Effects of audio coding on ICA performance: an experimental study
Identifieur interne : 001152 ( Main/Exploration ); précédent : 001151; suivant : 001153Effects of audio coding on ICA performance: an experimental study
Auteurs : Matthieu Puigt [France] ; Emmanuel Vincent [France] ; Yannick Deville [France] ; Anthony Griffin [Grèce] ; Athanasios Mouchtaris [Grèce]Source :
Abstract
In this paper, we study the influence of lossy audio coding on the performance of Independent Component Analysis (ICA). In particular, we derive two compression scenarios from practical implementations. In the first case, we consider the situation when the sources are independently compressed, decompressed and then mixed. In the second, we consider the situation when mixtures of sources are jointly compressed. We experimentally show that the modification of the spectrotemporal diversity due to compression has almost no effect on the performance of ICA methods. We also show that the two tested stereo encoding strategies have a major effect on the performance of ICA, especially when the mixed signals are compressed at low bit rates. As these strategies have been extended to audio systems involving much more than two channels, our work suggests that ICA will not be able to successfully process the high number of observations provided by modern immersive audio systems.
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Hellas</orgName><orgName type="acronym">FORTH-ICS</orgName><desc><address><addrLine>Institute of Computer Science, Foundation for Research and Technology - Hellas (FORTH-ICS) and Department of Computer Science, University of Crete Heraklion, Crete, Greece</addrLine><country key="GR"></country></address></desc><listRelation><relation active="#struct-91821" type="direct"></relation></listRelation><tutelles><tutelle active="#struct-91821" type="direct"><org type="institution" xml:id="struct-91821" status="VALID"><orgName>University of Crete</orgName><desc><address><addrLine>Campus 74100 Rethymnon Crete, Greece</addrLine><country key="GR"></country></address><ref type="url">http://www.uoc.gr/en/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>Grèce</country></affiliation></author></analytic></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In this paper, we study the influence of lossy audio coding on the performance of Independent Component Analysis (ICA). In particular, we derive two compression scenarios from practical implementations. In the first case, we consider the situation when the sources are independently compressed, decompressed and then mixed. In the second, we consider the situation when mixtures of sources are jointly compressed. We experimentally show that the modification of the spectrotemporal diversity due to compression has almost no effect on the performance of ICA methods. We also show that the two tested stereo encoding strategies have a major effect on the performance of ICA, especially when the mixed signals are compressed at low bit rates. As these strategies have been extended to audio systems involving much more than two channels, our work suggests that ICA will not be able to successfully process the high number of observations provided by modern immersive audio systems.</div></front></TEI><affiliations><list><country><li>France</li><li>Grèce</li></country><region><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Metz</li><li>Nancy</li></settlement><orgName><li>Université de Lorraine</li></orgName></list><tree><country name="France"><noRegion><name sortKey="Puigt, Matthieu" sort="Puigt, Matthieu" uniqKey="Puigt M" first="Matthieu" last="Puigt">Matthieu Puigt</name></noRegion><name sortKey="Deville, Yannick" sort="Deville, Yannick" uniqKey="Deville Y" first="Yannick" last="Deville">Yannick Deville</name><name sortKey="Vincent, Emmanuel" sort="Vincent, Emmanuel" uniqKey="Vincent E" first="Emmanuel" last="Vincent">Emmanuel Vincent</name></country><country name="Grèce"><noRegion><name sortKey="Griffin, Anthony" sort="Griffin, Anthony" uniqKey="Griffin A" first="Anthony" last="Griffin">Anthony Griffin</name></noRegion><name sortKey="Mouchtaris, Athanasios" sort="Mouchtaris, Athanasios" uniqKey="Mouchtaris A" first="Athanasios" last="Mouchtaris">Athanasios Mouchtaris</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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