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US 2018/0205922 A1Published application
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
AssigneeUniversity of Maryland, College Park
InventorsMin WU, Adi HAJJ-AHMAD, Hui SU
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Abstract
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.
Claims20
A method, comprising:
- extracting electric network frequency signals from a video recording;
- and
- determining at least a time of recording of the video based on the electric network frequency signals.
An apparatus, comprising:
- at least one processor;
- and
- at least one memory including computer program code,
- wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to
- extract electric network frequency signals from a video recording or an audio recording;
- and
- determine at least a time of recording of the video based on the electric network frequency signals.
4 more elements
Dependencies are inferred from the claim text.