual research carried out for JABLOTRON ALARMS a.s.. Mathematical models solving the problems defined by the contract as "Design calculation of heat storage tank filled with PCM encapsulated in approximately spherical capsules..." and "Design calculation of rod heating element in water tank with forced convection" (later changed on natural convection) are described in chapter 1. An implementation of the mathematical models into the Microsoft Excel spreadsheet with use of VBA is presented in chapter 2. The computational tools were handed over to the contractor on time. Alternative PCM for heat storage, especially materials based on paraffin waxes, and also additives to improve thermal conductivity and other properties are discussed in chapter 3.
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