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arXiv · 2604.07741

MSCT: Differential Cross-Modal Attention for Deepfake Detection

Fangda Wei·Miao Liu·Yingxue Wang·Jing Wang·Shenghui Zhao·Nan Li
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Abstract

Audio-visual deepfake detection typically employs a complementary multi-modal model to check the forgery traces in the video. These methods primarily extract forgery traces through audio-visual alignment, which results from the inconsistency between audio and video modalities. However, the traditional multi-modal forgery detection method has the problem of insufficient feature extraction and modal alignment deviation. To address this, we propose a multi-scale cross-modal transformer encoder (MSCT) for deepfake detection. Our approach includes a multi-scale self-attention to integrate the features of adjacent embeddings and a differential cross-modal attention to fuse multi-modal features. Our experiments demonstrate competitive performance on the FakeAVCeleb dataset, validating the effectiveness of the proposed structure.

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Fangda Wei, Miao Liu, Yingxue Wang, Jing Wang, Shenghui Zhao, Nan Li. 2026-04-09. MSCT: Differential Cross-Modal Attention for Deepfake Detection. https://arxiv.org/abs/2604.07741

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