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Video Movement Analysis Using Smartphones ViMAS: A Pilot Study
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A method of smart phone original video identification by using unique compression ratio pattern.

Min Gu Hwang1, Hyung Ju Park2, Dong Hwan Har2

  • 1Forensic Image Analysis Laboratory, Incheon, Republic of Korea.

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|August 10, 2019
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Smartphone video evidence can now be verified. This study analyzes video compression patterns to identify original file characteristics, enabling verification of digital video authenticity for legal and forensic use.

Keywords:
Digital forensicsEdit video identificationEncoding videoVideo compressionVideo forensic

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Area of Science:

  • Digital Forensics
  • Computer Science
  • Video Analysis

Background:

  • Smartphone videos are increasingly used as evidence.
  • Verification of smartphone video authenticity is crucial.
  • Existing methods for video verification are limited.

Purpose of the Study:

  • To develop a method for verifying smartphone video origin.
  • To analyze unique compression patterns in smartphone videos.
  • To establish a technical standard for video authenticity.

Main Methods:

  • Analysis of video metadata (resolution, frame rate, etc.).
  • Examination of unique compression algorithms and patterns.
  • Estimation of uncompressed video data from EXIF information.
  • Correlation analysis between recorded and virtual data.
  • Comparison of original and re-compressed video ratios.

Main Results:

  • Identified unique compression patterns specific to smartphone models.
  • Established a correlation between video data and compression ratios.
  • Developed a method to detect video re-compression.

Conclusions:

  • The proposed method can effectively identify the origin of smartphone videos.
  • This technique enhances the reliability of video evidence.
  • A new technical standard for video authenticity verification is proposed.