Sign2Speech: A Novel Sign Language to Speech Synthesis Pipeline

The lack of assistive Sign Language technologies for members of the Deaf community has impeded their access to public information, and curtailed their civil rights and social inclusion. In this paper, we introduce a novel proof-of-concept method for end-to-end Sign Language to speech translation without an intermediate text representation.We propose an LSTM-based method to generate speech from hand pose, where the latter can be obtained from applying an off-the-shelf pose predictor to fingerspelling videos. We train our model using a custom dataset of synthetically generated signs annotated with speech labels, and test on a real-world dataset of fingerspelling signs. Our generated output resembles real-world data sufficiently on quantitative measurements. This indicates that our techniques can be used to generate speech from signs, without reliance on text. The use of synthetic datasets further reduces the reliance on real-world, annotated data. However, results can be further improved using hybrid datasets, combining real-world and synthetic data. Our code and datasets are available at https://github.com/DanBigioi/Sign2Speech.