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Interactive web applications supporting education
Kratoš, Filip ; Koldovský, Zbyněk (referee) ; Rajmic, Pavel (advisor)
This term paper is focused on design of web applets using Javascript. It deals with design of six applets works with one-dimensional signals, especially audio-signals. The applets are Combination of Signals, Summation of Sine and Cosine Functions, Signal Filtering, Effect of Phase on Audio-signal, Effect of Aliasing, and Linear and Nonlinear Systems. Main themes of the paper are theoretical background for applets, implementation of one applet and design of the interfaces of other applets.
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Restoration of degraded audiosignals using sparse representations
Mokrý, Ondřej ; Veselý, Vítězslav (referee) ; Rajmic, Pavel (advisor)
This bachelor thesis is focused on the problem of inpainting a segment of missing samples in an audiosignal. The signal is represented as sparse vector using discrete Gabor transform. The problem of inpainting missing samples while preserving the sparsity of the representation is formulated as an optimisation task, which is then solved using Douglas-Rachford algorithm. In contrast with the state-of-the-art approaches, the algorithm is extended by proposing method for compensating the energy decrease which occurs in the restored signal.
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Presence and action of negative audio signals in environment
Renza, Pavel ; Šebesta, Vladimír (referee) ; Sigmund, Milan (advisor)
The thesis deals with negative influences of audio signals in the environment and the impact of the signals on human in psychological and physiological point of view. The origins of such audio signals as well as protection from their negative effects are considered. The thesis includes an overview study of standards and basic literature. Selected audio signals are presented using a program for negative audio signal analysis.
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