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Showing 4 out of a total of 4 results for community: Технически университет - София. (0.002 seconds)

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Алгоритми, използвани при въвеждането и разпознаването на „воден знак“ за аудио сигнали

Момчеджиков, Михаил Благоев; Иванов, Ангел З.; Лишков, Славчо Димитров (рец.); Momchedzhikov, Mihail Blagoev; Ivanov, Angel Z., (2004)
Wide spreading of digital data over the Internet has lead to the increasing need of finding a way to protect their copyright. For that reason protections like digital watermarking have become an interesting area for investigations and scientific researches. In this paper a brief description of the digital watermarking technique is made. A comparison between steganography and compression is also discussed. The authors have gone through the basic elements, needed for the construction of a system for embedding and extraction of digital watermarks.
Метод за премахване на отскоци от аудио сигналите въз основа на анализ във времевата област

Момчеджиков, Михаил Благоев; Козарев, Иван К.; Лишков, Славчо Димитров (рец.); Momchedzhikov, Mihail Blagoev; Kozarev, Ivan, (2004)
During the recording and transmiddion process of audio signals there are situation when the output signals is distorted from norse.The archive recordings which have very important for the art and history are also noisy distorted. The distortion, cracks and picks in the sound signals have very different nature and ifluence on the sound signals and subjective estimation of the listener.In the artikel are discussed a method for extraction the picks in audio signals .The goal should be the design of effecttw algorithm for extraction of the picks.
Сравнителен анализ на някои разпределения на звукови сигнали от гледна точка на звуковата картина в дифузно помещение

Момчеджиков, Михаил Благоев; Дамянов, Дамян; Лишков, Славчо Димитров (рец.); Momchedzhikov, Mihail Blagoev; Damyanov, Damyan, (2004)
This paper reviews different models of time frequency changes and frequency distribution of sound signals. The models, are applied to the representation of room acoustics quality; the restoration (denoising) of measured room impulse responses; artificial reverberation and distance effects in virtual auditory displays by audio signal processing systems.
Някои аспекти на синтеза на звукови полета

Момчеджиков, Михаил Благоев; Дамянов, Дамян; Лишков, Славчо Димитров (рец.); Momchedzhikov, Mihail Blagoev; Damyanov, Damyan, (2004)
The Wave Field Synthesis (WES) concepts have steadily gained popularity over the past decade. It is based on physical sound field rendering within a certain listening area. The pure audio signal is combined with informations about the room and the source's position to enable the accurate reproduction of the source within its acoustical environment. This is made by precise construction of the desired wave field by secondary sources; implemented as arrays of loudspeakers. The method is implemented in a practical approach based on physical as well as perceptual laws. Sound rendering requires that many different aspects are considered, especially when rendering a real-time virtual environment.