TLRNet: Tibetan Lip Reading Based on ResNet and BiGRU

Lip reading, also known as visual speech recognition, is a way of human-computer interaction based on visual information. At present, the research on lip reading mainly focuses on English and Mandarin Chinese, and there are relatively few studies on Tibetan, a low-resource minority language. Therefore, the present study proposes a specific deep learning model named the TLRNet for word-level visual speech recognition for Tibetan. The model comprises the ResNet-18 architecture, which is a residual neural network, and the BiGRU layer, a bi-directional gated recurrent unit. We train and evaluate it on the TLRW-50 dataset, which consists of fifty common Tibetan words. Our proposed model achieves Top-1 and Top-5 classification accuracies of 41.82% and 59.37%, respectively, demonstrating its potential effectiveness in recognizing Tibetan spoken words based on visual cues.