Given an input video, its associated audio, and a brief caption, the
audio-visual scene aware dialog (AVSD) task requires an agent to indulge in a
question-answer dialog with a human about the audio-visual content. This task
thus poses a challenging multi-modal representation learning and reasoning
scenario, advancements into which could influence several human-machine
interaction applications. To solve this task, we introduce a
semantics-controlled multi-modal shuffled Transformer reasoning framework,
consisting of a sequence of Transformer modules, each taking a modality as
input and producing representations conditioned on the input question. Our
proposed Transformer variant uses a shuffling scheme on their multi-head
outputs, demonstrating better regularization. To encode fine-grained visual
information, we present a novel dynamic scene graph representation learning
pipeline that consists of an intra-frame reasoning layer producing
spatio-semantic graph representations for every frame, and an inter-frame
aggregation module capturing temporal cues. Our entire pipeline is trained
end-to-end. We present experiments on the benchmark AVSD dataset, both on
answer generation and selection tasks. Our results demonstrate state-of-the-art
performances on all evaluation metrics.

本研究介绍了一种语义控制的多模态 Shuffled Transformer 推理框架，它包括一系列 Transformer 模块，用于解决 AVSD 任务中的多模态学习和推理，并提出了一种新型的动态场景图表示学习方法。实验结果表明，该模型在所有度量标准上均取得了最先进的性能。