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Revista Brasileira de Criminalística
Article . 2020 . Peer-reviewed
License: CC BY NC SA
Data sources: Crossref
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Avaliação de Descritores Acústicos Aplicados à Comparação Forense de Locutor

Authors: Adelino Pinheiro Silva; Maurílio Nunes Vieira; Adriano Vilela Barbosa;

Avaliação de Descritores Acústicos Aplicados à Comparação Forense de Locutor

Abstract

A comparação forense de locutor (CFL) consiste no confronto entre características de dois áudios, com o objetivo de associar as falas do áudio questionado a um indivíduo conhecido. Esse áudio, na maioria dos casos, é oriundo de interceptações telefônicas e possui codificação GSM (Global System Mobile), banda estreita e ruído de canal. Levantamentos do cenário mundial em CFL, realizados em 2011 e 2016, respectivamente pela Universidade de York e INTERPOL, indicaram que muitos peritos forenses baseavam-se em análises perceptuais e acústicas. Em contrapartida, a utilização de metodologias automáticas e assistidas são menos utilizadas. Nesse nicho, o presente trabalho busca explorar o potencial de características/descritores acústicos, como Componentes Mel Cepstrais e analisar o poder discriminante destas características acústicas extraídas de corpus. Os experimentos utilizaram cinco tipos de ruído em seis níveis de relação sinal ruído. Os cenários das comparações visam aproximar as condições forenses considerando a codificação GSM, a banda do sinal e o ruído de canal.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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