BERT representations for Video Question Answering

Zekun Yang, Noa Garcia, Chenhui Chu, Mayu Otani, Yuta Nakashima, Haruo Takemura; The IEEE Winter Conference on Applications of Computer Vision (WACV), 2020, pp. 1556-1565

Abstract


Visual question answering (VQA) aims at answering questions about the visual content of an image or a video. Currently, most work on VQA is focused on image-based question answering, and less attention has been paid into answering questions about videos. However, VQA in video presents some unique challenges that are worth studying: it not only requires to model a sequence of visual features over time, but often it also needs to reason about associated subtitles. In this work, we propose to use BERT, a sequential modelling technique based on Transformers, to encode the complex semantics from video clips. Our proposed model jointly captures the visual and language information of a video scene by encoding not only the subtitles but also a sequence of visual concepts with a pre-trained language-based Transformer. In our experiments, we exhaustively study the performance of our model by taking different input arrangements, showing outstanding improvements when compared against previous work on two well-known video VQA datasets: TVQA and Pororo.

Related Material


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[bibtex]
@InProceedings{Yang_2020_WACV,
author = {Yang, Zekun and Garcia, Noa and Chu, Chenhui and Otani, Mayu and Nakashima, Yuta and Takemura, Haruo},
title = {BERT representations for Video Question Answering},
booktitle = {The IEEE Winter Conference on Applications of Computer Vision (WACV)},
month = {March},
year = {2020}
}