  In this work, we introduce the BBC-Oxford British Sign Language (BOBSL)
dataset, a large-scale video collection of British Sign Language (BSL). BOBSL
is an extended and publicly released dataset based on the BSL-1K dataset
introduced in previous work. We describe the motivation for the dataset,
together with statistics and available annotations. We conduct experiments to
provide baselines for the tasks of sign recognition, sign language alignment,
and sign language translation. Finally, we describe several strengths and
limitations of the data from the perspectives of machine learning and
linguistics, note sources of bias present in the dataset, and discuss potential
applications of BOBSL in the context of sign language technology. The dataset
is available at https://www.robots.ox.ac.uk/~vgg/data/bobsl/.
