Resumo

SEPULVEDA, Alexander. Influence of the properties of audio records in speaker verification systems in a forensic context: a review of the state of the art. LogosCyT [online]. 2019, vol.11, n.3, pp.181-194.  Epub 28-Dez-2019. ISSN 2145-594X.  https://doi.org/10.22335/rlct.v11i3.982.

The procedure for verifying speakers (SV) in the forensic field must be reliable. However, the performance is affected by the intrinsic properties of audio records. In this regard, it is important to analyze the impact on the SV methods found in the forensic field in order to be able to carry out more reliable procedures in forensic proceedings. In this article, the analysis is based on studies reported in the state of the art, from which it is found that the performance of the verification process depends on properties such as type of coding, audio length, noise content, presence of saturations and transients, where the degree of affectation of these properties depends on the verification method that is used. Although there are other elements that affect performance, this research addresses the aforementioned. According to the review carried out, there is a lack of reports about the degree of affectation, especially in the case of methods other than the automatic method. In addition, regarding the influence of the saturation of the dynamic and transient range, not much reported information was found, which makes it difficult to establish their influence.

Palavras-chave : voice comparison methods; forensic acoustics; coding; speaker verification; signal-to-noise ratio.

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