Impact of screencasting on video temporal synchronization

Spatio-temporal desynchronization remains a major challenge for watermarking system as it could impair the detection of the hidden payload. Over the years, several (non-blind) registration techniques have been proposed to realign the analyzed content prior to watermark detection and thereby achieve...

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Bibliographic Details
Main Authors: Chupeau, Bertrand, Robert, Antoine, Baudry, Severine, Doerr, Gwenael
Format: Conference Proceeding
Language:English
Subjects:
desynchronization attack
Distortion
Encoding
Motion pictures
Software
temporal distortion
Video codecs
Video screencasting
Video sequences
Watermarking
Online Access:Request full text
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Description
Summary:Spatio-temporal desynchronization remains a major challenge for watermarking system as it could impair the detection of the hidden payload. Over the years, several (non-blind) registration techniques have been proposed to realign the analyzed content prior to watermark detection and thereby achieve robustness against severe attacks such as display-and-camcord. Such techniques rely on assumptions that may be invalidated by new attacks that had not been accounted for. In the case of video, for instance, best-in-class resynchronization techniques may have difficulties to cope with screencasting. In this paper, we report findings after an experimental study that involved five popular screencasting tools. The impact of screencasting can indeed be characterized in terms of frame drops and repeats. Moreover, the on-the-fly encoding process occurring during screen recapture inherently introduces dependencies between the likelihood of drop/repeat and the frame encoding type.
ISSN:2381-8549
DOI:10.1109/ICIP.2016.7533093