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Title:Odstranjevanje akustičnega odmeva
Authors:ID Kovačevič, Gregor (Author)
ID Kačič, Zdravko (Mentor) More about this mentor... New window
Files:.pdf UN_Kovacevic_Gregor_2017.pdf (2,57 MB)
MD5: C68C4D5F28EEFD1C5A6EA910CF4FC697
PID: 20.500.12556/dkum/d55bdb37-a3ab-43de-81b4-586faf047a0c
 
Language:Slovenian
Work type:Diploma project paper
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:Namen projektnega dela je seznanitev s celotnim procesom odstranjevanja akustičnega odmeva v konferenčnih sobah, ki zagotavlja ustrezno razumevanje govora. Ukvarja se s prostorsko akustiko in algoritmi, ki odpravljajo odmev pri prenosu govora preko prostoročnih telefonov ali telefonije preko internetnega protokola. V kolikor želimo dušiti odmev sobe v celotnem slišnem frekvenčnem področju, uporabimo pasivne mešane strukture, ki jih namestimo na stene, pogosto kombinacija poroznih absorberjev in resonatorjev. Za odstranjevanje akustičnega odmeva, ki ga zajame mikrofon, smo algoritme preizkusili v okolju MATLAB. Najboljša izbira za realizacijo na signalnem procesorju je algoritem NLMS, v prihodnosti s hitrejšimi signalnimi procesorji pa tudi RLS.
Keywords:akustični, odmev, odstranjevanje, algoritmi
Place of publishing:Maribor
Publisher:[G. Kovačevič]
Year of publishing:2017
PID:20.500.12556/DKUM-68023 New window
UDC:621.3
COBISS.SI-ID:21126422 New window
NUK URN:URN:SI:UM:DK:WH6HCROU
Publication date in DKUM:29.01.2018
Views:1575
Downloads:104
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:06.09.2017

Secondary language

Language:English
Title:Acoustic echo cancellation
Abstract:The purpose of this project is to get familiar with the complete process of cancelling acoustic reverberation in conference rooms, which ensures good speech recognition. It is based on room acoustics and algorithms, which cancel echo that is made in hands-free or VoIP communication. In conference room, the reverberation from whole frequency spectrum is eliminated with mixed passive structures, such as porous materials and resonators which are placed on the walls. For elimination of echo, which is picked up by microphone, we tried different algorithms in MATLAB environment. The best pick for realization on digital signal processor currently is NLMS with RLS being the option in future when DSP’s get faster.
Keywords:acoustic, echo, cancellation, algorithms


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