Linear-Phase Octave Graphic Equalizer

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorBruschi, Valeria
dc.contributor.authorVälimäki, Vesa
dc.contributor.authorLiski, Juho
dc.contributor.authorCecchi, Stefania
dc.contributor.departmentDept Signal Process and Acoust
dc.contributor.departmentUniversità Politecnica delle Marche
dc.date.accessioned2022-10-19T06:47:02Z
dc.date.available2022-10-19T06:47:02Z
dc.date.issued2022-06
dc.description.abstractA computationally efficient octave-band graphic equalizer having a linear-phase response is introduced. The linear-phase graphic equalizer is useful in audio applications in which phase distortion is not tolerated, such as in multichannel equalization, parallel processing, phase compatibility of audio equipment, and crossover network design. The structure is based on the interpolated finite impulse response (IFIR) philosophy. The proposed octave-band graphic equalizer uses one prototype low-pass filter, which is a half-band FIR filter designed using the window method. Stretched versions of the prototype filter and its complementary high-pass filter implement all ten band filters needed. The graphic equalizer is realized in the parallel form, in which the outputs of all band filters, scaled with their individual command gain, are added to compute the equalized output signal. The command gains can be used directly as filter band gains. The number of operations needed per sample is only slightly more than that needed for the graphic equalizer based on minimum-phase recursive filters. A comparison with other implementation approaches demonstrates that the proposed structure requires 99% fewer operations than a high-order FIR filter. The proposed filter uses 39% fewer operations per sample than the fast Fourier transform--based filtering method and causes over 78% less latency.en
dc.description.versionPeer revieweden
dc.format.extent11
dc.format.extent435-445
dc.format.mimetypeapplication/pdf
dc.identifier.citationBruschi , V , Välimäki , V , Liski , J & Cecchi , S 2022 , ' Linear-Phase Octave Graphic Equalizer ' , Journal of the Audio Engineering Society , vol. 70 , no. 6 , pp. 435-445 . < https://www.aes.org/e-lib/browse.cfm?elib=21794 >en
dc.identifier.issn1549-4950
dc.identifier.otherPURE UUID: d2e36fb1-7b7c-4649-9cf4-08503899330b
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/d2e36fb1-7b7c-4649-9cf4-08503899330b
dc.identifier.otherPURE LINK: https://www.aes.org/e-lib/browse.cfm?elib=21794
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/89040683/Bruschi2022_Linear_phase_GEQ.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/117283
dc.identifier.urnURN:NBN:fi:aalto-202210196071
dc.language.isoenen
dc.publisherAudio Engineering Society
dc.relation.ispartofseriesJournal of the Audio Engineering Societyen
dc.relation.ispartofseriesVolume 70, issue 6en
dc.rightsopenAccessen
dc.titleLinear-Phase Octave Graphic Equalizeren
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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