Počet záznamů: 1
Two Methods of Mechanical Noise Reduction of Recorded Speech During Phonation in an MRI devic
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SYSNO ASEP 0363068 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Two Methods of Mechanical Noise Reduction of Recorded Speech During Phonation in an MRI devic Tvůrce(i) Přibil, J. (SK)
Horáček, Jaromír (UT-L) RID, ORCID
Horák, Petr (URE-Y)Zdroj.dok. Measurement Science Review. - : Sciendo - ISSN 1335-8871
Roč. 11, č. 3 (2011), s. 92-98Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. SK - Slovensko Klíč. slova speech processing ; noise reduction ; NMR imaging Vědní obor RIV BI - Akustika a kmity CEP GA102/09/0989 GA ČR - Grantová agentura ČR CEZ AV0Z20760514 - UT-L (2005-2011) AV0Z20670512 - URE-Y (2005-2011) UT WOS 000293837500004 DOI 10.2478/v10048-011-0017-y Anotace The paper presents two methods of noise reduction of speech signal recorded in an MRI device during phonation for the human vocal tract modelling. The applied approach of noise signal cleaning is based on cepstral speech analysis and synthesis because the noise is mainly produced by gradient coils, has a mechanical character, and can be processed in spectral domain. Our first noise reduction method is using real cepstrum limitation and clipping the “peaks” corresponding to the harmonic frequencies of mechanical noise. The second method is coming out from substation of the short-time spectra of two signals recorded withal: the first includes speech and noise, and the second consists of noise only. The resulting speech quality was compared by spectrogram and mean periodogram methods. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2012
Počet záznamů: 1