|
|
Video mixer/translator for web-based videoconference system
Hutar, Jan ; Balík, Miroslav (referee) ; Číka, Petr (advisor)
Bachelor s thesis specialises in a basic description, comparing and processing of video standards H.264 and VP8 in real time. Particularly it concerns a support of videoconfe- rence systems working with those mutually incompatible standards. The work enquires and tests two most considerable software devices convenient with basic requirements for working with video in real time and available with LGLP licence respectively FFmpeg and GStreamer. The thesis suggests practice video mix implementation of data input and the way of code translation into required outgoing stream. FFmpeg tool has been used for realization and message of mixer/translator and simple interface has been established available from web browser with assistance of HTML, PHP and Javascript.
|
|
|
HF and IF circuits of shortwave radiostation
Šnajdr, Václav ; Vágner, Petr (referee) ; Lukeš, Zbyněk (advisor)
The study, description, design and implementation of selected blocks of multiband shortwave radio station are dealt with in the thesis. Focus is placed on the concept of multiband shortwave radio stations, with an emphasis on high frequency and intermediate frequency circuits. The first chapter is devoted to description of the transceiver block diagram which is designed as superheterodyne. The design of bandpass input filters, intermediate frequency crystal filters and output filters is described. Simulation results and the measured characteristics of the implemented functional blocks are presented. Furthermore, the amplifier circuits which maintain impedance matching of individual blocks are discussed. SSB signal generation in the transmitter part of radio station and final stage power amplification are depicted.
|
|
|
Spectrum Analyzer up to 500 MHz
Čada, David ; Vimperk), Tomáš Baráth (Rohde Schwarz (referee) ; Šebesta, Jiří (advisor)
This project deals with design and realization of the spectrum analyser using double superheterodyne topology with frequency range up to 500MHz. This work solves hardware blocks like phase lock loops, intermediate frequency filters, saw filter, crystal filter, logarithmic detector. Content of work is also design description and tuning of spectrum analyzer parts.
|
|
| |
|
|
DRM signal receiver
Mik, Šimon ; Charvát, Jiří (referee) ; Šnajdr, Václav (advisor)
The master’s thesis deals with the design of DRM (Digital Radio Mondiale) receiver. The block diagram of receiver was chosen and particular blocks were theoretically analyzed. After that followed design and production of each block. The synthesizer was programmed and the receiver properties were verified. The last part of thesis deals with real receiving of DRM broadcast.
|
|
|
Universal audio interface for autonomous use
Trojak, Ondřej ; Šťáva, Martin (referee) ; Levek, Vladimír (advisor)
This text analyses the current situation within the audio signal work field and the appropriate ways of connecting electronic networks for processing blocks. The thesis deals with circuit design, firmware programming and physical realization of a subsequently measured autonomous battery-powered interface which provides volume control of input signals and conversion of different types of connectors and signal lines, consuming low power and adding low noise. The device is also equipped with a phantom power supply for condenser microphones. The control consists of a set of buttons, a rotary encoder and a display unit.
|
|
| |
|
| |
|
|
Video mixer/translator for web-based videoconference system
Hutar, Jan ; Balík, Miroslav (referee) ; Číka, Petr (advisor)
Bachelor s thesis specialises in a basic description, comparing and processing of video standards H.264 and VP8 in real time. Particularly it concerns a support of videoconfe- rence systems working with those mutually incompatible standards. The work enquires and tests two most considerable software devices convenient with basic requirements for working with video in real time and available with LGLP licence respectively FFmpeg and GStreamer. The thesis suggests practice video mix implementation of data input and the way of code translation into required outgoing stream. FFmpeg tool has been used for realization and message of mixer/translator and simple interface has been established available from web browser with assistance of HTML, PHP and Javascript.
|
|
|
Water mixer
Damajka, Štěpán ; Glos, Jan (referee) ; Veselý, Libor (advisor)
The aim of this bachelor thesis is to build device for mixing warm and cold water. Water mixer consists of a temperature sensor and flow sensor. Actuator devices are two-way diaphragm solenoid valves and three-way valve with servo-engine. Thesis focuses on identification system and design of a suitable controller.
|
guest ::
