TECHNIQUES TO EXTRACT ENF SIGNALS FROM VIDEO IMAGE SEQUENCES EXPLOITING THE ROLLING SHUTTER MECHANISM; AND A NEW VIDEO SYNCHRONIZATION APPROACH BY MATCHING THE ENF SIGNALS EXTRACTED FROM SOUNDTRACKS AND IMAGE SEQUENCES

摘要

Various systems and methods may benefit from determination of environmental signatures in recordings. For example, such signatures may aid forensic analysis and alignment of media recordings, such as alignment of audio or video recordings. A method can include extracting electric network frequency signals from an image sequence of a video recording or an audio recording. The method can also include synchronizing the video recording or the audio recording with at least one other datum based on the electric network frequency signals.