LAVENDER: Unifying Video-Language Understanding as Masked Language Modeling

• URL: http://arxiv.org/abs/2206.07160v1
• Date: Tue, 14 Jun 2022 20:43:25 GMT
• Title: LAVENDER: Unifying Video-Language Understanding as Masked Language Modeling
• Authors: Linjie Li, Zhe Gan, Kevin Lin, Chung-Ching Lin, Zicheng Liu, Ce Liu, Lijuan Wang
• Abstract summary: Masked Language Modeling (MLM) is used as the common interface for all pre-training and downstream tasks. Experiments show that this unified framework achieves competitive performance on 14 VidL benchmarks.
• Score: 102.42424022921243
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Unified vision-language frameworks have greatly advanced in recent years, most of which adopt an encoder-decoder architecture to unify image-text tasks as sequence-to-sequence generation. However, existing video-language (VidL) models still require task-specific designs in model architecture and training objectives for each task. In this work, we explore a unified VidL framework LAVENDER, where Masked Language Modeling (MLM) is used as the common interface for all pre-training and downstream tasks. Such unification leads to a simplified model architecture, where only a lightweight MLM head, instead of a decoder with much more parameters, is needed on top of the multimodal encoder. Surprisingly, experimental results show that this unified framework achieves competitive performance on 14 VidL benchmarks, covering video question answering, text-to-video retrieval and video captioning. Extensive analyses further demonstrate the advantage of LAVENDER over existing VidL methods in: (i) supporting all downstream tasks with just a single set of parameter values when multi-task finetuned; (ii) few-shot generalization on various downstream tasks; and (iii) enabling zero-shot evaluation on video question answering tasks. Code is available at https://github.com/microsoft/LAVENDER.

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