Understanding dynamic scenes and dialogue contexts in order to converse with users has been challenging for multimodal dialogue systems. The 8-th Dialog System Technology Challenge (DSTC8) proposed an Audio Visual Scene-Aware Dialog (AVSD) task, which contains multiple modalities including audio, vision, and language, to evaluate how dialogue systems understand different modalities and response to users. In this paper, we proposed a multi-step joint-modality attention network (JMAN) based on recurrent neural network (RNN) to reason on videos. Our model performs a multi-step attention mechanism and jointly considers both visual and textual representations in each reasoning process to better integrate information from the two different modalities. Compared to the baseline released by AVSD organizers, our model achieves a relative 12.1% and 22.4% improvement over the baseline on ROUGE-L score and CIDEr score.

本文提出了一种基于循环神经网络的多步关注机制的多模态联合注意网络（JMAN），用于对视频进行推理，该模型在每个推理过程中联合考虑了视觉和文本表示，以更好地集成两种不同模态的信息。与AVSD组织发布的基线相比，我们的模型在ROUGE-L得分和CIDEr得分上相对提高了12.1％和22.4％。

面向场景感知对话系统的多步骤多模态注意力网络