1 research outputs found
Archive Audio Record Content Identification
Tato práce se zabĂ˝vá problematikou identifikace (rozpoznávanĂ) obsahu archivnĂch zvukovĂ˝ch záznamĹŻ. CĂlem je seznámenĂ s danou problematikou a realizace vybranĂ©ho algoritmu identifikace v programovĂ©m prostĹ™edĂ MATLAB. HlavnĂmi kroky v realizovanĂ©m algoritmu jsou segmentace, parametrizace a klasifikace. ImplementovanĂ˝ algoritmus vyuĹľĂvá klasifikátoru k-Nearest Neighbors (KNN). VĂ˝stupem tĂ©to práce je systĂ©m, kterĂ˝ je schopnĂ˝ identifikovat jednotlivĂ© typy zvukovĂ˝ch záznamĹŻ (Ĺ™eÄŤ, hudba, hluk, ticho) ve vstupnĂ archivnĂ nahrávce. SystĂ©m odhaduje pravdÄ›podobnost vĂ˝skytu jednotlivĂ˝ch typĹŻ zvuku v závislosti na ÄŤase. Funkce algoritmu je ověřena na ukázkách nahrávek z archivnĂch filmĹŻ.This bachelor thesis introduces the problem of content-based identification (recognition) of archive audio records. The goal of this thesis is to familiarize with the problem and to implement the selected method of the identification in MATLAB environment. The main steps of the algorithm include segmentation, feature extraction and classification. The algorithm uses k-Nearest Neighbors (KNN) classifier. The outcome of this work is represented by a system which is capable of identifying different types of audio records (speech, music, noise, silence) in the input archive record. The system estimates the time relevant probability of occurrence of mentioned types of audio records. Functionality of the algorithm is verified with records from archive movies