Original title: Restaurace zvukových signálů poškozených kvantizací
Translated title: Restoration of audio signals damaged by quantization
Authors: Šiška, Jakub ; Rajmic, Pavel (referee) ; Záviška, Pavel (advisor)
Document type: Master’s theses
Year: 2020
Language: slo
Publisher: Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií
Abstract: [slo] [eng]
Táto práca sa zaoberá reštauráciou zvukových signálov poškodených kvantizáciou. V teoretickej časti je popísaná kvantizácia a dekvantizácia všeobecne, rôzne existujúce metódy dekvantizácie audio signálov a opis teórie riedkych reprezentácií signálov. Ďalšia časť sa zaoberá algoritmami pre rekonštrukciu signálu Douglas–Rachford, Chambolle–Pock, SPADEQ a ich implementáciou v programe MATLAB v nasledujúcej kapitole. V poslednej časti práce sú tieto algoritmy otestované pomocou objektívnych ukazovateľov SDR, PEMO-Q, PEAQ a subjektívneho posluchového testu MUSHRA. This master’s thesis deals with the restoration of audio signals damaged by quantization. The theoretical part starts with a description of quantization and dequantization in general, few existing methods of dequantization of audio signals and theory of sparse representations of signals are also presented. The next part introduces algorithms suitable for dequantization, specifically Douglas–Rachford, Chambolle–Pock, SPADEQ and implementation of these algorithms in MATLAB application in the next chapter. In the last part of this thesis, testing of reconstructed signals using the algorithms takes place and results are evaluated by objective measures SDR, PEMO-Q, PEAQ and subjective listening test MUSHRA.
Keywords: audio signal; Chambolle–Pock; dequantization; Douglas–Rachford; Quantization; signal processing; SPADEQ; sparse representation

Institution: Brno University of Technology (web)
Document availability information: Fulltext is available in the Brno University of Technology Digital Library.
Original record: http://hdl.handle.net/11012/189400

Permalink: http://www.nusl.cz/ntk/nusl-413249


The record appears in these collections:
Universities and colleges > Public universities > Brno University of Technology
Academic theses (ETDs) > Master’s theses