There have been a few recent methods proposed in text to video moment
retrieval using natural language queries, but requiring full supervision during
training. However, acquiring a large number of training videos with temporal
boundary annotations for each text description is extremely time-consuming and
often not scalable. In order to cope with this issue,
用混合学习的方法，从全监督的源领域迁移到弱标记的目标领域，提高视频时刻检索模型的学习能力。通过引入多支视觉文本对齐模型 (EVA)，实现跨模态匹配信息共享和多模态特征对齐，优化领域不变的视觉和文本特征，以及具有判别性的联合视频和文本表示。实验证明 EVA 在源领域的时间段注释中的有效性，可以帮助在目标领域中学习无时间标签的视频时刻检索。