We propose UniViLM: a Unified Video and Language pre-training Model for multimodal understanding and generation. Motivated by the recent success of BERT based pre-training technique for NLP and image-language tasks, VideoBERT and CBT are proposed to exploit BERT model for video and language pre-training using narrated instructional videos. Different from their works which only pre-train understanding task, we propose a unified video-language pre-training model for both understanding and generation tasks. Our model comprises of 4 components including two single-modal encoders, a cross encoder and a decoder with the Transformer backbone. We first pre-train our model to learn the universal representation for both video and language on a large instructional video dataset. Then we fine-tune the model on two multimodal tasks including understanding task (text-based video retrieval) and generation task (multimodal video captioning). Our extensive experiments show that our method can improve the performance of both understanding and generation tasks and achieves the state-of-the art results.

本论文提出了UniVL：一种统一的视频和语言预训练模型，旨在为多模态理解和生成任务提供强大的视频和文本表示，并通过五个目标以及分阶段和增强视频表示的预训练策略来训练各组件，最终在五个下游任务上实现了最新的成果。

UniVL: 用于多模态理解和生成的统一视频与语言预训练模型