Factors Affecting ENF Capture in Audio
Factors Affecting ENF Capture in Audio
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DOI：
10.1109/tifs.2018.2837645
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发表时间：
2019-02-01
影响因子：
6.8
通讯作者：
Wu, Min
中科院分区：
文献类型：
--
作者：
Hajj-Ahmad, Adi;Wong, Chau-Wai;Wu, Min
电网频率 (ENF) 信号是一种环境特征，可以在有电力活动的地点录制的视听记录中捕获。该信号受到进行记录的电网的影响，最近的研究表明它可用于许多取证和安全应用。 ENF 研究中一个尚未充分研究的领域是影响媒体记录中 ENF 痕迹捕获的因素。并非所有在电活动区域进行的记录都会带有显着的 ENF 痕迹，并且捕获 ENF 痕迹的强度可能因记录而异。彻底了解可能影响记录中 ENF 痕迹捕获的因素对于了解基于 ENF 的方法的适用性至关重要，并且有助于为未来的相关研究提供信息。本文针对这些因素进行了研究，重点关注音频信号。显示并分析了录音机的特性以及录音环境和方式对内在捕获的 ENF 的影响。
The electric network frequency (ENF) signal is an environmental signature that can be captured in audiovisual recordings made in locations where there is electrical activity. This signal is influenced by the power grid in which the recording is made, and recent work has shown that it can be useful toward a number of forensics and security applications. An under-studied area of ENF research is the factors that can affect the capture of ENF traces in media recordings. Not all recordings made in the areas of electrical activity will carry prominent ENF traces, and the strengths by which the ENF traces are captured can vary from one recording to another. A thorough understanding of the factors that can affect the capture of ENF traces in recordings is essential to understanding the applicability of ENF-based approaches and can help inform related studies in the future. This paper carried out a study on such factors, with a focus on audio signals. The impact of the characteristics of an audio recorder and the environment and manner of recording on the intrinsically captured ENF are shown and analyzed.