Citation

Hwang MG, Har DH. J. Forensic Sci. 2017; 62(6): 1617-1626.

Affiliation

Digital Scientific Imaging Laboratory, Graduate School of Advanced Imaging Science, Multimedia, and Film, Chung-Ang University, Seoul, Korea.

Copyright

(Copyright © 2017, American Society for Testing and Materials, Publisher John Wiley and Sons)

DOI

10.1111/1556-4029.13451

PMID

28205218

Abstract

This study designs a method of identifying the camera model used to take videos that are distributed through mobile phones and determines the original version of the mobile phone video for use as legal evidence. For this analysis, an experiment was conducted to find the unique characteristics of each mobile phone. The videos recorded by mobile phones were analyzed to establish the delay time of sound signals, and the differences between the delay times of sound signals for different mobile phones were traced by classifying their characteristics. Furthermore, the sound input signals for mobile phone videos used as legal evidence were analyzed to ascertain whether they have the unique characteristics of the original version. The objective of this study was to find a method for validating the use of mobile phone videos as legal evidence using mobile phones through differences in the delay times of sound input signals.

© 2017 American Academy of Forensic Sciences.

Language: en

Keywords

edit video identification; encoding video; forensic science; mobile phone identification; sound signal; source camera; video forensics