Forenzička audio analiza i prepoznavanje govornika

master's thesis

• Title (english): Forensic audio analysis and speaker recognition
• Author: Ana Sabol
• Mentor: Kristian Jambrošić (mentor)
• Committee member: Kristian Jambrošić (predsjednik povjerenstva)
• Committee member: Bojan Ivančević (član povjerenstva)
• Committee member: Ivan Đurek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2015-07-13, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Tema ovog rada dijeli se u dvije cjeline: forenzička audio analiza i prepoznavanje govornika. Na početku rada opisan je razvoj audio medija od fonografa pa sve do SSD diskova. U forenzičkoj audio analizi proučavaju se sva područja forenzičke audio obrade. Proces prepoznavanja govornika vrši se preko određenih atributa glasa. Iz teoretskih proučavanja prirode glasa i promjena atributa razvijeno je nekoliko algoritama i metoda prepoznavanja govora i govornika. Proučavanjem formanta i njihovog podudaranja analizirane su snimke govornika. Uspoređivane su snimke istog govornika, ali drugačijeg tempa, tonaliteta, naglaska govora te računalno dodanim bijelim šumom.

Abstract (english)

This thesis is divided into two sections: forensic audio analysis and speaker recognition. Firstly the development of audio media is described, from the phonograph through SSD disks. The forensic audio analysis studied all areas of forensic audio processing. Speaker recognition is performed using certain voice attributes. Using theoretical studies of the nature of voice and attributes changes, several voice and speaker recognition algorithms and methods have been developed. By analyzing the formants and their correspondence, speakers audio recordings have been studied. Same speaker recordings were compared, but with different speech pace, mode, accent and with computer-added white noise.

• Keywords: audio forenzika; forenzička audio analiza; forenzička audio obrada; prepoznavanje govornika
• Keywords (english): audio forensics; audio forensic analysis; audio forensic processing; speaker recognition
• Language: croatian
• URN:NBN: urn:nbn:hr:168:702690
• Study programme: Title: Information and Communication Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije (magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 11:40:15