Audio codec identification from coded and transcoded audios

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dc.contributor.authorHicsonmez, Samet
dc.contributor.authorSencar, Husrev T.
dc.contributor.authorAvcibas, Ismail
dc.date.accessioned2025-10-24T18:09:00Z
dc.date.available2025-10-24T18:09:00Z
dc.date.issued2013
dc.departmentMalatya Turgut Özal Üniversitesi
dc.description.abstractA novel technique is presented to identify the codec of a coded audio. The technique does not perform decoding, utilize any coding metadata, or assume information about the structure describing the bit stream format of a codec. The underlying idea of the technique is that the design choices governing the compression level, audio quality and complexity of a codec will reveal themselves on the coded audio. To exploit this, the technique samples 2-4 kilobytes of data from a coded audio and analyzes the randomness and chaotic nature of the sampled data to build statistical models that represent encoding process associated with different codecs. In experiments, we utilize 16 of the most popular audio codecs used for high quality audio compression and in PSTNs, cellular networks, and VoIP networks by setting encoding parameters of each codec to its most commonly used values. Results show that the codec of an encoded audio can be identified with an accuracy of more than 95 percent. Other experiments considering several transcoding scenarios were also performed. Those results show that the scheme can even discriminate the first encoder of a doubly-encoded audio with an accuracy range of around 80 to 90 percent or more as long as the second codec operates on higher bit rates than the first one. (C) 2013 Elsevier Inc. All rights reserved.
dc.description.sponsorshipScientific and Technological Research Council of Turkey [110E049]
dc.description.sponsorshipThis material is based upon work supported by the Scientific and Technological Research Council of Turkey under research grant number 110E049.
dc.identifier.doi10.1016/j.dsp.2013.04.005
dc.identifier.endpage1730
dc.identifier.issn1051-2004
dc.identifier.issn1095-4333
dc.identifier.issue5
dc.identifier.scopus2-s2.0-84882448416
dc.identifier.scopusqualityQ1
dc.identifier.startpage1720
dc.identifier.urihttps://doi.org/10.1016/j.dsp.2013.04.005
dc.identifier.urihttps://hdl.handle.net/20.500.12899/3409
dc.identifier.volume23
dc.identifier.wosWOS:000323855500035
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAcademic Press Inc Elsevier Science
dc.relation.ispartofDigital Signal Processing
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20251023
dc.subjectAudio codecs; Codec identification; PSTN; VoIP; GSM; Compression
dc.titleAudio codec identification from coded and transcoded audios
dc.typeArticle

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