ENF Signal Induced by Power Grid: A New Modality for Video Synchronization
ENF Signal Induced by Power Grid: A New Modality for Video Synchronization
复制标题
电网感应ENF信号：视频同步的新模式
DOI：
10.1145/2660579.2660588
复制
发表时间：
2014
影响因子：
3.7
通讯作者：
Min Wu
中科院分区：
文献类型：
--
作者：
Hui Su;Adi Hajj;Chau;Ravi Garg;Min Wu
可以合成从可能不同的视角捕获相同场景的多个视频，以获得新颖的沉浸式体验。同步对于涉及多条视听数据的此类应用是重要的任务。在这项工作中，我们利用电力网络频率（ENF）信号固有地嵌入在音轨和/或视频的图像序列在时间上对齐视频记录。ENF是电网中配电网络的供电频率。其值从其标称值50 Hz或60 Hz略微波动，并且波动趋势在同一网格内保持一致。由于电磁干扰和其他物理现象，在电活动区域创建的音频和视频记录可能会捕获ENF信号。我们建议通过对齐嵌入的ENF信号来同步视频记录。没有像许多现有方法那样对视角和相机校准施加重大限制，所提出的方法作为一种新的同步方式出现。
Multiple videos capturing the same scene from possibly different viewing angles may be synthesized for novel immersive experience. Synchronization is an important task for such applications involving multiple pieces of audio-visual data. In this work, we exploit the electric network frequency (ENF) signal inherently embedded in the soundtrack and/or image sequence of video to temporally align video recordings. ENF is the supply frequency of power distribution networks in a power grid. Its value fluctuates slightly from its nominal value of 50 Hz or 60 Hz, and the fluctuation trends stay consistent within the same grid. Audio and video recordings that are created in areas of electric activities may capture the ENF signal due to electromagnetic interferences and other physical phenomena. We propose to synchronize video recordings by aligning the embedded ENF signals. Without major constraints on viewing angle and camera calibration as many existing methods impose, the proposed approach emerges as a new synchronization modality.