Forward Adaptive Dual-Mode Quantizer Based on the First-Degree Spline Approximation and Embedded G.711 Codec

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dc.contributor.authorPeric, Zoran
dc.contributor.authorNikolic, Jelena
dc.contributor.authorDenic, Bojan
dc.contributor.authorDespotovic, Vladimir
dc.coverage.issue4cs
dc.coverage.volume28cs
dc.date.accessioned2020-04-30T12:16:41Z
dc.date.available2020-04-30T12:16:41Z
dc.date.issued2019-12cs
dc.description.abstractIn this paper, we propose a novel model of dual-mode quantizer that combines the restricted and unrestricted forward adaptive piecewise linear scalar quantizers based on the first degree-spline functions, one of them being forward adaptive G.711 quantizer used as the unrestricted one. The analysis presented in the paper can be considered as our further research in the field of dual-mode quantization. In particular, in our novel model we utilize G.711 codec due to the compatibility reasons and we develop one completely novel model of restricted quantizer based on the first-degree spline approximation, which is optimized for the assumed Laplacian source so that to provide a minimal mean-squared error distortion. Moreover, unlike previous dual-model quantizer models that processed signals in frame-by-frame manner, our novel model utilizes frame/subframe processing of the signal in order to decrease the total bit rate. The theoretical analysis in a wide dynamic range of input signal variances reveals that the proposed model of quantizer is superior versus the unrestricted G.711 quantizer as well as other similar baselines having the same number of quantization levels. In addition, the results of the experimental analysis performed on the real speech signal show a good agreement with the theoretical ones.en
dc.formattextcs
dc.format.extent729-739cs
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRadioengineering. 2019 vol. 28, č. 4, s. 729-739. ISSN 1210-2512cs
dc.identifier.doi10.13164/re.2019.0729en
dc.identifier.issn1210-2512
dc.identifier.urihttp://hdl.handle.net/11012/186918
dc.language.isoencs
dc.publisherSpolečnost pro radioelektronické inženýrstvícs
dc.relation.ispartofRadioengineeringcs
dc.relation.urihttps://www.radioeng.cz/fulltexts/2019/19_04_0729_0739.pdfcs
dc.rightsCreative Commons Attribution 4.0 International licenseen
dc.rights.accessopenAccessen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectScalar quantizationen
dc.subjectrestricted quantizationen
dc.subjectdual-mode quantizationen
dc.subjectLaplacian sourceen
dc.subjectSQNRen
dc.titleForward Adaptive Dual-Mode Quantizer Based on the First-Degree Spline Approximation and Embedded G.711 Codecen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.affiliatedInstitution.facultyFakulta eletrotechniky a komunikačních technologiícs
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