|
|
Embedded QR code generator with a graphic OLED display
Lakomý, Tomáš ; Krajsa, Ondřej (referee) ; Hanák, Pavel (advisor)
This master’s thesis deals with coding information and QR codes generating. There is described operation principle of QR codes for this purpose, and design of the equipment. This device is able to encode the information received through the serial port and display it in the QR code on the OLED display. Microprocessor is part of the device, so there is outlined the procedure for programming and testing equipment.
|
|
|
Comparison of Multimedia Signal Compression Possibilities
Špaček, Milan ; Mišurec, Jiří (referee) ; Škorpil, Vladislav (advisor)
Thesis deals with multimedia signal comparison of compression options focused on video and advanced codecs. Specifically it describes the encoding and decoding of video recordings according to the MPEG standard. The theoretical part of the thesis describes characteristic properties of the video signal and justification for the need to use recording and transmission compression. There are also described methods for elimination of encoded video signal redundancy and irrelevance. Further on are discussed ways of measuring the video signal quality. A separate chapter is focused on the characteristics of currently used and promising codecs. In the practical part of the thesis were created functions in Matlab environment. These functions were implemented into graphic user interface that simulates the activity of functional blocks of the encoder and decoder. Based on user-specified input parameters it performs encoding and decoding of any given picture, composed of images in RGB format, and displays the outputs of individual functional blocks. There are implemented algorithms for the initial processing of the input sequence including sub-sampling, as well as DCT, quantization, motion compensation and their inverse operations. Separate chapters are dedicated to the realisation of codec description in the Matlab environment and to the individual processing steps output. Further on are mentioned compress algorithm comparisons and the impact of parameter change onto the final signal. The findings are summarized in conclusion.
|
|
|
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.
|
|
|
Simulation of ADSL error protection systems
Bernat, Zbyněk ; Krajsa, Ondřej (referee) ; Šilhavý, Pavel (advisor)
The main objective of this thesis was to create a model of forward error correction (FEC) system used in ADSL modem, which will be able to check its individual settings using the test methods specified in Recommendation G.996.1. The work is divided into two basic parts – theoretical and practical. The first part describes the basic functional characteristics of ADSL system, with attention being paid to aspects affecting the activity and setting of the error protection system. There are also discussed the theoretical basics of FEC coding techniques used in ADSL. The work also contains a description of the method for testing DSL system resistance against impulsive interference, which is specified in Recommendation G.996.1. The practical part of this thesis contains a description of the proposed model of the FEC system. The model was implemented in the programming environment Matlab Simulink. The proposed model includes the simulation of FEC coding process, DMT modulation and transmission channel with the impulse interference and the background noise. The proposed program is able to calculate parameters for setting FEC system from the specified data transfer rates and the requirement for interleaving. In addition, allows you to set the parameters of transmission line and sources of impulse interference and of the background noise. Under the set of input characteristics of the transmission is calculated bit allocation and the resulting parameters are given to a computational core of the model. In the application can be performed two types of test tasks. The first one is based on the Recommendation G.996.1 and makes it possible to determine probability of errored second. The second test task is for the measurement of resistance of the transmission system against impulsive interference. The results of the simulations are summarized in the conclusion of work.
|
|
| |
|
|
Analysis and development of responsive website interface
Beránek, Jakub ; Střížová, Vlasta (advisor) ; Soukup, Petr (referee)
The thesis deals with the analysis and development of responsive interface of online stores' websites. The work is divided into several chapters, which can be divided generally into two main parts, theoretical and practical. In the first theoretical part there are different perspectives and analyzes, that need to be defined for web development and possibilities of progression of the web sites along with testing the correctness of individual steps and procedures, explained. The practical part consists in the implementation of the proposals and creating designs typical for company based on informations gathered from the analysis of the accessibility and usabiity of original pages and pages of competition. Part of crafting proposals and graphics is user testing, processing comments and found bugs. Thanks to these aquired knowledge there is in the final part designed and implemented new look along with a basis for possible further development and expansion opportunities in the future.
|
|
|
Analysis of High Efficiency Video Coding
Svoboda, Jaroslav ; Ivánek, Jiří (advisor) ; Palovský, Radomír (referee)
Standard MPEG-H part 2/H.265 alias High Efficiency Video Coding (HEVC) is patterned on MPEG-4 part 10/H.264. Although it is A new standard developed to be more efficient, its implementation is sequential and therefore there are no guarantees that the output video file will achieve the quality it possibly can within this standard. To determine how this hypothesis is fulfilled, this thesis uses the methods PSNR and SSIM which compare input and output. Another consideration is computational complexity or, in other words, the power demand, which was tested by comparing the battery life of two cell phones. Test results confirmed higher compression effectivity and higher computational complexity of standard MPEG-H part 2/H.265 as well.
|
|
|
Responzivní webdesign a jeho praktické využití
Slíva, Ondřej
This bachelor thesis deals with responsive webdesign. In the theoretical part is mentioned what actually responsive webdesign is, what does it deal with, why it makes sense to deal with it, what is the alternative to it and what are its advantages and disadvantages. Furthermore are mentioned meta tag viewport and three basic elements of resposive webdesign, which are fluid layout, media queries and flexible images. The practical part deals with coding of responsive websites (according to Mobile first approach) for the company Návrh loga according to obtained graphical design.
|
|
|
Participation in youth house Analysis of the participation: Youth house management possibilities for inhabitants (Youth house in Pisek).
KEMPFER, Heřman
This thesis aims to analyze the possibilities of participation in youth home in Písek. The work deals with participation in youth home in Písek. The theoretical part will first introduce the surveyed organization. In the next chapter,I define the concept of participation and then concentrate on the current view of participation in youth home. The following chapters are devoted to communication, working with groups and individuals and personality of educator. The research section describes the definition of research and the topics. Following the interview, as other research method. The whole thesis concludes final summary and answer to research quest.
|
|
| |
guest ::
