This paper studies the problem of temporal moment localization in a long untrimmed video using natural language as the query. Given an untrimmed video and a sentence as the query, the goal is to determine the starting, and the ending, of the relevant visual moment in the video, that corresponds to the query sentence. While previous works have tackled this task by a propose-and-rank approach, we introduce a more efficient, end-to-end trainable, and {\em proposal-free approach} that relies on three key components: a dynamic filter to transfer language information to the visual domain, a new loss function to guide our model to attend the most relevant parts of the video, and soft labels to model annotation uncertainty. We evaluate our method on two benchmark datasets, Charades-STA and ActivityNet-Captions. Experimental results show that our approach outperforms state-of-the-art methods on both datasets.

本文提出了一种更有效率的、端到端可训练的、不需要先提出建议的方法，以自然语言作为查询，解决了在长视频中定位时间点的问题。通过引入动态滤波器、新的损失函数和软标签等三个关键组件，实现从语言信息到视觉领域的转换，并评估了该方法在两个基准数据集上的表现优越性。

使用引导注意力在视频中进行自然语言查询的无需提议的时间时刻定位