影响基于Enf的视频记录时间估计的因素

ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) Pub Date : 2019-05-12 DOI:10.1109/ICASSP.2019.8682419

Saffet Vatansever, A. Dirik, N. Memon

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引用次数: 20

摘要

ENF(电网频率)在标称值(50/ 60hz)附近振荡，因为消耗和产生的功率之间不平衡。由市电供电的光源的强度随ENF的波动而变化。这些波动可以从在主电源照明下录制的视频中提取出来。这项工作研究了从视频中估计的ENF信号的质量如何受到不同光源照明、压缩比和社交媒体编码的影响。还探讨了ENF地基真值数据库长度对记录检测和验证时间的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Factors Affecting Enf Based Time-of-recording Estimation for Video

ENF (Electric Network Frequency) oscillates around a nominal value (50/60 Hz) due to imbalance between consumed and generated power. The intensity of a light source powered by mains electricity varies depending on the ENF fluctuations. These fluctuations can be extracted from videos recorded in the presence of mains-powered source illumination. This work investigates how the quality of the ENF signal estimated from video is affected by different light source illumination, compression ratios, and by social media encoding. Also explored is the effect of the length of the ENF ground-truth database on time of recording detection and verification.

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ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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