Video-aided Unsupervised Grammar Induction

• URL: http://arxiv.org/abs/2104.04369v1
• Date: Fri, 9 Apr 2021 14:01:36 GMT
• Title: Video-aided Unsupervised Grammar Induction
• Authors: Songyang Zhang, Linfeng Song, Lifeng Jin, Kun Xu, Dong Yu, Jiebo Luo
• Abstract summary: We investigate video-aided grammar induction, which learns a constituency from both unlabeled text and its corresponding video. Video provides even richer information, including not only static objects but also actions and state changes useful for inducing verb phrases. We propose a Multi-Modal Compound PCFG model (MMC-PCFG) to effectively aggregate these rich features from different modalities.
• Score: 108.53765268059425
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate video-aided grammar induction, which learns a constituency parser from both unlabeled text and its corresponding video. Existing methods of multi-modal grammar induction focus on learning syntactic grammars from text-image pairs, with promising results showing that the information from static images is useful in induction. However, videos provide even richer information, including not only static objects but also actions and state changes useful for inducing verb phrases. In this paper, we explore rich features (e.g. action, object, scene, audio, face, OCR and speech) from videos, taking the recent Compound PCFG model as the baseline. We further propose a Multi-Modal Compound PCFG model (MMC-PCFG) to effectively aggregate these rich features from different modalities. Our proposed MMC-PCFG is trained end-to-end and outperforms each individual modality and previous state-of-the-art systems on three benchmarks, i.e. DiDeMo, YouCook2 and MSRVTT, confirming the effectiveness of leveraging video information for unsupervised grammar induction.

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