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Subjective quality evaluation of video sequences
Krmela, Tomáš ; Fliegel, Karel (referee) ; Polák, Ladislav (advisor)
This master´s work is focused on the comparison of subjective assessment of the quality of video sequences. In this study, data are obtained by hardware and sofware techniques and they are compared. In the introduction, methods of video compressions are described. The main part of this work deals wtih the exploring of different methods of subjective assessment of the quality of video sequences. Finally, obtained results from different methods, are evaluated and discussed.
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RTL-SDR and its application in teaching of wireless communications
Dubina, Tomáš ; Polák, Ladislav (referee) ; Miloš, Jiří (advisor)
This bachelor thesis deals with the using of RTL-SDR dongle in wireless communication teaching. The first part discusses the SDR function and describes the properties of RTL-SDR. The second part deals with the communication chain and digital modulations. The last part describes the created mathematical model of the communication system and the concept of laboratory tasks. In the appendix there is one demonstration task suitable for teaching, including solutions.
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A Framework for generating Traffic in IoT Networks
Švehla, Ľubomír ; Staněk, Miroslav (referee) ; Polák, Ladislav (advisor)
The point of this master's thesis is to design a framework capable of receiving and processing and also generating and sending packets of BLE, Z-Wave and IQRF technologies. In addition to designing the software itself, it also deals with choosing suitable hardware. Selected hardware is SDR device HackRF~One. The software solution is implemented in C ++ and counts on the use of third-party tools.
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Measurement of quality and errors of digital video in MPEG-2 TS at DVB-T reception
Kadlček, Jiří ; Kratochvíl, Tomáš (referee) ; Polák, Ladislav (advisor)
This bachelor’s thesis describes structure of the transport stream MPEG-2 TS of the DVB-T standard and subjective and objective measuring methods of the video quality. The work also includes the description of the measurement devices and software Quality Analyzer R&S DVQ, measuring decoder ¸ DVMD, MPEG-2 Realtime Monitor, MPEG-2 Quality Monitor, which were used for the measuring the video quality and errors of the MPEG-2 TS in DVB-T. In the next part the work deals with the measurement and analysis of errors and quality of digital video stream in MPEG-2 TS. The obtained results from the measurement are presented in tables and graphically evaluated. In this work a twentyfour hour measurements of errors and quality of digital video stream in MPEG-2 TS were made. The obtained results from these measurements are evaluated and discussed. Finally, a new laboratoy work for the simultaneously measurement of the errors in video stream and video quality of the MPEG-2 TS stream was proposed.
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Coexistence of DVB-T2 and LTE in the 800 MHz band
Walach, Dominik ; Miloš, Jiří (referee) ; Polák, Ladislav (advisor)
This bachelor thesis deals with the study and evaluation of coexistence scenarios which can occur between DVB-T2 and LTE systems in the UHF band 800 MHz Both DVB-T2 and LTE systems are briefly described, and their common frequency bands are defined. An appropriate laboratory workplace is proposed and realized for the measurement, analysis and evaluation of the DVB-T2 and LTE coexistence scenarios. These systems work in adjacent or even in the same frequency bands. Thereby these systems can coexist, and different coexistence scenarios can occur.
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Laboratory workplace for measurement of DVB-T2 MISO broadcasting
Bárta, Vojtěch ; Kratochvíl, Tomáš (referee) ; Polák, Ladislav (advisor)
This bachelor thesis deals with measurement and analysis of DVB-T2 MISO broadcasts. The theoretical part of the thesis describes the broadcasting chain of the DVB-T2 system at the level of the physical layers. Attention is paid to both SISO and MISO transmit modes. In the experimental part of the work is to design a measuring workplace for monitoring and analysis of DVB-T2 MISO transmission in laboratory conditions. The functionality of the proposed concept and chosen measuring methodology was verified by a set of experimental measurements.
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Rotational 3D scanner
Švehla, Ľubomír ; Polák, Ladislav (referee) ; Kaller, Ondřej (advisor)
The point of this project is to design and construct a rotational 3D scanner. It is both about the hardware and software part. Low construction price is important factor in the hardware part and therefore the hardware part is really simple. Software part is solved by the FFmpeg tool and programming environment MATLAB. From the selected number of frames from the synchronized video the irradiated part is segmented. Consequently by compositing these traces a 3D model is gained. To gain a better result, the program uses two cameras. Program can be fully controlled from GUI.
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Simulation of the RF Transmission Channel for the DVB-H and DVB-SH
Hrach, Petr ; Fliegel, Karel (referee) ; Polák, Ladislav (advisor)
Project is focused on description DVB broadcasting for hand-held’s. It describes standard DVB-H that is founded on DVB-T and uses its transmission infrastructure. Standard DVB-SH is a hybrid system that adds to terrestrial broadcasting satellite connection. Signal can extend by various environments, therefore it are defined models transmission channel with defined parameters. Simulation of the transmission in both channel are realized in user application created in MATLAB. Finally, obtained results are evaluated and discussed.
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Embedded video processing for surveillance systems
Gerych, Lukáš ; Polák, Ladislav (referee) ; Frýza, Tomáš (advisor)
The thesis includes the design and implementation of embedded system to capture static scenes and image evaluation for the surveillance system. It is performed on a tiny computer Raspberry Pi with ARM processor. Methods are provided for various types of detection in the image and their implementation using OpenCV libraries. It also deals with ways to access the system for the control and viewing records of detections.
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Microphone cable tester
Vaněk, Pavel ; Kufa, Jan (referee) ; Polák, Ladislav (advisor)
This bachelor work deals with the electricial design and development of a handheld measuring device for microphone cables using time domain reflectometry method. The main aim of the work is to choose a suitable measuring method for locating faults on cables, develop electricial design and create its practical implementation. The build of firmware for the microcontroller unit is also the part of works. The measurement is based on a time-to-digital converter integrated circuit used in Light Detection and Ranging (LIDAR) applications. The designed device was completely implemented and tested by a set of practical measurements.
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