arXiv:2609.38246v1 Announce Type: new Abstract: Deepfakes no longer need to fake a whole video. Generators that read the transcript now alter only the few seconds in which a video's meaning turns, so a forgery hides in a small, unknown fraction of the video. Yet detectors still read every one-second window of both the audio and image streams, spending nearly all of their compute where nothing was altered.
ModalFidelity: Routing Modalities for Deepfake Detection on a Budget
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