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http://dx.doi.org/10.13064/KSSS.2022.14.3.103

A comparative analysis of metadata structures and attributes of Samsung smartphone voice recording files for forensic use  

Ahn, Seo-Yeong (Department of Future Convergence Technology Engineering, Sungshin Women's University)
Ryu, Se-Hui (Department of Future Convergence Technology Engineering, Sungshin Women's University)
Kim, Kyung-Wha (Forensic Science Division, Supreme Prosecutor's Office)
Hong, Ki-Hyung (Department of Service Design Engineering, Sungshin Women's University)
Publication Information
Phonetics and Speech Sciences / v.14, no.3, 2022 , pp. 103-112 More about this Journal
Abstract
Due to the popularization of smartphones, most of the recorded speech files submitted as evidence of recent crimes are produced by smartphones, and the integrity (forgery) of the submitted speech files based on smartphones is emerging as a major issue in the investigation and trial process. Samsung smartphones with the highest domestic market share are distributed with built-in speech recording applications that can record calls and voice, and can edit recorded speech. Unlike editing through third-party speech (audio) applications, editing by their own builtin speech applications has a high similarity to the original file in metadata structures and attributes, so more precise analysis techniques need to prove integrity. In this study, we constructed a speech file metadata database for speech files (original files) recorded by 34 Samsung smartphones and edited speech files edited by their built-in speech recording applications. We analyzed by comparing the metadata structures and attributes of the original files to their edited ones. As a result, we found significant metadata differences between the original speech files and the edited ones.
Keywords
audio metadata; voice recording; speech forgery detection; MPEG (Moving Picture Experts Group)-4;
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