Learning Digits via Audio-Visual Representations


Our goal is to explore models for language learning (in this case learning numerical digits in their spoken and visual representations) in the manner that humans learn languages as children. Namely, children do not have intermediary text transcriptions in corresponding visual and audio inputs from the world around them; rather, they directly make connections between what they see and what they hear. In this paper, we construct models for the direct bi-directional classification of speech and images, inspired by a few research papers. We experiment with architectures of two convolutional neural networks, one on the TIDIGITS data set (audio) and the other on the MNIST data set (visual), to obtain joint representations of single digits from spoken utterances and images. Finally, we experiment with an alignment model that ties together the convnets to learn these joint representations. We report an overall image annotation accuracy of 88.5% and an overall image retrieval accuracy of 87.6%.

I worked with Sitara Persad and Karan Kashyap on this final project.

See our paper writeup here.

Our GitHub repository for the project is available here.