LipNet: End-to-End Sentence-level LipreadingDownload PDF

15 Oct 2024 (modified: 22 Oct 2023)Submitted to ICLR 2017Readers: Everyone
Abstract: Lipreading is the task of decoding text from the movement of a speaker's mouth. Traditional approaches separated the problem into two stages: designing or learning visual features, and prediction. More recent deep lipreading approaches are end-to-end trainable (Wand et al., 2016; Chung & Zisserman, 2016a). However, existing work on models trained end-to-end perform only word classification, rather than sentence-level sequence prediction. Studies have shown that human lipreading performance increases for longer words (Easton & Basala, 1982), indicating the importance of features capturing temporal context in an ambiguous communication channel. Motivated by this observation, we present LipNet, a model that maps a variable-length sequence of video frames to text, making use of spatiotemporal convolutions, a recurrent network, and the connectionist temporal classification loss, trained entirely end-to-end. To the best of our knowledge, LipNet is the first end-to-end sentence-level lipreading model that simultaneously learns spatiotemporal visual features and a sequence model. On the GRID corpus, LipNet achieves 95.2% accuracy in sentence-level, overlapped speaker split task, outperforming experienced human lipreaders and the previous 86.4% word-level state-of-the-art accuracy (Gergen et al., 2016).
TL;DR: LipNet is the first end-to-end sentence-level lipreading model to simultaneously learn spatiotemporal visual features and a sequence model.
Conflicts: cs.ox.ac.uk, google.com
Keywords: Computer vision, Deep learning
Community Implementations: [![CatalyzeX](/images/catalyzex_icon.svg) 10 code implementations](https://www.catalyzex.com/paper/arxiv:1611.01599/code)
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