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Uni-Sign: Toward Unified Sign Language Understanding at Scale

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arxiv 2501.15187 v3 pith:XFDP3U3A submitted 2025-01-25 cs.CV

classification cs.CV
keywords pre-traininglanguagesigntasksuni-signfine-tuningacrossdownstream
verification ladder T0 review T1 audit T2 compute T3 formal
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Sign language pre-training has gained increasing attention for its ability to enhance performance across various sign language understanding (SLU) tasks. However, existing methods often suffer from a gap between pre-training and fine-tuning, leading to suboptimal results. To address this, we propose Uni-Sign, a unified pre-training framework that eliminates the gap between pre-training and downstream SLU tasks through a large-scale generative pre-training strategy and a novel fine-tuning paradigm. First, we introduce CSL-News, a large-scale Chinese Sign Language (CSL) dataset containing 1,985 hours of video paired with textual annotations, which enables effective large-scale pre-training. Second, Uni-Sign unifies SLU tasks by treating downstream tasks as a single sign language translation (SLT) task during fine-tuning, ensuring seamless knowledge transfer between pre-training and fine-tuning. Furthermore, we incorporate a prior-guided fusion (PGF) module and a score-aware sampling strategy to efficiently fuse pose and RGB information, addressing keypoint inaccuracies and improving computational efficiency. Extensive experiments across multiple SLU benchmarks demonstrate that Uni-Sign achieves state-of-the-art performance across multiple downstream SLU tasks. Dataset and code are available at github.com/ZechengLi19/Uni-Sign.

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Forward citations

Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Attention-Steered Vision-Language Models for Sign Language Translation

    cs.CV 2026-07 conditional novelty 6.0 of 10

    AttnSign adds spatial attention supervision and motion-cadence reinforcement learning to a VLM, improving sign language translation accuracy on How2Sign and OpenASL.

  2. Sign Language Question Answering: A New Task, Benchmark, and Baseline for Sign Language Understanding

    cs.AI 2026-07 conditional novelty 6.0 of 10

    Sign Language QA benchmarks are introduced from PHOENIX14T and CSL-Daily via template-generated questions, and a question-conditioned baseline outperforms video-language and cascaded baselines.

  3. DESign: Dynamic Context-Aware Convolution and Efficient Subnet Regularization for Continuous Sign Language Recognition

    cs.CV 2025-07 conditional novelty 6.0 of 10

    A sign language recognition model using context-aware dynamic convolutions and subnetwork CTC regularization reports new state-of-the-art word error rates on PHOENIX14, PHOENIX14-T, and CSL-Daily.

  4. Bridging Sign and Spoken Languages: Pseudo Gloss Generation for Sign Language Translation

    cs.CV 2025-05 conditional novelty 6.0 of 10

    LLM-generated pseudo glosses, reordered via weak video supervision, enable sign language translation that rivals gloss-supervised models while needing only 30 gloss examples.

  5. SAGE: Segment-Aware Gloss-Free Encoding for Token-Efficient Sign Language Translation

    cs.CV 2025-07 conditional novelty 5.0 of 10

    SAGE uses a frozen sign-segmentation model to turn sign videos into about half as many visual tokens as prior methods, then aligns those tokens with a language model to reach BLEU-4 of 24.10 on PHOENIX14T.

  6. Sign Spotting Disambiguation using Large Language Models

    cs.CV 2025-07 conditional novelty 5.0 of 10

    LLM-based beam search disambiguation improves dictionary sign spotting WER from 47.2% to 44.4% on an internal BSL dataset.

  7. Using Sign Language Production as Data Augmentation to enhance Sign Language Translation

    cs.CL 2025-06 conditional novelty 5.0 of 10

    Adding synthetic sign-language data produced by stitching, a GAN, or Gaussian splatting to the training set improves sign-language translation, with the largest gains for skeleton-pose models.

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